In cooperation with Illinois

Agricultural Experiment

Station

United States

Department of

Agriculture

Natural

Resources

Conservation

Service

Soil Survey of

Knox County,

Illinois
The Natural Resources Conservation Service (NRCS) is committed to making its

information accessible to all of its customers and employees. If you are experiencing

accessibility issues and need assistance, please contact our Helpdesk by phone at

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NRCS Accessibility Statement
This publication consists of a manuscript and a set of soil maps. The information

provided can be useful in planning the use and management of small areas.

To find information about your area of interest, locate that area on the Index to Map

Sheets. Note the number of the map sheet and turn to that sheet.

Locate your area of interest on the map sheet. Note the map unit symbols that are in

that area. Turn to the Contents, which lists the map units by symbol and name and

shows the page where each map unit is described. The map symbols and names also

appear as bookmarks, which link directly to the appropriate page in the publication.

The Contents shows which table has data on a specific land use for each detailed

soil map unit. Also see the Contents for sections of this publication that may address

your specific needs.

i

How To Use This Soil Survey
Additional information about the Nation’s natural resources is available online

from the Natural Resources Conservation Service at http://www.nrcs.usda.gov.

ii

National Cooperative Soil Survey

This soil survey is a publication of the National Cooperative Soil Survey, a joint effort

of the United States Department of Agriculture and other Federal agencies, State

agencies including the Agricultural Experiment Stations, and local agencies. The Natural

Resources Conservation Service (formerly the Soil Conservation Service) has

leadership for the Federal part of the National Cooperative Soil Survey. This survey was

made cooperatively by the Natural Resources Conservation Service and the Illinois

Agricultural Experiment Station. It is part of the technical assistance furnished to the

Knox County Soil and Water Conservation District. Financial assistance was provided by

Knox County and the Illinois Department of Agriculture.

Major fieldwork for this soil survey was completed in 2002. Soil names and

descriptions were approved in 2003. Unless otherwise indicated, statements in this

publication refer to conditions in the survey area in 2003. The most current official data

are available on the Internet.

Soil maps in this survey may be copied without permission. Enlargement of these

maps, however, could cause misunderstanding of the detail of mapping. If enlarged,

maps do not show the small areas of contrasting soils that could have been shown at a

larger scale.

Nondiscrimination Statement

The United States Department of Agriculture (USDA) prohibits discrimination in all its

programs and activities on the basis of race, color, national origin, sex, religion, age,

disability, political beliefs, sexual orientation, or marital or family status. (Not all

prohibited bases apply to all programs.) Persons with disabilities who require alternative

means for communication of program information (Braille, large print, audiotape, etc.)

should contact the USDA’s TARGET Center at (202) 720-2600 (voice and TDD).

To file a complaint of discrimination, write USDA, Director, Office of Civil Rights,

Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C.

20250-9410, or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity

provider and employer.

Cover Photo Caption

A protective cover of crop residue in an area of Fayette soils in Knox County, Illinois.
iii

Contents

How To Use This Soil Survey .......................................................................................i

Numerical Index to Map Units .................................................................................. vii

Foreword ..................................................................................................................... ix

General Nature of the County ...................................................................................... 1

Farming .................................................................................................................... 1

Relief, Physiography, and Drainage ......................................................................... 2

Climate ..................................................................................................................... 4

How This Survey Was Made ........................................................................................ 4

Formation and Classification of the Soils................................................................ 7

Formation of the Soils .............................................................................................. 7

Parent Material .................................................................................................... 7

Living Organisms ................................................................................................. 8

Climate ................................................................................................................ 9

Topography .......................................................................................................... 9

Time ................................................................................................................... 10

Classification of the Soils ....................................................................................... 10

Soil Series and Detailed Soil Map Units ................................................................. 13

Alvin Series ............................................................................................................ 14

131B—Alvin sandy loam, 2 to 5 percent slopes ..................................................... 16

131D—Alvin sandy loam, 10 to 18 percent slopes ................................................ 16

131F—Alvin sandy loam, 18 to 35 percent slopes ................................................. 17

Assumption Series ................................................................................................. 18

259C2—Assumption silt loam, 5 to 10 percent slopes, eroded.............................. 19

259D2—Assumption silt loam, 10 to 18 percent slopes, eroded............................ 20

259D3—Assumption silty clay loam, 10 to 18 percent slopes, severely eroded .... 21

Atlas Series ............................................................................................................ 22

7D3—Atlas silty clay loam, 10 to 18 percent slopes, severely eroded ................... 24

Camden Series ...................................................................................................... 25

134B—Camden silt loam, 2 to 5 percent slopes .................................................... 26

134C2—Camden silt loam, 5 to 10 percent slopes, eroded ................................... 27

134D2—Camden silt loam, 10 to 18 percent slopes, eroded ................................. 28

Clarksdale Series ................................................................................................... 28

257A—Clarksdale silt loam, 0 to 2 percent slopes................................................. 30

9257A—Clarksdale silt loam, terrace, 0 to 2 percent slopes ................................. 31

Coatsburg Series ................................................................................................... 32

660C2—Coatsburg silty clay loam, 5 to 10 percent slopes, eroded ....................... 34

Denny Series ......................................................................................................... 35

45A—Denny silt loam, 0 to 2 percent slopes ......................................................... 36

Dorchester Series .................................................................................................. 37

8239A—Dorchester silt loam, 0 to 2 percent slopes, occasionally flooded ............ 38

536—Dumps, mine ................................................................................................ 39

835G—Earthen dams ............................................................................................ 39

Edinburg Series ..................................................................................................... 39

249A—Edinburg silty clay loam, 0 to 2 percent slopes .......................................... 41

Elco Series ............................................................................................................. 41
iv

119D2—Elco silt loam, 10 to 18 percent slopes, eroded ....................................... 43

119E2—Elco silt loam, 18 to 25 percent slopes, eroded........................................ 44

Elkhart Series ........................................................................................................ 45

567B2—Elkhart silt loam, 2 to 5 percent slopes, eroded ....................................... 46

567C2—Elkhart silt loam, 5 to 10 percent slopes, eroded ..................................... 47

567D2—Elkhart silt loam, 10 to 18 percent slopes, eroded ................................... 48

567D3—Elkhart silty clay loam, 10 to 18 percent slopes, severely eroded ............ 48

Fayette Series ........................................................................................................ 49

280B—Fayette silt loam, 2 to 5 percent slopes ...................................................... 50

280C2—Fayette silt loam, 5 to 10 percent slopes, eroded ..................................... 51

280D2—Fayette silt loam, 10 to 18 percent slopes, eroded ................................... 52

280F—Fayette silt loam, 18 to 35 percent slopes .................................................. 53

9280B—Fayette silt loam, terrace, 2 to 5 percent slopes ....................................... 53

9280C2—Fayette silt loam, terrace, 5 to 10 percent slopes, eroded...................... 54

Greenbush Series .................................................................................................. 55

675B—Greenbush silt loam, 2 to 5 percent slopes ................................................ 56

9675B—Greenbush silt loam, terrace, 2 to 5 percent slopes ................................. 57

Harvard Series ....................................................................................................... 58

344B—Harvard silt loam, 2 to 5 percent slopes ..................................................... 59

Hickory Series ........................................................................................................ 60

8D2—Hickory silt loam, 10 to 18 percent slopes, eroded ...................................... 61

8F—Hickory silt loam, 18 to 35 percent slopes ...................................................... 62

8F2—Hickory silt loam, 18 to 35 percent slopes, eroded ....................................... 63

8G—Hickory silt loam, 35 to 60 percent slopes ..................................................... 64

Huntsville Series .................................................................................................... 65

8077A—Huntsville silt loam, 0 to 2 percent slopes, occasionally flooded .............. 65

Ipava Series ........................................................................................................... 66

43A—Ipava silt loam, 0 to 2 percent slopes ........................................................... 68

901B—Ipava-Osco silt loams, 2 to 5 percent slopes.............................................. 68

902A—Ipava-Sable complex, 0 to 2 percent slopes............................................... 70

Keomah Series....................................................................................................... 71

17A—Keomah silt loam, 0 to 2 percent slopes ...................................................... 72

9017A—Keomah silt loam, terrace, 0 to 2 percent slopes ..................................... 73

Lawson Series ....................................................................................................... 74

3451A—Lawson silt loam, 0 to 2 percent slopes, frequently flooded ..................... 75

Lenzburg Series ..................................................................................................... 76

871B—Lenzburg silty clay loam, 1 to 7 percent slopes.......................................... 76

871D—Lenzburg silty clay loam, 7 to 20 percent slopes ....................................... 77

871G—Lenzburg silty clay loam, 20 to 60 percent slopes ..................................... 78

Littleton Series ....................................................................................................... 79

7081B—Littleton silt loam, 1 to 3 percent slopes, rarely flooded ........................... 80

Marseilles Series.................................................................................................... 80

549D2—Marseilles silt loam, 10 to 18 percent slopes, eroded .............................. 82

549F—Marseilles silt loam, 18 to 35 percent slopes .............................................. 83

549G—Marseilles silt loam, 35 to 60 percent slopes ............................................. 83

M-W—Miscellaneous water ................................................................................... 85

Orion Series ........................................................................................................... 85

3415A—Orion silt loam, 0 to 2 percent slopes, frequently flooded ........................ 86

801B—Orthents, silty, undulating ........................................................................... 87

802B—Orthents, loamy, undulating........................................................................ 87

Osco Series ........................................................................................................... 88

86B—Osco silt loam, 2 to 5 percent slopes ........................................................... 90

86B2—Osco silt loam, 2 to 5 percent slopes, eroded ............................................ 90

86C—Osco silt loam, 5 to 10 percent slopes ......................................................... 91
v

86C2—Osco silt loam, 5 to 10 percent slopes, eroded .......................................... 92

86D2—Osco silt loam, 10 to 18 percent slopes, eroded ........................................ 93

9086B—Osco silt loam, terrace, 2 to 5 percent slopes .......................................... 94

863—Pits, clay ....................................................................................................... 95

864—Pits, quarries ................................................................................................ 95

865—Pits, gravel .................................................................................................... 95

Radford Series ....................................................................................................... 95

3074A—Radford silt loam, 0 to 2 percent slopes, frequently flooded..................... 96

Rapatee Series ...................................................................................................... 97

872B—Rapatee silty clay loam, 2 to 5 percent slopes ........................................... 98

Rozetta Series ....................................................................................................... 99

279B—Rozetta silt loam, 2 to 5 percent slopes ................................................... 100

279C2—Rozetta silt loam, 5 to 10 percent slopes, eroded .................................. 101

9279B—Rozetta silt loam, terrace, 2 to 5 percent slopes .................................... 101

9279C2—Rozetta silt loam, terrace, 5 to 10 percent slopes, eroded ................... 102

Sable Series ......................................................................................................... 103

68A—Sable silty clay loam, 0 to 2 percent slopes ............................................... 104

Sawmill Series ..................................................................................................... 105

3107+—Sawmill silt loam, 0 to 2 percent slopes, frequently flooded,

overwash ......................................................................................................... 106

Sylvan Series ........................................................................................................ 107

19C3—Sylvan silty clay loam, 5 to 10 percent slopes, severely eroded ............... 109

19D3—Sylvan silty clay loam, 10 to 18 percent slopes, severely eroded.............. 110

Virgil Series ........................................................................................................... 110

7104A—Virgil silt loam, 0 to 2 percent slopes, rarely flooded................................ 112

W—Water .............................................................................................................. 113

Use and Management of the Soils .......................................................................... 115

Interpretive Ratings ............................................................................................... 115

Rating Class Terms ........................................................................................... 115

Numerical Ratings ............................................................................................. 115

Crops and Pasture ................................................................................................. 116

Crop Yield Estimates ......................................................................................... 116

Land Capability Classification ........................................................................... 117

Prime Farmland ................................................................................................. 117

Hydric Soils ........................................................................................................... 118

Forestland Productivity and Management.............................................................. 119

Windbreaks and Environmental Plantings.............................................................. 122

Recreation ............................................................................................................. 122

Wildlife Habitat ...................................................................................................... 125

Engineering ........................................................................................................... 126

Building Site Development ................................................................................ 128

Sanitary Facilities .............................................................................................. 129

Construction Materials ...................................................................................... 131

Water Management ........................................................................................... 133

Soil Properties ......................................................................................................... 135

Engineering Index Properties ................................................................................ 135

Physical Properties ............................................................................................... 136

Chemical Properties .............................................................................................. 138

Water Features ...................................................................................................... 138

Soil Features ......................................................................................................... 139

References ................................................................................................................ 141

Glossary ................................................................................................................... 143

Tables ....................................................................................................................... 161

Table 1.—Temperature and Precipitation ................................................................ 162
vi

Table 2.—Freeze Dates in Spring and Fall ............................................................. 163

Table 3.—Growing Season..................................................................................... 163

Table 4.—Classification of the Soils ...................................................................... 164

Table 5.—Acreage and Proportionate Extent of the Soils ...................................... 165

Table 6.—Land Capability and Yields per Acre of Crops and Pasture .................... 167

Table 7.—Prime Farmland ...................................................................................... 171

Table 8.—Hydric Soils ........................................................................................... 172

Table 9.—Forestland Productivity .......................................................................... 174

Table 10a.—Forestland Management..................................................................... 183

Table 10b.—Forestland Management ..................................................................... 190

Table 10c.—Forestland Management..................................................................... 197

Table 10d.—Forestland Management..................................................................... 203

Table 10e.—Forestland Management..................................................................... 208

Table 11.—Windbreaks and Environmental Plantings ............................................ 213

Table 12a.—Recreational Development ................................................................. 226

Table 12b.—Recreational Development.................................................................. 233

Table 13.—Wildlife Habitat..................................................................................... 238

Table 14a.—Building Site Development ................................................................. 243

Table 14b.—Building Site Development ................................................................. 251

Table 15a.—Sanitary Facilities .............................................................................. 260

Table 15b.—Sanitary Facilities ............................................................................... 269

Table 16a.—Construction Materials ....................................................................... 277

Table 16b.—Construction Materials ....................................................................... 287

Table 17a.—Water Management ............................................................................ 288

Table 17b.—Water Management ............................................................................ 295

Table 18.—Engineering Index Properties ............................................................... 303

Table 19.—Physical Properties of the Soils .......................................................... 317

Table 20.—Chemical Properties of the Soils ......................................................... 324

Table 21.—Water Features..................................................................................... 331

Table 22.—Soil Features........................................................................................ 335

Issued July 2005
vii

7D3—Atlas silty clay loam, 10 to 18 percent slopes, severely eroded ........................24

8D2—Hickory silt loam, 10 to 18 percent slopes, eroded.............................................61

8F—Hickory silt loam, 18 to 35 percent slopes ...........................................................62

8F2—Hickory silt loam, 18 to 35 percent slopes, eroded .............................................63

8G—Hickory silt loam, 35 to 60 percent slopes ...........................................................64

17A—Keomah silt loam, 0 to 2 percent slopes ............................................................72

19C3—Sylvan silty clay loam, 5 to 10 percent slopes, severely eroded .................... 109

19D3—Sylvan silty clay loam, 10 to 18 percent slopes, severely eroded .................. 110

43A—Ipava silt loam, 0 to 2 percent slopes ................................................................68

45A—Denny silt loam, 0 to 2 percent slopes ...............................................................36

68A—Sable silty clay loam, 0 to 2 percent slopes .................................................... 104

86B—Osco silt loam, 2 to 5 percent slopes ................................................................90

86B2—Osco silt loam, 2 to 5 percent slopes, eroded ..................................................90

86C—Osco silt loam, 5 to 10 percent slopes ..............................................................91

86C2—Osco silt loam, 5 to 10 percent slopes, eroded ................................................92

86D2—Osco silt loam, 10 to 18 percent slopes, eroded ..............................................93

119D2—Elco silt loam, 10 to 18 percent slopes, eroded..............................................43

119E2—Elco silt loam, 18 to 25 percent slopes, eroded..............................................44

131B—Alvin sandy loam, 2 to 5 percent slopes ..........................................................16

131D—Alvin sandy loam, 10 to 18 percent slopes ......................................................16

131F—Alvin sandy loam, 18 to 35 percent slopes .......................................................17

134B—Camden silt loam, 2 to 5 percent slopes ..........................................................26

134C2—Camden silt loam, 5 to 10 percent slopes, eroded..........................................27

134D2—Camden silt loam, 10 to 18 percent slopes, eroded .......................................28

249A—Edinburg silty clay loam, 0 to 2 percent slopes ................................................41

257A—Clarksdale silt loam, 0 to 2 percent slopes ......................................................30

259C2—Assumption silt loam, 5 to 10 percent slopes, eroded ....................................19

259D2—Assumption silt loam, 10 to 18 percent slopes, eroded ..................................20

259D3—Assumption silty clay loam, 10 to 18 percent slopes, severely eroded ..........21

279B—Rozetta silt loam, 2 to 5 percent slopes ......................................................... 100

279C2—Rozetta silt loam, 5 to 10 percent slopes, eroded ........................................ 101

280B—Fayette silt loam, 2 to 5 percent slopes ...........................................................50

280C2—Fayette silt loam, 5 to 10 percent slopes, eroded ...........................................51

280D2—Fayette silt loam, 10 to 18 percent slopes, eroded .........................................52

280F—Fayette silt loam, 18 to 35 percent slopes ........................................................53

344B—Harvard silt loam, 2 to 5 percent slopes ...........................................................59

536—Dumps, mine ......................................................................................................39

549D2—Marseilles silt loam, 10 to 18 percent slopes, eroded.....................................82

549F—Marseilles silt loam, 18 to 35 percent slopes....................................................83

549G—Marseilles silt loam, 35 to 60 percent slopes ...................................................83

567B2—Elkhart silt loam, 2 to 5 percent slopes, eroded .............................................46

567C2—Elkhart silt loam, 5 to 10 percent slopes, eroded ...........................................47

567D2—Elkhart silt loam, 10 to 18 percent slopes, eroded .........................................48

567D3—Elkhart silty clay loam, 10 to 18 percent slopes, severely eroded .................48

660C2—Coatsburg silty clay loam, 5 to 10 percent slopes, eroded .............................34

Numerical Index to Map Units
viii

675B—Greenbush silt loam, 2 to 5 percent slopes ......................................................56

801B—Orthents, silty, undulating ................................................................................87

802B—Orthents, loamy, undulating .............................................................................87

835G—Earthen dams ..................................................................................................39

863—Pits, clay ............................................................................................................95

864—Pits, quarries ......................................................................................................95

865—Pits, gravel .........................................................................................................95

871B—Lenzburg silty clay loam, 1 to 7 percent slopes ...............................................76

871D—Lenzburg silty clay loam, 7 to 20 percent slopes .............................................77

871G—Lenzburg silty clay loam, 20 to 60 percent slopes ...........................................78

872B—Rapatee silty clay loam, 2 to 5 percent slopes.................................................98

901B—Ipava-Osco silt loams, 2 to 5 percent slopes ...................................................68

902A—Ipava-Sable complex, 0 to 2 percent slopes ....................................................70

3074A—Radford silt loam, 0 to 2 percent slopes, frequently flooded ...........................96

3107+—Sawmill silt loam, 0 to 2 percent slopes, frequently flooded, overwash ........ 106

3415A—Orion silt loam, 0 to 2 percent slopes, frequently flooded...............................86

3451A—Lawson silt loam, 0 to 2 percent slopes, frequently flooded ...........................75

7081B—Littleton silt loam, 1 to 3 percent slopes, rarely flooded .................................80

7104A—Virgil silt loam, 0 to 2 percent slopes, rarely flooded .................................... 112

8077A—Huntsville silt loam, 0 to 2 percent slopes, occasionally flooded ...................65

8239A—Dorchester silt loam, 0 to 2 percent slopes, occasionally flooded ..................38

9017A—Keomah silt loam, terrace, 0 to 2 percent slopes ...........................................73

9086B—Osco silt loam, terrace, 2 to 5 percent slopes ................................................94

9257A—Clarksdale silt loam, terrace, 0 to 2 percent slopes .......................................31

9279B—Rozetta silt loam, terrace, 2 to 5 percent slopes .......................................... 101

9279C2—Rozetta silt loam, terrace, 5 to 10 percent slopes, eroded ......................... 102

9280B—Fayette silt loam, terrace, 2 to 5 percent slopes ............................................53

9280C2—Fayette silt loam, terrace, 5 to 10 percent slopes, eroded ............................54

9675B—Greenbush silt loam, terrace, 2 to 5 percent slopes .......................................57

M-W—Miscellaneous water..........................................................................................85

W—Water................................................................................................................... 113
ix

Soil surveys contain information that affects land use planning in survey areas. They

include predictions of soil behavior for selected land uses. The surveys highlight soil

limitations, improvements needed to overcome the limitations, and the impact of

selected land uses on the environment.

Soil surveys are designed for many different users. Farmers, foresters, and

agronomists can use the surveys to evaluate the potential of the soil and the

management needed for maximum food and fiber production. Planners, community

officials, engineers, developers, builders, and home buyers can use the surveys to

plan land use, select sites for construction, and identify special practices needed to

ensure proper performance. Conservationists, teachers, students, and specialists in

recreation, wildlife management, waste disposal, and pollution control can use the

surveys to help them understand, protect, and enhance the environment.

Various land use regulations of Federal, State, and local governments may impose

special restrictions on land use or land treatment. The information in this report is

intended to identify soil properties that are used in making various land use or land

treatment decisions. Statements made in this report are intended to help the land

users identify and reduce the effects of soil limitations on various land uses. The

landowner or user is responsible for identifying and complying with existing laws and

regulations.

Great differences in soil properties can occur within short distances. Some soils are

seasonally wet or subject to flooding. Some are too unstable to be used as a

foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic

tank absorption fields. A high water table makes a soil poorly suited to basements or

underground installations.

These and many other soil properties that affect land use are described in this soil

survey. The location of each soil is shown on the detailed soil maps. Each soil in the

survey area is described, and information on specific uses is given. Help in using this

publication and additional information are available at the local office of the Natural

Resources Conservation Service or the Cooperative Extension Service.

William J. Gradle

State Conservationist

Natural Resources Conservation Service

Foreword

1

KNOX COUNTY is in west-central Illinois (fig. 1). It has an area of 461,675 acres, or

about 721 square miles. In 2000, the county had a population of 55,836 (U.S.

Department of Commerce, 2002). Galesburg, the county seat, had a population of

33,706. Knox County is bordered on the north by Henry County, on the east by Stark

and Peoria Counties, on the west by Mercer and Warren Counties, and on the south

by Fulton County. Knox County is a subset of Major Land Resource Area (MLRA)

108B, the Illinois and Iowa Deep Loess and Drift, and MLRA 115C, the Central

Mississippi Valley Wooded Slopes (USDA, 1981).

This soil survey updates the prior published surveys of Knox County (Coffey and

others, 1904; Hopkins and others, 1913; Fehrenbacher and others, 1977; Windhorn,

1986). It provides additional information and has larger maps, which show the soils in

greater detail.

General Nature of the County

This section provides some general information about Knox County. It describes

farming; relief, physiography, and drainage; and climate.

Farming

Farming is a major enterprise in Knox County. In 1997, there were 928 operating

farms in the county (Illinois Agricultural Statistics Service, 2003). The average farm

size is about 420 acres. Much of the grain produced on the farms is fed to livestock.

Corn, soybeans, and hay are the main crops produced in the county. In 2002, about

156,100 acres was used for corn, 135,200 acres was used for soybeans, and 14,900

acres was used for hay (Illinois Agricultural Statistics Service, 2003). Hogs and cattle

are the main livestock. In 2002, the total number of swine was 113,600 and the total

number of cattle was 24,900 (Illinois Agricultural Statistics Service, 2003).

Soil Survey of

Knox County, Illinois

By Steven L. Elmer, Natural Resources Conservation Service

Original fieldwork by Roger D. Windhorn, Gary W. Goodrich, Mike E. Lilly, and

Charles L. Love, Natural Resources Conservation Service, and Mark W. Bramstedt,

Bruce J. Houghtby, Mike F. Kuhn, and Mark Matusiak, Knox County

Updated fieldwork by Steven L. Elmer, Frank E. Heisner, and Dave Preloger, Natural

Resources Conservation Service

Major assistance provided by Amy Kuhel and Stephen K. Higgins, Natural Resources

Conservation Service

United States Department of Agriculture, Natural Resources Conservation Service,

in cooperation with the Illinois Agricultural Experiment Station
2 Soil Survey of

Relief, Physiography, and Drainage

Knox County is mainly on a loess-covered Illinoian till plain. Glacial ice, running

water, and windblown deposits are the main factors that have determined the

landforms in the county (Russell, 1968). The northern and western parts of the county

LEGEND

95B—Southern Wisconsin and Northern Illinois Drift Plain

98—Southern Michigan and Northern Indiana Drift Plain

105—Northern Mississippi Valley Loess Hills

108A and 108B—Illinois and Iowa Deep Loess and Drift

110—Northern Illinois and Indiana Heavy Till Plain

113—Central Claypan Area

114B—Southern Illinois and Indiana Thin Loess and Till Plain

115A, 115B, and 115C—Central Mississippi Valley Wooded Slopes

120A—Kentucky and Indiana Sandstone and Shale Hills and Valleys

131A—Southern Mississippi Valley Alluvium

134—Southern Mississippi Valley Silty Uplands

Figure 1.—Location of Knox County and major land resource areas (MLRAs) in Illinois.
Knox County, Illinois 3

generally are gently rolling to nearly level, but the southern and southeastern parts are

much more diverse. The landscape is especially diverse in areas along the Spoon

River and its tributaries where erosion has caused a 50- to 200-foot drop in elevation

below the general level of the adjacent uplands.

The highest point in the county is about 870 feet above sea level (fig. 2). It is on

Pilot Knob in the northwestern part of the county. Pilot Knob is possibly a remnant of

the Table Grove recessional moraine, which was deposited by the glacier. The lowest

point, at a spot in London Mills where the Spoon River leaves the county, is about 520

feet above sea level.

Below the surface deposits of windblown silt and glacial till are extensive deposits of

Pennsylvanian shale. This shale varies in composition and occurs as outcrops,

generally near the base of steep slopes. Much of the county is underlain by bituminous

coal, which is within the shale deposits. The upper two seams of coal have been

surface mined, primarily in the eastern and southern parts of the county.

An elevated ridge cutting across the northwestern part divides the county into two

main drainage areas (Russell, 1968). In areas southeast of this ridge, drainage is

directed toward the basin of the Illinois River. The Spoon River and its tributaries drain

about 588 square miles of the areas in the county that are within this basin. Walnut,

French, Haw, Littlers, and Court Creeks are a few of the major tributaries. Kickapoo

Creek, which also is in the basin of the Illinois River, drains about 12 square miles in

the southeast corner of the county. It empties directly into the Illinois River.

Figure 2.—A shaded relief map of Knox County, Illinois.
4 Soil Survey of

In areas northwest of the elevated ridge, drainage is directed toward the basin of the

Mississippi River. Pope and Henderson Creeks drain the northwestern part of the

county. They empty directly into the Mississippi River. Cedar Fork eventually empties

into Henderson Creek outside the county boundaries.

The county has about 2,500 acres of impounded water. Spoon Lake, which is about

580 acres, is the largest impoundment. Lake Storey and Lake Bracken are the other

major lakes. The rest of the impounded water is primarily in areas that formerly were

surface mined.

Climate

Knox County is cold in winter and quite hot in summer. Occasional cool spells occur

in summer. Precipitation during the winter frequently occurs as snowstorms. During

the warm months, when warm moist air moves in from the south, the precipitation

occurs chiefly in the form of showers, which are often heavy. The total annual rainfall is

normally adequate for corn, soybeans, and small grain.

Table 1 gives data on temperature and precipitation for the survey area as recorded

at Galesburg, Illinois, in the period 1971 to 2000. Table 2 shows probable dates of the

first freeze in fall and the last freeze in spring. Table 3 provides data on length of the

growing season.

In winter, the average temperature is about 25 degrees F and the average daily

minimum temperature is about 17 degrees. The lowest temperature on record, which

occurred at Galesburg on January 10, 1982, is -25 degrees. In summer, the average

temperature is almost 73 degrees and the average daily maximum temperature is

almost 83 degrees. The highest recorded temperature, which occurred on July 22,

1983, is 102 degrees.

Growing degree days are shown in table 1. They are equivalent to “heat units.”

During the month, growing degree days accumulate by the amount that the average

temperature each day exceeds a base temperature (50 degrees F). The normal

monthly accumulation is used to schedule single or successive plantings of a crop

between the last freeze in spring and the first freeze in fall.

The average annual precipitation is about 37 inches. Of this total, about 24 inches,

or about 64 percent, usually falls in April through September. The growing season for

most crops falls within this period. In 2 years out of 10, the rainfall in April through

September is less than 13 inches. The heaviest 1-day rainfall on record was 7.7 inches

at Galesburg on September 8, 1927. Thunderstorms occur on about 50 days each

year.

The average seasonal snowfall is about 26 inches. The heaviest 1-day snowfall

during the period of record was 11 inches at Galesburg on April 11, 1997. On the

average, almost 43 days of the year have at least 1 inch of snow on the ground. The

number of such days varies greatly from year to year.

The average relative humidity in midafternoon is about 60 percent. The sun shines

70 percent of the time possible in summer and 40 percent in winter. The prevailing

wind is from the south. Average windspeed is highest, 12 miles per hour, in spring.

How This Survey Was Made

Soil surveys are updated as part of maintenance projects that are conducted for a

major land resource area (MLRA) or other region. Maintaining and coordinating soil

survey information within a broad area result in uniformly delineated and joined soil

maps and in coordinated interpretations and map unit descriptions for areas that have

similar physiography, climate, and land use.

Updated soil survey information is coordinated within the major land resource area

or other region and meets the standards established and defined in the memorandum
Knox County, Illinois 5

of understanding. Soil surveys that are consistent and uniform within a broad area

enable the coordination of soil management recommendations and a uniform program

application of soil information.

The current survey was made to provide updated information about the soils and

miscellaneous areas in Knox County, which is a subset of MLRA 108B and MLRA

115C (fig. 1). Major land resource areas are geographically associated land resource

units that share a common land use, elevation, topography, climate, water, soils, and

vegetation (USDA, 1981). Map unit design and the detailed soil descriptions are based

on the occurrence of each soil throughout the MLRA.

The information in this survey includes a description of the soils and miscellaneous

areas and their location and a discussion of their properties and the subsequent effects

on suitability, limitations, and management for specified uses.

Soil scientists observed the steepness, length, and shape of the slopes; the general

pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock.

They dug many holes to study the soil profile, which is the sequence of natural layers,

or horizons, in a soil. The profile extends from the surface down into the unconsolidated

material in which the soil formed. The unconsolidated material is devoid of roots and

other living organisms and has not been changed by other biological activity.

The soils and miscellaneous areas in the survey area are in an orderly pattern that is

related to the geology, landforms, relief, climate, and natural vegetation of the area.

Each kind of soil and miscellaneous area is associated with a particular kind or

segment of the landscape. By observing the soils and miscellaneous areas in the

survey area and relating their position to specific segments of the landscape, soil

scientists develop a concept, or model, of how the soils were formed. Thus, during

mapping, this model enables the soil scientists to predict with a considerable degree of

accuracy the kind of soil or miscellaneous area at a specific location on the landscape.

Individual soils on the landscape commonly merge into one another as their

characteristics gradually change. To construct an accurate map, however, soil

scientists must determine the boundaries between the soils. They can observe only a

limited number of soil profiles. Nevertheless, these observations, supplemented by an

understanding of the soil-vegetation-landscape relationship, are sufficient to verify

predictions of the kinds of soil in an area and to determine the boundaries.

Soil scientists recorded the characteristics of the soil profiles that they studied. They

noted soil color, texture, size and shape of soil aggregates, kind and amount of rock

fragments, distribution of plant roots, soil reaction, and other features that enable them

to identify soils. After describing the soils in the survey area and determining their

properties, the soil scientists assigned the soils to taxonomic classes (units).

Taxonomic classes are concepts. Each taxonomic class has a set of soil

characteristics with precisely defined limits. The classes are used as a basis for

comparison to classify soils systematically. Soil taxonomy, the system of taxonomic

classification used in the United States, is based mainly on the kind and character of

soil properties and the arrangement of horizons within the profile (USDA, 1999). After

the soil scientists classified and named the soils in the survey area, they compared the

individual soils with similar soils in the same taxonomic class in other areas so that

they could confirm data and assemble additional data based on experience and

research.

While a soil survey is in progress, samples of some of the soils in the area generally

are collected for laboratory analyses and for engineering tests. Soil scientists interpret

the data from these analyses and tests as well as the field-observed characteristics

and the soil properties to determine the expected behavior of the soils under different

uses. Interpretations for all of the soils are field tested through observation of the soils

in different uses and under different levels of management. Interpretations are

modified as necessary to fit local conditions, and some new interpretations are

developed to meet local needs. Data are assembled from other sources, such as
6

research information, production records, and field experience of specialists. For

example, data on crop yields under defined levels of management are assembled from

farm records and from field or plot experiments on the same kinds of soil.

Predictions about soil behavior are based not only on soil properties but also on

such variables as climate and biological activity. Soil conditions are predictable over

long periods of time, but they are not predictable from year to year. For example, soil

scientists can predict with a fairly high degree of accuracy that a given soil will have a

water table within certain depths in most years, but they cannot predict that the water

table will always be at a specific level in the soil on a specific date.

After soil scientists located and identified the significant natural bodies of soil in the

survey area, they drew the boundaries of these bodies on aerial photographs and

identified each as a specific map unit. Aerial photographs show trees, buildings, fields,

roads, and rivers, all of which help in locating boundaries accurately.

The descriptions, names, and delineations of the soils in this survey area may not

fully agree with those of the soils in adjacent survey areas. Differences are the result

of a better knowledge of soils, modifications in series concepts, or variations in the

intensity of mapping or in the extent of the soils in the survey areas.
7

This section relates the soils in the survey area to the major factors of soil formation

and describes the system of soil classification.

Formation of the Soils

Soil-forming processes act on deposited or accumulated geologic material. The

characteristics of the soil at any given point are determined by the parent material,

living organisms on and in the soil, the climate, the topography, and the length of time

that the forces of soil formation have acted on the soil material (Jenny, 1941).

Climate and living organisms are active factors of soil formation. As they act on the

parent material that has accumulated through the weathering of rocks and that may

have been relocated by water, glaciers, or wind, they slowly change the material into a

natural body that has genetically related horizons. The effects of climate and living

organisms are conditioned by topography. The parent material affects the kind of soil

profile that forms. Finally, time is needed for changing the parent material into a soil.

Usually, a long time is needed for the formation of distinct horizons. The importance of

each factor differs from place to place, and each modifies the effect of the other four. In

some areas one factor dominates the formation of a soil. Human activities, such as

clearing forests, cultivating, and applying fertilizer, also affect soil formation.

Parent Material

Parent material is the geologic material in which a soil forms. Most of the parent

materials in Knox County are a direct result of glaciers and sediments of the

Wisconsinan and Illinoian Stages (Willman and Frye, 1970). Although the parent

materials are all of glacial origin, their properties vary greatly, depending on the

method of deposition. The dominant parent materials in the county are till, outwash,

alluvium, and loess. In dissected areas where the overlying deposits have been

removed, the soils formed in material weathered from shale and siltstone. In recent

times surface mining has created a new parent material.

Till is material laid down directly by glaciers with a minimum of water action. It

consists of particles of different sizes mixed together. The small pebbles in till generally

have distinct edges and corners, indicating that they have not been subject to intense

washing by water. The till in Knox County was deposited during the Illinoian Stage. It is

generally loam or clay loam. Soils that formed in this material generally are on strongly

sloping to very steep side slopes. Hickory soils are examples.

In some areas a very firm layer that has a higher content of clay is in the upper few

feet of the Illinoian till. This layer is a paleosol, which formed during the Sangamonian

Stage, between the Illinoian and Wisconsinan Stages (Willman and Frye, 1970).

During the Sangamonian Stage, the till was the surface deposit. It was subject to soilforming processes. During the Wisconsinan Stage, these soils were buried by loess

deposits. Atlas and Assumption soils are examples of soils that formed in a thin layer

of loess and in the underlying till that has a paleosol.

Loess was deposited directly by the wind. It consists of very uniform, calcareous,

silt-sized particles. In Knox County the major source of this loess was the Mississippi

Formation and Classification of

the Soils
8 Soil Survey of

River Valley, although many smaller streams also could have been sources. These

sediments were exposed to the wind when rivers swollen with glacial meltwater from

the Wisconsinan glaciers dried seasonally and the glaciers retreated. Since the

sediments in the river valleys were exposed, the predominantly northeasterly winds

picked up the loess and transported it many miles. The loess covered the Illinoian till in

a relatively uniform layer. In Knox County the loess ranges from 7 to 16 feet in

thickness, becoming thinner from the northeast to the southwest (Wascher and others,

1971). Most of the upland soils in the county formed in loess. Examples are Fayette,

Ipava, Osco, and Sable soils.

Outwash was deposited by running water from melting glaciers. The size of the

particles that make up outwash varies according to the speed of the streams that

carried them. When the water slowed down, the coarser textured material was

deposited first. The finer particles were carried a greater distance by more slowly

moving water. Outwash deposits in Knox County generally occur as layers of loamy

sand, sandy loam, and loam. Most of the areas of outwash have been covered by

loess. Camden and Harvard soils are examples of soils that formed in loess and in the

underlying outwash. They are predominantly in the valley along the Spoon River,

where waterflow has been concentrated.

In some areas, outwash has been reworked and translocated by the wind after the

initial deposition. These areas are on side slopes in the major river valleys. Alvin soils

are examples of soils that formed in sandy windblown material.

Alluvial sediments were deposited mainly during periods of stream overflow. They

generally have a silty texture; this texture indicates that uplands were the source of the

sediments. The alluvial areas are throughout the county. Their width ranges from 11

/2

miles along the Spoon River to less than 1/8 mile along the minor streams. In some

areas the sediments have buried horizons of darker soil material.

Pennsylvanian shale, sandstone, and siltstone underlie most of the unconsolidated

deposits throughout the county (Piskin and Bergstrom, 1975). The thickness of the

overlying glacial and alluvial deposits ranges from 200 feet in ancient valleys to less

than 1 foot on upland side slopes along the major drainageways where erosion has

been intense. In places sandstone is at the top of the bedrock sequence. The shale

commonly is relatively soft and can be penetrated with a shovel. It is generally silt

loam or silty clay loam and commonly is calcareous (fig. 3). Soils that formed in

material weathered from shale are weakly developed. Marseilles soils are examples.

Mine spoil is mixed and reworked overburden material deposited in the surfacemined areas. It is a heterogeneous mixture of till, loess, shale, and siltstone. In some

areas layers of replaced soil material overlie the mixed material. The soil material is

loam, silt loam, silty clay loam, or clay loam; generally, it is firm or very firm.

Commonly, it is calcareous directly below the surface layer. Lenzburg and Rapatee

soils formed in the spoil.

Living Organisms

Plants are the principal living organisms affecting the formation of the soils in Knox

County. Bacteria, fungi, and earthworms, however, also have affected soil formation.

The chief contribution of plant and animal life is the addition of organic matter and

nitrogen to the soil. The kind of organic material on and in the soil depends on the kind

of plants that grew on the soil. The remains of these plants accumulate in the surface

layer, decay, and eventually become organic matter. The roots of the plants provide

channels for the downward movement of water through the soil and add organic matter

as they decay. Bacteria in the soil help to break down the organic matter and thus help

to provide plant nutrients.

The native vegetation in the county was trees and prairie grasses. The sloping soils

formed mainly under forests of oak, hickory, and similar trees. The nearly level soils
Knox County, Illinois 9

formed under prairie grasses. These soils have a darker and thicker surface layer than

that of the soils that formed under forest vegetation. Also, they have a higher content of

organic matter. Fayette soils are examples of soils that formed under forest vegetation.

Ipava soils are examples of soils that formed under prairie vegetation.

Climate

Climate is an important factor in the formation of soils. It influences the kind of plant

and animal life on and in the soil. Precipitation affects the weathering of minerals and

the transporting of soil material. Temperature determines the rate of chemical reaction

that occurs in the soil. The general climate has had an important overall influence on

the characteristics of the soils, but it does not cause major differences among soils in

a relatively small area, such as a county.

The climate in Knox County is temperate and humid. It is probably similar to the

climate under which the soils formed.

Topography

Topography, or relief, has a marked influence on the soils through its effect on

natural drainage, erosion, plant cover, and soil temperature. In Knox County, the

Figure 3.—Loess and till overlying soft, calcareous shale bedrock.
10 Soil Survey of

slopes dominantly range from 0 to 60 percent. Natural soil drainage ranges from well

drained on upland ridgetops to very poorly drained in depressions.

Topography influences the formation of soils by affecting runoff and drainage.

Drainage in turn, through its effect on aeration of the soils, determines the color of the

soil. Runoff is most rapid on the steeper slopes, but in low areas, water is temporarily

ponded. Water and air move freely through well drained soils but slowly through poorly

drained soils. In well aerated soils, the iron compounds that give most soils their color

are brightly colored. In poorly aerated soils, the colors are gleyed and mottled. Fayette

soils are examples of well drained, well aerated soils. Sable soils are examples of

poorly drained, poorly aerated soils.

Time

The length of time needed for the formation of a soil depends on the other factors of

soil formation. Differences in the length of time that the parent materials have been in

place are commonly reflected in the degree of profile development. Soils form more

rapidly and are more acid if the parent material is low in the content of calcium (lime).

The more rapidly permeable soils form more readily than slowly permeable soils

because calcium and other soluble minerals are leached more quickly. Soils form more

quickly under forest vegetation than under prairie vegetation because grasses are

more efficient in recycling calcium and other bases from the subsoil to the surface

layer. Soils generally form more quickly in a humid climate than in a dry climate.

The soils in Knox County range from young to mature. Most of the soils on uplands

are moderately developed. The soils in the northern part of the county and on terraces

are weakly developed.

Classification of the Soils

The system of soil classification used by the National Cooperative Soil Survey has

six categories (Soil Survey Staff, 1998 and 1999). Beginning with the broadest, these

categories are the order, suborder, great group, subgroup, family, and series.

Classification is based on soil properties observed in the field or inferred from those

observations or from laboratory measurements. The categories are defined in the

following paragraphs.

ORDER. Twelve soil orders are recognized. The differences among orders reflect

the dominant soil-forming processes and the degree of soil formation. Each order is

identified by a word ending in sol. An example is Mollisol.

SUBORDER. Each order is divided into suborders primarily on the basis of

properties that influence soil genesis and are important to plant growth or properties

that reflect the most important variables within the orders. The last syllable in the name

of a suborder indicates the order. An example is Aquoll (Aqu, meaning water, plus oll,

from Mollisol).

GREAT GROUP. Each suborder is divided into great groups on the basis of close

similarities in kind, arrangement, and degree of development of pedogenic horizons;

soil moisture and temperature regimes; type of saturation; and base status. Each great

group is identified by the name of a suborder and by a prefix that indicates a property

of the soil. An example is Endoaquolls (Endo, meaning within, plus aquoll, the

suborder of the Mollisols that has an aquic moisture regime).

SUBGROUP. Each great group has a typic subgroup. Other subgroups are

intergrades or extragrades. The typic subgroup is the central concept of the great

group; it is not necessarily the most extensive. Intergrades are transitions to other

orders, suborders, or great groups. Extragrades have some properties that are not

representative of the great group but do not indicate transitions to any other taxonomic

class. Each subgroup is identified by one or more adjectives preceding the name of
Knox County, Illinois 11

the great group. The adjective Typic identifies the subgroup that typifies the great group.

An example is Typic Endoaquolls.

FAMILY. Families are established within a subgroup on the basis of physical and

chemical properties and other characteristics that affect management. Generally, the

properties are those of horizons below plow depth where there is much biological

activity. Among the properties and characteristics considered are particle-size class,

mineralogy class, cation-exchange activity class, soil temperature regime, soil depth,

and reaction class. A family name consists of the name of a subgroup preceded by

terms that indicate soil properties. An example is fine-silty, mixed, superactive, mesic

Typic Endoaquolls.

SERIES. The series consists of soils within a family that have horizons similar in

color, texture, structure, reaction, consistence, mineral and chemical composition, and

arrangement in the profile. The Sable series is a soil series in this survey area.

Table 4 indicates the order, suborder, great group, subgroup, and family of the soil

series in the survey area.

13

In this section, arranged in alphabetical order, each soil series recognized in the

survey area is described. Each series description is followed by descriptions of the

associated detailed soil map units.

Characteristics of the soil and the material in which it formed are identified for each

soil series. A pedon, a small three-dimensional area of soil, that is typical of the series

in the survey area is described. The detailed description of each soil horizon follows

standards in the “Soil Survey Manual” (Soil Survey Division Staff, 1993). Many of the

technical terms used in the descriptions are defined in “Soil Taxonomy” (Soil Survey

Staff, 1999) and in “Keys to Soil Taxonomy” (Soil Survey Staff, 1998). Unless otherwise

stated, colors in the descriptions are for moist soil. Following the pedon description is

the range of important characteristics of the soils in the series.

The map units on the detailed soil maps in this survey represent the soils or

miscellaneous areas in the survey area. The map unit descriptions in this section,

along with the maps, can be used to determine the suitability and potential of a unit for

specific uses. They also can be used to plan the management needed for those uses.

More information about each map unit is given under the headings “Use and

Management of the Soils” and “Soil Properties.”

A map unit delineation on a soil map represents an area dominated by one or more

major kinds of soil or miscellaneous areas. A map unit is identified and named

according to the taxonomic classification of the dominant soils. Within a taxonomic

class there are precisely defined limits for the properties of the soils. On the

landscape, however, the soils are natural phenomena, and they have the characteristic

variability of all natural phenomena. Thus, the range of some observed properties may

extend beyond the limits defined for a taxonomic class. Areas of soils of a single

taxonomic class rarely, if ever, can be mapped without including areas of other

taxonomic classes. Consequently, every map unit is made up of the soils or

miscellaneous areas for which it is named and some minor components that belong to

taxonomic classes other than those of the major soils.

Most minor soils have properties similar to those of the dominant soil or soils in the

map unit, and thus they do not affect use and management. These are called

noncontrasting, or similar, components. They may or may not be mentioned in a

particular map unit description. Other minor components, however, have properties

and behavioral characteristics divergent enough to affect use or to require different

management. These are called contrasting, or dissimilar, components. They generally

are in small areas and could not be mapped separately because of the scale used.

Some small areas of strongly contrasting soils or miscellaneous areas are identified by

a special symbol on the maps. The contrasting components are mentioned in the map

unit descriptions. A few areas of minor components may not have been observed, and

consequently they are not mentioned in the descriptions, especially where the pattern

was so complex that it was impractical to make enough observations to identify all the

soils and miscellaneous areas on the landscape.

The presence of minor components in a map unit in no way diminishes the

usefulness or accuracy of the data. The objective of mapping is not to delineate pure

taxonomic classes but rather to separate the landscape into landforms or landform

Soil Series and Detailed Soil Map

Units
14 Soil Survey of

segments that have similar use and management requirements. The delineation of

such segments on the map provides sufficient information for the development of

resource plans. If intensive use of small areas is planned, however, onsite investigation

is needed to define and locate the soils and miscellaneous areas.

An identifying symbol precedes the map unit name in the map unit descriptions.

Each description includes general facts about the unit and gives the principal hazards

and limitations to be considered in planning for specific uses.

Soils that have profiles that are almost alike make up a soil series. Except for

differences in texture of the surface layer, all the soils of a series have major horizons

that are similar in composition, thickness, and arrangement.

Soils of one series can differ in texture of the surface layer, slope, stoniness,

salinity, degree of erosion, and other characteristics that affect their use. On the basis

of such differences, a soil series is divided into soil phases. Most of the areas shown

on the detailed soil maps are phases of soil series. The name of a soil phase

commonly indicates a feature that affects use or management. For example, Hickory

silt loam, 10 to 18 percent slopes, eroded, is a phase of the Hickory series.

A map unit is named for the component or components that make up a dominant

percentage of the map unit. Many map units consist of one dominant component.

These map units are consociations. Sable silty clay loam, 0 to 2 percent slopes, is an

example.

Some map units are made up of two or more dominant components. These map

units are called complexes. A complex consists of two or more components in such an

intricate pattern or in such small areas that they cannot be shown separately on the

maps. The components of a complex cannot be mapped separately at the scale of

mapping. Attempting to delineate the individual components of a complex would result

in excessive clutter that could make the map illegible. The pattern and proportion of

the components in a complex are somewhat similar in all areas. Ipava-Sable complex,

0 to 2 percent slopes, is an example.

This survey includes miscellaneous areas. Such areas have little or no soil material

and support little or no vegetation. Pits, gravel, is an example.

Table 5 gives the acreage and proportionate extent of each map unit. Other tables

(see Contents) give properties of the soils and the limitations, capabilities, and

potentials for many uses. The Glossary defines many of the terms used in describing

the soils or miscellaneous areas.

Alvin Series

Taxonomic classification: Coarse-loamy, mixed, superactive, mesic Typic Hapludalfs

Typical Pedon

Alvin fine sandy loam, 1 to 5 percent slopes, at an elevation of about 660 feet;

Vermilion County, Illinois; about 2,320 feet south and 1,760 feet east of the northwest

corner of sec. 32, T. 21 N., R. 11 W.; USGS Danville NE topographic quadrangle; lat.

40 degrees 14 minutes 08 seconds N. and long. 87 degrees 36 minutes 58 seconds W.,

NAD 27:

Ap—0 to 8 inches; brown (10YR 4/3) fine sandy loam, light brownish gray (10YR 6/2)

dry; weak fine granular structure; very friable; moderately acid; abrupt smooth

boundary.

BE—8 to 11 inches; dark yellowish brown (10YR 4/4) fine sandy loam; weak fine

subangular blocky structure; very friable; few distinct grayish brown (10YR 5/2) silt

coatings on faces of peds; moderately acid; clear smooth boundary.

Bt1—11 to 15 inches; dark yellowish brown (10YR 4/4) fine sandy loam; moderate fine
Knox County, Illinois 15

subangular blocky structure; friable; few distinct brown (10YR 4/3) clay films on

faces of peds; moderately acid; clear smooth boundary.

Bt2—15 to 25 inches; dark yellowish brown (10YR 4/4) fine sandy loam; moderate

medium subangular blocky structure; friable; common distinct brown (10YR 4/3)

clay films on faces of peds; strongly acid; clear smooth boundary.

E and Bt—25 to 74 inches; yellowish brown (10YR 5/4) loamy fine sand (E); weak

medium subangular blocky structure; very friable; dark yellowish brown (10YR 4/6)

fine sandy loam (Bt); 3 to 10 percent of volume; occurs as common or many thin

lamellae; moderate medium subangular blocky structure; friable; common distinct

brown (10YR 4/3) clay films on faces of peds; strongly acid; clear smooth

boundary.

C—74 to 80 inches; 80 percent brown (10YR 4/3) and 20 percent yellowish brown

(10YR 5/6), stratified fine sandy loam; massive; friable; moderately acid.

Range in Characteristics

Depth to the base of the diagnostic horizon: 40 to more than 80 inches

Ap or A horizon:

Hue—10YR

Value—3 or 4; value of 3 where the A horizon is less than 6 inches thick

Chroma—1 to 4

Texture—fine sandy loam, sandy loam, or very fine sandy loam

E, EB, or BE horizon (if it occurs):

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—2 to 4

Texture—very fine sandy loam, fine sandy loam, sandy loam, or loamy fine sand

Bt horizon:

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—3 to 6

Texture—very fine sandy loam, loam, fine sandy loam, or sandy loam; includes

thin layers of sandy clay loam

E part of E and Bt or Bt and E horizon:

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—2 to 6

Texture—sandy loam, loamy sand, or sand or the fine or very fine analogs of

these textures

Bt part of E and Bt or Bt and E horizon:

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—3 to 6

Texture—sandy loam, fine sandy loam, very fine sandy loam, loamy sand, fine

loamy sand, very fine loamy sand, or loam

BC or C horizon:

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—3 to 6

Texture—sandy loam, loamy sand, or sand or the fine or very fine analogs of

these textures
16 Soil Survey of

131B—Alvin sandy loam, 2 to 5 percent slopes

Setting

Landform: Terraces, hills, and dunes

Position on the landform: Shoulders and summits

Map Unit Composition

Alvin and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner subsoil than that of the Alvin soil and contain less clay

• Soils underlain by material containing more silt and less clay than that underlying the

Alvin soil

• Soils that have a thicker and darker surface layer than that of the Alvin soil

• Soils that have slopes of more than 5 percent

Dissimilar soils:

• Soils that have a darker surface layer than that of the Alvin soil and have a seasonal

high water table within 6 feet of the surface

Properties and Qualities of the Alvin Soil

Parent material: Eolian and alluvial loamy and sandy materials

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderately rapid

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.9 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Low

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Low for steel and moderate for concrete

Surface runoff class: Very low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Moderately high

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

131D—Alvin sandy loam, 10 to 18 percent slopes

Setting

Landform: Terraces, hills, and dunes

Position on the landform: Shoulders and backslopes

Map Unit Composition

Alvin and similar soils: 90 percent

Dissimilar soils: 10 percent
Knox County, Illinois 17

Minor Components

Similar soils:

• Soils that have a thinner subsoil than that of the Alvin soil and contain less clay

• Soils underlain by material containing more silt and less sand than that underlying

the Alvin soil

• Soils underlain by till

Dissimilar soils:

• The moderately well drained Elco soils in positions similar to those of the Alvin soil

Properties and Qualities of the Alvin Soil

Parent material: Eolian and alluvial loamy and sandy materials

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderately rapid

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.8 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Low

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Low for steel and high for concrete

Surface runoff class: Low

Susceptibility to water erosion: High

Susceptibility to wind erosion: Moderately high

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

131F—Alvin sandy loam, 18 to 35 percent slopes

Setting

Landform: Dunes, hills, and terraces

Position on the landform: Backslopes

Map Unit Composition

Alvin and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner subsoil than that of the Alvin soil and contain less clay

• Soils underlain by material containing more silt and less sand than that underlying

the Alvin soil

Dissimilar soils:

• The moderately well drained Elco soils in positions similar to those of the Alvin soil

Properties and Qualities of the Alvin Soil

Parent material: Eolian and alluvial loamy and sandy materials

Drainage class: Well drained
18 Soil Survey of

Slowest permeability within a depth of 40 inches: Moderately rapid

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.9 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Low

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Low for steel and high for concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Moderately high

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Assumption Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Mollic Oxyaquic

Hapludalfs

Taxadjunct features: The Assumption soils in this survey area have a thinner dark

surface layer than is defined as the range for the series. This difference, however,

does not significantly affect the use and management of the soils.

Typical Pedon

Assumption silt loam, 2 to 5 percent slopes, at an elevation of 720 feet; Henry County,

Illinois; 100 feet north and 300 feet east of the southwest corner of sec. 29, T. 15 N., R.

2 E.; USGS Andover topographic quadrangle; lat. 41 degrees 15 minutes 00 seconds

N. and long. 90 degrees 17 minutes 57 seconds W., NAD 27:

Ap—0 to 6 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; weak medium granular structure; friable; many fine roots throughout;

neutral; abrupt smooth boundary.

A—6 to 13 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate medium granular structure; friable; many fine roots throughout;

slightly acid; clear smooth boundary.

AB—13 to 16 inches; very dark grayish brown (10YR 3/2) silt loam mixed with some

brown (10YR 4/3) in the lower 2 inches, grayish brown (10YR 5/2) and brown

(10YR 5/3) dry; weak medium subangular blocky structure; friable; many fine roots

throughout; neutral; clear wavy boundary.

Bt1—16 to 26 inches; brown (10YR 4/3) silty clay loam; weak medium prismatic

structure parting to moderate fine subangular blocky; firm; common fine roots

between peds; many faint brown (10YR 5/3) clay films on faces of peds; slightly

acid; clear wavy boundary.

Bt2—26 to 35 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate medium subangular blocky; firm; common fine roots

between peds; many faint brown (10YR 4/3) clay films on faces of peds; many

medium distinct brownish yellow (10YR 6/6) masses of iron accumulation and

common faint grayish brown (2.5Y 5/2) iron depletions in the matrix; slightly acid;

abrupt wavy boundary.
Knox County, Illinois 19

2Bt3—35 to 51 inches; yellowish brown (10YR 5/4) clay loam; weak medium subangular

blocky structure; firm; common fine roots between peds; common faint dark

yellowish brown (10YR 4/4) clay films on faces of peds; many coarse prominent

yellowish brown (10YR 5/8) masses of iron accumulation; common medium

prominent light olive gray (5Y 6/2) iron depletions; slightly acid; clear wavy

boundary.

2Bt4—51 to 60 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate medium subangular blocky; firm; common fine roots

between peds; many faint brown (10YR 4/3) clay films on faces of peds; many

medium distinct brownish yellow (10YR 6/6) masses of iron accumulation; slightly

acid; clear wavy boundary.

2C—60 to 80 inches; brown (10YR 5/3) clay loam; massive; firm; common coarse faint

grayish brown (2.5Y 5/2) iron depletions and common coarse faint brown (7.5YR

4/4) masses of iron accumulations in the matrix; slightly effervescent; slightly

alkaline.

Range in Characteristics

Thickness of the loess: 20 to 40 inches

Thickness of the solum: 48 to more than 70 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—silt loam or silty clay loam

Reaction—moderately acid to neutral

Bt horizon:

Hue—10YR or 2.5Y

Value—4 or 5

Chroma—2 to 6

Texture—silty clay loam or silt loam

Reaction—strongly acid to neutral

2Btg or 2Bt horizon:

Hue—7.5YR, 10YR, 2.5Y, or 5Y

Value—3 to 6

Chroma—1 to 6

Texture—clay loam, silty clay loam, loam, clay, or silty clay

Reaction—strongly acid to neutral

2C or 2Cg horizon:

Hue—7.5YR, 10YR, 2.5Y, or 5Y

Value—3 to 6

Chroma—1 to 6

Texture—clay loam, silty clay loam, loam, clay, or silty clay

Reaction—slightly acid to moderately alkaline

259C2—Assumption silt loam, 5 to 10 percent slopes,

eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes
20 Soil Survey of

Map Unit Composition

Assumption and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Assumption

soil

• Soils that formed entirely in loess or entirely in loamy till

• Soils in which the loess is less than 20 inches thick

• Soils in which the lower part of the loess mantle above the till is calcareous

Dissimilar soils:

• The poorly drained Coatsburg soils in positions similar to those of the Assumption

soil

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Assumption Soil

Parent material: Loess over a paleosol that formed in till

Drainage class: Moderately well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Moderately slow or slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.6 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: 2 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

259D2—Assumption silt loam, 10 to 18 percent slopes,

eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Assumption and similar soils: 97 percent

Dissimilar soils: 3 percent
Knox County, Illinois 21

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Assumption

soil

• Soils that formed entirely in loess or entirely in loamy till

• Soils in which the loess is less than 20 inches thick

• Soils in which the lower part of the loess mantle above the till is calcareous

Dissimilar soils:

• The poorly drained Coatsburg soils in positions similar to those of the Assumption

soil

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Assumption Soil

Parent material: Loess over a paleosol that formed in till

Drainage class: Moderately well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Slow or moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.3 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: 2 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

259D3—Assumption silty clay loam, 10 to 18 percent

slopes, severely eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders, backslopes

Map Unit Composition

Assumption and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Assumption

soil
22 Soil Survey of

• Soils that formed entirely in loess or entirely in loamy till

• Soils in which the loess is less than 20 inches thick

• Soils in which the lower part of the loess mantle above the till is calcareous

Dissimilar soils:

• The poorly drained Coatsburg soils in positions similar to those of the Assumption

soil

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Assumption Soil

Parent material: Loess over a paleosol that formed in till

Drainage class: Moderately well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Slow or moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.8 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: 2 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Atlas Series

Taxonomic classification: Fine, smectitic, mesic Aeric Chromic Vertic Epiaqualfs

Typical Pedon

Atlas silt loam, 5 to 10 percent slopes, eroded, at an elevation of 665 feet; Adams

County, Illinois; 1,200 feet west and 50 feet south of the northeast corner of sec. 7, T. 1

N., R. 6 W.; USGS Coatsburg topographic quadrangle; lat. 40 degrees 05 minutes 40

seconds N. and long. 91 degrees 07 minutes 52 seconds W., NAD 27:

Ap—0 to 7 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR

6/2) dry; weak fine granular structure; friable; common very fine and fine roots;

common medium prominent strong brown (7.5YR 5/8) and few fine distinct

yellowish brown (10YR 5/6) masses of iron throughout; few fine prominent black

(2.5Y 2.5/1) masses of iron and manganese throughout; slightly acid; clear smooth

boundary.

BE—7 to 13 inches; brown (10YR 5/3) silty clay loam, light brownish gray (10YR 6/2)

dry; weak medium subangular blocky structure; friable; common fine roots; few fine

distinct light brownish gray (10YR 6/2) clay depletions throughout; few fine distinct
Knox County, Illinois 23

yellowish brown (10YR 5/6) masses of iron throughout; slightly acid; clear wavy

boundary.

2Btg1—13 to 26 inches; dark gray (10YR 4/1) silty clay loam; moderate thick platy

structure parting to weak fine subangular blocky; firm; common fine and few

medium roots; common distinct very dark gray (10YR 3/1) organo-clay films on

faces of peds and in pores; few fine prominent yellowish brown (10YR 5/6) masses

of iron and few fine distinct white (10YR 8/1) masses of barite throughout;

moderately acid; clear wavy boundary.

2Btg2—26 to 37 inches; 87 percent dark gray (10YR 4/1) and 10 percent gray (10YR

5/1) silty clay; weak medium prismatic structure; firm; common fine and medium

roots; few distinct very dark gray (10YR 3/1) organo-clay films on faces of peds

and in pores; common fine prominent yellowish brown (10YR 5/6) masses of iron

and few fine distinct white (10YR 8/1) masses of barite throughout; 1 percent

rounded gravel and 1 percent subangular limestone-cherty gravel; neutral; clear

wavy boundary.

2Btg3—37 to 47 inches; gray (2.5Y 5/1) silty clay; weak coarse prismatic structure;

firm; common fine roots; few distinct very dark gray (10YR 3/1) organo-clay films

on faces of peds and in pores; few fine prominent yellowish brown (10YR 5/6)

masses of iron throughout and few fine faint gray (10YR 6/1) iron depletions and

few fine distinct white (10YR 8/1) masses of barite throughout; 1 percent angular

gravel; neutral; clear wavy boundary.

2Btg4—47 to 61 inches; gray (2.5Y 5/1) clay loam; weak coarse prismatic structure;

firm; common very fine roots; few distinct very dark gray (10YR 3/1) organo-clay

films on faces of peds and in pores; few fine distinct black (2.5Y 2.5/1) masses of

iron and manganese and few fine distinct white (10YR 8/1) barite crystals

throughout; 1 percent limestone-cherty gravel and 1 percent rounded igneousgranite gravel; neutral; clear wavy boundary.

2BCg—61 to 80 inches; light brownish gray (2.5Y 6/2) clay loam; weak coarse

prismatic structure; firm; few fine distinct yellowish brown (10YR 5/6) and common

medium prominent brownish yellow (10YR 6/8) masses of iron throughout; 2

percent limestone-cherty gravel; neutral.

Range in Characteristics

Depth to the base of the argillic horizon: More than 42 inches

Ap or A horizon:

Hue—10YR

Value—2 to 5

Chroma—1 to 4

Texture—silt loam, loam, silty clay loam, or clay loam

E or BE horizon:

Hue—10YR

Value—4 or 5

Chroma—1 to 4

Texture—silt loam or silty clay loam

Bt, Btg, or 2Btg horizon:

Hue—10YR, 2.5Y, 5Y, or N

Value—4 to 6

Chroma—0 to 3

Texture—clay loam, clay, silty clay loam, or silty clay

Content of rock fragments—0 to 5 percent
24 Soil Survey of

2Cg horizon (if it occurs):

Hue—10YR, 7.5YR, 5Y, or N

Value—4 to 6

Chroma—0 to 6

Texture—silty clay loam, clay loam, or loam

Content of rock fragments—2 to 15 percent

7D3—Atlas silty clay loam, 10 to 18 percent slopes,

severely eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Atlas and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Atlas soil

• Soils that have slopes of less than 10 percent

Dissimilar soils:

• The moderately well drained Elco soils in positions similar to those of the Atlas soil

• The well drained Hickory soils on the lower backslopes

Properties and Qualities of the Atlas Soil

Parent material: Paleosol that formed in till

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Very slow

Permeability below a depth of 60 inches: Very slow or slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 7.9 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: 0.5 foot, January

through May

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Very high

Susceptibility to water erosion: High

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 25

Camden Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Hapludalfs

Typical Pedon

Camden silt loam, 0 to 2 percent slopes, at an elevation of 560 feet; Bureau County,

Illinois; 1,280 feet west and 1,740 feet south of the northeast corner of sec. 12, T. 15

N., R. 8 E.; USGS Wyanet topographic quadrangle; lat. 41 degrees 18 minutes 05

seconds N. and long. 89 degrees 30 minutes 52 seconds W., NAD 27:

Ap—0 to 7 inches; brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; moderate

fine granular structure; friable; few fine roots; slightly acid; abrupt smooth

boundary.

E—7 to 12 inches; yellowish brown (10YR 5/4) silt loam; weak medium platy structure

parting to weak fine subangular blocky; friable; few fine roots; neutral; clear smooth

boundary.

Bt1—12 to 18 inches; yellowish brown (10YR 5/6) silty clay loam; moderate fine

subangular blocky structure; friable; few fine roots; common distinct yellowish

brown (10YR 5/4) clay films on faces of peds; neutral; clear smooth boundary.

Bt2—18 to 26 inches; yellowish brown (10YR 5/6) silty clay loam; moderate medium

prismatic structure parting to moderate medium subangular blocky; friable; few fine

roots; many distinct dark yellowish brown (10YR 4/4) clay films on faces of peds;

moderately acid; clear smooth boundary.

2Bt3—26 to 34 inches; yellowish brown (10YR 5/6) clay loam; weak medium prismatic

structure parting to moderate medium subangular blocky; friable; few fine roots;

many distinct dark yellowish brown (10YR 4/4) clay films on faces of peds;

moderately acid; clear smooth boundary.

2Bt4—34 to 37 inches; strong brown (7.5YR 5/6) clay loam; weak medium subangular

blocky structure; friable; few fine roots; many distinct brown (7.5YR 4/4) clay films

on faces of peds; about 7 percent gravel; slightly acid; clear smooth boundary.

2Bt5—37 to 48 inches; strong brown (7.5YR 5/6) sandy clay loam; 1-inch strata of

yellowish brown (10YR 5/6) sandy loam; weak medium subangular blocky

structure; friable; common distinct brown (7.5YR 4/4) clay films on faces of peds;

about 5 percent gravel; slightly acid; clear smooth boundary.

2Bt6—48 to 53 inches; strong brown (7.5YR 5/6) sandy loam; weak medium

subangular blocky structure; friable; common distinct brown (7.5YR 4/4) clay films

bridging sand grains; about 2 percent gravel; neutral; clear wavy boundary.

2C—53 to 60 inches; brown (7.5YR 4/4) sandy loam that has thin strata of loamy sand;

single grain; loose; about 5 percent gravel; neutral.

Range in Characteristics

Thickness of the loess: 24 to 40 inches

Depth to the base of the diagnostic horizon: 30 to 65 inches

Ap or A horizon:

Hue—10YR

Value—3 to 5; value of 3 where the horizon is less than 6 inches thick

Chroma—2 or 3

Texture—silt loam

E horizon:

Hue—10YR

Value—4 to 6
26 Soil Survey of

Chroma—2 to 4

Texture—silt loam

Bt horizon:

Hue—10YR or 7.5YR

Value—4 or 5

Chroma—3 to 6

Texture—silty clay loam or silt loam

2Bt or 2BC horizon:

Hue—10YR, 7.5YR, or 2.5Y

Value—4 to 6

Chroma—3 to 6

Texture—silty clay loam, clay loam, loam, sandy loam, sandy clay loam, or silt

loam

Content of rock fragments—0 to 10 percent

2C horizon:

Hue—10YR or 7.5YR

Value—4 to 6

Chroma—3 to 6

Texture—stratified sandy loam, loam, silt loam, loamy sand, sandy clay loam, and

clay loam

Content of rock fragments—0 to 10 percent

134B—Camden silt loam, 2 to 5 percent slopes

Setting

Landform: Outwash plains

Position on the landform: Summits

Map Unit Composition

Camden and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Camden soil

• Soils that have slopes of less than 2 percent

• Soils that have a seasonal high water table within a depth of 6 feet

Dissimilar soils:

• Poorly drained, nearly level or depressional soils

Properties and Qualities of the Camden Soil

Parent material: Loess and outwash

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate or moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None
Knox County, Illinois 27

Potential for frost action: High

Hazard of corrosion: Low for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

134C2—Camden silt loam, 5 to 10 percent slopes, eroded

Setting

Landform: Stream terraces and outwash plains

Position on the landform: Shoulders and backslopes

Map Unit Composition

Camden and similar soils: 97 percent

Dissimilar soils: 3 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Camden soil

• Soils that have a seasonal high water table within a depth of 6 feet

• Soils that have more clay in the surface layer than the Camden soil

• Soils that formed entirely in loess

Dissimilar soils:

• The somewhat poorly drained Virgil soils on summits or in low areas

Properties and Qualities of the Camden Soil

Parent material: Loess and outwash

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 9.4 inches

Content of organic matter in the surface layer: 1.0 to 2.5 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
28 Soil Survey of

134D2—Camden silt loam, 10 to 18 percent slopes,

eroded

Setting

Landform: Stream terraces and outwash plains

Position on the landform: Backslopes and shoulders

Map Unit Composition

Camden and similar soils: 97 percent

Dissimilar soils: 3 percent

Minor Components

Similar soils:

• Soils that have a seasonal high water table within a depth of 6 feet

• Soils that have slopes of more than 18 percent

• Soils in which the loess mantle is less than 20 inches thick over the loamy material

Dissimilar soils:

• The moderately well drained Elco soils in positions similar to those of the Camden soil

Properties and Qualities of the Camden Soil

Parent material: Loess and outwash

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 9.4 inches

Content of organic matter in the surface layer: 1.0 to 2.5 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: Low for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Clarksdale Series

Taxonomic classification: Fine, smectitic, mesic Udollic Endoaqualfs

Typical Pedon

Clarksdale silt loam, 0 to 2 percent slopes, at an elevation of 650 feet; Adams County,

Illinois; 800 feet south and 550 feet east of the northwest corner of sec. 16, T. 2 N., R.

7 W.; USGS Lorraine topographic quadrangle; lat. 40 degrees 09 minutes 55 seconds N.

and long. 91 degrees 13 minutes 18 seconds W., NAD 27:
Knox County, Illinois 29

Ap—0 to 8 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; weak thin platy structure parting to weak fine subangular blocky; friable;

common fine roots throughout; neutral; abrupt smooth boundary.

E—8 to 12 inches; dark grayish brown (10YR 4/2) silt loam; moderate medium platy

structure parting to weak fine subangular blocky; friable; common very fine and

fine roots throughout; many faint very dark grayish brown (10YR 3/2) organic coats

on faces of peds and in pores; few fine prominent yellowish brown (10YR 5/6) iron

concentrations lining root channels and/or pores; few fine distinct black (2.5Y

2.5/1) masses of iron and manganese throughout; many fine distinct light gray

(10YR 7/1 and 7/2) clay depletions between peds; neutral; clear smooth boundary.

BE—12 to 16 inches; grayish brown (10YR 5/2) silt loam; moderate fine subangular

blocky structure; friable; few fine roots throughout; common faint very dark grayish

brown (10YR 3/2) organo-clay films on faces of peds and in pores; few fine

prominent black (2.5Y 2.5/1) masses of iron and manganese throughout; common

fine prominent yellowish brown (10YR 5/6) masses of iron throughout; common

fine faint light gray (10YR 7/1) clay depletions between peds; moderately acid;

clear smooth boundary.

Bt1—16 to 23 inches; brown (10YR 5/3) silty clay loam; moderate medium prismatic

structure parting to moderate medium subangular blocky; firm; few very fine and

fine roots throughout; many faint dark grayish brown (10YR 4/2) clay films on faces

of peds and many distinct very dark gray (10YR 3/1) organo-clay films on faces of

peds and in pores; common fine prominent black (2.5Y 2.5/1) masses of iron and

manganese and common fine distinct yellowish brown (10YR 5/6) masses of iron

throughout; moderately acid; clear smooth boundary.

Bt2—23 to 31 inches; brown (10YR 5/3) silty clay loam; moderate medium prismatic

structure parting to moderate medium subangular blocky; firm; few fine roots

throughout; many faint grayish brown (10YR 5/2) clay films on faces of peds and

many distinct very dark gray (10YR 3/1) organo-clay films on faces of peds and in

pores; many fine distinct yellowish brown (10YR 5/6) and few fine prominent

strong brown (7.5YR 5/6) masses of iron throughout; common fine prominent

black (2.5Y 2.5/1) masses of iron and manganese throughout and common fine

faint light brownish gray (10YR 6/2) iron depletions throughout; moderately acid;

gradual wavy boundary.

Btg1—31 to 47 inches; light brownish gray (2.5Y 6/2) silty clay loam; moderate coarse

prismatic structure parting to moderate coarse subangular blocky; firm; few fine

roots throughout; common faint grayish brown (10YR 5/2) clay films on faces of

peds and many prominent very dark gray (10YR 3/1) organo-clay films on faces of

peds and in pores; many fine and medium prominent strong brown (7.5YR 5/6)

masses of iron throughout; few fine prominent black (2.5Y 2.5/1) masses of iron

and manganese throughout; few fine faint light brownish gray (10YR 6/2) iron

depletions lining root channels and/or pores; neutral; gradual wavy boundary.

Btg2—47 to 57 inches; light brownish gray (2.5Y 6/2) silt loam; weak coarse prismatic

structure; firm; few fine roots throughout; common distinct dark grayish brown

(10YR 4/2) clay films in root channels and/or pores; many medium prominent

strong brown (7.5YR 5/6) masses of iron; few fine prominent black (2.5Y 2.5/1)

masses of iron and manganese throughout; neutral; clear wavy boundary.

BCg—57 to 67 inches; light brownish gray (2.5Y 6/2) silt loam; weak coarse

subangular blocky structure; firm; common distinct dark grayish brown (10YR 4/2)

clay films in root channels and/or pores; common medium prominent strong brown

(7.5YR 5/6) and common medium prominent yellowish red (5YR 5/6) masses of

iron throughout; neutral; clear wavy boundary.

Cg—67 to 80 inches; light brownish gray (10YR 6/2) silt loam; massive; friable; few faint

dark grayish brown (10YR 4/2) clay films in root channels and/or pores; many
30 Soil Survey of

medium prominent yellowish red (5YR 4/6) and common medium prominent strong

brown (7.5YR 5/6) masses of iron throughout; neutral.

Range in Characteristics

Depth to carbonates: More than 40 inches

Depth to the base of the argillic horizon: 40 to 60 inches

Ap or A horizon:

Value—2 or 3

Chroma—1 or 2

Texture—silt loam

E or BE horizon:

Value—4 to 6

Chroma—1 or 2

Texture—silt loam

Bt horizon:

Hue—10YR

Value—4 to 6

Chroma—2 to 6

Texture—silty clay loam or silty clay

Btg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 or 2

Texture—silty clay loam, silty clay, or silt loam

Cg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 or 2

257A—Clarksdale silt loam, 0 to 2 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits

Map Unit Composition

Clarksdale and similar soils: 93 percent

Dissimilar soils: 7 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Clarksdale

soil

• Soils that have a thicker surface layer than that of the Clarksdale soil and a darker

subsurface layer

• Soils that have a seasonal high water table at a depth of 2 to 4 feet

• Soils that have slopes of more than 2 percent

Dissimilar soils:

• The poorly drained Denny soils, which are subject to ponding; in depressions
Knox County, Illinois 31

Properties and Qualities of the Clarksdale Soil

Parent material: Loess

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.3 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 0.5 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland where drained

Hydric soil status: Not hydric

9257A—Clarksdale silt loam, terrace, 0 to 2 percent

slopes

Setting

Landform: Stream terraces

Position on the landform: Summits

Map Unit Composition

Clarksdale and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Clarksdale

soil

• Soils that have a thicker surface layer than that of the Clarksdale soil and a darker

subsurface layer

• Soils that have a seasonal high water table at a depth of 2 to 4 feet

• Soils that have slopes of more than 2 percent

Dissimilar soils:

• The poorly drained Denny soils, which are subject to ponding; in depressions

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Clarksdale Soil

Parent material: Loess or other silty material

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow or moderate
32 Soil Survey of

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.4 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 0.5 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland where drained

Hydric soil status: Not hydric

Coatsburg Series

Taxonomic classification: Fine, smectitic, mesic Vertic Argiaquolls

Typical Pedon

Coatsburg silt loam, 5 to 10 percent slopes, eroded, at an elevation of 700 feet; Adams

County, Illinois; 2,550 feet east and 2,400 feet north of the southwest corner of sec. 20,

T. 2 N., R. 5 W.; USGS Augusta topographic quadrangle; lat. 40 degrees 08 minutes 31

seconds N. and long. 91 degrees 70 minutes 25 seconds W., NAD 27:

Ap—0 to 6 inches; very dark gray (10YR 3/1) silt loam, dark grayish brown (10YR 4/2)

dry; moderate fine granular structure; friable; many fine and medium roots;

moderately acid; abrupt smooth boundary.

AB—6 to 10 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry;

weak medium subangular blocky structure parting to moderate fine subangular

blocky; firm; common fine roots; few patchy prominent light gray (10YR 7/1) (dry)

clay depletions on faces of peds; common fine prominent irregular strong brown

(7.5YR 5/6) masses of iron oxide throughout; many fine prominent irregular light

olive brown (2.5Y 5/4) masses of iron oxide throughout; moderately acid; clear

wavy boundary.

2Btg1—10 to 14 inches; dark grayish brown (10YR 4/2) silty clay loam; weak medium

subangular blocky structure; firm; few fine roots; common continuous distinct very

dark gray (10YR 3/1) organo-clay films on faces of peds; common discontinuous

distinct dark gray (10YR 4/1) clay films on faces of peds; common fine prominent

irregular strong brown (7.5YR 5/6) and many fine prominent irregular light olive

brown (2.5Y 5/4) masses of iron oxide throughout; moderately acid; clear wavy

boundary.

2Btg2—14 to 19 inches; grayish brown (10YR 5/2) silty clay; weak coarse prismatic

structure parting to weak medium subangular blocky; firm; few fine and medium

roots; common discontinuous distinct very dark gray (10YR 3/1) organo-clay films

on faces of peds; many fine prominent irregular strong brown (7.5YR 5/6) masses

of iron oxide throughout; common fine faint irregular light brownish gray (10YR 6/2)

iron depletions throughout; moderately acid; clear wavy boundary.

2Btg3—19 to 26 inches; grayish brown (10YR 5/2) silty clay loam; weak very coarse

prismatic structure; firm; few fine roots; few patchy distinct very dark gray (10YR

3/1) organo-clay films on faces of peds; common discontinuous distinct gray
Knox County, Illinois 33

(10YR 5/1) clay films on faces of peds; common fine and medium prominent

irregular strong brown (7.5YR 5/6) masses of iron oxide throughout; many fine

faint irregular light brownish gray (10YR 6/2) iron depletions throughout;

moderately acid; clear wavy boundary.

2Btg4—26 to 38 inches; grayish brown (10YR 5/2) silty clay loam; weak very coarse

prismatic structure; firm; few very fine roots; few discontinuous distinct gray (10YR

5/1) clay films on faces of peds and in pores; common fine and medium prominent

irregular black (2.5Y 2.5/1) masses of iron and manganese oxide throughout;

common fine and medium prominent irregular strong brown (7.5YR 5/6) masses of

iron oxide throughout; many fine and medium faint irregular light brownish gray

(10YR 6/2) iron depletions throughout; moderately acid; clear wavy boundary.

2Btg5—38 to 45 inches; light brownish gray (10YR 6/2) silty clay loam; moderate very

coarse prismatic structure; firm; few discontinuous distinct dark gray (10YR 4/1)

clay films lining root channels and pores; common discontinuous distinct grayish

brown (10YR 5/2) clay films on faces of peds; common patchy prominent light gray

(10YR 7/2) clay depletions on faces of peds; common medium prominent irregular

brownish yellow (10YR 6/8) masses of iron oxide throughout; slightly acid; clear

wavy boundary.

2Btg6—45 to 62 inches; gray (10YR 6/1) silty clay loam; moderate very coarse

prismatic structure; firm; many continuous prominent light gray (10YR 7/2) clay

depletions on faces of peds; common continuous distinct gray (10YR 5/1) clay

films on faces of peds; few medium prominent irregular black (2.5Y 2.5/1) masses

of iron and manganese oxide throughout; common medium and coarse prominent

irregular brownish yellow (10YR 6/6) masses of iron oxide throughout; slightly acid;

clear wavy boundary.

2Btg7—62 to 70 inches; light brownish gray (10YR 6/2) silty clay; weak very coarse

prismatic structure parting to moderate medium subangular blocky; very firm; few

continuous distinct gray (10YR 6/1) clay films on faces of peds and in pores;

common fine prominent irregular black (2.5Y 2.5/1) masses of iron and

manganese oxide throughout; many medium prominent irregular strong brown

(7.5YR 5/6) masses of iron oxide throughout; 2 percent pressure faces throughout;

slightly acid; gradual wavy boundary.

2BCg—70 to 80 inches; gray (10YR 6/1) silty clay; weak very coarse prismatic

structure; firm; common fine prominent irregular black (2.5Y 2.5/1) masses of iron

and manganese oxide throughout; many coarse prominent irregular brownish

yellow (10YR 6/6) masses of iron oxide throughout; slightly acid.

Range in Characteristics

Thickness of the loess: Less than 20 inches

Thickness of the mollic epipedon: 10 to 20 inches

Depth to the base of the argillic horizon: 50 to 80 inches

Ap, A, or AB horizon:

Value—2 or 3

Chroma—1 or 2

Texture—silt loam, silty clay loam, or clay loam

Reaction—strongly acid to slightly alkaline (where limed)

Bt, Btg, 2Bt, or 2Btg horizon:

Hue—10YR, 2.5Y, 5Y, or N

Value—3 to 6

Chroma—0 to 2

Texture—clay, clay loam, silty clay, or silty clay loam

Reaction—strongly acid to slightly acid
34 Soil Survey of

2BCg or 2Cg horizon (if it occurs):

Hue—10YR, 7.5YR, 2.5Y, 5Y, or N

Value—4 to 6

Chroma—0 to 2

Texture—clay, clay loam, silty clay, silty clay loam, or loam

Reaction—moderately acid to slightly alkaline

660C2—Coatsburg silty clay loam, 5 to 10 percent

slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Coatsburg and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Coatsburg

soils

• Soils that have slopes of more than 10 percent

Dissimilar soils:

• The moderately well drained Assumption soils in positions similar to those of the

Coatsburg soil

• The well drained Hickory soils on the lower backslopes

Properties and Qualities of the Coatsburg Soil

Parent material: Loess and a strongly developed paleosol

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Very slow

Permeability below a depth of 60 inches: Very slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 7.8 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: At the surface,

January through May

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Very high

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Hydric
Knox County, Illinois 35

Denny Series

Taxonomic classification: Fine, smectitic, mesic Mollic Albaqualfs

Typical Pedon

Denny silt loam, 0 to 2 percent slopes, at an elevation of 720 feet; McDonough County,

Illinois; 225 feet north and 1,680 feet east of the southwest corner of sec. 25, T. 7 N.,

R. 3 W.; USGS Good Hope topographic quadrangle; lat. 40 degrees 33 minutes 31

seconds N. and long. 90 degrees 41 minutes 14 seconds W., NAD 27:

Ap—0 to 8 inches; very dark gray (10YR 3/1) silt loam, gray (10YR 5/1) dry; weak fine

granular structure; very friable; few very fine roots throughout; moderately acid;

abrupt smooth boundary.

Eg1—8 to 14 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray

(10YR 6/2) dry; weak thick platy structure parting to weak thin platy; very friable;

few very fine roots throughout; few very fine vesicular pores throughout; few faint

very dark gray (10YR 3/1) organic coatings in root channels; common faint grayish

brown (10YR 5/2) clay depletions on faces of peds; common fine distinct dark

yellowish brown (10YR 3/6) masses of iron and manganese accumulation

throughout; few fine prominent black (N 2.5/) iron and manganese concretions in

the matrix; moderately acid; clear smooth boundary.

Eg2—14 to 21 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry;

weak thick platy structure parting to moderate medium platy; friable; few very fine

roots throughout; few fine tubular pores and few very fine vesicular pores

throughout; few faint very dark gray (10YR 3/1) organic coatings in root channels;

common fine faint dark brown (10YR 3/3) masses of iron and manganese

accumulation throughout; common fine prominent black (N 2.5/) iron and

manganese concretions in the matrix; moderately acid; abrupt smooth boundary.

Btg1—21 to 29 inches; grayish brown (10YR 5/2) silty clay loam; moderate fine and

medium subangular blocky structure; firm; few very fine roots between peds;

common faint dark grayish brown (10YR 4/2) clay films on faces of peds; few faint

very dark gray (10YR 3/1) organic coats in root channels; many fine prominent

dark yellowish brown (10YR 4/6) and common fine distinct yellowish brown (10YR

5/4) masses of iron and manganese accumulation throughout; common fine

prominent black (N 2.5/) iron and manganese concretions in the matrix;

moderately acid; clear smooth boundary.

Btg2—29 to 38 inches; grayish brown (10YR 5/2) silty clay loam; moderate medium

prismatic structure parting to moderate medium subangular blocky; firm; few very

fine roots between peds; common faint dark grayish brown (10YR 4/2) clay films

on faces of peds; few faint very dark gray (10YR 3/1) organic coatings in root

channels; many fine prominent dark yellowish brown (10YR 4/6) and common fine

prominent yellowish brown (10YR 5/8) masses of iron and manganese

accumulation throughout; common fine prominent black (N 2.5/) iron and

manganese concretions in the matrix; moderately acid; gradual smooth boundary.

Btg3—38 to 46 inches; light brownish gray (2.5Y 6/2) silty clay loam; moderate coarse

prismatic structure parting to moderate coarse subangular blocky; firm; very few

fine roots between peds; common distinct dark grayish brown (10YR 4/2) clay

films on faces of peds; few prominent very dark gray (10YR 3/1) organic coatings

in root channels; many fine prominent dark yellowish brown (10YR 4/6) and

common fine prominent strong brown (7.5YR 5/6) masses of iron and manganese

accumulation throughout; common fine prominent black (N 2.5/) iron and

manganese concretions in the matrix; moderately acid; gradual wavy boundary.

Cg1—46 to 63 inches; light brownish gray (2.5Y 6/2) silty clay loam; massive; firm; few

very fine roots between peds; few very fine vesicular pores throughout; very few
36 Soil Survey of

prominent very dark gray (10YR 3/1) organic coatings in root channels; many fine

prominent dark yellowish brown (10YR 4/6) and common fine prominent strong

brown (7.5YR 5/6) masses of iron and manganese accumulation throughout; few

medium prominent black (N 2.5/) iron and manganese concretions in the matrix;

slightly acid; diffuse wavy boundary.

Cg2—63 to 80 inches; light brownish gray (2.5Y 6/2) silt loam; massive; firm; many

very fine vesicular pores throughout; very few prominent very dark gray (10YR

3/1) organic coatings in root channels; many fine prominent dark yellowish brown

(10YR 4/6) and common fine prominent strong brown (7.5YR 5/6) masses of iron

and manganese accumulation throughout; few medium prominent black (N 2.5/)

iron and manganese concretions in the matrix; slightly acid.

Range in Characteristics

Depth to the base of the diagnostic horizon: 40 to 65 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

Texture—silt loam

Eg horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—1 or 2

Texture—silt loam

Btg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 or 2

Texture—silty clay loam or silty clay

Cg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 or 2

Texture—silt loam or silty clay loam

45A—Denny silt loam, 0 to 2 percent slopes

Setting

Landform: Depressions on ground moraines

Map Unit Composition

Denny and similar soils: 98 percent

Dissimilar soils: 2 percent

Minor Components

Similar soils:

• Soils that have a thicker surface layer than that of the Denny soil and do not have a

light-colored subsurface layer

• Soils that have a thinner or lighter colored surface layer than that of the Denny

soil
Knox County, Illinois 37

Dissimilar soils:

• The poorly drained Sable soils on summits

• The somewhat poorly drained Clarksdale and Keomah soils on summits

Properties and Qualities of the Denny Soil

Parent material: Loess

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.6 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: At the surface,

January through May

Ponding depth: 0.5 foot during wet periods

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3w

Prime farmland category: Prime farmland where drained

Hydric soil status: Hydric

Dorchester Series

Taxonomic classification: Fine-silty, mixed, superactive, calcareous, mesic Typic

Udifluvents

Typical Pedon

Dorchester silt loam, at an elevation of 540 feet; Peoria County, Illinois; 1,600 feet east

and 1,650 feet south of the northwest corner of sec. 36, T. 10 N., R. 6 E.; USGS Oak

Hill topographic quadrangle; lat. 40 degrees 48 minutes 31 seconds N. and long. 89

degrees 46 minutes 11 seconds W., NAD 27:

Ap—0 to 9 inches; dark grayish brown (10YR 4/2) silt loam, light gray (10YR 6/1) dry;

weak medium platy structure parting to weak very fine subangular blocky; friable;

few very fine roots; few faint very dark grayish brown (10YR 3/2) organic stains on

faces of peds; slightly effervescent; slightly alkaline; abrupt smooth boundary.

C—9 to 32 inches; stratified dark grayish brown (10YR 4/2), grayish brown (10YR 5/2),

brown (10YR 5/3), very dark gray (10YR 3/1), and very dark grayish brown (10YR

3/2) silt loam; few thin strata of loam; massive with moderate thin bedding planes

resulting from stratification; friable; few very fine roots; slightly effervescent; slightly

alkaline; abrupt smooth boundary.

2Ab1—32 to 43 inches; black (10YR 2/1) silt loam; weak fine subangular blocky

structure parting to weak very fine granular; friable; slightly alkaline; gradual

smooth boundary.

2Ab2—43 to 60 inches; very dark gray (10YR 3/1) silt loam; moderate fine subangular

blocky structure; friable; many faint black (10YR 2/1) organic stains on faces of
38 Soil Survey of

peds; few fine distinct brown (10YR 4/3) redoximorphic features below a depth of 48

inches; slightly alkaline.

Range in Characteristics

Thickness of the solum: Less than 10 inches

Depth to the 2Ab horizon: 20 to 45 inches

Ap or A horizon:

Hue—10YR

Value—3 or 4

Chroma—2 or 3

Texture—silt loam, loam, or silty clay loam

C horizon:

Hue—10YR

Value—3 to 5

Chroma—1 to 3

Texture—silt loam; thin strata of loam in some pedons

2Ab horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—clay loam, silt loam, or silty clay loam

8239A—Dorchester silt loam, 0 to 2 percent slopes,

occasionally flooded

Setting

Landform: Flood plains

Map Unit Composition

Dorchester and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a seasonal high water table at a depth of 4 to 6 feet

• Soils that have a thicker surface layer than that of the Dorchester soil

• Soils that are not calcareous in all or part of the profile

Dissimilar soils:

• The poorly drained Sawmill soils in the slightly lower positions on flood plains

Properties and Qualities of the Dorchester Soil

Parent material: Alluvium

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 13.6 inches

Content of organic matter in the surface layer: 0.5 to 2.0 percent

Shrink-swell potential: Moderate

Frequency and most likely period of flooding: Occasional, November through June

Potential for frost action: High
Knox County, Illinois 39

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 2w

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

536—Dumps, mine

• This map unit consists of nearly level to very steep accumulations of refuse derived

from the washing and separation of coal. The refuse consists of shale and siltstone

fragments, sandstone cobbles, coal fragments, and loamy cast overburden material.

Textures are predominantly loamy. The soil typically is compacted and is extremely

acid. Some escarpments are at the edge of the mapped areas.

Interpretive Groups

Land capability classification: None assigned

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

835G—Earthen dams

• This map unit consists of loamy and clayey soil material that has been used to form

earthen dams for ponds and lakes. The areas are typically sloping to moderately

steep. Level roadways are on the top of some of the larger structures.

Interpretive Groups

Land capability classification: None assigned

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Edinburg Series

Taxonomic classification: Fine, smectitic, mesic Vertic Argiaquolls

Typical Pedon

Edinburg silty clay loam, 0 to 2 percent slopes, at an elevation of 615 feet; Sangamon

County, Illinois; 1,200 feet south and 276 feet east of the center of sec. 22, T. 14 N., R.

6 W.; USGS Chatham topographic quadrangle; lat. 39 degrees 38 minutes 37 seconds

N. and long. 89 degrees 45 minutes 00 seconds W., NAD 27:

Ap—0 to 8 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry;

moderate fine and medium granular structure; friable; common fine and very fine

roots; neutral; abrupt smooth boundary.

A—8 to 10 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry;

moderate medium granular structure with some moderate very fine subangular

blocky; firm; common fine and very fine roots; neutral; clear smooth boundary.

BE—10 to 16 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry;

weak and moderate fine subangular blocky structure; firm; common very fine and

few fine roots; few distinct light brownish gray (10YR 6/2) (dry) silt coatings on
40 Soil Survey of

faces of peds; few fine yellowish brown (10YR 5/8) concretions of iron and

manganese; few fine faint very dark grayish brown (2.5Y 3/2) and few fine distinct

olive brown (2.5Y 4/4) and dark grayish brown (2.5Y 4/2) redoximorphic features;

neutral; clear smooth boundary.

Btg1—16 to 20 inches; dark gray (10YR 4/1) silty clay loam; moderate fine angular blocky

structure; firm; few very fine roots; many distinct very dark gray (10YR 3/1) clay films

on faces of peds; few fine concretions of iron and manganese; few fine distinct olive

brown (2.5Y 4/4) redoximorphic features; neutral; gradual smooth boundary.

Btg2—20 to 26 inches; dark gray (10YR 4/1) silty clay; moderate medium prismatic

structure parting to moderate medium and coarse angular blocky; firm; few very

fine roots; common distinct dark gray (10YR 4/1) clay films on faces of peds;

common fine concretions of iron and manganese; few fine distinct olive brown

(2.5Y 4/4) redoximorphic features; slightly acid; gradual smooth boundary.

Btg3—26 to 34 inches; dark gray (10YR 4/1) silty clay loam; moderate medium

prismatic structure parting to moderate coarse angular blocky; firm; few very fine

roots; common distinct dark gray (10YR 4/1) clay films and few faint very dark gray

(10YR 3/1) organic coatings on faces of peds; few fine concretions of iron and

manganese; common fine distinct yellowish brown (10YR 5/6 and 5/8)

redoximorphic features; neutral; gradual smooth boundary.

Btg4—34 to 41 inches; olive gray (5Y 5/2) silty clay loam; moderate medium prismatic

structure parting to moderate coarse angular blocky; firm; few very fine roots; few

distinct dark gray (10YR 4/1) clay films and very dark gray (10YR 3/1) organic

coatings on vertical faces of peds; few fine concretions of iron and manganese;

many fine and medium prominent yellowish brown (10YR 5/6 and 5/8)

redoximorphic features; neutral; gradual smooth boundary.

BCg—41 to 55 inches; olive gray (5Y 5/2) silty clay loam; weak medium prismatic

structure parting to weak coarse angular blocky; friable; few faint dark gray (10YR

4/1) clay films and very dark gray (10YR 3/1) organic coatings on vertical faces of

peds; few fine concretions of iron and manganese; many fine and medium

prominent yellowish brown (10YR 5/6 and 5/8) redoximorphic features; neutral;

gradual smooth boundary.

C—55 to 60 inches; mottled light olive gray (5Y 6/2) and yellowish brown (10YR 5/6) silt

loam; massive; friable; dark gray (10YR 4/1) linings in channels; neutral.

Range in Characteristics

Thickness of the mollic epipedon: 10 to 24 inches

Depth to the base of the argillic horizon: 40 to 65 inches

Ap or A horizon:

Value—2 or 3

Chroma—1 or 2

Texture—silty clay loam or silt loam

Reaction—moderately acid to slightly alkaline (in limed areas)

BEg or Eg horizon:

Value—3 or 4

Chroma—1 or 2

Texture—silty clay loam or silt loam

Reaction—moderately acid to neutral

Btg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—3 to 6

Chroma—1 or 2

Texture—silty clay loam or silty clay

Reaction—moderately acid to neutral
Knox County, Illinois 41

BCg or Cg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—5 or 6

Chroma—1 or 2

Reaction—slightly acid to slightly alkaline

249A—Edinburg silty clay loam, 0 to 2 percent slopes

Setting

Landform: Depressions on ground moraines

Map Unit Composition

Edinburg and similar soils: 97 percent

Dissimilar soils: 3 percent

Minor Components

Similar soils:

• Soils that have a thinner surface layer than that of the Edinburg soil and have a

lighter colored subsurface layer

Dissimilar soils:

• The poorly drained Sable soils on summits

• The somewhat poorly drained Clarksdale and Keomah soils on summits

Properties and Qualities of the Edinburg Soil

Parent material: Loess

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Moderately slow or moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.3 inches

Content of organic matter in the surface layer: 3 to 6 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: At the surface,

January through May

Ponding depth: 0.2 foot during wet periods

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3w

Prime farmland category: Prime farmland where drained

Hydric soil status: Hydric

Elco Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Oxyaquic

Hapludalfs
42 Soil Survey of

Typical Pedon

Elco silt loam, 10 to 18 percent slopes, eroded, at an elevation of 730 feet; Warren

County, Illinois; 1,900 feet west and 2,000 feet south of the northeast corner of sec. 20,

T. 8 N., R. 2 W.; USGS Roseville topographic quadrangle; lat. 40 degrees 40 minutes

11 seconds N. and long. 90 degrees 38 minutes 38 seconds W., NAD 27:

A—0 to 2 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR

6/2) dry; moderate fine granular structure; friable; many roots; neutral; clear

smooth boundary.

E—2 to 9 inches; brown (10YR 5/3) and dark grayish brown (10YR 4/2) silt loam;

moderate thin platy structure; very friable; many roots; common faint very pale

brown (10YR 7/3) silt coatings on faces of peds; neutral; abrupt smooth boundary.

Bt1—9 to 18 inches; yellowish brown (10YR 5/4) silty clay loam; moderate fine

subangular structure; friable; many roots; common faint dark yellowish brown

(10YR 4/4) clay films; common distinct very pale brown (10YR 8/3) silt coatings;

dark grayish brown (10YR 4/2) krotovina; moderately acid; clear smooth boundary.

Bt2—18 to 26 inches; yellowish brown (10YR 5/4) silty clay loam; weak medium

prismatic structure parting to moderate fine subangular blocky; friable; many roots;

common faint dark yellowish brown (10YR 4/4) clay films; common distinct very

pale brown (10YR 8/3) silt coatings; common prominent black (5YR 2.5/1) stains

and concretions of manganese; strongly acid; clear smooth boundary.

2Bt3—26 to 32 inches; light yellowish brown (10YR 6/4) silty clay loam; common

medium distinct strong brown (7.5YR 5/6) mottles; weak medium prismatic

structure parting to moderate fine and medium subangular blocky; friable; few

roots; common faint brown (10YR 5/3) clay films; common faint very pale brown

(10YR 8/3) silt coatings; common prominent black (5YR 2.5/1) stains and

concretions of manganese; strongly acid; clear smooth boundary.

2Bt4—32 to 45 inches; brown (10YR 5/3) clay; many medium distinct yellowish brown

(10YR 5/6) mottles; strong medium and coarse prismatic subangular blocky

structure; firm; few roots; many faint grayish brown (10YR 5/2) clay films; many

prominent black (5YR 2.5/1) stains and concretions of manganese; strongly acid;

clear smooth boundary.

2Btg—45 to 60 inches; grayish brown (2.5Y 5/2) clay; many medium and coarse

prominent yellowish brown (10YR 5/6) mottles; moderate medium prismatic

structure; firm; few roots; many faint dark grayish brown (2.5Y 4/2) clay films; many

prominent black (5YR 2.5/1) stains and concretions of manganese; moderately

acid.

Range in Characteristics

Thickness of the loess: 20 to 40 inches

Thickness of the solum: More than 48 inches

Depth to paleosol till: Less than 60 inches

Ap or A horizon:

Hue—10YR

Value—3 to 5

Chroma—1 to 4

Texture—silt loam

Reaction—moderately acid to neutral

E horizon:

Hue—10YR

Value—4 or 5

Chroma—2 to 4
Knox County, Illinois 43

Texture—silt loam

Reaction—moderately acid to neutral

Bt horizon:

Hue—7.5YR or 10YR

Value—4 or 5

Chroma—2 to 6

Texture—silty clay loam or silt loam

Reaction—strongly acid to slightly alkaline

2Bt or 2Btg horizon:

Hue—7.5YR, 10YR, 2.5Y, or 5Y

Value—3 to 6

Chroma—1 to 6

Texture—loam, clay loam, silty clay loam, silty clay, or clay

Reaction—strongly acid to slightly alkaline

119D2—Elco silt loam, 10 to 18 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Elco and similar soils: 94 percent

Dissimilar soils: 6 percent

Minor Components

Similar soils:

• Soils that have a darker and thicker surface layer than that of the Elco soil

• Soils that have less clay in the subsoil than the Elco soil

• Soils that have more clay in the surface layer than the Elco soil

Dissimilar soils:

• The somewhat poorly drained Atlas soils on nose slopes and in the more eroded

areas

• The somewhat poorly drained Lawson soils in drainageways and on flood plains

Properties and Qualities of the Elco Soil

Parent material: Loess over a paleosol that formed in till

Drainage class: Moderately well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Slow or moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.2 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: High

Depth and months of the highest perched seasonal high water table: 2 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete
44 Soil Survey of

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

119E2—Elco silt loam, 18 to 25 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Elco and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker and thicker surface layer than that of the Elco soil

• Soils that have less clay in the subsoil than the Elco soil

• Soils that have more clay in the surface layer than the Elco soil

Dissimilar soils:

• The somewhat poorly drained Lawson soils in drainageways and on flood plains

Properties and Qualities of the Elco Soil

Parent material: Loess over a paleosol that formed in till

Drainage class: Moderately well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Slow or moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.7 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Depth and months of the highest perched seasonal high water table: 2 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 45

Elkhart Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Argiudolls

Taxadjunct features: The Elkhart soils in map units 567B2, 567C2, and 567D3 have a

thinner dark surface layer than is defined as the range for the series. This

difference, however, does not significantly affect the use and management of the

soils. These soils are classified as fine-silty, mixed, superactive, mesic Mollic

Hapludalfs.

Typical Pedon

Elkhart silt loam, 4 to 7 percent slopes, eroded, at an elevation of 570 feet; Logan

County, Illinois; 2,060 feet south and 1,248 feet west of the northeast corner of sec. 32,

T. 19 N., R. 3 W.; USGS Broadwell topographic quadrangle; lat. 40 degrees 03 minutes

26 seconds N. and long. 89 degrees 26 minutes 58 seconds W., NAD 27:

Ap—0 to 8 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown

(10YR 4/2) dry; weak fine and medium granular structure; friable; common very

fine roots; slightly acid; abrupt smooth boundary.

A—8 to 10 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown

(10YR 4/2) dry; moderate fine granular structure; friable; common very fine roots;

slightly acid; clear smooth boundary.

BA—10 to 15 inches; dark brown (10YR 3/3) silty clay loam, brown (10YR 4/3) dry;

moderate very fine and fine subangular blocky structure; friable; common very fine

roots; common faint very dark grayish brown (10YR 3/2) organic coatings on faces

of peds; slightly acid; clear smooth boundary.

Bt1—15 to 22 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate fine

subangular blocky structure; firm; few very fine roots; common distinct very dark

grayish brown (10YR 3/2) organo-clay films on faces of peds; slightly acid; clear

smooth boundary.

Bt2—22 to 28 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate fine

and medium subangular blocky structure; firm; few very fine roots; few faint dark

brown (10YR 3/3) organo-clay films on faces of peds; slightly acid; clear smooth

boundary.

BCt—28 to 31 inches; yellowish brown (10YR 5/4) silty clay loam; weak medium and

coarse subangular blocky structure; friable; few very fine roots; few faint brown

(10YR 4/3) clay films on faces of peds; few fine prominent black (5YR 2.5/1) very

weakly cemented concretions of manganese with diffuse boundaries in ped

interiors; neutral; clear smooth boundary.

C—31 to 60 inches; yellowish brown (10YR 5/4) silt loam; massive; friable; few very

fine roots in the upper 10 inches; common fine prominent strong brown (7.5YR

5/8) masses of iron in ped interiors; common medium distinct gray (10YR 6/1) iron

depletions along root channels and pores; strongly effervescent; moderately

alkaline.

Range in Characteristics:

Thickness of the mollic epipedon: 10 to 20 inches

Depth to the base of the argillic horizon: 20 to 40 inches

Depth to carbonates: 20 to 40 inches

Ap, A, or AB horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3
46 Soil Survey of

Texture—silt loam or silty clay loam

Reaction—moderately acid to slightly alkaline

BA or Bt horizon:

Hue—7.5YR or 10YR

Value—3 to 5

Chroma—3 to 6

Texture—silty clay loam or silt loam

Reaction—moderately acid to neutral

BC horizon:

Hue—7.5YR, 10YR, or 2.5Y

Value—4 to 6

Chroma—3 to 6

Texture—silt loam or silty clay loam

Reaction—slightly acid to moderately alkaline

C horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 to 6

Texture—silt or silt loam

Reaction—slightly alkaline to moderately alkaline

567B2—Elkhart silt loam, 2 to 5 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Summits and shoulders

Map Unit Composition

Elkhart and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that are not calcareous within 40 inches of the surface

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Elkhart Soil

Parent material: Calcareous loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.3 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.
Knox County, Illinois 47

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

567C2—Elkhart silt loam, 5 to 10 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes and shoulders

Map Unit Composition

Elkhart and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that are not calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Elkhart Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.4 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
48 Soil Survey of

567D2—Elkhart silt loam, 10 to 18 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Elkhart and similar soils: 97 percent

Dissimilar soils: 3 percent

Minor Components

Similar soils:

• Soils that are not calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Elkhart Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.4 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

567D3—Elkhart silty clay loam, 10 to 18 percent slopes,

severely eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Elkhart and similar soils: 96 percent

Dissimilar soils: 4 percent
Knox County, Illinois 49

Minor Components

Similar soils:

• Soils that are not calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Elkhart Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.3 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Fayette Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Hapludalfs

Typical Pedon

Fayette silt loam, 10 to 18 percent slopes, eroded, at an elevation of 680 feet; Warren

County, Illinois; 2,100 feet north and 1,700 feet west of the southeast corner of sec. 31,

T. 12 N., R. 3 W.; USGS Rozetta topographic quadrangle; lat. 40 degrees 59 minutes

13 seconds N. and long. 90 degrees 46 minutes 18 seconds W., NAD 27:

Ap/E—0 to 5 inches; mixed dark grayish brown (10YR 4/2) and yellowish brown (10YR

5/4) silt loam, light brownish gray (10YR 6/2) dry; moderate medium granular

structure; friable; common fine roots throughout; moderately acid; clear smooth

boundary.

EB—5 to 9 inches; mixed brown (10YR 5/3) and yellowish brown (10YR 5/4) silt loam;

weak medium platy structure parting to moderate fine subangular blocky; friable;

common fine roots between peds; few faint dark yellowish brown (10YR 4/4) clay

films on faces of peds; moderately acid; clear smooth boundary.

Bt1—9 to 13 inches; dark yellowish brown (10YR 4/4) silt loam; moderate fine and

medium subangular blocky structure; friable; few fine roots between peds;
50 Soil Survey of

common faint brown (10YR 4/3) clay films on faces of peds; moderately acid; clear

smooth boundary.

Bt2—13 to 27 inches; yellowish brown (10YR 5/4) silty clay loam; moderate medium

subangular blocky structure; friable; few fine roots between peds; common faint

dark yellowish brown (10YR 4/4) clay films on faces of peds; moderately acid;

gradual smooth boundary.

Bt3—27 to 38 inches; yellowish brown (10YR 5/4) silty clay loam; weak coarse

prismatic structure parting to moderate medium subangular blocky; friable;

common faint dark yellowish brown (10YR 4/4) clay films on faces of peds;

common distinct light gray (10YR 7/2) (dry) clay depletions on faces of peds; few

distinct dark brown (7.5YR 3/2) accumulations of iron-manganese on faces of

peds; moderately acid; gradual wavy boundary.

BC—38 to 55 inches; yellowish brown (10YR 5/4) silt loam; moderate medium and

coarse subangular blocky structure; friable; common faint dark yellowish brown

(10YR 4/4) clay films on faces of peds; common distinct light gray (10YR 7/2) (dry)

clay depletions on faces of peds; few distinct dark brown (7.5YR 3/2)

accumulations of iron-manganese on faces of peds; moderately acid; clear wavy

boundary.

C—55 to 60 inches; yellowish brown (10YR 5/4) silt loam; massive; friable; few distinct

dark brown (7.5YR 3/2) concretions of iron and manganese throughout the matrix;

moderately acid.

Range in Characteristics

Thickness of the solum: 36 to 70 inches

Depth to free carbonates: More than 40 inches

Ap or A horizon:

Hue—10YR

Value—2 to 4

Chroma—1 to 3

E horizon (if it occurs):

Value—3 to 5

Chroma—1 to 4

Bt horizon:

Hue—10YR

Value—4 or 5

Chroma—3 to 6

BC and C horizons:

Hue—10YR

Value—4 or 5

Chroma—4 to 6

Texture—silt loam or silty clay loam

280B—Fayette silt loam, 2 to 5 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits and shoulders

Map Unit Composition

Fayette and similar soils: 97 percent

Dissimilar soils: 3 percent
Knox County, Illinois 51

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Fayette soil

• Soils that have a seasonal high water table within 6 feet of the surface

• Soils that are calcareous within 40 inches of the surface

• Soils that have slopes of less than 2 percent

Dissimilar soils:

• The somewhat poorly drained Keomah soils on summits

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.6 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

280C2—Fayette silt loam, 5 to 10 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Fayette and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Fayette soil

• Soils that have a seasonal high water table within 6 feet of the surface

• Soils that are calcareous within 40 inches of the surface

Dissimilar soils:

• The somewhat poorly drained Keomah soils near the head of drainageways

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate
52 Soil Survey of

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

280D2—Fayette silt loam, 10 to 18 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Fayette and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that are calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

Dissimilar soils:

• The somewhat poorly drained Orion soils in drainageways

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low
Knox County, Illinois 53

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

280F—Fayette silt loam, 18 to 35 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Fayette and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that are calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

• Soils that have thin sandy layers in the underlying material

Dissimilar soils:

• The somewhat poorly drained Orion soils in drainageways

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.7 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

9280B—Fayette silt loam, terrace, 2 to 5 percent slopes

Setting

Landform: Terraces

Position on the landform: Shoulders and summits
54 Soil Survey of

Map Unit Composition

Fayette and similar soils: 97 percent

Dissimilar soils: 3 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Fayette soil

• Soils that have a seasonal high water table within 6 feet of the surface

• Soils that are calcareous within 40 inches of the surface

• Soils that have slopes of less than 2 percent

Dissimilar soils:

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.6 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

9280C2—Fayette silt loam, terrace, 5 to 10 percent slopes,

eroded

Setting

Landform: Terraces

Position on the landform: Shoulders and backslopes

Map Unit Composition

Fayette and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Fayette soil

• Soils that have a seasonal high water table within 6 feet of the surface

• Soils that are calcareous within 40 inches of the surface
Knox County, Illinois 55

Dissimilar soils:

• The somewhat poorly drained Keomah soils near the head of drainageways

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Fayette Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Greenbush Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

Typical Pedon

Greenbush silt loam, 2 to 5 percent slopes, at an elevation of 700 feet; Warren County,

Illinois; 1,500 feet west and 1,500 feet north of the southeast corner of sec. 18, T. 8 N.,

R. 1 W.; USGS Greenbush topographic quadrangle; lat. 40 degrees 40 minutes 40

seconds N. and long. 90 degrees 32 minutes 45 seconds W., NAD 27:

Ap—0 to 6 inches; very dark gray (10YR 3/1) silt loam, gray (10YR 5/1) dry; moderate

fine granular structure; friable; slightly acid; abrupt smooth boundary.

E—6 to 10 inches; dark grayish brown (10YR 4/2) silt loam; weak thin platy structure;

friable; common faint very dark gray (10YR 3/1) organic coatings on faces of peds;

moderately acid; abrupt smooth boundary.

BE—10 to 17 inches; brown (10YR 4/3) silt loam; moderate medium platy structure

parting to weak fine subangular blocky; friable; few distinct very dark gray (10YR

3/1) organic coatings and common distinct gray (10YR 6/1) silt coatings on faces

of peds; moderately acid; clear smooth boundary.

Bt1—17 to 29 inches; yellowish brown (10YR 5/4) silty clay loam; weak medium

prismatic structure parting to moderate fine and medium angular blocky; friable;

common faint dark yellowish brown (10YR 4/4) clay films on faces of peds;

common distinct gray (10YR 6/1) silt coatings on faces of peds; strongly acid;

gradual smooth boundary.

Bt2—29 to 38 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate fine angular blocky; friable; common faint brown
56 Soil Survey of

(10YR 4/3) clay films on faces of peds; many faint light gray (10YR 7/2) silt

coatings on faces of peds; common medium distinct yellowish brown (10YR 5/6)

masses of iron; common medium distinct light olive gray (5Y 6/2) iron depletions

within peds; common prominent black (7.5YR 2.5/0) manganese oxide stains;

strongly acid; gradual wavy boundary.

Bt3—38 to 53 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate fine angular blocky; friable; common faint brown

(10YR 4/3) clay films on faces of peds; many faint light gray (10YR 7/2) silt

coatings on faces of peds; common medium distinct yellowish brown (10YR 5/6)

masses of iron; common medium distinct light olive gray (5Y 6/2) iron depletions

within peds; common prominent black (7.5YR 2.5/1) manganese oxide stains;

strongly acid; gradual wavy boundary.

BCt—53 to 75 inches; brown (10YR 5/3) and light olive gray (5Y 6/2) silt loam; weak

medium and coarse prismatic structure parting to weak fine and medium angular

blocky; friable; few faint brown (10YR 4/3) clay films on faces of peds; few faint

light gray (10YR 7/2) silt coatings on faces of peds; common medium distinct

yellowish brown (10YR 5/6) masses of iron within peds; common prominent black

(7.5YR 2.5/1) manganese oxide stains; moderately acid; gradual wavy boundary.

C—75 to 100 inches; yellowish brown (10YR 5/4) and light brownish gray (2.5Y 6/2)

silt loam; massive; friable; many medium distinct light brownish gray (10YR 6/2)

iron depletions within peds; many prominent black (7.5YR 2.5/1) manganese oxide

stains; moderately acid.

Range in Characteristics

Depth to carbonates: More than 60 inches

Depth to the base of the argillic horizon: 36 to 70 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

E horizon:

Hue—10YR

Value—3 to 5

Chroma—2 or 3

Bt horizon:

Hue—10YR

Value—4 or 5

Chroma—3 to 6

Texture—silty clay loam

C horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—2 to 6

Texture—silt loam

675B—Greenbush silt loam, 2 to 5 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Shoulders and summits
Knox County, Illinois 57

Map Unit Composition

Greenbush and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a thicker and darker surface layer than that of the Greenbush soil

• Soils that have a thinner or lighter colored surface layer than that of the Greenbush

soil

• Soils that do not have a seasonal high water table within 6 feet of the surface

• Soils that have slopes of less than 2 percent or more than 5 percent

Dissimilar soils:

• The poorly drained Denny soils in depressions

Properties and Qualities of the Greenbush Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.8 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and low for concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

9675B—Greenbush silt loam, terrace, 2 to 5 percent

slopes

Setting

Landform: Terraces

Position on the landform: Shoulders and summits

Map Unit Composition

Greenbush and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a thicker and darker surface layer than that of the Greenbush soil
58 Soil Survey of

• Soils that have a thinner or lighter colored surface layer than that of the Greenbush

soil

• Soils that do not have a seasonal high water table within 6 feet of the surface

• Soils that have slopes of less than 2 percent or more than 5 percent

Dissimilar soils:

• The poorly drained Denny soils in depressions

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Greenbush Soil

Parent material: Loess or other silty material

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.8 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

Harvard Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

Typical Pedon

Harvard silt loam, 2 to 5 percent slopes, at an elevation of 832 feet; Knox County,

Illinois; 2,300 feet east and 1,320 feet south of the northwest corner of sec. 16, T. 9 N.,

R. 3 E.; USGS Maquon topographic quadrangle; lat. 40 degrees 46 minutes 04

seconds N. and long. 90 degrees 10 minutes 05 seconds W., NAD 27:

Ap—0 to 7 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; weak thick platy structure parting to weak fine subangular blocky; friable;

few very fine roots; few distinct dark yellowish brown (10YR 4/4) fragments of

material from the E horizon in the lower part; neutral; abrupt smooth boundary.

Bt1—7 to 14 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate fine

subangular blocky structure; friable; few very fine roots; few distinct very dark

grayish brown (10YR 3/2) organo-clay films on faces of peds and in pore linings;

slightly acid; clear wavy boundary.

Bt2—14 to 22 inches; dark yellowish brown (10YR 4/4) silty clay loam; weak fine

prismatic structure parting to moderate fine subangular blocky; friable; few very

fine roots; few distinct brown (10YR 4/3) clay films on faces of peds; slightly acid;

clear smooth boundary.
Knox County, Illinois 59

Bt3—22 to 32 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate

medium prismatic structure parting to moderate medium subangular blocky;

friable; common distinct brown (10YR 4/3) clay films on faces of peds; slightly acid;

clear smooth boundary.

Bt4—32 to 37 inches; brown (10YR 4/3) silt loam; weak coarse subangular blocky

structure; friable; few distinct brown (10YR 4/3) clay films on faces of peds; neutral;

clear smooth boundary.

2Bt5—37 to 45 inches; yellowish brown (10YR 5/4) clay loam; weak coarse subangular

blocky structure; friable; few distinct brown (10YR 4/3) clay films on faces of peds;

neutral; clear smooth boundary.

2C—45 to 60 inches; dark yellowish brown (10YR 4/4) and yellowish brown (10YR

5/6), stratified sandy loam, loam, and loamy sand; single grain and massive; very

friable; slightly acid.

Range in Characteristics

Thickness of the loess or other silty material: 20 to 40 inches

Depth to carbonates: More than 40 inches

Thickness of the solum: 36 to 60 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—silt loam

Bt horizon:

Hue—10YR

Value—4 or 5

Chroma—3 or 4

Texture—silty clay loam or silt loam

2Bt horizon:

Hue—7.5YR or 10YR

Value—4 or 5

Chroma—3 to 6

Texture—loam, silt loam, sandy clay loam, sandy loam, or clay loam

Content of gravel—less than 10 percent

2C horizon:

Hue—10YR

Value—3 to 6

Chroma—3 to 6

Texture—loam, silt loam, clay loam, sandy loam, or loamy sand

Content of gravel—less than 15 percent

344B—Harvard silt loam, 2 to 5 percent slopes

Setting

Landform: Stream terraces, outwash plains, and alluvial fans

Position on the landform: Summits

Map Unit Composition

Harvard and similar soils: 95 percent

Dissimilar soils: 5 percent
60 Soil Survey of

Minor Components

Similar soils:

• Soils that have a loess mantle more than 40 inches thick

• Soils that have a thinner and lighter colored surface layer than that of the Harvard

soil

Dissimilar soils:

• The somewhat poorly drained Virgil soils on summits or in the lower positions

Properties and Qualities of the Harvard Soil

Parent material: Loess and outwash

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 9.8 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

Hickory Series

Taxonomic classification: Fine-loamy, mixed, active, mesic Typic Hapludalfs

Typical Pedon

Hickory silt loam, 18 to 35 percent slopes, at an elevation of 247 feet; Bureau County,

Illinois; 320 feet south and 2,520 feet west of the northeast corner of sec. 18, T. 15 N.,

R. 6 E.; USGS Neponset topographic quadrangle; lat. 41 degrees 19 minutes 59

seconds N. and long. 89 degrees 50 minutes 50 seconds W., NAD 27:

A—0 to 4 inches; dark brown (10YR 3/3) silt loam, brown (10YR 5/3) dry; moderate

fine granular structure; friable; common fine and medium roots throughout; 1

percent gravel; slightly acid; clear smooth boundary.

Bt1—4 to 13 inches; dark yellowish brown (10YR 4/4) silty clay loam; weak fine

subangular blocky structure; friable; common fine roots between peds; common

faint brown (7.5YR 4/4) clay films on faces of peds; 2 percent gravel; few fine

rounded black (N 2.5/) concretions of iron-manganese in the matrix; slightly acid;

clear smooth boundary.

2Bt2—13 to 23 inches; dark yellowish brown (10YR 4/4) clay loam; moderate fine and

medium subangular blocky structure; friable; common fine roots between peds;

many faint brown (7.5YR 4/4) clay films on faces of peds; 5 percent gravel; few fine

rounded black (N 2.5/) concretions of iron-manganese in the matrix; neutral; clear

smooth boundary.
Knox County, Illinois 61

2Bt3—23 to 31 inches; dark yellowish brown (10YR 4/4) clay loam; moderate medium

subangular blocky structure; firm; few very fine and fine roots between peds; many

faint brown (7.5YR 4/4) clay films on faces of peds; 3 percent gravel; few fine

rounded black (N 2.5/) concretions of iron-manganese in the matrix; neutral;

gradual wavy boundary.

2Bt4—31 to 40 inches; dark yellowish brown (10YR 4/4) clay loam; weak medium and

coarse subangular blocky structure; firm; few very fine and fine roots between

peds; common faint brown (7.5YR 4/4) clay films on faces of peds; few fine

rounded black (N 2.5/) concretions of iron-manganese in the matrix; 5 percent

gravel; neutral; clear smooth boundary.

2BC—40 to 54 inches; brown (7.5YR 4/4) clay loam; weak coarse subangular blocky

structure; firm; few faint dark reddish brown (5YR 3/3) clay films on faces of peds;

few fine rounded black (N 2.5/) concretions of iron-manganese in the matrix; 5

percent gravel; slightly acid; clear smooth boundary.

2C—54 to 60 inches; yellowish brown (10YR 5/4) clay loam; massive; firm; common

faint brown (7.5YR 4/4) clay films on rocks and along pores; few medium faint

yellowish brown (10YR 5/6) iron masses in the matrix; 4 percent gravel;

effervescent; moderately alkaline.

Range in Characteristics

Thickness of the loess: Less than 20 inches

Depth to the base of the argillic horizon: 40 inches or more

Depth to carbonates: More than 40 inches

Thickness of the solum: Less than 80 inches

Ap or A horizon:

Hue—7.5YR or 10YR

Value—2 to 4

Chroma—2 or 3

Texture—silt loam or loam

E horizon (if it occurs):

Value—4 to 6

Chroma—2 to 4

Texture—silt loam or loam

Bt and 2Bt horizons:

Hue—7.5YR, 10YR, or 2.5Y

Value—4 to 6

Chroma—3 to 6

Texture—clay loam, silty clay loam, loam, or gravelly clay loam

2BC and 2C horizons:

Hue—7.5YR, 10YR, or 2.5Y

Value—5 to 7

Chroma—1 to 8

Texture—loam, clay loam, or sandy loam or the gravelly analogs of these textures

8D2—Hickory silt loam, 10 to 18 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes
62 Soil Survey of

Map Unit Composition

Hickory and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Hickory soil

• Soils that have a surface layer of clay loam

Dissimilar soils:

• The somewhat poorly drained Atlas soils on shoulders and backslopes

Properties and Qualities of the Hickory Soil

Parent material: Loamy till

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.2 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

8F—Hickory silt loam, 18 to 35 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Hickory and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Hickory soil

• Soils that are underlain by sandy material

Dissimilar soils:

• The somewhat poorly drained Atlas soils on shoulders and backslopes

• The well drained Marseilles soils on the lower backslopes

• The well drained Dorchester soils in drainageways and on flood plains
Knox County, Illinois 63

Properties and Qualities of the Hickory Soil

Parent material: Loamy till

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.5 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

8F2—Hickory silt loam, 18 to 35 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Hickory and similar soils: 85 percent

Dissimilar soils: 15 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Hickory soil

• Soils that are underlain by sandy material

Dissimilar soils:

• The somewhat poorly drained Atlas soils on shoulders and backslopes

• The well drained Marseilles soils on the lower backslopes

• The well drained Dorchester soils in drainageways and on flood plains

Properties and Qualities of the Hickory Soil

Parent material: Loamy till

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.
64 Soil Survey of

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

8G—Hickory silt loam, 35 to 60 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Hickory and similar soils: 91 percent

Dissimilar soils: 9 percent

Minor Components

Similar soils:

• Soils that are underlain by sandy material

• Soils that contain less clay in the subsoil than the Hickory soil and are calcareous

within a depth of 20 inches

Dissimilar soils:

• The somewhat poorly drained Atlas soils on shoulders and backslopes

• The well drained Marseilles soils on the lower backslopes

• The somewhat poorly drained Lawson soils in drainageways

Properties and Qualities of the Hickory Soil

Parent material: Loamy till

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.2 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 7e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 65

Huntsville Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Cumulic Hapludolls

Typical Pedon

Huntsville silt loam, 0 to 2 percent slopes, occasionally flooded, at an elevation of 623

feet; Knox County, Illinois; 2,475 feet east and 495 feet south of the northwest corner

of sec. 1, T. 12 N., R. 4 E.; USGS La Fayette topographic quadrangle; lat. 41 degrees

03 minutes 37 seconds N. and long. 89 degrees 59 minutes 42 seconds W., NAD 27:

Ap—0 to 10 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown

(10YR 5/2) dry; weak fine and medium subangular blocky structure; friable; slightly

acid; clear smooth boundary.

A1—10 to 16 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown

(10YR 5/2) dry; weak fine granular structure; friable; common faint very dark

gray (10YR 3/1) organic coatings on faces of peds; neutral; clear smooth

boundary.

A2—16 to 27 inches; dark brown (10YR 3/3) silt loam, brown (10YR 5/3) dry; weak

fine granular structure; friable; common distinct very dark gray (10YR 3/1) organic

coatings on faces of peds; neutral; clear smooth boundary.

AC—27 to 52 inches; brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; weak

medium subangular blocky structure; friable; common distinct very dark grayish

brown (10YR 3/2) organic coatings on faces of peds; neutral; clear smooth

boundary.

C—52 to 60 inches; dark brown (10YR 3/3) silt loam; massive; friable; slightly acid.

Range in Characteristics

Thickness of the mollic epipedon: 24 to 57 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—silt loam

AC horizon:

Hue—10YR

Value—4 or 5

Chroma—3 or 4

Texture—silt loam; silt loam or loam below a depth of 40 inches

C horizon:

Hue—10YR

Value—3 to 5

Chroma—3 or 4

Texture—silt loam; loam or strata of very fine sandy loam to fine sand below a

depth of 40 inches in some pedons

8077A—Huntsville silt loam, 0 to 2 percent slopes,

occasionally flooded

Setting

Landform: Flood plains
66 Soil Survey of

Map Unit Composition

Huntsville and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner surface layer than that of the Huntsville soil and a lighter

colored subsurface layer

• Soils that have less clay than the Huntsville soil

Dissimilar soils:

• The somewhat poorly drained Orion soils in the lower positions on flood plains

• The poorly drained Sawmill soils in the lower positions on flood plains

Properties and Qualities of the Huntsville Soil

Parent material: Alluvium

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 13.4 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Frequency and most likely period of flooding: Occasional, November through June

Potential for frost action: High

Hazard of corrosion: Low for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

Ipava Series

Taxonomic classification: Fine, smectitic, mesic Aquic Argiudolls

Typical Pedon

Ipava silt loam, 0 to 2 percent slopes, at an elevation of 804 feet; Knox County, Illinois;

2,046 feet west and 594 feet north of the southeast corner of sec. 25, T. 13 N., R. 2 E.;

USGS Oneida topographic quadrangle; lat. 41 degrees 04 minutes 40 seconds N. and

long. 90 degrees 13 minutes 03 seconds W., NAD 27:

Ap—0 to 10 inches; black (10YR 2/1) silt loam, dark gray (10YR 4/1) dry; moderate

fine and medium subangular blocky structure; friable; moderately acid; abrupt

smooth boundary.

A—10 to 18 inches; very dark grayish brown (10YR 3/2) silty clay loam, grayish brown

(10YR 5/2) dry; weak fine and medium subangular blocky structure; friable;

common faint black (10YR 2/1) organic coatings on faces of peds; moderately

acid; clear smooth boundary.
Knox County, Illinois 67

BA—18 to 24 inches; brown (10YR 4/3) silty clay loam; moderate fine and medium

subangular blocky structure; friable; common distinct very dark gray (10YR 3/1)

organic coatings on faces of peds; few fine distinct light brownish gray (2.5Y 6/2)

iron depletions and few distinct yellowish brown (10YR 5/6) masses of iron in the

matrix; moderately acid; clear smooth boundary.

Btg1—24 to 31 inches; dark grayish brown (10YR 4/2) silty clay; moderate fine

prismatic structure parting to moderate fine subangular blocky; friable; common

faint dark gray (10YR 4/1) clay films on faces of peds; few fine distinct light

brownish gray (2.5Y 6/2) iron depletions in the matrix and common fine prominent

yellowish brown (10YR 5/8) masses of iron in the matrix; slightly acid; clear

smooth boundary.

Btg2—31 to 37 inches; grayish brown (2.5Y 5/2) silty clay loam; moderate medium

prismatic structure parting to moderate medium angular blocky; friable; common

faint dark gray (10YR 4/1) clay films on faces of peds; common fine faint light

brownish gray (2.5Y 6/2) iron depletions and common medium prominent strong

brown (7.5YR 5/8) masses of iron in the matrix; few fine prominent black (7.5YR

2.5/1) very weakly cemented iron and manganese concretions throughout; few fine

prominent black (7.5YR 2.5/1) iron and manganese stains on faces of peds;

slightly alkaline; gradual smooth boundary.

BCg—37 to 50 inches; grayish brown (2.5Y 5/2) silty clay loam; moderate medium

prismatic structure parting to moderate medium angular blocky; friable; few distinct

very dark grayish brown (10YR 3/2) organo-clay films as linings in pores and on a

few vertical faces of peds; common fine faint light brownish gray (2.5Y 6/2) iron

depletions and common fine prominent strong brown (7.5YR 5/8) masses of iron in

the matrix; few fine prominent black (7.5YR 2.5/1) very weakly cemented iron and

manganese concretions throughout; common fine prominent black (7.5YR 2.5/1)

iron and manganese stains on faces of peds; slightly alkaline; clear smooth

boundary.

Cg—50 to 60 inches; light brownish gray (2.5Y 6/2) silt loam; massive; friable; few

prominent very dark grayish brown (10YR 3/2) organo-clay films as linings in

pores; common fine prominent yellowish brown (10YR 5/8) masses of iron in the

matrix; few fine prominent black (7.5YR 2.5/1) very weakly cemented iron and

manganese concretions throughout; few fine prominent black (7.5YR 2.5/1) iron

and manganese stains on faces of vertical cracks; moderately alkaline.

Range in Characteristics

Thickness of the mollic epipedon: 10 to 24 inches

Depth to the base of the argillic horizon: 35 to 55 inches

Depth to carbonates: More than 40 inches

Ap, A, or AB horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

Texture—silt loam or silty clay loam

Reaction—moderately acid to neutral

BA, Bt, Btg, BC, or BCg horizon:

Hue—10YR or 2.5Y

Value—3 to 6

Chroma—2 to 4

Texture—silty clay loam or silty clay

Reaction—moderately acid to slightly alkaline

Cg or C horizon:

Hue—10YR or 2.5Y
68 Soil Survey of

Value—5 or 6

Chroma—1 to 4

Reaction—slightly acid to moderately alkaline

43A—Ipava silt loam, 0 to 2 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits

Map Unit Composition

Ipava and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer than that of the Ipava soil

• Soils that have a seasonal high water table at a depth of 2 to 4 feet

• Soils that have slopes of 2 to 5 percent

Dissimilar soils:

• The poorly drained Denny and Sable soils in slight depressions on broad flats

Properties and Qualities of the Ipava Soil

Parent material: Loess

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12 inches

Content of organic matter in the surface layer: 4 to 5 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

901B—Ipava-Osco silt loams, 2 to 5 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Ipava—summits; Osco—summits and shoulders
Knox County, Illinois 69

Map Unit Composition

Ipava and similar soils: 50 percent

Osco and similar soils: 35 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer

Dissimilar components:

• The poorly drained Denny and Sable soils in slight depressions on broad flats

• Areas of urban land, including buildings, streets, sidewalks, and parking lots

Properties and Qualities of the Ipava Soil

Parent material: Loess

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12 inches

Content of organic matter in the surface layer: 4 to 5 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.9 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: Ipava—1; Osco—2e

Prime farmland category: Not prime farmland

Hydric soil status: Ipava—not hydric; Osco—not hydric
70 Soil Survey of

902A—Ipava-Sable complex, 0 to 2 percent slopes

Setting

Landform: Ipava—ground moraines; Sable—depressions

Position on the landform: Ipava—summits; Sable—depressions on ground moraines

Map Unit Composition

Ipava and similar soils: 45 percent

Sable and similar soils: 40 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that have a thinner or lighter colored surface layer

• Soils that do not have a seasonal high water table within a depth of 6 feet

Dissimilar components:

• The poorly drained Denny soils in depressions

• Areas of urban land, including buildings, streets, sidewalks, and parking lots

Properties and Qualities of the Ipava Soil

Parent material: Loess

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12 inches

Content of organic matter in the surface layer: 4 to 5 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Properties and Qualities of the Sable Soil

Parent material: Loess

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.9 inches

Content of organic matter in the surface layer: 5 to 6 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: At the surface,

January through May

Ponding depth: 0.2 foot during wet periods

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Negligible
Knox County, Illinois 71

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: Ipava—1; Sable—2w

Prime farmland category: Not prime farmland

Hydric soil status: Ipava—not hydric; Sable—hydric

Keomah Series

Taxonomic classification: Fine, smectitic, mesic Aeric Endoaqualfs

Typical Pedon

Keomah silt loam, 0 to 2 percent slopes, at an elevation of 655 feet; Adams County,

Illinois; 2,495 feet south and 300 feet west of the northeast corner of sec. 4, T. 2 N., R.

7 W.; USGS Lorraine topographic quadrangle; lat. 40 degrees 11 minutes 22 seconds

N. and long. 91 degrees 12 minutes 11 seconds W., NAD 27:

Ap1—0 to 6 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray

(10YR 6/2) dry; weak thick platy structure parting to weak fine subangular blocky;

friable; many very fine and fine roots; moderately acid; abrupt smooth boundary.

Ap2—6 to 11 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray

(10YR 6/2) dry; weak medium platy structure parting to weak fine subangular

blocky; friable; common very fine and fine roots; few distinct brown (7.5YR 4/4)

masses of iron in the matrix; moderately acid; abrupt smooth boundary.

E—11 to 18 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry;

weak medium platy structure parting to weak fine subangular blocky; friable;

common fine roots; few faint dark grayish brown (10YR 4/2) organic coats on faces

of peds and in pores; few prominent strong brown (7.5YR 5/6) masses of iron and

few prominent black (2.5Y 2.5/1) masses of iron and manganese in the matrix; few

faint light gray (10YR 7/2) clay depletions in the matrix; slightly acid; clear smooth

boundary.

Bt1—18 to 25 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate fine subangular blocky; firm; common fine roots;

many faint grayish brown (10YR 5/2) clay films on faces of peds; many prominent

strong brown (7.5YR 5/6) masses of iron and common prominent black (2.5Y

2.5/1) masses of iron and manganese in the matrix; few faint grayish brown (10YR

5/2) iron depletions in the matrix; strongly acid; clear smooth boundary.

Bt2—25 to 33 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate medium subangular blocky; firm; few fine roots;

many faint grayish brown (10YR 5/2) clay films on faces of peds and few faint

pressure faces; many prominent strong brown (7.5YR 5/6) masses of iron and

common prominent black (2.5Y 2.5/1) masses of iron and manganese in the

matrix; strongly acid; clear smooth boundary.

Bt3—33 to 44 inches; brown (10YR 5/3) silty clay loam; weak medium prismatic

structure parting to moderate medium subangular blocky; firm; few very fine roots;

common faint grayish brown (10YR 5/2) clay films on faces of peds; many

prominent strong brown (7.5YR 5/6) masses of iron and common prominent black

(2.5Y 2.5/1) masses of iron and manganese in the matrix; common faint light

brownish gray (10YR 6/2) iron depletions in the matrix; moderately acid; clear

smooth boundary.

Bt4—44 to 51 inches; grayish brown (10YR 5/2) silty clay loam; weak coarse prismatic

structure; firm; few fine roots; few faint dark grayish brown (10YR 4/2) clay films in

root channels and/or pores; many prominent strong brown (7.5YR 5/6) masses of
72 Soil Survey of

iron and few prominent black (2.5Y 2.5/1) masses of iron and manganese in the

matrix; moderately acid; clear smooth boundary.

BC1—51 to 63 inches; grayish brown (10YR 5/2) silt loam; weak coarse prismatic

structure; friable; few very fine roots; common distinct very dark grayish brown

(10YR 3/2) organo-clay films in root channels and/or pores; many prominent

strong brown (7.5YR 5/6) masses of iron and few prominent black (2.5Y 2.5/1)

masses of iron and manganese in the matrix; slightly acid; clear smooth boundary.

BC2—63 to 76 inches; grayish brown (10YR 5/2) silt loam; weak coarse prismatic

structure; friable; common distinct very dark grayish brown (10YR 3/2) organo-clay

films in root channels and/or pores; many prominent strong brown (7.5YR 5/6)

masses of iron and few prominent black (2.5Y 2.5/1) masses of iron and

manganese in the matrix; slightly acid; clear smooth boundary.

C—76 to 89 inches; yellowish brown (10YR 5/4) silt loam; massive; friable; few faint

strong brown (7.5YR 5/6) masses of iron and few prominent black (2.5Y 2.5/1)

masses of iron and manganese in the matrix; common prominent light brownish

gray (10YR 6/2) iron depletions in the matrix; slightly acid.

Range in Characteristics

Depth to the base of the diagnostic horizon: 40 to 76 inches

Ap or A horizon:

Hue—10YR

Value—3 or 4

Chroma—1 or 2

Texture—silt loam

E horizon:

Hue—10YR

Value—4 or 5

Chroma—1 to 3

Texture—silt loam

Bt horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 or 5

Chroma—2 to 4

Texture—silty clay loam or silty clay

BC or C horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 or 5

Chroma—2 to 4

Texture—silty clay loam or silt loam

17A—Keomah silt loam, 0 to 2 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits

Map Unit Composition

Keomah and similar soils: 90 percent

Dissimilar soils: 10 percent
Knox County, Illinois 73

Minor Components

Similar soils:

• Soils that have a darker and thicker surface layer than that of the Keomah soil

• Soils that have a seasonal high water table at a depth of 2 to 4 feet

• Soils that have slopes of more than 2 percent

Dissimilar soils:

• The poorly drained Denny soils in depressions

Properties and Qualities of the Keomah Soil

Parent material: Loess

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Moderately slow or moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.3 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 0.5 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Medium

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2w

Prime farmland category: Prime farmland where drained

Hydric soil status: Not hydric

9017A—Keomah silt loam, terrace, 0 to 2 percent slopes

Setting

Landform: Stream terraces

Position on the landform: Summits

Map Unit Composition

Keomah and similar soils: 94 percent

Dissimilar soils: 6 percent

Minor Components

Similar soils:

• Soils that have a darker and thicker surface layer than that of the Keomah soil

• Soils that have a seasonal high water table at a depth of 2 to 4 feet

• Soils that have slopes of more than 2 percent

Dissimilar soils:

• The poorly drained Denny soils in depressions

Properties and Qualities of the Keomah Soil

Parent material: Loess or other silty material
74 Soil Survey of

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Moderately slow or moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.7 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: High

Depth and months of the highest apparent seasonal high water table: 0.5 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: High

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2w

Prime farmland category: Prime farmland where drained

Hydric soil status: Not hydric

Lawson Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Aquic Cumulic

Hapludolls

Typical Pedon

Lawson silt loam, 0 to 2 percent slopes, occasionally flooded, at an elevation of 695

feet; Bureau County, Illinois; 318 feet south and 1,040 feet east of the northwest corner

of sec. 17, T. 17 N., R. 9 E.; USGS Princeton North topographic quadrangle; lat. 41

degrees 27 minutes 54 seconds N. and long. 89 degrees 29 minutes 14 seconds W.,

NAD 27:

Ap—0 to 11 inches; very dark grayish (10YR 3/2) silt loam, dark grayish brown (10YR

4/2) dry; weak medium granular structure; friable; few fine roots throughout;

neutral; clear smooth boundary.

A1—11 to 19 inches; black (10YR 2/1) silt loam, very dark gray (10YR 3/1) dry;

moderate fine granular structure; friable; few fine roots throughout; neutral; gradual

smooth boundary.

A2—19 to 28 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown

(10YR 4/2) dry; moderate medium granular structure; friable; few fine roots

throughout; neutral; gradual smooth boundary.

C1—28 to 50 inches; dark grayish brown (10YR 4/2) silt loam; weak medium

subangular blocky structure; friable; few fine roots throughout; common faint very

dark grayish brown (10YR 3/2) organic coats on faces of peds; very dark grayish

brown (10YR 3/2) krotovina; few fine faint brown (10YR 4/3) and common fine

prominent yellowish brown (10YR 5/6) iron masses in the matrix; neutral; gradual

smooth boundary.

C2—50 to 60 inches; grayish brown (2.5Y 5/2) silt loam; weak medium subangular

blocky structure; friable; few fine roots; very dark grayish brown (10YR 3/2)

krotovina; common fine faint dark grayish brown (10YR 4/2) iron depletions and

common fine prominent yellowish brown (10YR 5/6) iron masses in the matrix;

neutral.
Knox County, Illinois 75

Range in Characteristics

Thickness of the mollic epipedon: 24 to 36 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

Texture—silt loam

C horizon:

Hue—10YR or 2.5Y

Value—3 to 6

Chroma—1 to 3

Texture—silt loam

3451A—Lawson silt loam, 0 to 2 percent slopes,

frequently flooded

Setting

Landform: Flood plains

Map Unit Composition

Lawson and similar soils: 92 percent

Dissimilar soils: 8 percent

Minor Components

Similar soils:

• Soils that have a thinner surface layer than that of the Lawson soil

• Soils that have a buried soil within a depth of 60 inches

Dissimilar soils:

• The poorly drained Sawmill soils on flood plains

• Soils that contain more clay than the Lawson soil

Properties and Qualities of the Lawson Soil

Parent material: Alluvium

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.1 inches

Content of organic matter in the surface layer: 2 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Frequency and most likely period of flooding: Frequent, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 3w
76 Soil Survey of

Prime farmland category: Prime farmland where protected from flooding or not

frequently flooded during the growing season

Hydric soil status: Not hydric

Lenzburg Series

Taxonomic classification: Fine-loamy, mixed, active, calcareous, mesic Haplic

Udarents

Typical Pedon

Lenzburg silty clay loam, 5 to 10 percent slopes, stony, at an elevation of 721 feet;

Bureau County, Illinois; 200 feet west and 126 feet south of the northeast corner of

sec. 26, T. 16 N., R. 6 E.; USGS Neponset topographic quadrangle; lat. 41 degrees 21

minutes 00 seconds N. and long. 89 degrees 45 minutes 55 seconds W., NAD 27:

A—0 to 3 inches; dark grayish brown (10YR 4/2) and olive gray (5Y 5/2) silty clay

loam, light brownish gray (10YR 6/2) dry; moderate medium granular structure;

friable; common very fine, fine, and medium roots throughout; about 10 percent

fragments of shale; effervescent; slightly alkaline; clear wavy boundary.

C1—3 to 12 inches; yellowish brown (10YR 5/4) and olive gray (5Y 5/2) channery clay

loam; massive; firm; many very fine and fine, common medium, and few coarse

roots; about 20 percent fragments of shale; effervescent; moderately alkaline;

gradual wavy boundary.

C2—12 to 60 inches; yellowish brown (10YR 5/4) and olive gray (5Y 6/2) channery silty

clay loam; massive; firm; many very fine and common fine roots; about 35 percent

fragments of shale; effervescent; slightly alkaline.

Range in Characteristics

A or Ap horizon:

Hue— 10YR, 2.5Y, or 5Y

Value—2 to 5

Chroma—1 to 6

Texture—silt loam, silty clay loam, clay loam, or loam or the gravelly, stony, or

channery analogs of these textures

C horizon:

Hue—7.5YR, 10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 to 4

Texture—loam, silt loam, clay loam, or silty clay loam or the channery, gravelly, or

cobbly analogs of these textures

871B—Lenzburg silty clay loam, 1 to 7 percent slopes

Setting

Landform: Surface-mined land

Position on the landform: Shoulders and summits

Map Unit Composition

Lenzburg and similar soils: 90 percent

Dissimilar components: 10 percent
Knox County, Illinois 77

Minor Components

Similar soils:

• Soils that have rock fragments up to 15 inches in diameter in the surface layer

Dissimilar components:

• Haulage roads and lanes for industry equipment

• Steep escarpments adjacent to final mining cuts

• Trenches and depressions that contain ponded water

Properties and Qualities of the Lenzburg Soil

Parent material: Mine spoil or earthy fill

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.1 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and low for concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

871D—Lenzburg silty clay loam, 7 to 20 percent slopes

Setting

Landform: Surface-mined land

Position on the landform: Shoulders and backslopes

Map Unit Composition

Lenzburg and similar soils: 90 percent

Dissimilar components: 10 percent

Minor Components

Similar soils:

• Soils that have rock fragments up to 15 inches in diameter in the surface layer

Dissimilar components:

• Haulage roads and lanes for industry equipment

• Steep escarpments adjacent to final mining cuts

• Trenches and depressions that contain ponded water

Properties and Qualities of the Lenzburg Soil

Parent material: Mine spoil or earthy fill

Drainage class: Well drained
78 Soil Survey of

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.1 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and low for concrete

Surface runoff class: High

Susceptibility to water erosion: High

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 6e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

871G—Lenzburg silty clay loam, 20 to 60 percent slopes

Setting

Landform: Surface-mined land

Position on the landform: Backslopes

Map Unit Composition

Lenzburg and similar soils: 85 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that have rock fragments up to 15 inches in diameter in the surface layer

Dissimilar components:

• Haulage roads and lanes for industry equipment

• Steep escarpments adjacent to final mining cuts

• Trenches and depressions that contain ponded water

Properties and Qualities of the Lenzburg Soil

Parent material: Mine spoil or earthy fill

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 8.2 inches

Content of organic matter in the surface layer: 0.5 to 4.0 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and low for concrete

Surface runoff class: Very high

Susceptibility to water erosion: High

Susceptibility to wind erosion: Moderate
Knox County, Illinois 79

Interpretive Groups

Land capability classification: 7e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Littleton Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Aquic Cumulic

Hapludolls

Typical Pedon

Littleton silt loam, 0 to 2 percent slopes, at an elevation of 620 feet; Whiteside County,

Illinois; 200 feet north and 1,420 feet east of the southwest corner of sec. 16, T. 20 N.,

R. 4 E.; USGS Erie topographic quadrangle; lat. 41 degrees 42 minutes 52 seconds N.

and long. 90 degrees 02 minutes 57 seconds W., NAD 27:

Ap—0 to 8 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate fine subangular blocky structure parting to moderate fine

granular; friable; few very fine roots throughout; slightly acid; clear smooth

boundary.

A1—8 to 20 inches; very dark gray (10YR 3/1) silt loam, dark gray (10YR 4/1) dry;

moderate fine and very fine subangular blocky structure parting to moderate fine

granular; friable; few fine roots throughout; few very thin strata of brown (10YR 5/3)

silt loam; slightly acid; clear smooth boundary.

A2—20 to 36 inches; black (10YR 2/1) silt loam, dark gray (10YR 4/1) dry; moderate

fine and very fine subangular blocky structure; friable; few fine roots between peds;

slightly acid; gradual smooth boundary.

BA—36 to 52 inches; brown (10YR 5/3) silt loam; moderate medium subangular blocky

structure; friable; many faint grayish brown (10YR 5/2) coats on faces of peds and

in root channels; common distinct very dark gray (10YR 3/1) organic coats on

faces of peds; few fine distinct yellowish brown (10YR 5/6) iron masses in the

matrix; neutral; clear smooth boundary.

Bg—52 to 61 inches; grayish brown (10YR 5/2) silty clay loam; strong medium

prismatic structure; friable; many faint grayish brown (10YR 5/2) coats on faces of

peds; common medium distinct yellowish brown (10YR 5/6) iron masses in the

matrix; few prominent black (N 2.5/) iron-manganese concretions; neutral; clear

smooth boundary.

Cg—61 to 80 inches; grayish brown (10YR 5/2) silt loam; massive; friable; common

medium prominent yellowish brown (10YR 5/6) iron masses in the matrix; few

prominent black (N 2.5/) iron-manganese concretions; neutral.

Range in Characteristics

Thickness of the mollic epipedon: 24 to 36 inches

Thickness of the solum: 30 to 62 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—silt loam

Bg horizon:

Hue—10YR or 2.5Y

Value—3 to 5

Texture—silt loam or silty clay loam
80 Soil Survey of

Cg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—4 to 6

Chroma—1 or 2

Texture—silt loam; thin strata of silty clay loam in some pedons

7081B—Littleton silt loam, 1 to 3 percent slopes, rarely

flooded

Setting

Landform: Stream terraces and alluvial fans

Position on the landform: Summits and footslopes

Map Unit Composition

Littleton and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a thinner subsurface layer than that of the Littleton soil

Dissimilar soils:

• The poorly drained Sawmill soils in the lower positions on flood plains

Properties and Qualities of the Littleton Soil

Parent material: Alluvium

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 13.1 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: Low

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Frequency and most likely period of flooding: Rare, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

Marseilles Series

Taxonomic classification: Fine-silty, mixed, active, mesic Typic Hapludalfs

Typical Pedon

Marseilles silt loam, 35 to 60 percent slopes, at an elevation of 685 feet; Adams

County, Illinois; 1,400 feet south and 1,150 feet east of the northwest corner of sec. 14,
Knox County, Illinois 81

T. 2 S., R. 6 W.; USGS Liberty topographic quadrangle; lat. 39 degrees 53 minutes 57

seconds N. and long. 91 degrees 03 minutes 53 seconds W., NAD 27:

A—0 to 3 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate very fine granular structure; friable; strongly acid; abrupt

smooth boundary.

E—3 to 7 inches; brown (10YR 5/3) silt loam, very pale brown (10YR 7/3) dry;

moderate thin platy and moderate very fine granular structure; friable; very few

faint dark grayish brown (10YR 4/2) organic coats in root channels and/or pores;

strongly acid; clear smooth boundary.

BE—7 to 10 inches; yellowish brown (10YR 5/4) silt loam; weak medium platy and

moderate very fine and fine subangular blocky structure; friable; very few distinct

dark grayish brown (10YR 4/2) organic coats in root channels and/or pores;

strongly acid; clear smooth boundary.

2Bt1—10 to 17 inches; yellowish brown (10YR 5/4) silty clay loam; moderate fine and

medium subangular blocky structure; firm; very few distinct dark grayish brown

(10YR 4/2) organic coats in root channels and/or pores and few faint brown (10YR

5/3) clay films on faces of peds; 1 percent gravel; very strongly acid; clear smooth

boundary.

2Bt2—17 to 22 inches; yellowish brown (10YR 5/4) silty clay loam; strong medium

subangular blocky structure; firm; common faint brown (10YR 5/3) clay films and

very few faint very pale brown (10YR 7/3) silt coats on faces of peds; 1 percent

gravel; very strongly acid; clear smooth boundary.

2Bt3—22 to 35 inches; light olive brown (2.5Y 5/4) silty clay loam; moderate medium

and coarse subangular blocky structure; firm; very few faint brown (10YR 5/3) clay

films and very few distinct very pale brown (10YR 7/3) silt coats on faces of peds;

1 percent gravel; very strongly acid; gradual smooth boundary.

2Cr—35 to 60 inches; 70 percent light olive brown (2.5Y 5/4) and 30 percent olive (5Y

5/3) silty clay and unweathered bedrock; massive; firm; 10 percent shale gravel;

very strongly acid.

Range in Characteristics

Depth to the base of the argillic horizon: 20 to 40 inches

Depth to paralithic contact: 20 to 40 inches

Ap or A horizon:

Hue—10YR

Value—2 to 5

Chroma—2 or 3

Texture—silt loam or silty clay loam

E or BE horizon:

Hue—10YR

Value—4 or 5

Chroma—2 to 4

Texture—silt loam

Bt horizon:

Hue—10YR

Value—4 or 5

Chroma—3 to 6

Texture—silty loam or silty clay loam

2Bt horizon:

Hue—7.5YR to 2.5Y

Value—4 to 6
82 Soil Survey of

Chroma—2 to 4

Texture—clay loam, silt loam, silty clay loam, or silty clay

2Cr horizon:

Hue—10YR, 2.5Y, 5Y, or N

Value—4 to 6

Chroma—0 to 4

549D2—Marseilles silt loam, 10 to 18 percent slopes,

eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Marseilles and similar soils: 94 percent

Dissimilar soils: 6 percent

Minor Components

Similar soils:

• Soil that have more clay in the surface layer and subsoil than the Marseilles soil

• Soils that formed in calcareous shale

• Soils that are underlain by sand, sandstone, or limestone

• Soils that have slopes of less than 10 percent

Dissimilar soils:

• The somewhat poorly drained Atlas soils on backslopes

• The moderately well drained Elco soils on backslopes

• The well drained Hickory soils on backslopes

Properties and Qualities of the Marseilles Soil

Parent material: Thin layer of loess over material weathered from shale

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Very slow

Permeability below a depth of 60 inches: Very slow

Depth to restrictive feature: 20 to 40 inches to bedrock (paralithic)

Available water capacity to a depth of 60 inches: About 4.4 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Very high

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 83

549F—Marseilles silt loam, 18 to 35 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Marseilles and similar soils: 94 percent

Dissimilar soils: 6 percent

Minor Components

Similar soils:

• Soils that have more clay in the surface layer and subsoil than the Marseilles soil

• Soils that formed in calcareous shale

• Soils that are underlain by sand, sandstone, or limestone

• Soils that have a thinner mantle of loess over the underlying shale

Dissimilar soils:

• The moderately well drained Elco soils on backslopes

• The well drained Hickory soils on backslopes

• The somewhat poorly drained Lawson and Orion soils on flood plains

Properties and Qualities of the Marseilles Soil

Parent material: Thin layer of loess over material weathered from shale

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Very slow

Permeability below a depth of 60 inches: Very slow

Depth to restrictive feature: 20 to 40 inches to bedrock (paralithic)

Available water capacity to a depth of 60 inches: About 5.7 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Very high

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 7e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

549G—Marseilles silt loam, 35 to 60 percent slopes

Setting

Landform: Ground moraines (fig. 4)

Position on the landform: Backslopes

Map Unit Composition

Marseilles and similar soils: 97 percent

Dissimilar soils: 3 percent
84 Soil Survey of

Minor Components

Similar soils:

• Soils that have more clay in the surface layer and subsoil than the Marseilles soil

• Soils that formed in calcareous shale

• Soils that are underlain by sand, sandstone, or limestone

Dissimilar soils:

• The well drained Hickory soils on backslopes

• The somewhat poorly drained Lawson and Orion soils on flood plains

Properties and Qualities of the Marseilles Soil

Parent material: Thin layer of loess over material weathered from shale

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Very slow

Permeability below a depth of 60 inches: Very slow or slow

Depth to restrictive feature: 20 to 40 inches to bedrock (paralithic)

Available water capacity to a depth of 60 inches: About 5.7 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Flooding: None

Figure 4.—A wooded area of Marseilles silt loam, 35 to 60 percent slopes.
Knox County, Illinois 85

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Very high

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 7e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

M-W—Miscellaneous water

• This map unit consists of bodies of water used primarily for municipal or agricultural

waste treatment lagoons. Included in mapping are established earth berms around

the lagoon.

Orion Series

Taxonomic classification: Coarse-silty, mixed, superactive, nonacid, mesic Aquic

Udifluvents

Typical Pedon

Orion silt loam, 0 to 2 percent slopes, frequently flooded, at an elevation of 234 feet;

Whiteside County, Illinois; 270 feet south and 1,000 feet east of the northwest corner

of sec. 17, T. 22 N., R. 6 E.; USGS Milledgeville topographic quadrangle; 41 degrees

54 minutes 06 seconds N. and long. 89 degrees 50 minutes 13 seconds W., NAD 27:

A—0 to 5 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR

6/2) dry; massive; friable; many thin strata of brown (10YR 4/3) and very dark gray

(10YR 3/1) silt loam; neutral; abrupt smooth boundary.

C1—5 to 15 inches; dark grayish brown (10YR 4/2) silt loam; massive; friable; many

thin strata of pale brown (10YR 6/3) and yellowish brown (10YR 5/4) silt loam; few

fine distinct brown (7.5YR 4/4) masses of iron in the matrix; neutral; clear wavy

boundary.

C2—15 to 29 inches; dark grayish brown (10YR 4/2) silt loam; massive; friable; many

thin strata of dark yellowish brown (10YR 4/4), yellowish brown (10YR 5/6), and

pale brown (10YR 6/3) silt loam; few very dark gray (10YR 3/1) wormcasts; few

fine distinct brown (7.5YR 4/4) masses of iron in the matrix; neutral; abrupt wavy

boundary.

Ab1—29 to 39 inches; black (2.5Y 2.5/1) silt loam; weak thick platy structure parting to

weak medium and fine subangular blocky; friable; neutral; clear smooth boundary.

Ab2—39 to 51 inches; black (2.5Y 2.5/1) silty clay loam; strong medium and fine

angular blocky structure; friable; neutral; clear smooth boundary.

Ab3—51 to 60 inches; very dark gray (10YR 3/1) silty clay loam; moderate medium

and fine subangular blocky structure; friable; neutral.

Range in Characteristics

Depth to the dark buried soil: 20 to 40 inches

Thickness of the surface layer: 5 to 10 inches

Ap or A horizon:

Hue—10YR

Value—3 to 6
86 Soil Survey of

Chroma—2 or 3

Texture—silt loam; stratified in some pedons

C horizon:

Hue—10YR

Value—3 to 5

Chroma—2 or 3

Texture—silt loam; stratified in some pedons

Ab horizon:

Hue—10YR or 2.5Y

Value—2 to 3

Chroma—1 or 2

Texture—silty clay loam or silt loam; stratified in some pedons

3415A—Orion silt loam, 0 to 2 percent slopes, frequently

flooded

Setting

Landform: Flood plains

Map Unit Composition

Orion and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a darker and thicker surface layer than that of the Orion soil

• Soils that do not have a buried soil within a depth of 40 inches

Dissimilar soils:

• The poorly drained Sawmill and well drained Huntsville soils on flood plains

Properties and Qualities of the Orion Soil

Parent material: Alluvium

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.3 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Low

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Frequency and most likely period of flooding: Frequent, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 3w
Knox County, Illinois 87

Prime farmland category: Prime farmland where protected from flooding or not

frequently flooded during the growing season

Hydric soil status: Not hydric

801B—Orthents, silty, undulating

Setting

Landform: Ground moraines

Map Unit Composition

Orthents and similar soils: 85 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that are covered with as much as 2 feet of coarser textured fill material

• Soils that contain more than 15 percent sand

Dissimilar components:

• Urban land and borrow areas along major highways

• Undisturbed areas of the well drained Osco, somewhat poorly drained Ipava, and

poorly drained Sable soils

• Areas around interstate cloverleaf interchanges that are more sloping than the

Orthents

Properties and Qualities of the Orthents

Parent material: Mine spoil or earthy fill

Drainage class: Moderately well drained or somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow or moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12 inches

Content of organic matter in the surface layer: 0.2 to 1.0 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Moderate

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

802B—Orthents, loamy, undulating

Setting

Landform: Ground moraines
88 Soil Survey of

Map Unit Composition

Orthents and similar soils: 85 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that are covered with as much as 2 feet of coarser textured fill material

• Soils that contain less than 15 percent sand

Dissimilar components:

• Steep areas of escarpments associated with sanitary landfill cut and fill areas

Properties and Qualities of the Orthents

Parent material: Mine spoil or earthy fill

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderately slow

Permeability below a depth of 60 inches: Moderately slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 10.9 inches

Content of organic matter in the surface layer: 0.5 to 2.0 percent

Shrink-swell potential: Moderate

Flooding: None

Potential for frost action: Moderate

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Osco Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Argiudolls

Taxadjunct features: The Osco soils in map units 86B2, 86C2, and 86D2 have a

thinner dark surface layer than is defined as the range for the series. This

difference, however, does not significantly affect the use and management of the

soils. These soils are classified as fine-silty, mixed, superactive, mesic Mollic

Hapludalfs.

Typical Pedon

Osco silt loam, 2 to 5 percent slopes, at an elevation of 858 feet; Carroll County,

Illinois; 316 feet north and 88 feet west of the southeast corner of sec. 23, T. 24 N., R.

6 E.; USGS Lanark topographic quadrangle; lat. 42 degrees 03 minutes 15 seconds N.

and long. 89 degrees 45 minutes 52 seconds W., NAD 27:

Ap—0 to 10 inches; very dark brown (10YR 2/2) silt loam, very dark grayish brown

(10YR 3/2) dry; moderate fine granular structure; friable; common fine roots;

slightly acid; abrupt smooth boundary.
Knox County, Illinois 89

A—10 to 14 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown

(10YR 4/2) dry; moderate medium or coarse granular structure; friable; common fine

roots; strongly acid; clear smooth boundary.

BA—14 to 20 inches; dark yellowish brown (10YR 3/4) and dark brown (10YR 3/3) silt

loam, brown (10YR 5/3) dry; weak fine subangular blocky structure; friable;

common fine roots; few distinct light brownish gray (10YR 6/2) (dry) silt coats on

faces of peds; strongly acid; clear smooth boundary.

Bt1—20 to 26 inches; brown (10YR 4/3) silty clay loam; moderate fine subangular

blocky structure; friable; few fine roots; few distinct gray (10YR 6/1) (dry) silt coats

and common faint dark brown (10YR 3/3) clay films on faces of peds; strongly

acid; clear smooth boundary.

Bt2—26 to 37 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate

medium subangular blocky structure; firm; few fine roots; common distinct light

brownish gray (10YR 6/2) (dry) silt coats and many faint dark yellowish brown

(10YR 4/4) clay films on faces of peds; common fine faint brown (10YR 5/3) and

common medium prominent strong brown (7.5YR 5/8) redoximorphic

concentrations; many prominent very dark gray (N 3/0) and many distinct dark

brown (7.5YR 3/2) manganese concretions; strongly acid; clear smooth boundary.

Bt3—37 to 45 inches; light yellowish brown (10YR 6/4) silty clay loam; moderate

coarse subangular blocky structure; friable; few fine roots; many faint dark

yellowish brown (10YR 4/4) clay films on faces of peds; common fine distinct light

brownish gray (10YR 6/2) redoximorphic depletions and few medium prominent

strong brown (7.5YR 5/8) redoximorphic concentrations; strongly acid; gradual

smooth boundary.

BC—45 to 55 inches; yellowish brown (10YR 5/4) and brown (10YR 4/3) silty clay loam;

weak coarse angular blocky structure; friable; few fine distinct light brownish gray

(10YR 6/2) redoximorphic depletions; strongly acid; gradual smooth boundary.

C—55 to 60 inches; yellowish brown (10YR 5/4) and brown (10YR 4/3) silt loam;

massive; friable; many fine distinct yellowish brown (10YR 5/6) redoximorphic

concentrations and common medium distinct grayish brown (10YR 5/2)

redoximorphic depletions; moderately acid.

Range in Characteristics

Thickness of the mollic epipedon: 10 to 18 inches

Thickness of the solum: 40 to more than 60 inches

Depth to free carbonates: More than 48 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

Texture—silt loam or silty clay loam

Bt horizon:

Hue—10YR

Value—4 to 6

Chroma—3 or 4

Texture—silty clay loam or silt loam

C or Cg horizon:

Hue—10YR or 2.5Y

Value—4 or 5

Chroma—2 to 6

Texture—silt loam
90 Soil Survey of

86B—Osco silt loam, 2 to 5 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits and shoulders

Map Unit Composition

Osco and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco soil

• Soils that do not have a seasonal high water table within a depth of 6 feet

Dissimilar soils:

• The poorly drained Denny soils in depressions

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.9 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

86B2—Osco silt loam, 2 to 5 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and summits

Map Unit Composition

Osco and similar soils: 88 percent

Dissimilar soils: 12 percent
Knox County, Illinois 91

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco soil

• Soils that do not have a seasonal high water table within a depth of 6 feet

• Soils that have a thinner subsoil than that of the Osco soil and are calcareous within

40 inches of the surface

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

• The poorly drained Denny soils in depressions

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.8 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

86C—Osco silt loam, 5 to 10 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Backslopes and shoulders

Map Unit Composition

Osco and similar soils: 85 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco

soil

• Soils that do not have a seasonal high water table within a depth of 6 feet
92 Soil Survey of

• Soils that have a thinner subsoil than that of the Osco soil and are calcareous within

40 inches of the surface

• Soils that have more sand or clay in the lower part than the Osco soil

Dissimilar components:

• Areas of urban land, including buildings, streets, sidewalks, and parking lots

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.9 inches

Content of organic matter in the surface layer: 2 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

86C2—Osco silt loam, 5 to 10 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes and shoulders

Map Unit Composition

Osco and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco soil

• Soils that do not have a seasonal high water table within a depth of 6 feet

• Soils that have more sand or clay in the lower part than the Osco soil

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate
Knox County, Illinois 93

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.7 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

86D2—Osco silt loam, 10 to 18 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Osco and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco soil

• Soils that do not have a seasonal high water table within a depth of 6 feet

• Soils that have a thinner subsoil than that of the Osco soil and are calcareous within

40 inches of the surface

• Soils that have more sand or clay in the lower part than the Osco soil

Dissimilar soils:

• The somewhat poorly drained Radford soils in drainageways

Properties and Qualities of the Osco Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.7 inches

Content of organic matter in the surface layer: 2 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None
94 Soil Survey of

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

9086B—Osco silt loam, terrace, 2 to 5 percent slopes

Setting

Landform: Stream terraces

Position on the landform: Summits and shoulders

Map Unit Composition

Osco and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thinner and lighter colored surface layer than that of the Osco soil

• Soils that do not have a seasonal high water table within a depth of 6 feet

Dissimilar soils:

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Osco Soil

Parent material: Loess or other silty material

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.8 inches

Content of organic matter in the surface layer: 3 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 95

863—Pits, clay

• This map unit consists of excavated areas of Pennsylvanian shale from which clayey

soil material has been removed. The remaining floors are nearly level, and sidewalls

are very steep or nearly vertical.

864—Pits, quarries

• This map unit consists of excavated areas of limestone bedrock from which material

has been removed. The remaining floors are nearly level, and sidewalls are very

steep or nearly vertical.

865—Pits, gravel

• This map unit consists of excavated areas of gravelly outwash deposits from which

gravelly material has been removed. The remaining floors are nearly level, and

sidewalls are very steep or nearly vertical.

Radford Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Fluvaquentic Hapludolls

Typical Pedon

Radford silt loam, 0 to 2 percent slopes, occasionally flooded, at an elevation of 220

feet; Bureau County, Illinois; 1,109 feet west and 1,254 feet south of the northeast

corner of sec. 23, T. 17 N., R. 8 E.; USGS Buda NE topographic quadrangle; lat. 41

degrees 26 minutes 54 seconds N. and long. 89 degrees 32 minutes 04 seconds W.,

NAD 27:

Ap—0 to 9 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate medium granular structure; friable; common fine roots;

moderately acid; abrupt smooth boundary.

A—9 to 21 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate medium granular structure; friable; common fine roots; few fine

dark masses of iron and manganese throughout; slightly acid; gradual smooth

boundary.

C—21 to 29 inches; stratified very dark gray (10YR 3/1) silt loam and brown (10YR

5/3) silty clay loam; weak medium subangular blocky structure; friable; few fine

roots; common fine dark masses of iron and manganese throughout; slightly acid;

clear smooth boundary.

Ab1—29 to 36 inches; black (10YR 2/1) silty clay loam; moderate medium subangular

blocky structure; friable; few fine roots; few medium faint very dark grayish brown

(10YR 3/2) masses of iron and manganese in the matrix; few very fine dark

masses of iron and manganese throughout; slightly acid; clear smooth boundary.

Ab2—36 to 43 inches; black (10YR 2/1) silty clay loam; weak medium subangular

blocky structure; friable; few fine faint very dark grayish brown (10YR 3/2) masses

of iron and manganese in the matrix; few very fine dark masses of iron and

manganese throughout; neutral; clear smooth boundary.

Bgb—43 to 60 inches; very dark gray (10YR 3/1) silty clay loam; moderate medium

prismatic structure parting to moderate medium subangular blocky; friable; few fine

faint dark gray (10YR 4/1) iron depletions in the matrix; few very fine dark masses

of iron and manganese throughout; neutral.
96 Soil Survey of

Range in Characteristics

Thickness of the mollic epipedon: 10 to 24 inches

Depth to the buried soil: 20 to 40 inches

Ap or A horizon:

Value—2 or 3

Chroma—1 or 2

C horizon:

Hue—10YR

Value—2 to 6

Chroma—1 to 4

Texture—silt loam or silty clay loam

Ab horizon:

Hue—10YR or N

Value—2 or 3

Chroma—0 or 1

Texture—silt loam, silty clay loam, clay loam, or loam

Bgb horizon (if it occurs):

Hue—10YR, 2.5Y, 5Y, or N

Value—3 to 6

Chroma—0 to 2

3074A—Radford silt loam, 0 to 2 percent slopes,

frequently flooded

Setting

Landform: Flood plains

Map Unit Composition

Radford and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a buried soil at a depth of more than 40 inches

• Soils that have a light-colored surface layer

Dissimilar soils:

• The poorly drained Sawmill soils in the lower positions on flood plains

• The well drained Huntsville soils in the higher positions on flood plains

Properties and Qualities of the Radford Soil

Parent material: Alluvium

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.3 inches

Content of organic matter in the surface layer: 2 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May
Knox County, Illinois 97

Frequency and most likely period of flooding: Frequent, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3w

Prime farmland category: Prime farmland where protected from flooding or not

frequently flooded during the growing season

Hydric soil status: Not hydric

Rapatee Series

Taxonomic classification: Fine-silty, mixed, superactive, nonacid, mesic Mollic

Udarents

Typical Pedon

Rapatee silty clay loam, 2 to 5 percent slopes, at an elevation of 800 feet; Knox

County, Illinois; 1,460 feet west and 2,300 feet north of the southeast corner of sec. 11,

T. 12 N., R. 3 E.; USGS Victoria topographic quadrangle; lat. 41 degrees 02 minutes 23

seconds N. and long. 90 degrees 07 minutes 20 seconds W., NAD 27:

Ap—0 to 3 inches; mixed black (10YR 2/1) and very dark gray (10YR 3/1) silty clay

loam, dark gray (10YR 4/1) and gray (10YR 5/1) dry; moderate very fine

subangular blocky structure; friable; common fine and very fine roots; some mixing

and horizontal strata of yellowish brown (10YR 5/4 and 5/8) and grayish brown

(10YR 5/2) material; about 2 percent sand; slightly acid; clear smooth boundary.

C1—3 to 18 inches; mixed black (10YR 2/1) and very dark gray (10YR 3/1) silty clay

loam, dark gray (10YR 4/1) and gray (10YR 5/1) dry; massive; firm; common fine

roots; few moderate medium and coarse clods or soil fragments; some mixing and

horizontal strata of yellowish brown (10YR 5/4 and 5/8) and grayish brown (10YR

5/2) material; few distinct dark stains and few fine rounded black concretions of

iron and manganese; about 2 percent sand; slightly acid; abrupt wavy boundary.

C2—18 to 48 inches; mixed dark yellowish brown (10YR 4/4) and yellowish brown

(10YR 5/4) silty clay loam; massive; very dense, very firm; few weak coarse clods

or soil fragments; few pockets of dark olive gray (5Y 3/2) silty clay loam; common

fine rounded black concretions of iron and manganese; about 8 percent sand;

slightly alkaline; abrupt wavy boundary.

C3—48 to 60 inches; mixed brown (10YR 4/3), yellowish brown (10YR 5/4 and 5/6),

and greenish gray (5G 5/1) clay loam; massive; extremely dense, very firm; few

weak medium and coarse clods or soil fragments; common distinct dark stains

and common fine black concretions of iron and manganese; about 14 percent

sand; common fragments of coal and shale; common dolomitic till pebbles;

strongly effervescent; slightly alkaline.

Range in Characteristics

Ap and C1 horizons (in place):

Hue—10YR

Value—2 or 3

Chroma—1 to 3

Texture—silt loam or silty clay loam

Reaction—slightly acid or neutral
98 Soil Survey of

C2 horizon:

Hue—10YR, 2.5Y, 5Y, 5G, 5GY, or 5BG

Value—4 to 6

Value—1 to 8

Texture—silt loam or silty clay loam

C3 horizon:

Hue—10YR, 2.5Y, 5Y, 5G, 5GY, or 5BG

Value—4 to 6

Value—1 to 8

Texture—loam, clay loam, silt loam, or silty clay loam or the channery or gravelly

analogs of these textures

872B—Rapatee silty clay loam, 2 to 5 percent slopes

Setting

Landform: Surface-mined land

Position on the landform: Summits and shoulders

Map Unit Composition

Rapatee and similar soils: 85 percent

Dissimilar components: 15 percent

Minor Components

Similar soils:

• Soils that have mine spoil material at the surface

Dissimilar components:

• Undisturbed areas of the well drained Osco, somewhat poorly drained Ipava, and

poorly drained Sable soils adjacent to mined areas

• Steep areas adjacent to pits and final mining cuts

• Soils in depressions that are commonly ponded

Properties and Qualities of the Rapatee Soil

Parent material: Mine spoil or earthy fill

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Slow

Permeability below a depth of 60 inches: Very slow

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 7.3 inches

Content of organic matter in the surface layer: 2 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest perched seasonal high water table: 3.5 feet,

February through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and low for concrete

Surface runoff class: Medium

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e
Knox County, Illinois 99

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

Rozetta Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Hapludalfs

Typical Pedon

Rozetta silt loam, 0 to 2 percent slopes, at an elevation of 890 feet; Stephenson

County, Illinois; 150 feet south and 500 feet east of the center of sec. 18, T. 27 N., R. 6

E.; USGS Pearl City topographic quadrangle; lat. 42 degrees 20 minutes 00 seconds

N. and long. 89 degrees 51 minutes 19 seconds W., NAD 27:

A—0 to 4 inches; very dark gray (10YR 3/1) silt loam, gray (10YR 6/1) dry; weak

medium granular structure; friable; many fine roots throughout; moderately acid;

clear wavy boundary.

E—4 to 11 inches; dark grayish brown (10YR 4/2) silt loam; weak medium platy

structure; friable; many fine roots throughout; strongly acid; clear smooth

boundary.

BE—11 to 14 inches; brown (10YR 4/3) silty clay loam; weak medium subangular

blocky structure; firm; many fine roots between peds; few faint brown (10YR 5/3)

(dry) clay depletions on faces of peds; strongly acid; clear smooth boundary.

Bt1—14 to 21 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate fine

and medium subangular blocky structure; firm; many fine roots between peds;

many faint brown (10YR 5/3) clay films on faces of peds; strongly acid; clear

smooth boundary.

Bt2—21 to 39 inches; brown (10YR 5/3) silty clay loam; moderate medium and coarse

subangular blocky structure; firm; many faint dark yellowish brown (10YR 4/4) clay

films on faces of peds; few medium faint grayish brown (10YR 5/2) iron depletions;

common medium faint light yellowish brown (10YR 6/4) and brown (10YR 4/3)

masses of iron in the matrix; strongly acid; clear smooth boundary.

Bt3—39 to 50 inches; yellowish brown (10YR 5/4) silty clay loam; weak coarse

subangular blocky structure; firm; few faint brown (10YR 4/3) clay films on faces of

peds; common medium distinct grayish brown (10YR 5/2) iron depletions; common

medium faint pale brown (10YR 6/3) masses of iron in the matrix; moderately acid;

clear smooth boundary.

C—50 to 60 inches; yellowish brown (10YR 5/4) silt loam; massive; friable; common

medium distinct dark grayish brown (10YR 4/2) iron depletions; slightly acid.

Range in Characteristics

Thickness of the solum: 42 to 72 inches

Ap or A horizon:

Hue—10YR

Value—3 to 5

Chroma—1 to 3

Texture—silt loam or silty clay loam

E horizon:

Hue—10YR

Value—4 to 6

Chroma—2 or 3

Texture—silt loam
100 Soil Survey of

Bt horizon:

Hue—7.5YR or 10YR

Value—4 to 6

Chroma—3 to 6

Texture—silty clay loam

C horizon:

Hue—10YR

Value—4 to 6

Chroma—2 to 6

Texture—silt loam or silty clay loam

279B—Rozetta silt loam, 2 to 5 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Shoulders and summits

Map Unit Composition

Rozetta and similar soils: 91 percent

Dissimilar soils: 9 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Rozetta soil

• Soils that have a seasonal high water table at a depth of less than 4 feet or more

than 6 feet

Dissimilar soils:

• The poorly drained Denny soils in depressions

Properties and Qualities of the Rozetta Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.3 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric
Knox County, Illinois 101

279C2—Rozetta silt loam, 5 to 10 percent slopes, eroded

Setting

Landform: Ground moraines

Position on the landform: Shoulders and backslopes

Map Unit Composition

Rozetta and similar soils: 94 percent

Dissimilar soils: 6 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Rozetta soil

• Soils that have a seasonal high water table at a depth of less than 4 feet or more

than 6 feet

• Soils that are calcareous within 40 inches of the surface

• Soils that are underlain by clayey till within a depth of 60 inches

• Soils that have slopes of more than 10 percent

Dissimilar soils:

• The somewhat poorly drained Clarksdale soils on summits and in low areas

Properties and Qualities of the Rozetta Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.4 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

9279B—Rozetta silt loam, terrace, 2 to 5 percent slopes

Setting

Landform: Stream terraces

Position on the landform: Shoulders and summits
102 Soil Survey of

Map Unit Composition

Rozetta and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Rozetta soil

• Soils that have a seasonal high water table at a depth of less than 4 feet or more

than 6 feet

Dissimilar soils:

• Soils that are subject to rare flooding; on footslopes

Properties and Qualities of the Rozetta Soil

Parent material: Loess or other silty material

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.2 inches

Content of organic matter in the surface layer: 1 to 3 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Low

Susceptibility to water erosion: Moderate

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2e

Prime farmland category: Prime farmland

Hydric soil status: Not hydric

9279C2—Rozetta silt loam, terrace, 5 to 10 percent

slopes, eroded

Setting

Landform: Terraces

Position on the landform: Shoulders and backslopes

Map Unit Composition

Rozetta and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a darker surface layer than that of the Rozetta soil

• Soils that have a seasonal high water table at a depth of less than 4 feet or more

than 6 feet

• Soils that are calcareous within 40 inches of the surface
Knox County, Illinois 103

• Soils that are underlain by clayey till within a depth of 60 inches

• Soils that have slopes of more than 10 percent

Dissimilar soils:

• The somewhat poorly drained Clarksdale soils on summits and in low areas

Properties and Qualities of the Rozetta Soil

Parent material: Loess or other silty material

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.2 inches

Content of organic matter in the surface layer: 1 to 2 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 4 feet, February

through April

Flooding: None

Accelerated erosion: This soil has lost 25 to 75 percent of the original surface layer. In

most areas the subsoil is mixed with the surface layer.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Sable Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Endoaquolls

Typical Pedon

Sable silty clay loam, 0 to 2 percent slopes, at an elevation of 732 feet; Warren County,

Illinois; 1,281 feet south and 97 feet west of the northeast corner of sec. 14, T. 9 N., R.

3 W.; USGS Kirkwood East topographic quadrangle; lat. 40 degrees 46 minutes 30

seconds N. and long. 90 degrees 41 minutes 32 seconds W., NAD 27:

Ap—0 to 8 inches; black (10YR 2/1) silty clay loam, dark gray (10YR 4/1) dry;

moderate fine and medium granular structure; firm; moderately acid; abrupt

smooth boundary.

A—8 to 19 inches; black (10YR 2/1) silty clay loam, dark gray (10YR 4/1) dry;

moderate very fine angular blocky structure; firm; few fine rounded dark

concretions of iron and manganese oxides; slightly acid; clear smooth boundary.

AB—19 to 23 inches; very dark gray (10YR 3/1) silty clay loam, grayish brown (10YR

5/2) dry; moderate fine angular blocky structure; firm; few faint dark grayish brown

(10YR 3/2) organic coats on faces of peds; few fine dark rounded concretions of

iron and manganese; clear smooth boundary.

Bg—23 to 29 inches; dark gray (10YR 4/1) silty clay loam; moderate fine and medium

subangular blocky structure; firm; common faint very dark gray (10YR 3/1) organic

coats on faces of peds; common fine and medium dark rounded concretions of

iron and manganese oxides; common medium distinct brown (10YR 5/3) masses
104 Soil Survey of

of iron in the matrix; few medium faint dark grayish brown (10YR 4/2) iron

depletions; neutral; clear smooth boundary.

Btg1—29 to 38 inches; grayish brown (2.5Y 5/2) silty clay loam; moderate medium and

coarse subangular blocky structure; firm; few faint dark gray (10YR 4/1) clay films

on faces of peds; many fine and medium dark rounded concretions of iron and

manganese; many medium prominent yellowish brown (10YR 5/6) masses of iron

in the matrix; neutral; clear wavy boundary.

Btg2—38 to 47 inches; gray (N 5/) silt loam; weak medium prismatic structure parting

to weak medium and coarse angular blocky; firm; few prominent grayish brown

(10YR 5/2) clay films on faces of peds; common fine dark rounded concretions of

iron and manganese; many medium prominent yellowish brown (10YR 5/6)

masses of iron in the matrix; slightly alkaline; gradual smooth boundary.

Cg—47 to 60 inches; gray (N 5/) silt loam; massive; friable; many fine prominent

yellowish brown (10YR 5/6) masses of iron in the matrix; slightly effervescent;

slightly alkaline.

Range in Characteristics

Thickness of the mollic epipedon: 12 to 24 inches

Thickness of the solum: 40 to 60 inches

Ap or A horizon:

Hue—10YR to 5Y or N

Value—2 or 3

Chroma—0 or 1

Texture—silty clay loam or silt loam

Bg or Btg horizon:

Hue—10YR to 5Y or N

Value—3 to 6

Chroma—0 to 2

Texture—silty clay loam or silt loam

Cg horizon:

Hue—10YR to 5Y or N

Value—4 to 6

Chroma—0 to 2

Texture—silt loam or silty clay loam

68A—Sable silty clay loam, 0 to 2 percent slopes

Setting

Landform: Ground moraines

Position on the landform: Summits

Map Unit Composition

Sable and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a seasonal high water table at a depth of 1 to 3 feet

• Soils that have a thinner surface layer than that of the Sable soil and have more clay

in the subsoil
Knox County, Illinois 105

Dissimilar soils:

• The well drained Osco soils on summits

Properties and Qualities of the Sable Soil

Parent material: Loess

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.9 inches

Content of organic matter in the surface layer: 5 to 6 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: At the surface,

January through May

Ponding depth: 0.2 foot during wet periods

Flooding: None

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 2w

Prime farmland category: Prime farmland where drained

Hydric soil status: Hydric

Sawmill Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Cumulic Endoaquolls

Typical Pedon

Sawmill silty clay loam, 0 to 2 percent slopes, frequently flooded, at an elevation of 535

feet; Sangamon County, Illinois; 300 feet south and 750 feet east of the northwest

corner of sec. 20, T. 15 N., R. 4 W.; USGS New City topographic quadrangle; lat. 39

degrees 44 minutes 34 seconds N. and long. 89 degrees 34 minutes 15 seconds W.,

NAD 27:

Ap—0 to 10 inches; very dark gray (10YR 3/1) and very dark grayish brown (10YR

3/2) silty clay loam, gray (10YR 5/1) dry; weak fine subangular blocky structure;

firm; few fine roots throughout; few subrounded pebbles 1 to 3 mm in diameter;

slightly acid; clear smooth boundary.

A1—10 to 17 inches; black (10YR 2/1) and very dark grayish brown (10YR 3/2) silty

clay loam, dark gray (10YR 4/1) dry; moderate fine subangular blocky structure;

firm; few fine roots between peds; few subrounded pebbles 1 to 3 mm in diameter;

few fine prominent yellowish brown (10YR 5/6) masses of iron in the matrix; few

fine concretions of manganese lining root channels and pores; neutral; clear

smooth boundary.

A2—17 to 25 inches; black (10YR 2/1) silty clay loam, dark gray (10YR 4/1) dry;

moderate fine and medium angular blocky structure; firm; few fine roots between

peds; few fine concretions of manganese lining root channels and pores; few fine

prominent yellowish brown (10YR 5/6) masses of iron in the matrix; neutral; clear

smooth boundary.
106 Soil Survey of

AB—25 to 32 inches; very dark gray (10YR 3/1) silty clay loam, gray (10YR 5/1) dry;

weak medium prismatic structure parting to moderate fine subangular blocky; firm;

few fine roots between peds; few fine concretions of manganese lining root

channels and pores; few fine prominent yellowish brown (10YR 5/6) masses of

iron in the matrix; neutral; clear smooth boundary.

Bg—32 to 40 inches; dark gray (10YR 4/1) silty clay loam; weak medium prismatic

structure parting to moderate fine and medium angular blocky; firm; few fine roots

between peds; few faint very dark gray (10YR 3/1) organic coats on faces of peds;

few fine concretions of manganese lining root channels and pores; few fine

prominent strong brown (7.5YR 5/6) masses of iron in the matrix; slightly alkaline;

clear smooth boundary.

Btg1—40 to 49 inches; grayish brown (10YR 5/2) silty clay loam; moderate medium

prismatic structure parting to weak medium angular blocky; firm; common faint

dark gray (10YR 4/1) clay films on faces of peds; few fine concretions of

manganese lining root channels and pores; few fine prominent strong brown

(7.5YR 5/6) and common fine distinct yellowish brown (10YR 5/4) masses of iron

in the matrix; slightly alkaline; clear smooth boundary.

Btg2—49 to 58 inches; grayish brown (2.5Y 5/2) silty clay loam; moderate medium

prismatic structure; firm; few distinct gray (10YR 5/1) clay films on faces of peds;

few fine concretions of manganese lining pores; few fine prominent yellowish

brown (10YR 5/6) masses of iron in the matrix; slightly alkaline; gradual smooth

boundary.

Cg—58 to 65 inches; grayish brown (2.5Y 5/2) silty clay loam; massive; firm; very dark

gray (10YR 3/1) channel linings and fillings; many medium prominent yellowish

brown (10YR 5/6) masses of iron in the matrix; slightly alkaline.

Range in Characteristics

Thickness of the mollic epipedon: 24 to 36 inches

Thickness of the solum: 36 to 60 inches

Ap or A horizon:

Hue—10YR, 2.5Y, 5Y, or N

Value—2 or 3

Chroma—0 to 2

Texture—silty clay loam

Bg or Btg horizon:

Hue—10YR, 2.5Y, or 5Y

Value—3 to 6

Chroma—1 or 2

Texture—silty clay loam; stratified in some pedons

Cg horizon:

Hue—10YR, 2.5Y, 5Y, or N

Value—4 to 6

Chroma—0 to 2

Texture—silty clay loam or clay loam; stratified in some pedons

3107+—Sawmill silt loam, 0 to 2 percent slopes,

frequently flooded, overwash

Setting

Landform: Flood plains
Knox County, Illinois 107

Map Unit Composition

Sawmill and similar soils: 98 percent

Dissimilar soils: 2 percent

Minor Components

Similar soils:

• Soils that have more sand than the Sawmill soil or have browner colors in the surface

layer

Dissimilar soils:

• The somewhat poorly drained Littleton soils on low benches

Properties and Qualities of the Sawmill Soil

Parent material: Alluvium

Drainage class: Poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.4 inches

Content of organic matter in the surface layer: 4 to 5 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: At the surface,

January through May

Frequency and most likely period of flooding: Frequent, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and low for concrete

Surface runoff class: Negligible

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 3w

Prime farmland category: Prime farmland where drained and either protected from

flooding or not frequently flooded during the growing season

Hydric soil status: Hydric

Sylvan Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Typic Hapludalfs

Typical Pedon

Sylvan silt loam, 10 to 18 percent slopes, at an elevation of 670 feet; Bureau County,

Illinois; 2,500 feet east and 2,540 feet north of the southwest corner of sec. 34, T. 17

N., R. 8 E.; USGS Buda NE topographic quadrangle; lat. 41 degrees 25 minutes 55

seconds N. and long. 89 degrees 33 minutes 34 seconds W., NAD 27:

A—0 to 5 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR

5/2) dry; moderate medium and fine granular structure; friable; many very fine and

fine roots; neutral; clear smooth boundary.

E—5 to 10 inches; mixed dark grayish brown (10YR 4/2) and brown (10YR 4/3) silt

loam, pale brown (10YR 6/3) dry; weak medium platy structure parting to

moderate medium granular; friable; many very fine roots; few distinct very dark

grayish brown (10YR 3/2) organic coatings and light brownish gray (10YR 6/2) silt

coatings on faces of peds; slightly acid; clear smooth boundary.
108 Soil Survey of

Bt1—10 to 15 inches; brown (10YR 4/3) silty clay loam; moderate fine and very fine

subangular blocky structure; friable; common very fine roots; few distinct dark

brown (10YR 3/3) clay films and very few distinct light brownish gray (10YR 6/2)

silt coatings on faces of peds; few fine dark accumulations of iron and manganese;

neutral; clear smooth boundary.

Bt2—15 to 21 inches; dark yellowish brown (10YR 4/4) silty clay loam; moderate

medium and fine subangular blocky structure; friable; common very fine roots;

common distinct brown (7.5YR 4/4) clay films on faces of peds; few fine dark

accumulations of iron and manganese; slightly acid; clear smooth boundary.

Bt3—21 to 27 inches; yellowish brown (10YR 5/4) silty clay loam; weak medium

prismatic structure parting to moderate medium subangular blocky; friable;

common very fine roots; few distinct dark yellowish brown (10YR 4/4) clay films

and very few distinct light brownish gray (10YR 6/2) silt coatings on faces of peds;

slightly effervescent; few fine dark accumulations of iron and manganese; neutral;

clear smooth boundary.

Bt4—27 to 35 inches; yellowish brown (10YR 5/4) silt loam; common fine distinct

yellowish brown (10YR 5/6) and few fine distinct light brownish gray (10YR 6/2)

relict mottles; weak medium prismatic structure parting to moderate medium

subangular blocky; friable; common very fine roots; few prominent light gray (10YR

7/2) silt coatings and common faint brown (7.5YR 4/4) clay films on faces of peds;

few fine dark accumulations of iron and manganese; neutral; clear smooth

boundary.

BC—35 to 40 inches; yellowish brown (10YR 5/4) silt loam; common medium distinct

light brownish gray (10YR 6/2) mottles; weak coarse prismatic structure parting to

weak coarse subangular blocky; friable; few very fine roots; few faint dark yellowish

brown (10YR 4/4) clay films on faces of peds; few fine dark accumulations of iron

and manganese; few medium light-colored concretions of calcium carbonate;

slightly effervescent; slightly alkaline; gradual wavy boundary.

C1—40 to 54 inches; light yellowish brown (2.5Y 6/4) silt loam; common medium

distinct light brownish gray (10YR 6/2) and few fine distinct brownish yellow (10YR

6/6) mottles; appears massive but has planes of weakness; friable; few fine dark

accumulations of iron and manganese; common coarse light-colored concretions

of calcium carbonate; strongly effervescent; slightly alkaline; gradual wavy

boundary.

C2—54 to 60 inches; brownish yellow (10YR 6/6) silt loam; few medium prominent light

brownish gray (10YR 6/2) mottles; massive; friable; few fine dark accumulations of

iron and manganese; violently effervescent; moderately alkaline.

Range in Characteristics

Depth to carbonates: 22 to 40 inches

Thickness of the solum: 22 to 40 inches

Ap or A horizon:

Value—3 to 6

Chroma—2 to 4

Texture—silt loam

E horizon:

Hue—10YR

Value—4 or 5

Chroma—2 to 4

Bt horizon:

Hue—7.5YR or 10YR
Knox County, Illinois 109

Value—4 or 5

Chroma—3 to 6

Texture—silty clay loam or silt loam

C and/or Cg horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—2 to 6

Texture—silt loam or silt

19C3—Sylvan silty clay loam, 5 to 10 percent slopes,

severely eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes and shoulders

Map Unit Composition

Sylvan and similar soils: 92 percent

Dissimilar soils: 8 percent

Minor Components

Similar soils:

• Soils that have a thicker subsoil than that of the Sylvan soil and are not calcareous

within 40 inches of the surface

Dissimilar soils:

• The moderately well drained Elco soils on the lower backslopes

Properties and Qualities of the Sylvan Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric
110 Soil Survey of

19D3—Sylvan silty clay loam, 10 to 18 percent slopes,

severely eroded

Setting

Landform: Ground moraines

Position on the landform: Backslopes

Map Unit Composition

Sylvan and similar soils: 90 percent

Dissimilar soils: 10 percent

Minor Components

Similar soils:

• Soils that have a thicker subsoil than that of the Sylvan soil and are not calcareous

within 40 inches of the surface

Dissimilar soils:

• The moderately well drained Elco soils on the lower backslopes

Properties and Qualities of the Sylvan Soil

Parent material: Loess

Drainage class: Well drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 12.2 inches

Content of organic matter in the surface layer: 0.5 to 1.0 percent

Shrink-swell potential: Moderate

Flooding: None

Accelerated erosion: This soil has lost more than 75 percent of the original surface

layer. The plow layer consists largely of subsoil material.

Potential for frost action: High

Hazard of corrosion: Moderate for steel and concrete

Surface runoff class: Medium

Susceptibility to water erosion: High

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 4e

Prime farmland category: Not prime farmland

Hydric soil status: Not hydric

Virgil Series

Taxonomic classification: Fine-silty, mixed, superactive, mesic Udollic Endoaqualfs

Typical Pedon

Virgil silt loam, 0 to 2 percent slopes, at an elevation of 765 feet; Stephenson County,

Illinois; 300 feet south and 1,346 feet east of the northwest corner of sec. 8, T. 26 N.,

R. 8 E.; USGS Freeport East topographic quadrangle; lat. 42 degrees 16 minutes 30

seconds N. and long. 89 degrees 36 minutes 38 seconds W., NAD 27:
Knox County, Illinois 111

Ap—0 to 7 inches; black (10YR 2/1) silt loam, grayish brown (10YR 5/2) dry; weak

medium granular structure; friable; common fine roots; neutral; abrupt smooth

boundary.

Eg—7 to 13 inches; dark grayish brown (10YR 4/2) and grayish brown (10YR 5/2) silt

loam, light brownish gray (10YR 6/2) dry; weak thin platy structure parting to

moderate fine granular; friable; many fine roots; few faint black (10YR 2/1) organic

coatings on faces of peds and fillings in root channels; few fine prominent brown

(7.5YR 4/4) masses of iron accumulation in the matrix; strongly acid; clear smooth

boundary.

Bt1—13 to 17 inches; grayish brown (10YR 5/2) and brown (10YR 5/3) silty clay loam;

moderate fine subangular blocky structure; firm; common fine roots; few faint dark

grayish brown (10YR 4/2) clay films on faces of peds; common distinct light gray

(10YR 7/2) (dry) clay depletions on faces of peds; few fine black (10YR 2/1) iron

and manganese oxide concretions throughout; few fine prominent brown (7.5YR

4/4) and strong brown (7.5YR 5/6) masses of iron accumulation in the matrix;

strongly acid; clear smooth boundary.

Bt2—17 to 25 inches; grayish brown (10YR 5/2) and brown (10YR 5/3) silty clay loam;

moderate fine subangular blocky structure; firm; common fine roots; common faint

dark grayish brown (10YR 4/2) and grayish brown (10YR 5/2) clay films on faces

of peds; common faint light gray (10YR 7/2) (dry) clay depletions on faces of peds;

few fine black (10YR 2/1) iron and manganese oxide concretions throughout; few

fine prominent brown (7.5YR 4/4) and strong brown (7.5YR 5/6) masses of iron

accumulation in the matrix; strongly acid; gradual smooth boundary.

Btg1—25 to 35 inches; light brownish gray (2.5Y 6/2) silty clay loam; moderate fine

and medium subangular blocky structure; firm; few fine roots; many faint grayish

brown (2.5Y 5/2) clay films on faces of peds; few distinct light gray (10YR 7/2)

(dry) clay depletions on faces of peds; many fine black (10YR 2/1) iron and

manganese oxide concretions throughout; common fine prominent strong brown

(7.5YR 5/6 and 5/8) masses of iron accumulation in the matrix; strongly acid; clear

smooth boundary.

Btg2—35 to 44 inches; light brownish gray (2.5Y 6/2) silty clay loam; moderate

medium and coarse subangular and angular blocky structure; firm; few fine roots;

common faint grayish brown (2.5Y 5/2) clay films on faces of peds; few distinct

light gray (10YR 7/2) (dry) clay depletions on faces of peds; many fine black (10YR

2/1) iron and manganese oxide nodules and concretions throughout; many

medium prominent brown (7.5YR 4/4) and strong brown (7.5YR 5/6) masses of

iron accumulation in the matrix; moderately acid; clear smooth boundary.

Btg3—44 to 49 inches; grayish brown (2.5Y 5/2) silty clay loam; weak medium and

coarse angular blocky structure; firm; few fine roots; few prominent gray (N 5/0)

clay films on faces of peds; many fine black (10YR 2/1) iron and manganese oxide

nodules and concretions throughout; many medium prominent brown (7.5YR 4/4)

and strong brown (7.5YR 5/6) masses of iron accumulation in the matrix;

moderately acid; clear smooth boundary.

2Btg4—49 to 58 inches; grayish brown (2.5Y 5/2) and light brownish gray (2.5Y 6/2)

loam; weak coarse angular blocky structure; firm; few prominent dark gray (N 4/0)

clay films on faces of peds; few fine black (10YR 2/1) iron and manganese oxide

concretions throughout; many medium prominent brown (7.5YR 4/4) and strong

brown (7.5YR 5/6) masses of iron accumulation in the matrix; neutral; gradual

smooth boundary.

2C—58 to 60 inches; brown (10YR 4/3) and dark yellowish brown (10YR 4/4) sandy

loam; massive; friable; common fine distinct dark gray (10YR 4/1) and gray (10YR

5/1) iron depletions in the matrix; slightly alkaline.
112 Soil Survey of

Range in Characteristics

Thickness of the loess: 40 to 60 inches

Depth to carbonates: 45 to 70 inches

Thickness of the solum: 42 to 70 inches

Ap or A horizon:

Hue—10YR

Value—2 or 3

Chroma—1 or 2

Texture—silt loam

Eg horizon:

Hue—10YR

Value—4 to 6

Chroma—1 or 2

Texture—silt loam

Bt or Btg horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—2 to 4

Texture—silty clay loam

2Bt or 2Btg horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—2 to 6

Texture—loam, clay loam, sandy loam, or silt loam

Content of gravel—less than 10 percent

2C or 2Cg horizon:

Hue—10YR or 2.5Y

Value—4 to 6

Chroma—2 to 8

Texture—loam, sandy loam, silt loam, clay loam, or loamy sand

Content of gravel—less than 15 percent

7104A—Virgil silt loam, 0 to 2 percent slopes, rarely

flooded

Setting

Landform: Stream terraces and outwash plains

Position on the landform: Summits

Map Unit Composition

Virgil and similar soils: 95 percent

Dissimilar soils: 5 percent

Minor Components

Similar soils:

• Soils that have a thicker surface layer than that of the Virgil soil

• Soils that have less than 40 inches of loess over the stratified loamy materials

Dissimilar soils:

• The well drained Harvard soils in the higher positions
Knox County, Illinois 113

Properties and Qualities of the Virgil Soil

Parent material: Loess or other silty material

Drainage class: Somewhat poorly drained

Slowest permeability within a depth of 40 inches: Moderate

Permeability below a depth of 60 inches: Moderate or moderately rapid

Depth to restrictive feature: More than 80 inches

Available water capacity to a depth of 60 inches: About 11.6 inches

Content of organic matter in the surface layer: 2 to 4 percent

Shrink-swell potential: Moderate

Depth and months of the highest apparent seasonal high water table: 1 foot, January

through May

Frequency and most likely period of flooding: Rare, November through June

Potential for frost action: High

Hazard of corrosion: High for steel and moderate for concrete

Surface runoff class: Low

Susceptibility to water erosion: Low

Susceptibility to wind erosion: Low

Interpretive Groups

Land capability classification: 1

Prime farmland category: Prime farmland where drained

Hydric soil status: Not hydric

W—Water

• This map unit consists of natural bodies of water, such as ponds, lakes, and rivers.

115

This soil survey is an inventory and evaluation of the soils in the survey area. It can

be used to adjust land uses to the limitations and potentials of natural resources and

the environment. Also, it can help to prevent soil-related failures in land uses.

In preparing a soil survey, soil scientists, conservationists, engineers, and others

collect extensive field data about the nature and behavioral characteristics of the soils.

They collect data on erosion, droughtiness, flooding, and other factors that affect

various soil uses and management. Field experience and collected data on soil

properties and performance are used as a basis in predicting soil behavior.

Information in this section can be used to plan the use and management of soils for

crops and pasture; as forestland; as sites for buildings, sanitary facilities, highways and

other transportation systems, and parks and other recreational facilities; and as wildlife

habitat. It can be used to identify the potentials and limitations of each soil for specific

land uses and to help prevent construction failures caused by unfavorable soil

properties.

Planners and others using soil survey information can evaluate the effect of specific

land uses on productivity and on the environment. The survey can help planners to

maintain or create a land use pattern in harmony with the natural soil.

Contractors can use this survey to locate sources of sand, roadfill, and topsoil. They

can use it to identify areas where bedrock, wetness, or very firm soil layers can cause

difficulty in excavation.

Health officials, highway officials, engineers, and others may also find this survey

useful. The survey can help them plan the safe disposal of wastes and locate sites for

pavements, sidewalks, campgrounds, playgrounds, lawns, and trees and shrubs.

Interpretive Ratings

The interpretive tables in this survey rate the soils in the survey area for various

uses. Many of the tables identify the limitations that affect specified uses and indicate

the severity of those limitations. The ratings in these tables are both verbal and

numerical.

Rating Class Terms

Rating classes are expressed in the tables in terms that indicate the extent to which

the soils are limited by all of the soil features that affect a specified use or in terms that

indicate the suitability of the soils for the use. Thus, the tables may show limitation

classes or suitability classes. Terms for the limitation classes are not limited,

somewhat limited, and very limited. The suitability ratings are expressed as well suited,

moderately suited, poorly suited, and unsuited or as good, fair, and poor.

Numerical Ratings

Numerical ratings in the tables indicate the relative severity of individual limitations.

The ratings are shown as decimal fractions ranging from 0.00 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

Use and Management of the Soils
116 Soil Survey of

on the use and the point at which the soil feature is not a limitation. The limitations

appear in order from the most limiting to the least limiting. Thus, if more than one

limitation is identified, the most severe limitation is listed first and the least severe one

is listed last.

Crops and Pasture

General management needed for crops and pasture is suggested in this section. The

estimated yields of the main crops and pasture plants are listed, the system of land

capability classification used by the Natural Resources Conservation Service is

explained, and prime farmland is described.

Planners of management systems for individual fields or farms should consider the

detailed information given in the description of each soil under the heading “Soil Series

and Detailed Soil Map Units.” Specific information can be obtained from the local office

of the Natural Resources Conservation Service or the Cooperative Extension Service.

Crop Yield Estimates

Table 6 shows the average yields per acre that can be expected of the principal

crops under a high level of management. In any given year, yields may be higher or

lower than those indicated in the table because of variations in rainfall and other

climatic factors. The land capability classification of map units in the survey area also

is shown in the table.

The yields are based mainly on the experience and records of farmers,

conservationists, and extension agents. Available yield data from nearby counties and

results of field trials and demonstrations also are considered.

The management needed to obtain the indicated yields of the various crops

depends on the kind of soil and the crop. Management can include drainage; erosion

control; protection from flooding; the proper planting and seeding rates; suitable highyielding crop varieties; appropriate and timely tillage; control of weeds, plant diseases,

and harmful insects; favorable soil reaction and optimum levels of nitrogen,

phosphorus, potassium, and trace elements for each crop; effective use of crop

residue, barnyard manure, and green manure crops; and harvesting that ensures the

smallest possible loss.

The estimated yields reflect the productive capacity of each soil for each of the

principal crops. Yields are likely to increase as new production technology is

developed. The relative productivity of a given soil compared with that of other soils,

however, is not likely to change.

Crops other than those shown in the table are grown in the survey area, but

estimated yields are not listed because the acreage of such crops is small. The local

office of the Natural Resources Conservation Service or the Cooperative Extension

Service can provide information about the management and productivity of the soils

for those crops.

Pasture yields.—Under good management, proper grazing is essential for the

production of high-quality forage, stand survival, and erosion control. Proper grazing

helps plants to maintain sufficient and generally vigorous top growth during the

growing season. Brush control is essential in many areas, and weed control generally

is needed. Rotation grazing and renovation also are important management practices.

Yield estimates are often provided in animal unit months (AUM), or the amount of

forage or feed required to feed one animal unit (one cow, one horse, one mule, five

sheep, or five goats) for 30 days.

The local office of the Natural Resources Conservation Service or the Cooperative

Extension Service can provide information about forage yields other than those shown

in table 6.
Knox County, Illinois 117

Land Capability Classification

Land capability classification shows, in a general way, the suitability of soils for

most kinds of field crops. Crops that require special management are excluded. The

soils are grouped according to their limitations for field crops, the risk of damage if they

are used for crops, and the way they respond to management. The criteria used in

grouping the soils do not take into account major and generally expensive landshaping

that would change slope, depth, or other characteristics of the soils, nor do they

include possible but unlikely major reclamation projects. Capability classification is not

a substitute for interpretations designed to show suitability and limitations of groups of

soils for forestland or for engineering purposes.

In the capability system, soils generally are grouped at three levels—capability

class, subclass, and unit (USDA, 1961). These categories indicate the degree and

kinds of limitations affecting mechanized farming systems that produce the more

commonly grown field crops, such as corn, soybeans, small grain, and hay. Only class

and subclass are used in this survey.

Capability classes, the broadest groups, are designated by the numbers 1 through

8. The numbers indicate progressively greater limitations and narrower choices for

practical use.

If properly managed, soils in classes 1, 2, 3, and 4 are suitable for the mechanized

production of commonly grown field crops and for pasture and forestland. The degree

of the soil limitations affecting the production of cultivated crops increases

progressively from class 1 to class 4. The limitations can affect levels of production

and the risk of permanent soil deterioration caused by erosion and other factors.

Soils in classes 5, 6, and 7 are generally not suited to the mechanized production of

commonly grown field crops without special management, but they are suitable for

plants that provide a permanent cover, such as grasses and trees. The severity of the

soil limitations affecting crops increases progressively from class 5 to class 7. The

local office of the Cooperative Extension Service or the Natural Resources

Conservation Service can provide guidance on the use of these soils as cropland.

Areas in class 8 are generally not suited to crops, pasture, or forestland without a

level of management that is impractical. These areas may have potential for other

uses, such as recreational facilities and wildlife habitat.

Capability subclasses identify the dominant kind of limitation in the class. They are

designated by adding a small letter, e, w, s, or c, to the class numeral, for example, 2e.

The letter e shows that the main hazard is the risk of erosion unless a close-growing

plant cover is maintained; w shows that water in or on the soil interferes with plant

growth or cultivation (in some soils the wetness can be partly corrected by artificial

drainage); s shows that the soil is limited mainly because it is shallow, droughty, or

stony; and c, used in only some parts of the United States, shows that the chief

limitation is climate that is very cold or very dry.

There are no subclasses in class 1 because the soils of this class have few

limitations. Class 5 contains only the subclasses indicated by w, s, or c because the

soils in class 5 are subject to little or no erosion. They have other limitations that

restrict their use to pasture, forestland, wildlife habitat, or recreation.

The capability classification of the soils in the survey area is given in table 6.

Prime Farmland

Prime farmland is one of several kinds of important farmland defined by the U.S.

Department of Agriculture. It is of major importance in meeting the Nation’s short- and

long-range needs for food and fiber. Because the supply of high-quality farmland is

limited, the U.S. Department of Agriculture recognizes that responsible levels of
118 Soil Survey of

government, as well as individuals, should encourage and facilitate the wise use of our

Nation’s prime farmland.

Prime farmland, as defined by the U.S. Department of Agriculture, is land that has

the best combination of physical and chemical characteristics for producing food, feed,

forage, fiber, and oilseed crops and is available for these uses. It could be cultivated

land, pastureland, forestland, or other land, but it is not urban or built-up land or water

areas. The soil qualities, growing season, and moisture supply are those needed for

the soil to economically produce sustained high yields of crops when proper

management, including water management, and acceptable farming methods are

applied. In general, prime farmland has an adequate and dependable supply of

moisture from precipitation or irrigation, a favorable temperature and growing season,

acceptable acidity or alkalinity, an acceptable salt and sodium content, and few or no

rocks. It is permeable to water and air. It is not excessively erodible or saturated with

water for long periods, and it either is not frequently flooded during the growing season

or is protected from flooding. Slope ranges mainly from 0 to 6 percent. More detailed

information about the criteria for prime farmland is available at the local office of the

Natural Resources Conservation Service.

Over the past several decades, a major trend in land use in some parts of the

survey area has been the loss of some prime farmland to industrial and urban uses.

The loss of prime farmland to other uses puts pressure on marginal lands, which

generally are more erodible, droughty, and less productive and cannot be easily

cultivated.

About 287,233 acres in the survey area, or about 62 percent of the total acreage,

meets the requirements for prime farmland.

The map units in the survey area that are considered prime farmland are listed in

table 7. This list does not constitute a recommendation for a particular land use. On

some soils included in the list, measures that overcome a hazard or limitation, such as

flooding, wetness, and droughtiness, are needed. Onsite evaluation is needed to

determine whether or not the hazard or limitation has been overcome by corrective

measures. The extent of each listed map unit is shown in table 5. The location is

shown on the detailed soil maps. The soil qualities that affect use and management

are described under the heading “Soil Series and Detailed Soil Map Units.”

Hydric Soils

In this section, hydric soils are defined and described and the hydric soils in the

survey area are listed.

The three essential characteristics of wetlands are hydrophytic vegetation, hydric

soils, and wetland hydrology (Cowardin and others, 1979; U.S. Army Corps of

Engineers, 1987; National Research Council, 1995; Tiner, 1985). Criteria for each of

the characteristics must be met for areas to be identified as wetlands. Undrained

hydric soils that have natural vegetation should support a dominant population of

ecological wetland plant species. Hydric soils that have been converted to other uses

should be capable of being restored to wetlands.

Hydric soils are defined by the National Technical Committee for Hydric Soils

(NTCHS) as soils that formed under conditions of saturation, flooding, or ponding long

enough during the growing season to develop anaerobic conditions in the upper part

(Federal Register, 1994). These soils are either saturated or inundated long enough

during the growing season to support the growth and reproduction of hydrophytic

vegetation.

The NTCHS definition identifies general soil properties that are associated with

wetness. In order to determine whether a specific soil is a hydric soil or nonhydric soil,

however, more specific information, such as information about the depth and duration

of the water table, is needed. Thus, criteria that identify those estimated soil properties
Knox County, Illinois 119

unique to hydric soils have been established (Federal Register, 1995). These criteria are

used to identify a phase of a soil series that normally is associated with wetlands. The

criteria used are selected estimated soil properties that are described in “Soil

Taxonomy” (Soil Survey Staff, 1999) and “Keys to Soil Taxonomy” (Soil Survey Staff,

2003) and in the “Soil Survey Manual” (Soil Survey Division Staff, 1993).

If soils are wet enough for a long enough period to be considered hydric, they should

exhibit certain properties that can be easily observed in the field. These visible

properties are indicators of hydric soils. The indicators used to make onsite

determinations of hydric soils in this survey area are specified in “Field Indicators of

Hydric Soils in the United States” (Hurt and others, 2002).

Hydric soils are identified by examining and describing the soil to a depth of about

20 inches. This depth may be greater if determination of an appropriate indicator so

requires. It is always recommended that soils be excavated and described to the depth

necessary for an understanding of the redoximorphic processes. Then, using the

completed soil descriptions, soil scientists can compare the soil features required by

each indicator and specify which indicators have been matched with the conditions

observed in the soil. The soil can be identified as a hydric soil if at least one of the

approved indicators is present.

Map units that are made up of hydric soils may have small areas, or inclusions, of

nonhydric soils in the higher positions on the landform, and map units made up of

nonhydric soils may have inclusions of hydric soils in the lower positions on the

landform.

The map units in which one or more components meet the definition of hydric soils

and, in addition, have at least one of the hydric soil indicators are listed in table 8. This

list can help in planning land uses; however, onsite investigation is recommended to

determine the hydric soils on a specific site (National Research Council, 1995; Hurt

and others, 2002).

Forestland Productivity and Management

Much of the forestland in Knox County has been cleared since the early days of

settlement and is now used for row crops. Much of the remaining forestland is in areas

that are too steep, too wet, or too remote and isolated for growing row crops. Each

year, some land is cleared, generally in parcels ranging from a quarter of an acre to

several acres.

Forestland harvesting on private land is generally in areas of steep or very steep

soils, such as Elco, Hickory, and Marseilles soils, or in areas of wet soils on flood

plains, such as Lawson and Sawmill soils, which have not been disturbed for a number

of years. Selectively cutting white oak, hickory, ash, and walnut for sawlogs is the

most common harvesting method. Some softwood trees are harvested for pulpwood.

The most common trees in the uplands are white oak, northern red oak, hickory,

white ash, green ash, sugar maple, silver maple, boxelder, walnut, and American elm.

The most common trees on the bottom land are cottonwood, sycamore, willow, white

oak, and hickory.

Many of the existing stands can be improved by thinning out mature trees and trees

of low value. Measures that protect the woodland from fire and grazing are needed.

Logging trails and access roads are commonly in areas of steep soils. Shaping and

seeding these trails and roads and applying fertilizer immediately after harvest help to

control erosion. Properly shaped and constructed water bars across the trails also

help to control erosion. Interplanting is needed for maximum woodland production.

Control or removal of competing vegetation, such as the trees of low value, is needed if

seedlings are planted. A grass cover is needed between rows of seedlings planted on

bare, sloping land.
120 Soil Survey of

The tables described in this section can help forest owners or managers plan the

use of soils for wood crops. They show the potential productivity of the soils for wood

crops and rate the soils according to the limitations that affect various aspects of

forestland management.

Forestland Productivity

Table 9 can help woodland owners or forest managers plan the use of soils for wood

crops. Only those soils commonly used for wood crops are listed.

The potential productivity of merchantable or common trees on a soil is expressed

as a site index and as a volume number. The site index is the average height, in feet,

that dominant and codominant trees of a given species attain in a specified number of

years. The site index applies to fully stocked, even-aged, unmanaged stands.

Commonly grown trees are those that woodland managers generally favor in

intermediate or improvement cuttings. They are selected on the basis of growth rate,

quality, value, and marketability.

The volume, a number, is the yield likely to be produced by the most important

trees. This number, expressed as cubic feet per acre per year, indicates the amount of

fiber produced in a fully stocked, even-aged, unmanaged stand.

Suggested trees to plant are those that are suitable for commercial wood

production.

Forestland Management

In tables 10a through 10e, interpretive ratings are given for various aspects of

forestland management. The ratings are both verbal and numerical.

Some rating class terms indicate the degree to which the soils are suited to a

specified aspect of forestland management. Well suited indicates that the soil has

features that are favorable for the specified management aspect and has no

limitations. Good performance can be expected, and little or no maintenance is

needed. Moderately suited indicates that the soil has features that are moderately

favorable for the specified management aspect. One or more soil properties are less

than desirable, and fair performance can be expected. Some maintenance is needed.

Poorly suited indicates that the soil has one or more properties that are unfavorable for

the specified management aspect. Overcoming the unfavorable properties requires

special design, extra maintenance, and costly alteration. Unsuited indicates that the

expected performance of the soil is unacceptable for the specified management

aspect or that extreme measures are needed to overcome the undesirable soil

properties.

Numerical ratings in the tables indicate the severity of individual limitations. The

ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

on the specified aspect of forestland management (1.00) and the point at which the

soil feature is not a limitation (0.00).

Rating class terms for seedling mortality are expressed as low, moderate, and high.

Where these terms are used, the numerical ratings indicate gradations between the

point at which the potential for fire damage or seedling mortality is highest (1.00) and

the point at which the potential is lowest (0.00).

The paragraphs that follow indicate the soil properties considered in rating the soils.

More detailed information about the criteria used in the ratings is available in the

“National Forestry Manual,” which is available in local offices of the Natural Resources

Conservation Service or on the Internet.
Knox County, Illinois 121

Table 10a

For limitations affecting construction of haul roads and log landings, the ratings are

based on slope, flooding, permafrost, plasticity index, the hazard of soil slippage,

content of sand, the Unified classification, rock fragments on or below the surface,

depth to a restrictive layer that is indurated, depth to a water table, and ponding. The

limitations are described as slight, moderate, or severe. A rating of slight indicates that

no significant limitations affect construction activities, moderate indicates that one or

more limitations can cause some difficulty in construction, and severe indicates that

one or more limitations can make construction very difficult or very costly.

The ratings of suitability for log landings are based on slope, rock fragments on the

surface, plasticity index, content of sand, the Unified classification, depth to a water

table, ponding, flooding, and the hazard of soil slippage. The soils are described as

well suited, moderately suited, or poorly suited to use as log landings.

Ratings in the column soil rutting hazard are based on depth to a water table, rock

fragments on or below the surface, the Unified classification, depth to a restrictive

layer, and slope. Ruts form as a result of the operation of forest equipment. The hazard

is described as slight, moderate, or severe. A rating of slight indicates that the soil is

subject to little or no rutting, moderate indicates that rutting is likely, and severe

indicates that ruts form readily.

Table 10b

Ratings in the column hazard of off-road or off-trail erosion are based on slope and

on soil erodibility factor K. The soil loss is caused by sheet or rill erosion in off-road or

off-trail areas where 50 to 75 percent of the surface has been exposed by logging,

grazing, mining, or other kinds of disturbance. The hazard is described as slight,

moderate, severe, or very severe. A rating of slight indicates that erosion is unlikely

under ordinary climatic conditions; moderate indicates that some erosion is likely and

that erosion-control measures may be needed; severe indicates that erosion is very

likely and that erosion-control measures, including revegetation of bare areas, are

advised; and very severe indicates that significant erosion is expected, loss of soil

productivity and off-site damage are likely, and erosion-control measures are costly

and generally impractical.

Ratings in the column hazard of erosion on roads and trails are based on the soil

erodibility factor K, slope, and content of rock fragments. The ratings apply to

unsurfaced roads and trails. The hazard is described as slight, moderate, or severe. A

rating of slight indicates that little or no erosion is likely; moderate indicates that some

erosion is likely, that the roads or trails may require occasional maintenance, and that

simple erosion-control measures are needed; and severe indicates that significant

erosion is expected, that the roads or trails require frequent maintenance, and that

costly erosion-control measures are needed.

Ratings in the column suitability for roads (natural surface) are based on slope, rock

fragments on the surface, plasticity index, content of sand, the Unified classification,

depth to a water table, ponding, flooding, and the hazard of soil slippage. The ratings

indicate the suitability for using the natural surface of the soil for roads. The soils are

described as well suited, moderately suited, or poorly suited to this use.

Table 10c

Ratings in the columns suitability for hand planting and suitability for mechanical

planting are based on slope, depth to a restrictive layer, content of sand, plasticity

index, rock fragments on or below the surface, depth to a water table, and ponding.

The soils are described as well suited, moderately suited, poorly suited, or unsuited to

these methods of planting. It is assumed that necessary site preparation is completed

before seedlings are planted.
122 Soil Survey of

Ratings in the column suitability for use of harvesting equipment are based on slope,

rock fragments on the surface, plasticity index, content of sand, the Unified

classification, depth to a water table, and ponding. The soils are described as well

suited, moderately suited, or poorly suited to this use.

Table 10d

Ratings in the column suitability for mechanical site preparation (surface) are based

on slope, depth to a restrictive layer, plasticity index, rock fragments on or below the

surface, depth to a water table, and ponding. The soils are described as well suited,

poorly suited, or unsuited to this management activity. The part of the soil from the

surface to a depth of about 1 foot is considered in the ratings.

Ratings in the column suitability for mechanical site preparation (deep) are based

on slope, depth to a restrictive layer, rock fragments on or below the surface, depth to

a water table, and ponding. The soils are described as well suited, poorly suited, or

unsuited to this management activity. The part of the soil from the surface to a depth of

about 3 feet is considered in the ratings.

Table 10e

Ratings in the column potential for seedling mortality are based on flooding,

ponding, depth to a water table, content of lime, reaction, salinity, available water

capacity, soil moisture regime, soil temperature regime, aspect, and slope. The soils

are described as having a low, moderate, or high potential for seedling mortality.

Windbreaks and Environmental Plantings

Windbreaks protect livestock, buildings, yards, fruit trees, gardens, and cropland

from wind and snow; help to keep snow on fields; and provide food and cover for

wildlife. Field windbreaks are narrow plantings made at right angles to the prevailing

wind and at specific intervals across the field. The interval depends on the erodibility of

the soil.

Environmental plantings help to beautify and screen houses and other buildings and

to abate noise. The plants, mostly evergreen shrubs and trees, are closely spaced. To

ensure plant survival, a healthy planting stock of suitable species should be planted

properly on a well prepared site and maintained in good condition.

Table 11 shows the height that locally grown trees and shrubs are expected to

reach in 20 years on various soils. The estimates in table 11 are based on

measurements and observation of established plantings that have been given

adequate care. They can be used as a guide in planning windbreaks and screens.

Additional information on planning windbreaks and screens and planting and caring for

trees and shrubs can be obtained from the local office of the Natural Resources

Conservation Service or of the Cooperative Extension Service or from a commercial

nursery.

Recreation

Knox County has some areas of scenic and historic interest. These areas are used

mainly for camping, hiking, fishing, sightseeing, picnicking, or boating. Public areas

available for recreation include Lake Storey (fig. 5), the Wolf Covered Bridge Historical

Site, and the Carl Sandburg Birthplace Historical Site. There are numerous private

recreational areas, including several large lakes and sportsmen’s clubs. Hiking, fishing,

boating, and hunting are the major uses in these areas. Many of the sportsmen’s clubs

are in areas of mine spoil, where numerous lakes have been created.

The soils of the survey area are rated in tables 12a and 12b according to limitations

that affect their suitability for recreation. The ratings are both verbal and numerical.
Knox County, Illinois 123

Rating class terms indicate the extent to which the soils are limited by all of the soil

features that affect the recreational uses. Not limited indicates that the soil has

features that are very favorable for the specified use. Good performance and very low

maintenance can be expected. Somewhat limited indicates that the soil has features

that are moderately favorable for the specified use. The limitations can be overcome or

minimized by special planning, design, or installation. Fair performance and moderate

maintenance can be expected. Very limited indicates that the soil has one or more

features that are unfavorable for the specified use. The limitations generally cannot be

overcome without major soil reclamation, special design, or expensive installation

procedures. Poor performance and high maintenance can be expected.

Numerical ratings in the tables indicate the severity of individual limitations. The

ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

on the use (1.00) and the point at which the soil feature is not a limitation (0.00).

The ratings in the tables are based on restrictive soil features, such as wetness,

slope, and texture of the surface layer. Susceptibility to flooding is considered. Not

considered in the ratings, but important in evaluating a site, are the location and

accessibility of the area, the size and shape of the area and its scenic quality,

Figure 5.—A recreational area adjacent to Lake Storey.
124 Soil Survey of

vegetation, access to water, potential water impoundment sites, and access to public

sewer lines. The capacity of the soil to absorb septic tank effluent and the ability of the

soil to support vegetation also are important. Soils that are subject to flooding are

limited for recreational uses by the duration and intensity of flooding and the season

when flooding occurs. In planning recreational facilities, onsite assessment of the

height, duration, intensity, and frequency of flooding is essential.

The information in tables 12a and 12b can be supplemented by other information in

this survey, for example, interpretations for building site development, construction

materials, sanitary facilities, and water management.

Camp areas require site preparation, such as shaping and leveling the tent and

parking areas, stabilizing roads and intensively used areas, and installing sanitary

facilities and utility lines. Camp areas are subject to heavy foot traffic and some

vehicular traffic. The ratings are based on the soil properties that affect the ease of

developing camp areas and the performance of the areas after development. Slope,

stoniness, and depth to bedrock or a cemented pan are the main concerns affecting

the development of camp areas. The soil properties that affect the performance of the

areas after development are those that influence trafficability and promote the growth

of vegetation, especially in heavily used areas. For good trafficability, the surface of

camp areas should absorb rainfall readily, remain firm under heavy foot traffic, and not

be dusty when dry. The soil properties that influence trafficability are texture of the

surface layer, depth to a water table, ponding, flooding, permeability, and large stones.

The soil properties that affect the growth of plants are depth to bedrock or a cemented

pan, permeability, and toxic substances in the soil.

Picnic areas are subject to heavy foot traffic. Most vehicular traffic is confined to

access roads and parking areas. The ratings are based on the soil properties that

affect the ease of developing picnic areas and that influence trafficability and the

growth of vegetation after development. Slope and stoniness are the main concerns

affecting the development of picnic areas. For good trafficability, the surface of picnic

areas should absorb rainfall readily, remain firm under heavy foot traffic, and not be

dusty when dry. The soil properties that influence trafficability are texture of the surface

layer, depth to a water table, ponding, flooding, permeability, and large stones. The soil

properties that affect the growth of plants are depth to bedrock or a cemented pan,

permeability, and toxic substances in the soil.

Playgrounds require soils that are nearly level, are free of stones, and can

withstand intensive foot traffic. The ratings are based on the soil properties that affect

the ease of developing playgrounds and that influence trafficability and the growth of

vegetation after development. Slope and stoniness are the main concerns affecting the

development of playgrounds. For good trafficability, the surface of the playgrounds

should absorb rainfall readily, remain firm under heavy foot traffic, and not be dusty

when dry. The soil properties that influence trafficability are texture of the surface layer,

depth to a water table, ponding, flooding, permeability, and large stones. The soil

properties that affect the growth of plants are depth to bedrock or a cemented pan,

permeability, and toxic substances in the soil.

Paths and trails for hiking and horseback riding should require little or no slope

modification through cutting and filling. The ratings are based on the soil properties

that affect trafficability and erodibility. These properties are stoniness, depth to a water

table, ponding, flooding, slope, and texture of the surface layer.

Off-road motorcycle trails require little or no site preparation. They are not covered

with surfacing material or vegetation. Considerable compaction of the soil material is

likely. The ratings are based on the soil properties that influence erodibility, trafficability,

dustiness, and the ease of revegetation. These properties are stoniness, slope, depth

to a water table, ponding, flooding, and texture of the surface layer.

Golf fairways are subject to heavy foot traffic and some light vehicular traffic.

Cutting or filling may be required. Irrigation is not considered in the ratings. The ratings
Knox County, Illinois 125

are based on the soil properties that affect plant growth and trafficability after

vegetation is established. The properties that affect plant growth are reaction; depth to

a water table; ponding; depth to bedrock or a cemented pan; the available water

capacity in the upper 40 inches; the content of salts, sodium, or calcium carbonate;

and sulfidic materials. The properties that affect trafficability are flooding, depth to a

water table, ponding, slope, stoniness, and the amount of sand, clay, or organic matter

in the surface layer. The suitability of the soil for traps, tees, roughs, and greens is not

considered in the ratings.

Wildlife Habitat

Soils affect the kind and amount of vegetation that is available to wildlife as food

and cover. They also affect the construction of water impoundments. The kind and

abundance of wildlife depend largely on the amount and distribution of food, cover, and

water. Wildlife habitat can be created or improved by planting appropriate vegetation,

by maintaining the existing plant cover, or by promoting the natural establishment of

desirable plants.

In table 13, the soils in the survey area are rated according to their potential for

providing habitat for various kinds of wildlife. This information can be used in planning

parks, wildlife refuges, nature study areas, and other developments for wildlife; in

selecting soils that are suitable for establishing, improving, or maintaining specific

elements of wildlife habitat; and in determining the intensity of management needed for

each element of the habitat.

The potential of the soil is rated good, fair, poor, or very poor. A rating of good

indicates that the element or kind of habitat is easily established, improved, or

maintained. Few or no limitations affect management, and satisfactory results can be

expected. A rating of fair indicates that the element or kind of habitat can be

established, improved, or maintained in most places. Moderately intensive

management is required for satisfactory results. A rating of poor indicates that

limitations are severe for the designated element or kind of habitat. Habitat can be

created, improved, or maintained in most places, but management is difficult and must

be intensive. A rating of very poor indicates that restrictions for the element or kind of

habitat are very severe and that unsatisfactory results can be expected. Creating,

improving, or maintaining habitat is impractical or impossible.

The elements of wildlife habitat are described in the following paragraphs.

Grain and seed crops are domestic grains and seed-producing herbaceous plants.

Soil properties and features that affect the growth of grain and seed crops are depth of

the root zone, texture of the surface layer, available water capacity, wetness, slope,

surface stoniness, and flooding. Soil temperature and soil moisture also are

considerations. Examples of grain and seed crops are corn, wheat, oats, and barley.

Grasses and legumes are domestic perennial grasses and herbaceous legumes.

Soil properties and features that affect the growth of grasses and legumes are depth

of the root zone, texture of the surface layer, available water capacity, wetness, surface

stoniness, flooding, and slope. Soil temperature and soil moisture also are

considerations. Examples of grasses and legumes are fescue, lovegrass, bromegrass,

clover, and alfalfa.

Wild herbaceous plants are native or naturally established grasses and forbs,

including weeds. Soil properties and features that affect the growth of these plants are

depth of the root zone, texture of the surface layer, available water capacity, wetness,

surface stoniness, and flooding. Soil temperature and soil moisture also are

considerations. Examples of wild herbaceous plants are bluestem, goldenrod,

beggarweed, wheatgrass, and grama.

Hardwood trees and woody understory produce nuts or other fruit, buds, catkins,

twigs, bark, and foliage. Soil properties and features that affect the growth of hardwood
126 Soil Survey of

trees and shrubs are depth of the root zone, available water capacity, and wetness.

Examples of these plants are oak, poplar, cherry, sweetgum, apple, hawthorn,

dogwood, hickory, blackberry, and blueberry. Examples of fruit-producing shrubs that

are suitable for planting on soils rated good are Russian-olive, autumn-olive, and

crabapple.

Coniferous plants furnish browse and seeds. Soil properties and features that affect

the growth of coniferous trees, shrubs, and ground cover are depth of the root zone,

available water capacity, and wetness. Examples of coniferous plants are pine, spruce,

fir, cedar, and juniper.

Wetland plants are annual and perennial wild herbaceous plants that grow on moist

or wet sites. Submerged or floating aquatic plants are excluded. Soil properties and

features affecting wetland plants are texture of the surface layer, wetness, reaction,

salinity, slope, and surface stoniness. Examples of wetland plants are smartweed, wild

millet, wildrice, saltgrass, cordgrass, rushes, sedges, and reeds.

Shallow water areas have an average depth of less than 5 feet. Some are naturally

wet areas. Others are created by dams, levees, or other water-control structures. Soil

properties and features affecting shallow water areas are depth to bedrock, wetness,

surface stoniness, slope, and permeability. Examples of shallow water areas are

marshes, waterfowl feeding areas, and ponds.

The habitat for various kinds of wildlife is described in the following paragraphs.

Habitat for openland wildlife consists of cropland, pasture, meadows, and areas that

are overgrown with grasses, herbs, shrubs, and vines. These areas produce grain and

seed crops, grasses and legumes, and wild herbaceous plants. Wildlife attracted to

these areas include bobwhite quail, pheasant, meadowlark, field sparrow, cottontail,

and red fox.

Habitat for woodland wildlife consists of areas of deciduous and/or coniferous plants

and associated grasses, legumes, and wild herbaceous plants. Wildlife attracted to

these areas include wild turkey, ruffed grouse, woodcock, thrushes, woodpeckers,

squirrels, gray fox, raccoon, deer, and bear.

Habitat for wetland wildlife consists of open, marshy or swampy shallow water areas

(fig. 6). Some of the wildlife attracted to such areas are ducks, geese, herons, shore

birds, muskrat, mink, and beaver.

Engineering

This section provides information for planning land uses related to urban

development and to water management. Soils are rated for various uses, and the most

limiting features are identified. Ratings are given for building site development, sanitary

facilities, construction materials, and water management. The ratings are based on

observed performance of the soils and on the data in the tables described under the

heading “Soil Properties.”

Information in this section is intended for land use planning, for evaluating land use

alternatives, and for planning site investigations prior to design and construction. The

information, however, has limitations. For example, estimates and other data generally

apply only to that part of the soil between the surface and a depth of 5 to 7 feet.

Because of the map scale, small areas of different soils may be included within the

mapped areas of a specific soil.

The information is not site specific and does not eliminate the need for onsite

investigation of the soils or for testing and analysis by personnel experienced in the

design and construction of engineering works.

Government ordinances and regulations that restrict certain land uses or impose

specific design criteria were not considered in preparing the information in this section.

Local ordinances and regulations should be considered in planning, in site selection,

and in design.
Knox County, Illinois 127

Soil properties, site features, and observed performance were considered in

determining the ratings in this section. During the fieldwork for this soil survey,

determinations were made about particle-size distribution, liquid limit, plasticity index,

soil reaction, depth to bedrock, hardness of bedrock within 5 to 7 feet of the surface,

soil wetness, depth to a water table, ponding, slope, likelihood of flooding, natural soil

structure aggregation, and soil density. Data were collected about kinds of clay

minerals, mineralogy of the sand and silt fractions, and the kinds of adsorbed cations.

Estimates were made for erodibility, permeability, corrosivity, shrink-swell potential,

available water capacity, and other behavioral characteristics affecting engineering

uses.

This information can be used to evaluate the potential of areas for residential,

commercial, industrial, and recreational uses; make preliminary estimates of

construction conditions; evaluate alternative routes for roads, streets, highways,

pipelines, and underground cables; evaluate alternative sites for sanitary landfills,

septic tank absorption fields, and sewage lagoons; plan detailed onsite investigations

of soils and geology; locate potential sources of sand, earthfill, and topsoil; plan

drainage systems, irrigation systems, ponds, terraces, and other structures for soil and

water conservation; and predict performance of proposed small structures and

Figure 6.—Wetland wildlife habitat in a water-filled area of map unit 863 (Pits, clay).
128 Soil Survey of

pavements by comparing the performance of existing similar structures on the same or

similar soils.

The information in the tables, along with the soil maps, the soil descriptions, and

other data provided in this survey, can be used to make additional interpretations.

Some of the terms used in this soil survey have a special meaning in soil science

and are defined in the Glossary.

Building Site Development

Soil properties influence the development of building sites, including the selection of

the site, the design of the structure, construction, performance after construction, and

maintenance. Tables 14a and 14b show the degree and kind of soil limitations that

affect dwellings with and without basements, small commercial buildings, local roads

and streets, shallow excavations, and lawns and landscaping.

The ratings in the tables are both verbal and numerical. Rating class terms indicate

the extent to which the soils are limited by all of the soil features that affect building

site development. Not limited indicates that the soil has features that are very favorable

for the specified use. Good performance and very low maintenance can be expected.

Somewhat limited indicates that the soil has features that are moderately favorable for

the specified use. The limitations can be overcome or minimized by special planning,

design, or installation. Fair performance and moderate maintenance can be expected.

Very limited indicates that the soil has one or more features that are unfavorable for

the specified use. The limitations generally cannot be overcome without major soil

reclamation, special design, or expensive installation procedures. Poor performance

and high maintenance can be expected.

Numerical ratings in the tables indicate the severity of individual limitations. The

ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

on the use (1.00) and the point at which the soil feature is not a limitation (0.00).

Dwellings are single-family houses of three stories or less. For dwellings without

basements, the foundation is assumed to consist of spread footings of reinforced

concrete built on undisturbed soil at a depth of 2 feet or at the depth of maximum frost

penetration, whichever is deeper. For dwellings with basements, the foundation is

assumed to consist of spread footings of reinforced concrete built on undisturbed soil

at a depth of about 7 feet. The ratings for dwellings are based on the soil properties

that affect the capacity of the soil to support a load without movement and on the

properties that affect excavation and construction costs. The properties that affect the

load-supporting capacity include depth to a water table, ponding, flooding, subsidence,

linear extensibility (shrink-swell potential), and compressibility. Compressibility is

inferred from the Unified classification. The properties that affect the ease and amount

of excavation include depth to a water table, ponding, flooding, slope, depth to bedrock

or a cemented pan, hardness of bedrock or a cemented pan, and the amount and size

of rock fragments.

Small commercial buildings are structures that are less than three stories high and

do not have basements. The foundation is assumed to consist of spread footings of

reinforced concrete built on undisturbed soil at a depth of 2 feet or at the depth of

maximum frost penetration, whichever is deeper. The ratings are based on the soil

properties that affect the capacity of the soil to support a load without movement and

on the properties that affect excavation and construction costs. The properties that

affect the load-supporting capacity include depth to a water table, ponding, flooding,

subsidence, linear extensibility (shrink-swell potential), and compressibility (which is

inferred from the Unified classification). The properties that affect the ease and amount

of excavation include flooding, depth to a water table, ponding, slope, depth to bedrock
Knox County, Illinois 129

or a cemented pan, hardness of bedrock or a cemented pan, and the amount and size

of rock fragments.

Local roads and streets have an all-weather surface and carry automobile and light

truck traffic all year. They have a subgrade of cut or fill soil material; a base of gravel,

crushed rock, or soil material stabilized by lime or cement; and a surface of flexible

material (asphalt), rigid material (concrete), or gravel with a binder. The ratings are

based on the soil properties that affect the ease of excavation and grading and the

traffic-supporting capacity. The properties that affect the ease of excavation and

grading are depth to bedrock or a cemented pan, hardness of bedrock or a cemented

pan, depth to a water table, ponding, flooding, the amount of large stones, and slope.

The properties that affect the traffic-supporting capacity are soil strength (as inferred

from the AASHTO group index number), subsidence, linear extensibility (shrink-swell

potential), the potential for frost action, depth to a water table, and ponding.

Shallow excavations are trenches or holes dug to a maximum depth of 5 or 6 feet

for graves, utility lines, open ditches, or other purposes. The ratings are based on the

soil properties that influence the ease of digging and the resistance to sloughing.

Depth to bedrock or a cemented pan, hardness of bedrock or a cemented pan, the

amount of large stones, and dense layers influence the ease of digging, filling, and

compacting. Depth to the seasonal high water table, flooding, and ponding may restrict

the period when excavations can be made. Slope influences the ease of using

machinery. Soil texture, depth to the water table, and linear extensibility (shrink-swell

potential) influence the resistance to sloughing.

Lawns and landscaping require soils on which turf and ornamental trees and shrubs

can be established and maintained. Irrigation is not considered in the ratings. The

ratings are based on the soil properties that affect plant growth and trafficability after

vegetation is established. The properties that affect plant growth are reaction; depth to

a water table; ponding; depth to bedrock or a cemented pan; the available water

capacity in the upper 40 inches; the content of salts, sodium, or calcium carbonate;

and sulfidic materials. The properties that affect trafficability are flooding, depth to a

water table, ponding, slope, stoniness, and the amount of sand, clay, or organic matter

in the surface layer.

Sanitary Facilities

Tables 15a and 15b show the degree and kind of soil limitations that affect septic

tank absorption fields, sewage lagoons, sanitary landfills, and daily cover for landfill.

The ratings are both verbal and numerical. Rating class terms indicate the extent to

which the soils are limited by all of the soil features that affect these uses. Not limited

indicates that the soil has features that are very favorable for the specified use. Good

performance and very low maintenance can be expected. Somewhat limited indicates

that the soil has features that are moderately favorable for the specified use. The

limitations can be overcome or minimized by special planning, design, or installation.

Fair performance and moderate maintenance can be expected. Very limited indicates

that the soil has one or more features that are unfavorable for the specified use. The

limitations generally cannot be overcome without major soil reclamation, special

design, or expensive installation procedures. Poor performance and high maintenance

can be expected.

Numerical ratings in the tables indicate the severity of individual limitations. The

ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

on the use (1.00) and the point at which the soil feature is not a limitation (0.00).

Septic tank absorption fields are areas in which effluent from a septic tank is

distributed into the soil through subsurface tiles or perforated pipe. Only that part of the

soil between depths of 24 and 60 inches is evaluated. The ratings are based on the
130 Soil Survey of

soil properties that affect absorption of the effluent, construction and maintenance of

the system, and public health. Permeability, depth to a water table, ponding, depth to

bedrock or a cemented pan, and flooding affect absorption of the effluent. Stones and

boulders, ice, and bedrock or a cemented pan interfere with installation. Subsidence

interferes with installation and maintenance. Excessive slope may cause lateral

seepage and surfacing of the effluent in downslope areas.

Some soils are underlain by loose sand and gravel or fractured bedrock at a depth

of less than 4 feet below the distribution lines. In these soils the absorption field may

not adequately filter the effluent, particularly when the system is new. As a result, the

ground water may become contaminated.

Sewage lagoons are shallow ponds constructed to hold sewage while aerobic

bacteria decompose the solid and liquid wastes. Lagoons should have a nearly level

floor surrounded by cut slopes or embankments of compacted soil. Nearly impervious

soil material for the lagoon floor and sides is required to minimize seepage and

contamination of ground water. Considered in the ratings are slope, permeability, depth

to a water table, ponding, depth to bedrock or a cemented pan, flooding, large stones,

and content of organic matter.

Soil permeability is a critical property affecting the suitability for sewage lagoons.

Most porous soils eventually become sealed when they are used as sites for sewage

lagoons. Until sealing occurs, however, the hazard of pollution is severe. Soils that

have a permeability rate of more than 2 inches per hour are too porous for the proper

functioning of sewage lagoons. In these soils, seepage of the effluent can result in

contamination of the ground water. Ground-water contamination is also a hazard if

fractured bedrock is within a depth of 40 inches, if the water table is high enough to

raise the level of sewage in the lagoon, or if floodwater overtops the lagoon.

A high content of organic matter is detrimental to proper functioning of the lagoon

because it inhibits aerobic activity. Slope, bedrock, and cemented pans can cause

construction problems, and large stones can hinder compaction of the lagoon floor. If

the lagoon is to be uniformly deep throughout, the slope must be gentle enough and

the soil material must be thick enough over bedrock or a cemented pan to make land

smoothing practical.

A trench sanitary landfill is an area where solid waste is placed in successive layers

in an excavated trench. The waste is spread, compacted, and covered daily with a thin

layer of soil excavated at the site. When the trench is full, a final cover of soil material

at least 2 feet thick is placed over the landfill. The ratings in the table are based on the

soil properties that affect the risk of pollution, the ease of excavation, trafficability, and

revegetation. These properties include permeability, depth to bedrock or a cemented

pan, depth to a water table, ponding, slope, flooding, texture, stones and boulders,

highly organic layers, soil reaction, and content of salts and sodium. Unless otherwise

stated, the ratings apply only to that part of the soil within a depth of about 6 feet. For

deeper trenches, onsite investigation may be needed.

Hard, nonrippable bedrock, creviced bedrock, or highly permeable strata in or

directly below the proposed trench bottom can affect the ease of excavation and the

hazard of ground-water pollution. Slope affects construction of the trenches and the

movement of surface water around the landfill. It also affects the construction and

performance of roads in areas of the landfill.

Soil texture and consistence affect the ease with which the trench is dug and the

ease with which the soil can be used as daily or final cover. They determine the

workability of the soil when dry and when wet. Soils that are plastic and sticky when

wet are difficult to excavate, grade, or compact and are difficult to place as a uniformly

thick cover over a layer of refuse.

The soil material used as the final cover for a trench landfill should be suitable for

plants. It should not have excess sodium or salts and should not be too acid. The
Knox County, Illinois 131

surface layer generally has the best workability, the highest content of organic matter,

and the best potential for plants. Material from the surface layer should be stockpiled

for use as the final cover.

In an area sanitary landfill, solid waste is placed in successive layers on the surface

of the soil. The waste is spread, compacted, and covered daily with a thin layer of soil

from a source away from the site. A final cover of soil material at least 2 feet thick is

placed over the completed landfill. The ratings in the table are based on the soil

properties that affect trafficability and the risk of pollution. These properties include

flooding, permeability, depth to a water table, ponding, slope, and depth to bedrock or

a cemented pan.

Flooding is a serious problem because it can result in pollution in areas

downstream from the landfill. If permeability is too rapid or if fractured bedrock, a

fractured cemented pan, or the water table is close to the surface, the leachate can

contaminate the water supply. Slope is a consideration because of the extra grading

required to maintain roads in the steeper areas of the landfill. Also, leachate may flow

along the surface of the soils in the steeper areas and cause difficult seepage

problems.

Daily cover for landfill is the soil material that is used to cover compacted solid

waste in an area sanitary landfill. The soil material is obtained offsite, transported to

the landfill, and spread over the waste. The ratings in the table also apply to the final

cover for a landfill. They are based on the soil properties that affect workability, the

ease of digging, and the ease of moving and spreading the material over the refuse

daily during wet and dry periods. These properties include soil texture, depth to a

water table, ponding, rock fragments, slope, depth to bedrock or a cemented pan,

reaction, and content of salts, sodium, or lime.

Loamy or silty soils that are free of large stones and excess gravel are the best

cover for a landfill. Clayey soils may be sticky and difficult to spread; sandy soils are

subject to wind erosion.

Slope affects the ease of excavation and of moving the cover material. Also, it can

influence runoff, erosion, and reclamation of the borrow area.

After soil material has been removed, the soil material remaining in the borrow area

must be thick enough over bedrock, a cemented pan, or the water table to permit

revegetation. The soil material used as the final cover for a landfill should be suitable

for plants. It should not have excess sodium, salts, or lime and should not be too

acid.

Construction Materials

Tables 16a and 16b give information about the soils as potential sources of

reclamation material, roadfill, topsoil, and sand. Normal compaction, minor processing,

and other standard construction practices are assumed.

In table 16a, the soils are rated good, fair, or poor as potential sources of

reclamation material, roadfill, and topsoil. The features that limit the soils as sources of

these materials are specified in the table. The numerical ratings given after the

specified features indicate the degree to which the features limit the soils as sources

of reclamation material, roadfill, or topsoil. The lower the number, the greater the

limitation.

Reclamation material is used in areas that have been drastically disturbed by

surface mining or similar activities. When these areas are reclaimed, layers of soil

material or unconsolidated geological material, or both, are replaced in a vertical

sequence. The reconstructed soil favors plant growth. The ratings in the table do not

apply to quarries and other mined areas that require an offsite source of
132 Soil Survey of

reconstruction material. The ratings are based on the soil properties that affect erosion

and stability of the surface and the productive potential of the reconstructed soil. These

properties include the content of sodium, salts, and calcium carbonate; reaction;

available water capacity; erodibility; texture; content of rock fragments; and content of

organic matter and other features that affect fertility.

Roadfill is soil material that is excavated in one place and used in road

embankments in another place. In this table, the soils are rated as a source of roadfill

for low embankments, generally less than 6 feet high and less exacting in design than

higher embankments.

The ratings are for the whole soil, from the surface to a depth of about 5 feet. It is

assumed that soil layers will be mixed when the soil material is excavated and spread.

The ratings are based on the amount of suitable material and on soil properties that

affect the ease of excavation and the performance of the material after it is in place.

The thickness of the suitable material is a major consideration. The ease of excavation

is affected by large stones, depth to a water table, and slope. How well the soil

performs in place after it has been compacted and drained is determined by its

strength (as inferred from the AASHTO classification of the soil) and linear extensibility

(shrink-swell potential).

Topsoil is used to cover an area so that vegetation can be established and

maintained. The upper 40 inches of a soil is evaluated for use as topsoil. Also

evaluated is the reclamation potential of the borrow area. The ratings are based on the

soil properties that affect plant growth; the ease of excavating, loading, and spreading

the material; and reclamation of the borrow area. Toxic substances, soil reaction, and

the properties that are inferred from soil texture, such as available water capacity and

fertility, affect plant growth. The ease of excavating, loading, and spreading is affected

by rock fragments, slope, depth to a water table, soil texture, and thickness of suitable

material. Reclamation of the borrow area is affected by slope, depth to a water table,

rock fragments, depth to bedrock or a cemented pan, and toxic material.

The surface layer of most soils is generally preferred for topsoil because of its

organic matter content. Organic matter greatly increases the absorption and retention

of moisture and nutrients for plant growth.

Sand and gravel are natural aggregates suitable for commercial use with a minimum

of processing. They are used in many kinds of construction. Specifications for each

use vary widely. Because all of the soils in Knox County are rated as poor sources of

gravel, this interpretation is not included in table 16b. All of the soils in the county are

rated as poor sources of sand, except for the Alvin and Camden soils. When the ratings

are made, only the likelihood of finding material in suitable quantity is evaluated. The

suitability of the material for specific purposes is not evaluated, nor are factors that

affect excavation of the material. The properties used to evaluate the soil as a source

of sand or gravel are gradation of grain sizes (as indicated by the Unified classification

of the soil), the thickness of suitable material, and the content of rock fragments. If the

bottom layer of the soil contains sand or gravel, the soil is considered a likely source

regardless of thickness. The assumption is that the sand or gravel layer below the

depth of observation exceeds the minimum thickness.

In table 16b, the soils are rated good, fair, or poor as potential sources of sand. A

rating of good or fair means that the source material is likely to be in or below the soil.

The bottom layer and the thickest layer of the soils are assigned numerical ratings.

These ratings indicate the likelihood that the layer is a source of sand. The number

0.00 indicates that the layer is a poor source. The number 1.00 indicates that the layer

is a good source. A number between 0.00 and 1.00 indicates the degree to which the

layer is a likely source.
Knox County, Illinois 133

Water Management

Tables 17a and 17b give information on the soil properties and site features that

affect water management. The degree and kind of soil limitations are given for pond

reservoir areas; embankments, dikes, and levees; aquifer-fed excavated ponds;

constructing grassed waterways and surface drains; constructing terraces and

diversions; and tile drains and underground outlets. The ratings are both verbal and

numerical. Rating class terms indicate the extent to which the soils are limited by all of

the soil features that affect these uses. Not limited indicates that the soil has features

that are very favorable for the specified use. Good performance and very low

maintenance can be expected. Somewhat limited indicates that the soil has features

that are moderately favorable for the specified use. The limitations can be overcome or

minimized by special planning, design, or installation. Fair performance and moderate

maintenance can be expected. Very limited indicates that the soil has one or more

features that are unfavorable for the specified use. The limitations generally cannot be

overcome without major soil reclamation, special design, or expensive installation

procedures. Poor performance and high maintenance can be expected.

Numerical ratings in the tables indicate the severity of individual limitations. The

ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate

gradations between the point at which a soil feature has the greatest negative impact

on the use (1.00) and the point at which the soil feature is not a limitation (0.00).

Pond reservoir areas hold water behind a dam or embankment. Soils best suited to

this use have low seepage potential in the upper 60 inches. The seepage potential is

determined by the permeability of the soil and the depth to fractured bedrock or other

permeable material. Excessive slope can affect the storage capacity of the reservoir

area.

Embankments, dikes, and levees are raised structures of soil material, generally

less than 20 feet high, constructed to impound water or to protect land against

overflow. Embankments that have zoned construction (core and shell) are not

considered. In this table, the soils are rated as a source of material for embankment

fill. The ratings apply to the soil material below the surface layer to a depth of about 5

feet. It is assumed that soil layers will be uniformly mixed and compacted during

construction.

The ratings do not indicate the ability of the natural soil to support an embankment.

Soil properties to a depth even greater than the height of the embankment can affect

performance and safety of the embankment. Generally, deeper onsite investigation is

needed to determine these properties.

Soil material in embankments must be resistant to seepage, piping, and erosion

and have favorable compaction characteristics. Unfavorable features include less than

5 feet of suitable material and a high content of stones or boulders, organic matter, or

salts or sodium. A high water table affects the amount of usable material. It also affects

trafficability.

Aquifer-fed excavated ponds are pits or dugouts that extend to a ground-water

aquifer or to a depth below a permanent water table. Excluded are ponds that are fed

only by surface runoff and embankment ponds that impound water 3 feet or more

above the original surface. Excavated ponds are affected by depth to a permanent

water table, permeability of the aquifer, and quality of the water as inferred from the

salinity of the soil. Depth to bedrock and the content of large stones affect the ease of

excavation.

Grassed waterways and surface drains are natural or constructed channels,

generally broad and shallow, that conduct surface water to outlets at a nonerosive

velocity. Large stones, wetness, slope, and depth to bedrock affect the construction of
134

grassed waterways and surface drains. A hazard of wind erosion, a low available water

capacity, restricted rooting depth, toxic substances such as salts and sodium, and

restricted permeability adversely affect the growth and maintenance of the grass after

construction.

Terraces and diversions are embankments or a combination of channels and ridges

constructed across a slope to control erosion and conserve moisture by intercepting

runoff. Slope, wetness, large stones, and depth to bedrock affect the construction of

terraces and diversions. A restricted rooting depth, a severe hazard of wind erosion or

water erosion, an excessively coarse texture, and restricted permeability adversely

affect maintenance.

Tile drains and underground outlets are used in some areas to remove excess

subsurface and surface water from the soil. The ratings in the table apply to the soil in

its undisturbed condition and do not include consideration of current land use. Depth to

bedrock, a dense layer, or a cemented pan, the content of large stones, and the

content of clay influence the ease of digging, filling, and compacting. A seasonal high

water table, ponding, and flooding may restrict the period when excavations can be

made. The slope influences the use of machinery. Soil texture and depth to the water

table influence the resistance to sloughing. Subsidence of organic layers influences

grade and stability of tile drains.
135

Data relating to soil properties are collected during the course of the soil survey.

Soil properties are ascertained by field examination of the soils and by laboratory

index testing of some benchmark soils. Established standard procedures are followed.

During the survey, many shallow borings are made and examined to identify and

classify the soils and to delineate them on the soil maps. Samples are taken from

some typical profiles and tested in the laboratory to determine particle-size

distribution, plasticity, and compaction characteristics.

Estimates of soil properties are based on field examinations, on laboratory tests of

samples from the survey area, and on laboratory tests of samples of similar soils in

nearby areas. Tests verify field observations, verify properties that cannot be estimated

accurately by field observation, and help to characterize key soils.

The estimates of soil properties are shown in tables. They include engineering index

properties, physical and chemical properties, and pertinent soil and water features.

Engineering Index Properties

Table 18 gives the engineering classifications and the range of index properties for

the layers of each soil in the survey area.

Depth to the upper and lower boundaries of each layer is indicated.

Texture is given in the standard terms used by the U.S. Department of Agriculture.

These terms are defined according to percentages of sand, silt, and clay in the fraction

of the soil that is less than 2 millimeters in diameter. “Loam,” for example, is soil that is

7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent sand. If the content

of particles coarser than sand is 15 percent or more, an appropriate modifier is added,

for example, “gravelly.” Textural terms are defined in the Glossary.

Classification of the soils is determined according to the Unified soil classification

system (ASTM, 2005) and the system adopted by the American Association of State

Highway and Transportation Officials (AASHTO, 2004).

The Unified system classifies soils according to properties that affect their use as

construction material. Soils are classified according to particle-size distribution of the

fraction less than 3 inches in diameter and according to plasticity index, liquid limit,

and organic matter content. Sandy and gravelly soils are identified as GW, GP, GM,

GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and OH; and

highly organic soils as PT. Soils exhibiting engineering properties of two groups can

have a dual classification, for example, CL-ML.

The AASHTO system classifies soils according to those properties that affect

roadway construction and maintenance. In this system, the fraction of a mineral soil

that is less than 3 inches in diameter is classified in one of seven groups from A-1

through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index.

Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At the

other extreme, soils in group A-7 are fine grained. Highly organic soils are classified in

group A-8 on the basis of visual inspection.

If laboratory data are available, the A-1, A-2, and A-7 groups are further classified

as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional

refinement, the suitability of a soil as subgrade material can be indicated by a group

Soil Properties
136 Soil Survey of

index number. Group index numbers range from 0 for the best subgrade material to 20

or higher for the poorest.

Rock fragments larger than 10 inches in diameter and 3 to 10 inches in diameter

are indicated as a percentage of the total soil on a dry-weight basis. The percentages

are estimates determined mainly by converting volume percentage in the field to

weight percentage.

Percentage (of soil particles) passing designated sieves is the percentage of the

soil fraction less than 3 inches in diameter based on an ovendry weight. The sieves,

numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00,

0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests of

soils sampled in the survey area and in nearby areas and on estimates made in the

field.

Liquid limit and plasticity index (Atterberg limits) indicate the plasticity

characteristics of a soil. The estimates are based on test data from the survey area or

from nearby areas and on field examination.

The estimates of particle-size distribution, liquid limit, and plasticity index are

generally rounded to the nearest 5 percent. Thus, if the ranges of gradation and

Atterberg limits extend a marginal amount (1 or 2 percentage points) across

classification boundaries, the classification in the marginal zone is generally omitted in

the table.

Physical Properties

Table 19 shows estimates of some physical characteristics and features that affect

soil behavior. These estimates are given for the layers of each soil in the survey area.

The estimates are based on field observations and on test data for these and similar

soils.

Depth to the upper and lower boundaries of each layer is indicated.

Clay as a soil separate consists of mineral soil particles that are less than 0.002

millimeter in diameter. In table 19, the estimated clay content of each soil layer is given

as a percentage, by weight, of the soil material that is less than 2 millimeters in

diameter.

The amount and kind of clay affect the fertility and physical condition of the soil and

the ability of the soil to adsorb cations and to retain moisture. They influence shrinkswell potential, permeability, plasticity, the ease of soil dispersion, and other soil

properties. The amount and kind of clay in a soil also affect tillage and earthmoving

operations.

Moist bulk density is the weight of soil (ovendry) per unit volume. Volume is

measured when the soil is at field moisture capacity, that is, the moisture content at

1

/3- or 1/10-bar (33kPa or 10kPa) moisture tension. Weight is determined after the soil is

dried at 105 degrees C. In the table, the estimated moist bulk density of each soil

horizon is expressed in grams per cubic centimeter of soil material that is less than 2

millimeters in diameter. Bulk density data are used to compute shrink-swell potential,

available water capacity, total pore space, and other soil properties. The moist bulk

density of a soil indicates the pore space available for water and roots. Depending on

soil texture, a bulk density of more than 1.4 can restrict water storage and root

penetration. Moist bulk density is influenced by texture, kind of clay, content of organic

matter, and soil structure.

Permeability (Ksat ) refers to the ability of a soil to transmit water or air. The term

“permeability,” as used in soil surveys, indicates saturated hydraulic conductivity (Ksat ).

The estimates in the table indicate the rate of water movement, in inches per hour,

when the soil is saturated. They are based on soil characteristics observed in the field,

particularly structure, porosity, and texture. Permeability is considered in the design of

soil drainage systems and septic tank absorption fields.
Knox County, Illinois 137

Available water capacity refers to the quantity of water that the soil is capable of

storing for use by plants. The capacity for water storage is given in inches of water per

inch of soil for each soil layer. The capacity varies, depending on soil properties that

affect retention of water. The most important properties are the content of organic

matter, soil texture, bulk density, and soil structure. Available water capacity is an

important factor in the choice of plants or crops to be grown and in the design and

management of irrigation systems. Available water capacity is not an estimate of the

quantity of water actually available to plants at any given time.

Linear extensibility refers to the change in length of an unconfined clod as moisture

content is decreased from a moist to a dry state. It is an expression of the volume

change between the water content of the clod at 1/3- or 1/10-bar tension (33kPa or

10kPa tension) and oven dryness. The volume change is reported in the table as

percent change for the whole soil. Volume change is influenced by the amount and

type of clay minerals in the soil.

Linear extensibility is used to determine the shrink-swell potential of soils. The

shrink-swell potential is low if the soil has a linear extensibility of less than 3 percent;

moderate if 3 to 6 percent; high if 6 to 9 percent; and very high if more than 9 percent.

If the linear extensibility is more than 3, shrinking and swelling can cause damage to

buildings, roads, and other structures and to plant roots. Special design commonly is

needed.

Organic matter is the plant and animal residue in the soil at various stages of

decomposition. In table 19, the estimated content of organic matter is expressed as a

percentage, by weight, of the soil material that is less than 2 millimeters in diameter.

The content of organic matter in a soil can be maintained by returning crop residue

to the soil. Organic matter has a positive effect on available water capacity, water

infiltration, soil organism activity, and tilth. It is a source of nitrogen and other nutrients

for crops and soil organisms.

Erosion factors are shown in table 19 as the K factor (Kw and Kf) and the T factor.

Erosion factor K indicates the susceptibility of a soil to sheet and rill erosion by water.

Factor K is one of six factors used in the Universal Soil Loss Equation (USLE) and the

Revised Universal Soil Loss Equation (RUSLE) to predict the average annual rate of

soil loss by sheet and rill erosion in tons per acre per year. The estimates are based

primarily on percentage of silt, sand, and organic matter and on soil structure and

permeability. Values of K range from 0.02 to 0.69. Other factors being equal, the higher

the value, the more susceptible the soil is to sheet and rill erosion by water.

Erosion factor Kw indicates the erodibility of the whole soil. The estimates are

modified by the presence of rock fragments.

Erosion factor Kf indicates the erodibility of the fine-earth fraction, or the material

less than 2 millimeters in size.

Erosion factor T is an estimate of the maximum average annual rate of soil erosion

by wind or water that can occur without affecting crop productivity over a sustained

period. The rate is in tons per acre per year.

Wind erodibility groups are made up of soils that have similar properties affecting

their susceptibility to wind erosion in cultivated areas. The soils assigned to group 1

are the most susceptible to wind erosion, and those assigned to group 8 are the least

susceptible. The groups are described in the “National Soil Survey Handbook” (USDA,

NRCS).

Wind erodibility index is a numerical value indicating the susceptibility of soil to

wind erosion, or the tons per acre per year that can be expected to be lost to wind

erosion. There is a close correlation between wind erosion and the texture of the

surface layer, the size and durability of surface clods, rock fragments, organic matter,

and a calcareous reaction. Soil moisture and frozen soil layers also influence wind

erosion.
138 Soil Survey of

Chemical Properties

Table 20 shows estimates of some chemical characteristics and features that affect

soil behavior. These estimates are given for the layers of each soil in the survey area.

The estimates are based on field observations and on test data for these and similar

soils.

Depth to the upper and lower boundaries of each layer is indicated.

Cation-exchange capacity is the total amount of extractable bases that can be held

by the soil, expressed in terms of milliequivalents per 100 grams of soil at neutrality

(pH 7.0) or at some other stated pH value. Soils having a low cation-exchange

capacity hold fewer cations and may require more frequent applications of fertilizer

than soils having a high cation-exchange capacity. The ability to retain cations reduces

the hazard of ground-water pollution.

Soil reaction is a measure of acidity or alkalinity. The pH of each soil horizon is

based on many field tests. For many soils, values have been verified by laboratory

analyses. Soil reaction is important in selecting crops and other plants, in evaluating

soil amendments for fertility and stabilization, and in determining the risk of corrosion.

Calcium carbonate equivalent is the percent of carbonates, by weight, in the fraction

of the soil less than 2 millimeters in size. The availability of plant nutrients is influenced

by the amount of carbonates in the soil. Incorporating nitrogen fertilizer into calcareous

soils helps to prevent nitrite accumulation and ammonium-N volatilization.

Water Features

Table 21 gives estimates of various water features. The estimates are used in land

use planning that involves engineering considerations.

Hydrologic soil groups are based on estimates of runoff potential. Soils are

assigned to one of four groups according to the rate of water infiltration when the soils

are not protected by vegetation, are thoroughly wet, and receive precipitation from

long-duration storms.

The four hydrologic soil groups are:

Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly

wet. These consist mainly of deep, well drained to excessively drained sands or

gravelly sands. These soils have a high rate of water transmission.

Group B. Soils having a moderate infiltration rate when thoroughly wet. These

consist chiefly of moderately deep or deep, moderately well drained or well drained

soils that have moderately fine texture to moderately coarse texture. These soils have

a moderate rate of water transmission.

Group C. Soils having a slow infiltration rate when thoroughly wet. These consist

chiefly of soils having a layer that impedes the downward movement of water or soils

of moderately fine texture or fine texture. These soils have a slow rate of water

transmission.

Group D. Soils having a very slow infiltration rate (high runoff potential) when

thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential,

soils that have a high water table, soils that have a claypan or clay layer at or near the

surface, and soils that are shallow over nearly impervious material. These soils have a

very slow rate of water transmission.

If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is

for drained areas and the second is for undrained areas.

Ponding is standing water in a closed depression. Unless a drainage system is

installed, the water is removed only by percolation, transpiration, or evaporation. Table

21 indicates surface water depth and the duration and frequency of ponding. Duration

is expressed as very brief if less than 2 days, brief if 2 to 7 days, long if 7 to 30 days,
Knox County, Illinois 139

and very long if more than 30 days. Frequency is expressed as none, rare, occasional,

and frequent. None means that ponding is not probable; rare that it is unlikely but

possible under unusual weather conditions (the chance of ponding is nearly 0 percent

to 5 percent in any year); occasional that it occurs, on the average, once or less in 2

years (the chance of ponding is 5 to 50 percent in any year); and frequent that it

occurs, on the average, more than once in 2 years (the chance of ponding is more

than 50 percent in any year).

Flooding is the temporary inundation of an area caused by overflowing streams, by

runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall

or snowmelt is not considered flooding, and water standing in swamps and marshes is

considered ponding rather than flooding.

Duration and frequency are estimated. Duration is expressed as extremely brief if

0.1 hour to 4 hours, very brief if 4 hours to 2 days, brief if 2 to 7 days, long if 7 to 30

days, and very long if more than 30 days. Frequency is expressed as none, very rare,

rare, occasional, frequent, and very frequent. None means that flooding is not

probable; very rare that it is very unlikely but possible under extremely unusual

weather conditions (the chance of flooding is less than 1 percent in any year); rare that

it is unlikely but possible under unusual weather conditions (the chance of flooding is 1

to 5 percent in any year); occasional that it occurs infrequently under normal weather

conditions (the chance of flooding is 5 to 50 percent in any year); frequent that it is

likely to occur often under normal weather conditions (the chance of flooding is more

than 50 percent in any year but is less than 50 percent in all months in any year); and

very frequent that it is likely to occur very often under normal weather conditions (the

chance of flooding is more than 50 percent in all months of any year).

The information is based on evidence in the soil profile, namely thin strata of gravel,

sand, silt, or clay deposited by floodwater; irregular decrease in organic matter content

with increasing depth; and little or no horizon development.

Also considered are local information about the extent and levels of flooding and the

relation of each soil on the landscape to historic floods. Information on the extent of

flooding based on soil data is less specific than that provided by detailed engineering

surveys that delineate flood-prone areas at specific flood frequency levels.

Water table refers to a saturated zone in the soil. Table 21 indicates the depth to the

top (upper limit) and base (lower limit) of the saturated zone in most years. Estimates

of the upper and lower limits are based mainly on observations of the water table at

selected sites and on evidence of a saturated zone, namely grayish colors or mottles

(redoximorphic features) in the soil. A saturated zone that lasts for less than a month is

not considered a water table.

The months in the table indicate the portion of the year in which the water table is

likely to be a concern.

The table also shows the kind of water table—that is, perched or apparent. An

apparent water table is a thick zone of free water in the soil. It is indicated by the level

at which water stands in an uncased borehole after adequate time is allowed for

adjustment in the surrounding soil. A perched water table is water standing above an

unsaturated zone. In places an upper, or perched, water table is separated from a

lower one by a dry zone.

Soil Features

Table 22 gives estimates of various soil features. The estimates are used in land

use planning that involves engineering considerations.

A restrictive layer is a nearly continuous layer that has one or more physical,

chemical, or thermal properties that significantly impede the movement of water and

air through the soil or that restrict roots or otherwise provide an unfavorable root

environment. Examples are bedrock, cemented layers, dense layers, and frozen
140

layers. Depth to top is the vertical distance from the soil surface to the upper boundary

of the restrictive layer.

Potential for frost action is the likelihood of upward or lateral expansion of the soil

caused by the formation of segregated ice lenses (frost heave) and the subsequent

collapse of the soil and loss of strength on thawing. Frost action occurs when moisture

moves into the freezing zone of the soil. Temperature, texture, density, permeability,

content of organic matter, and depth to the water table are the most important factors

considered in evaluating the potential for frost action. It is assumed that the soil is not

insulated by vegetation or snow and is not artificially drained. Silty and highly

structured, clayey soils that have a high water table in winter are the most susceptible

to frost action. Well drained, very gravelly, or very sandy soils are the least susceptible.

Frost heave and low soil strength during thawing cause damage to pavements and

other rigid structures.

Risk of corrosion pertains to potential soil-induced electrochemical or chemical

action that corrodes or weakens uncoated steel or concrete. The rate of corrosion of

uncoated steel is related to such factors as soil moisture, particle-size distribution,

acidity, and electrical conductivity of the soil. The rate of corrosion of concrete is based

mainly on the sulfate and sodium content, texture, moisture content, and acidity of the

soil. Special site examination and design may be needed if the combination of factors

results in a severe hazard of corrosion. The steel or concrete in installations that

intersect soil boundaries or soil layers is more susceptible to corrosion than the steel

or concrete in installations that are entirely within one kind of soil or within one soil

layer.

For uncoated steel, the risk of corrosion, expressed as low, moderate, or high, is

based on soil drainage class, total acidity, electrical resistivity near field capacity, and

electrical conductivity of the saturation extract.

For concrete, the risk of corrosion also is expressed as low, moderate, or high. It is

based on soil texture, acidity, and amount of sulfates in the saturation extract.
141

American Association of State Highway and Transportation Officials (AASHTO). 2004.

Standard specifications for transportation materials and methods of sampling and

testing. 24th edition.

American Society for Testing and Materials (ASTM). 2005. Standard classification of

soils for engineering purposes. ASTM Standard D2487–00.

Coffey, George N., C.W. Ely, and C.J. Mann. 1904. Soil survey of Knox County, Illinois.

U.S. Department of Agriculture, Bureau of Soils.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of

wetlands and deep water habitats of the United States. U.S. Fish and Wildlife Service.

FWS/OBS–79/31.

Federal Register. July 13, 1994. Changes in hydric soils of the United States.

Federal Register. February 24, 1995. Hydric soils of the United States.

Fehrenbacher, J.B., I.J. Jansen, B.W. Ray, J.D. Alexander, and T.S. Harris. 1977. Soil

associations of Knox County, Illinois. University of Illinois, College of Agriculture

Special Publication 46.

Hopkins, Cyril G., J.G. Mosier, J.H. Pettit, and J.E. Readhimer. 1913. Knox County

soils. University of Illinois Agricultural Experiment Station Soil Report No. 6.

Hurt, G.W., P.M. Whited, and R.F. Pringle, editors. Version 5.0, 2002. Field indicators of

hydric soils in the United States.

Illinois Agricultural Statistics Service. 2003. Illinois agricultural statistics 2003 annual

summary.

Jenny, Hans. 1941. Factors of soil formation.

National Research Council. 1995. Wetlands: Characteristics and boundaries.

Piskin, K., and R. Bergstrom. 1975. Glacial drift in Illinois: Thickness and character.

Illinois Geological Survey Circular 490.

Russell, Kenneth. 1968. Knox County surface water resources. Illinois Department of

Conservation, Division of Fish.

Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S.

Department of Agriculture Handbook 18.

References
142

Soil Survey Staff. 1998. Keys to soil taxonomy. 8th edition. U.S. Department of

Agriculture, Natural Resources Conservation Service.

Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making

and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service. U.S.

Department of Agriculture Handbook 436.

Soil Survey Staff. 2003. Keys to soil taxonomy. 9th edition. U.S. Department of

Agriculture, Natural Resources Conservation Service.

Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and

Delaware Department of Natural Resources and Environmental Control, Wetlands

Section.

United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of

Engineers wetlands delineation manual. Waterways Experiment Station Technical

Report Y–87–1.

United States Department of Agriculture. 1961. Land capability classification. U.S.

Department of Agriculture Handbook 210.

United States Department of Agriculture. 1981. Land resource regions and major land

resource areas of the United States. U.S. Department of Agriculture Handbook 296.

(Map revised in 2004.)

United States Department of Agriculture, Natural Resources Conservation Service.

National soil survey handbook, title 430–VI. http://soils.usda.gov/technical/

United States Department of Commerce, Bureau of the Census. 2002. 2000 census of

population and housing.

Wascher, H.L., and others. 1971. Loess soils of northwest Illinois. University of Illinois

Agricultural Experiment Station Bulletin 739.

Willman, H.B., and J.C. Frye. 1970. Pleistocene stratigraphy of Illinois. Illinois

Geological Survey Bulletin 94.

Windhorn, Roger. 1986. Soil survey of Knox County, Illinois.
143

Many of the terms relating to landforms, geology, and geomorphology are defined in

more detail in the “National Soil Survey Handbook” (available in local offices of the

Natural Resources Conservation Service or on the Internet).

Ablation till. Loose, relatively permeable earthy material deposited during the

downwasting of nearly static glacial ice, either contained within or accumulated on

the surface of the glacier.

Aeration, soil. The exchange of air in soil with air from the atmosphere. The air in a

well aerated soil is similar to that in the atmosphere; the air in a poorly aerated soil

is considerably higher in carbon dioxide and lower in oxygen.

Aggregate, soil. Many fine particles held in a single mass or cluster. Natural soil

aggregates, such as granules, blocks, or prisms, are called peds. Clods are

aggregates produced by tillage or logging.

Alluvial fan. The fanlike deposit of a stream where it issues from a gorge upon a plain

or of a tributary stream near or at its junction with its main stream.

Alluvium. Unconsolidated material, such as gravel, sand, silt, clay, and various

mixtures of these, deposited on land by running water.

Alpha,alpha-dipyridyl. A compound that when dissolved in ammonium acetate is

used to detect the presence of reduced iron (Fe II) in the soil. A positive reaction

implies reducing conditions and the likely presence of redoximorphic features.

Animal unit month (AUM). The amount of forage required by one mature cow of

approximately 1,000 pounds weight, with or without a calf, for 1 month.

Aquic conditions. Current soil wetness characterized by saturation, reduction, and

redoximorphic features.

Argillic horizon. A subsoil horizon characterized by an accumulation of illuvial clay.

Aspect. The direction toward which a slope faces. Also called slope aspect.

Available water capacity (available moisture capacity). The capacity of soils to hold

water available for use by most plants. It is commonly defined as the difference

between the amount of soil water at field moisture capacity and the amount at

wilting point. It is commonly expressed as inches of water per inch of soil. The

capacity, in inches, in a 60-inch profile or to a limiting layer is expressed as:

Very low ..............................................................0 to 3

Low ...................................................................... 3 to 6

Moderate ............................................................. 6 to 9

High ...................................................................9 to 12

Very high ................................................ more than 12

Backslope. The position that forms the steepest and generally linear, middle portion of

a hillslope. In profile, backslopes are commonly bounded by a convex shoulder

above and a concave footslope below.

Base saturation. The degree to which material having cation-exchange properties is

saturated with exchangeable bases (sum of Ca, Mg, Na, and K), expressed as a

percentage of the total cation-exchange capacity.

Beach deposits. Material, such as sand and gravel, that is generally laid down

parallel to an active or relict shoreline of a postglacial or glacial lake.

Glossary
144 Soil Survey of

Beach ridge. A low, essentially continuous mound of beach or beach-and-dune

material accumulated by the action of waves and currents on the backshore of a

beach, beyond the present limit of storm waves or the reach of ordinary tides, and

occurring singly or as one of a series of approximately parallel deposits. The

ridges are roughly parallel to the shoreline and represent successive positions of

an advancing shoreline.

Bedding plane. A planar or nearly planar bedding surface that visibly separates each

successive layer of stratified sediment or rock (of the same or different lithology)

from the preceding or following layer; a plane of deposition. It commonly marks a

change in the circumstances of deposition and may show a parting, a color

difference, a change in particle size, or various combinations of these. The term is

commonly applied to any bedding surface, even one that is conspicuously bent or

deformed by folding.

Bedrock. The solid rock that underlies the soil and other unconsolidated material or

that is exposed at the surface.

Bedrock-controlled topography. A landscape where the configuration and relief of

the landforms are determined or strongly influenced by the underlying bedrock.

Bench terrace. A raised, level or nearly level strip of earth constructed on or nearly on

a contour, supported by a barrier of rocks or similar material, and designed to

make the soil suitable for tillage and to prevent accelerated erosion.

Blowout. A saucer-, cup-, or trough-shaped depression formed by wind erosion on a

preexisting dune or other sand deposit, especially in an area of shifting sand or

loose soil or where protective vegetation is disturbed or destroyed; the adjoining

accumulation of sand derived from the depression, where recognizable, is

commonly included. Blowouts are commonly small.

Bog. Waterlogged, spongy ground, consisting primarily of mosses, containing acidic,

decaying vegetation (such as sphagnum, sedges, and heaths) that develops into

peat.

Boulders. Rock fragments larger than 2 feet (60 centimeters) in diameter.

Calcareous soil. A soil containing enough calcium carbonate (commonly combined

with magnesium carbonate) to effervesce visibly when treated with cold, dilute

hydrochloric acid.

Canopy. The leafy crown of trees or shrubs. (See Crown.)

Capillary water. Water held as a film around soil particles and in tiny spaces between

particles. Surface tension is the adhesive force that holds capillary water in the

soil.

Catena. A sequence, or “chain,” of soils on a landscape that formed in similar kinds of

parent material and under similar climatic conditions but that have different

characteristics as a result of differences in relief and drainage.

Cation. An ion carrying a positive charge of electricity. The common soil cations are

calcium, potassium, magnesium, sodium, and hydrogen.

Cation-exchange capacity. The total amount of exchangeable cations that can be

held by the soil, expressed in terms of milliequivalents per 100 grams of soil at

neutrality (pH 7.0) or at some other stated pH value. The term, as applied to soils,

is synonymous with base-exchange capacity but is more precise in meaning.

Chemical treatment. Control of unwanted vegetation through the use of chemicals.

Chiseling. Tillage with an implement having one or more soil-penetrating points that

shatter or loosen hard, compacted layers to a depth below normal plow depth.

Clay. As a soil separate, the mineral soil particles less than 0.002 millimeter in

diameter. As a soil textural class, soil material that is 40 percent or more clay, less

than 45 percent sand, and less than 40 percent silt.

Clay depletions. See Redoximorphic features.

Clay film. A thin coating of oriented clay on the surface of a soil aggregate or lining

pores or root channels. Synonyms: clay coating, clay skin.
Knox County, Illinois 145

Climax plant community. The stabilized plant community on a particular site. The

plant cover reproduces itself and does not change so long as the environment

remains the same.

Coarse textured soil. Sand or loamy sand.

Cobble (or cobblestone). A rounded or partly rounded fragment of rock 3 to 10

inches (7.6 to 25 centimeters) in diameter.

Cobbly soil material. Material that has 15 to 35 percent, by volume, rounded or

partially rounded rock fragments 3 to 10 inches (7.6 to 25 centimeters) in

diameter. Very cobbly soil material has 35 to 60 percent of these rock fragments,

and extremely cobbly soil material has more than 60 percent.

COLE (coefficient of linear extensibility). See Linear extensibility.

Colluvium. Unconsolidated, unsorted earth material being transported or deposited

on side slopes and/or at the base of slopes by mass movement (e.g., direct

gravitational action) and by local, unconcentrated runoff.

Complex slope. Irregular or variable slope. Planning or establishing terraces,

diversions, and other water-control structures on a complex slope is difficult.

Complex, soil. A map unit of two or more kinds of soil or miscellaneous areas in such

an intricate pattern or so small in area that it is not practical to map them

separately at the selected scale of mapping. The pattern and proportion of the

soils or miscellaneous areas are somewhat similar in all areas.

Concretions. Cemented bodies with crude internal symmetry organized around a point,

a line, or a plane. They typically take the form of concentric layers visible to the

naked eye. Calcium carbonate, iron oxide, and manganese oxide are common

compounds making up concretions. If formed in place, concretions of iron oxide

or manganese oxide are generally considered a type of redoximorphic

concentration.

Conservation cropping system. Growing crops in combination with needed cultural

and management practices. In a good conservation cropping system, the soilimproving crops and practices more than offset the effects of the soil-depleting

crops and practices. Cropping systems are needed on all tilled soils. Soilimproving practices in a conservation cropping system include the use of rotations

that contain grasses and legumes and the return of crop residue to the soil. Other

practices include the use of green manure crops of grasses and legumes, proper

tillage, adequate fertilization, and weed and pest control.

Conservation tillage. A tillage system that does not invert the soil and that leaves a

protective amount of crop residue on the surface throughout the year.

Consistence, soil. Refers to the degree of cohesion and adhesion of soil material and

its resistance to deformation when ruptured. Consistence includes resistance of

soil material to rupture and to penetration; plasticity, toughness, and stickiness of

puddled soil material; and the manner in which the soil material behaves when

subject to compression. Terms describing consistence are defined in the “Soil

Survey Manual.”

Contour stripcropping. Growing crops in strips that follow the contour. Strips of grass

or close-growing crops are alternated with strips of clean-tilled crops or summer

fallow.

Coprogenous earth (sedimentary peat). A type of limnic layer composed

predominantly of fecal material derived from aquatic animals.

Corrosion (geomorphology). A process of erosion whereby rocks and soil are

removed or worn away by natural chemical processes, especially by the solvent

action of running water, but also by other reactions, such as hydrolysis, hydration,

carbonation, and oxidation.

Corrosion (soil survey interpretations). Soil-induced electrochemical or chemical

action that dissolves or weakens concrete or uncoated steel.
146 Soil Survey of

Cover crop. A close-growing crop grown primarily to improve and protect the soil

between periods of regular crop production, or a crop grown between trees and

vines in orchards and vineyards.

Crop residue management. Returning crop residue to the soil, which helps to

maintain soil structure, organic matter content, and fertility and helps to control

erosion.

Cropping system. Growing crops according to a planned system of rotation and

management practices.

Crown. The upper part of a tree or shrub, including the living branches and their

foliage.

Culmination of the mean annual increment (CMAI). The average annual increase

per acre in the volume of a stand. Computed by dividing the total volume of the

stand by its age. As the stand increases in age, the mean annual increment

continues to increase until mortality begins to reduce the rate of increase. The

point where the stand reaches its maximum annual rate of growth is called the

culmination of the mean annual increment.

Cutbanks cave (in tables). The walls of excavations tend to cave in or slough.

Deferred grazing. Postponing grazing or resting grazing land for a prescribed period.

Dense layer (in tables). A very firm, massive layer that has a bulk density of more than

1.8 grams per cubic centimeter. Such a layer affects the ease of digging and can

affect filling and compacting.

Depression. Any relatively sunken part of the Earth’s surface; especially a low-lying

area surrounded by higher ground. A closed depression has no natural outlet for

surface drainage. An open depression has a natural outlet for surface drainage.

Depth, soil. Generally, the thickness of the soil over bedrock. Very deep soils are more

than 60 inches deep over bedrock; deep soils, 40 to 60 inches; moderately deep,

20 to 40 inches; shallow, 10 to 20 inches; and very shallow, less than 10 inches.

Diversion (or diversion terrace). A ridge of earth, generally a terrace, built to protect

downslope areas by diverting runoff from its natural course.

Drainage class (natural). Refers to the frequency and duration of wet periods under

conditions similar to those under which the soil formed. Alterations of the water

regime by human activities, either through drainage or irrigation, are not a

consideration unless they have significantly changed the morphology of the soil.

Seven classes of natural soil drainage are recognized—excessively drained,

somewhat excessively drained, well drained, moderately well drained, somewhat

poorly drained, poorly drained, and very poorly drained. These classes are defined

in the “Soil Survey Manual.”

Drainage, surface. Runoff, or surface flow of water, from an area.

Drainageway. A general term for a course or channel along which water moves in

draining an area. A term restricted to relatively small, linear depressions that at

some time move concentrated water and either do not have a defined channel or

have only a small defined channel.

Drift. A general term applied to all mineral material (clay, silt, sand, gravel, and

boulders) transported by a glacier and deposited directly by or from the ice or

transported by running water emanating from a glacier. Drift includes unstratified

material (till) that forms moraines and stratified deposits that form outwash plains,

eskers, kames, varves, and glaciofluvial sediments. The term is generally applied

to Pleistocene glacial deposits in areas that no longer contain glaciers.

Dune. A low mound, ridge, bank, or hill of loose, windblown granular material

(generally sand), either barren and capable of movement from place to place or

covered and stabilized with vegetation but retaining its characteristic shape.

Eluviation. The movement of material in true solution or colloidal suspension from one

place to another within the soil. Soil horizons that have lost material through

eluviation are eluvial; those that have received material are illuvial.
Knox County, Illinois 147

Endosaturation. A type of saturation of the soil in which all horizons between the

upper boundary of saturation and a depth of 2 meters are saturated.

Eolian deposit. Sand-, silt-, or clay-sized clastic material transported and deposited

primarily by wind, commonly in the form of a dune or a sheet of sand or loess.

Ephemeral stream. A stream, or reach of a stream, that flows only in direct response

to precipitation. It receives no long-continued supply from melting snow or other

source, and its channel is above the water table at all times.

Episaturation. A type of saturation indicating a perched water table in a soil in which

saturated layers are underlain by one or more unsaturated layers within 2 meters

of the surface.

Erosion. The wearing away of the land surface by water, wind, ice, or other geologic

agents and by such processes as gravitational creep.

Erosion (geologic). Erosion caused by geologic processes acting over long

geologic periods and resulting in the wearing away of mountains and the building

up of such landscape features as flood plains and coastal plains. Synonym: natural

erosion.

Erosion (accelerated). Erosion much more rapid than geologic erosion, mainly as

a result of human or animal activities or of a catastrophe in nature, such as a fire,

that exposes the surface.

Escarpment. A relatively continuous and steep slope or cliff breaking the general

continuity of more gently sloping land surfaces and resulting from erosion or

faulting. Most commonly applied to cliffs produced by differential erosion.

Synonym: scarp.

Esker. A long, narrow, sinuous, steep-sided ridge of stratified sand and gravel

deposited as the bed of a stream flowing in an ice tunnel within or below the ice

(subglacial) or between ice walls on top of the ice of a wasting glacier and left

behind as high ground when the ice melted. Eskers range in length from less than

a kilometer to more than 160 kilometers and in height from 3 to 30 meters.

Excess lime (in tables). Excess carbonates in the soil restrict the growth of some

plants.

Fertility, soil. The quality that enables a soil to provide plant nutrients, in adequate

amounts and in proper balance, for the growth of specified plants when light,

moisture, temperature, tilth, and other growth factors are favorable.

Fibric soil material (peat). The least decomposed of all organic soil material. Peat

contains a large amount of well preserved fiber that is readily identifiable

according to botanical origin. Peat has the lowest bulk density and the highest

water content at saturation of all organic soil material.

Field moisture capacity. The moisture content of a soil, expressed as a percentage

of the ovendry weight, after the gravitational, or free, water has drained away; the

field moisture content 2 or 3 days after a soaking rain; also called normal field

capacity, normal moisture capacity, or capillary capacity.

Fine textured soil. Sandy clay, silty clay, or clay.

First bottom. An obsolete, informal term loosely applied to the lowest flood-plain

steps that are subject to regular flooding.

Flood plain. The nearly level plain that borders a stream and is subject to flooding

unless protected artificially.

Flood-plain landforms. A variety of constructional and erosional features produced

by stream channel migration and flooding. Examples include backswamps, floodplain splays, meanders, meander belts, meander scrolls, oxbow lakes, and natural

levees.

Flood-plain splay. A fan-shaped deposit or other outspread deposit formed where an

overloaded stream breaks through a levee (natural or artificial) and deposits its

material (commonly coarse grained) on the flood plain.
148 Soil Survey of

Flood-plain step. An essentially flat, terrace-like alluvial surface within a valley that is

frequently covered by floodwater from the present stream; any approximately

horizontal surface still actively modified by fluvial scour and/or deposition. May

occur individually or as a series of steps.

Fluvial. Of or pertaining to rivers or streams; produced by stream or river action.

Footslope. The concave surface at the base of a hillslope. A footslope is a transition

zone between upslope sites of erosion and transport (shoulders and backslopes)

and downslope sites of deposition (toeslopes).

Forb. Any herbaceous plant not a grass or a sedge.

Forest cover. All trees and other woody plants (underbrush) covering the ground in a

forest.

Forest type. A stand of trees similar in composition and development because of

given physical and biological factors by which it may be differentiated from other

stands.

Frost action (in tables). Freezing and thawing of soil moisture. Frost action can

damage roads, buildings and other structures, and plant roots.

Genesis, soil. The mode of origin of the soil. Refers especially to the processes or

soil-forming factors responsible for the formation of the solum, or true soil, from

the unconsolidated parent material.

Geomorphology. The science that treats the general configuration of the earth’s

surface; specifically the study of the classification, description, nature, origin, and

development of landforms and their relationships to underlying structures, and the

history of geologic changes as recorded by these surface features. The term is

especially applied to the genetic interpretation of landforms.

Glaciofluvial deposits. Material moved by glaciers and subsequently sorted and

deposited by streams flowing from the melting ice. The deposits are stratified and

occur in the form of outwash plains, valley trains, deltas, kames, eskers, and kame

terraces.

Glaciolacustrine deposits. Material ranging from fine clay to sand derived from

glaciers and deposited in glacial lakes mainly by glacial meltwater. Many deposits

are bedded or laminated.

Gleyed soil. Soil that formed under poor drainage, resulting in the reduction of iron

and other elements in the profile and in gray colors.

Grassed waterway. A natural or constructed waterway, typically broad and shallow,

seeded to grass as protection against erosion. Conducts surface water away from

cropland.

Gravel. Rounded or angular fragments of rock as much as 3 inches (2 millimeters to

7.6 centimeters) in diameter. An individual piece is a pebble.

Gravelly soil material. Material that has 15 to 35 percent, by volume, rounded or

angular rock fragments, not prominently flattened, as much as 3 inches (7.6

centimeters) in diameter.

Green manure crop (agronomy). A soil-improving crop grown to be plowed under in

an early stage of maturity or soon after maturity.

Ground water. Water filling all the unblocked pores of the material below the water

table.

Gully. A small channel with steep sides caused by erosion and cut in unconsolidated

materials by concentrated but intermittent flow of water. The distinction between a

gully and a rill is one of depth. A gully generally is an obstacle to farm machinery

and is too deep to be obliterated by ordinary tillage; a rill is of lesser depth and can

be smoothed over by ordinary tillage.

Hard to reclaim (in tables). Reclamation is difficult after the removal of soil for

construction and other uses. Revegetation and erosion control are extremely

difficult.
Knox County, Illinois 149

Hemic soil material (mucky peat). Organic soil material intermediate in degree of

decomposition between the less decomposed fibric material and the more

decomposed sapric material.

Herbaceous peat. An accumulation of organic material, decomposed to some degree,

which is predominantly the remains of sedges, reeds, cattails, and other

herbaceous plants.

High-chroma zones. Zones having chroma of 3 or more. Typical color in areas of iron

concentrations.

High-residue crops. Such crops as small grain and corn used for grain. If properly

managed, residue from these crops can be used to control erosion until the next

crop in the rotation is established. These crops return large amounts of organic

matter to the soil.

Horizon, soil. A layer of soil, approximately parallel to the surface, having distinct

characteristics produced by soil-forming processes. In the identification of soil

horizons, an uppercase letter represents the major horizons. Numbers or

lowercase letters that follow represent subdivisions of the major horizons. An

explanation of the subdivisions is given in the “Soil Survey Manual.” The major

horizons of mineral soil are as follows:

O horizon.—An organic layer of fresh and decaying plant residue.

L horizon.—A layer of organic and mineral limnic materials, including coprogenous

earth (sedimentary peat), diatomaceous earth, and marl.

A horizon.—The mineral horizon at or near the surface in which an accumulation

of humified organic matter is mixed with the mineral material. Also, a plowed

surface horizon, most of which was originally part of a B horizon.

E horizon.—The mineral horizon in which the main feature is loss of silicate clay,

iron, aluminum, or some combination of these.

B horizon.—The mineral horizon below an A horizon. The B horizon is in part a

layer of transition from the overlying A to the underlying C horizon. The B horizon

also has distinctive characteristics, such as (1) accumulation of clay, sesquioxides,

humus, or a combination of these; (2) prismatic or blocky structure; (3) redder or

browner colors than those in the A horizon; or (4) a combination of these.

C horizon.—The mineral horizon or layer, excluding indurated bedrock, that is little

affected by soil-forming processes and does not have the properties typical of the

overlying soil material. The material of a C horizon may be either like or unlike that

in which the solum formed. If the material is known to differ from that in the solum,

an Arabic numeral, commonly a 2, precedes the letter C.

Cr horizon.—Soft, consolidated bedrock beneath the soil.

R layer.—Consolidated bedrock beneath the soil. The bedrock commonly

underlies a C horizon, but it can be directly below an A or a B horizon.

Humus. The well decomposed, more or less stable part of the organic matter in

mineral soils.

Hydrologic soil groups. Refers to soils grouped according to their runoff potential.

The soil properties that influence this potential are those that affect the minimum

rate of water infiltration on a bare soil during periods after prolonged wetting when

the soil is not frozen. These properties are depth to a seasonal high water table,

the infiltration rate and permeability after prolonged wetting, and depth to a very

slowly permeable layer. The slope and the kind of plant cover are not considered

but are separate factors in predicting runoff.

Igneous rock. Rock that was formed by cooling and solidification of magma and

that has not been changed appreciably by weathering since its formation.

Major varieties include plutonic and volcanic rock (e.g., andesite, basalt, and

granite).
150 Soil Survey of

Illuviation. The movement of soil material from one horizon to another in the soil

profile. Generally, material is removed from an upper horizon and deposited in a

lower horizon.

Impervious soil. A soil through which water, air, or roots penetrate slowly or not at all.

No soil is absolutely impervious to air and water all the time.

Infiltration. The downward entry of water into the immediate surface of soil or other

material, as contrasted with percolation, which is movement of water through soil

layers or material.

Infiltration capacity. The maximum rate at which water can infiltrate into a soil under

a given set of conditions.

Infiltration rate. The rate at which water penetrates the surface of the soil at any given

instant, usually expressed in inches per hour. The rate can be limited by the

infiltration capacity of the soil or the rate at which water is applied at the surface.

Intake rate. The average rate of water entering the soil under irrigation. Most soils

have a fast initial rate; the rate decreases with application time. Therefore, intake

rate for design purposes is not a constant but is a variable depending on the net

irrigation application. The rate of water intake, in inches per hour, is expressed as

follows:

Less than 0.2 ................................................. very low

0.2 to 0.4 ................................................................ low

0.4 to 0.75 ........................................... moderately low

0.75 to 1.25 .................................................. moderate

1.25 to 1.75 ....................................... moderately high

1.75 to 2.5 ............................................................. high

More than 2.5 ............................................... very high

Interfluve. A landform composed of the relatively undissected upland or ridge

between two adjacent valleys containing streams flowing in the same general

direction. An elevated area between two drainageways that sheds water to those

drainageways.

Interfluve (geomorphology). A geomorphic component of hills consisting of the

uppermost, comparatively level or gently sloping area of a hill; shoulders of

backwearing hillslopes can narrow the upland or can merge, resulting in a strongly

convex shape.

Intermittent stream. A stream, or reach of a stream, that does not flow year-round but

that is commonly dry for 3 or more months out of 12 and whose channel is

generally below the local water table. It flows only during wet periods or when it

receives ground-water discharge or long, continued contributions from melting

snow or other surface and shallow subsurface sources.

Iron depletions. See Redoximorphic features.

Irrigation. Application of water to soils to assist in production of crops. Methods of

irrigation include:

Drip (or trickle).—Water is applied slowly and under low pressure to the surface of

the soil or into the soil through such applicators as emitters, porous tubing, or

perforated pipe.

Sprinkler.—Water is sprayed over the soil surface through pipes or nozzles from a

pressure system.

Kame. A low mound, knob, hummock, or short irregular ridge composed of stratified

sand and gravel deposited by a subglacial stream as a fan or delta at the margin

of a melting glacier; by a supraglacial stream in a low place or hole on the surface

of the glacier; or as a ponded deposit on the surface or at the margin of stagnant

ice.
Knox County, Illinois 151

Knoll. A small, low, rounded hill rising above adjacent landforms.

Ksat. Saturated hydraulic conductivity. (See Permeability.)

Lacustrine deposit. Material deposited in lake water and exposed when the water

level is lowered or the elevation of the land is raised.

Lake bed. The bottom of a lake; a lake basin.

Lake plain. A nearly level surface marking the floor of an extinct lake filled by well

sorted, generally fine textured, stratified deposits, commonly containing varves.

Lake terrace. A narrow shelf, partly cut and partly built, produced along a lakeshore in

front of a scarp line of low cliffs and later exposed when the water level falls.

Lakeshore. A narrow strip of land in contact with or bordering a lake; especially the

beach of a lake.

Lamella. A thin (commonly less than 1 cm thick), discontinuous or continuous,

generally horizontal layer of fine material (especially clay and iron oxides) that has

been pedogenically concentrated (illuviated within a coarser textured eluviated

layer several centimeters to several decimeters thick).

Landslide. A general, encompassing term for most types of mass movement

landforms and processes involving the downslope transport and outward

deposition of soil and rock materials caused by gravitational forces; the movement

may or may not involve saturated materials. The speed and distance of movement,

as well as the amount of soil and rock material, vary greatly.

Large stones (in tables). Rock fragments 3 inches (7.6 centimeters) or more across.

Large stones adversely affect the specified use of the soil.

Leaching. The removal of soluble material from soil or other material by percolating

water.

Linear extensibility. Refers to the change in length of an unconfined clod as moisture

content is decreased from a moist to a dry state. Linear extensibility is used to

determine the shrink-swell potential of soils. It is an expression of the volume

change between the water content of the clod at 1

/3- or 1/10-bar tension (33kPa or

10kPa tension) and oven dryness. Volume change is influenced by the amount and

type of clay minerals in the soil. The volume change is the percent change for the

whole soil. If it is expressed as a fraction, the resulting value is COLE, coefficient

of linear extensibility.

Liquid limit. The moisture content at which the soil passes from a plastic to a liquid

state.

Loam. Soil material that is 7 to 27 percent clay particles, 28 to 50 percent silt particles,

and less than 52 percent sand particles.

Loess. Material transported and deposited by wind and consisting dominantly of siltsized particles.

Low strength. The soil is not strong enough to support loads.

Low-chroma zones. Zones having chroma of 2 or less. Typical color in areas of iron

depletions.

Low-residue crops. Such crops as corn used for silage, peas, beans, and potatoes.

Residue from these crops is not adequate to control erosion until the next crop in

the rotation is established. These crops return little organic matter to the soil.

MAP. Mean annual precipitation, expressed in inches.

Marl. An earthy, unconsolidated deposit consisting chiefly of calcium carbonate mixed

with clay in approximately equal proportions; formed primarily under freshwater

lacustrine conditions but also formed in more saline environments.

Mass movement. A generic term for the dislodgment and downslope transport of soil

and rock material as a unit under direct gravitational stress.

Masses. See Redoximorphic features.
152 Soil Survey of

Mechanical treatment. Use of mechanical equipment for seeding, brush management,

and other management practices.

Medium textured soil. Very fine sandy loam, loam, silt loam, or silt.

Metamorphic rock. Rock of any origin altered in mineralogical composition, chemical

composition, or structure by heat, pressure, and movement at depth in the earth’s

crust. Nearly all such rocks are crystalline.

Mineral soil. Soil that is mainly mineral material and low in organic material. Its bulk

density is more than that of organic soil.

Minimum tillage. Only the tillage essential to crop production and prevention of soil

damage.

Miscellaneous area. A kind of map unit that has little or no natural soil and supports

little or no vegetation.

MLRA (major land resource area). A geographic area characterized by a particular

pattern of land uses, elevation and topography, soils, climate, water resources,

and potential natural vegetation.

Moderately coarse textured soil. Coarse sandy loam, sandy loam, or fine sandy

loam.

Moderately fine textured soil. Clay loam, sandy clay loam, or silty clay loam.

Mollic epipedon. A thick, dark, humus-rich surface horizon (or horizons) that has high

base saturation and pedogenic soil structure. It may include the upper part of the

subsoil.

Moraine. In terms of glacial geology, a mound, ridge, or other topographically distinct

accumulation of unsorted, unstratified drift, predominantly till, deposited primarily

by the direct action of glacial ice in a variety of landforms. Also, a general term for

a landform composed mainly of till (except for kame moraines, which are

composed mainly of stratified outwash) that has been deposited by a glacier.

Some types of moraines are disintegration, end, ground, kame, lateral,

recessional, and terminal.

Morphology, soil. The physical makeup of the soil, including the texture, structure,

porosity, consistence, color, and other physical, mineral, and biological properties

of the various horizons, and the thickness and arrangement of those horizons in

the soil profile.

Mottling, soil. Irregular spots of different colors that vary in number and size.

Descriptive terms are as follows: abundance—few, common, and many; size—fine,

medium, and coarse; and contrast—faint, distinct, and prominent. The size

measurements are of the diameter along the greatest dimension. Fine indicates

less than 5 millimeters (about 0.2 inch); medium, from 5 to 15 millimeters (about

0.2 to 0.6 inch); and coarse, more than 15 millimeters (about 0.6 inch).

Muck. Dark, finely divided, well decomposed organic soil material. (See Sapric soil

material.)

Mucky peat. Unconsolidated soil material consisting primarily of organic matter that is

in an intermediate stage of decomposition such that a significant part of the

material can be recognized and a significant part of the material can not be

recognized.

Munsell notation. A designation of color by degrees of three simple variables—hue,

value, and chroma. For example, a notation of 10YR 6/4 is a color with hue of

10YR, value of 6, and chroma of 4.

Neutral soil. A soil having a pH value of 6.6 to 7.3. (See Reaction, soil.)

Nodules. See Redoximorphic features.

Nutrient, plant. Any element taken in by a plant essential to its growth. Plant nutrients

are mainly nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron,

manganese, copper, boron, and zinc obtained from the soil and carbon, hydrogen,

and oxygen obtained from the air and water.
Knox County, Illinois 153

Organic matter. Plant and animal residue in the soil in various stages of

decomposition. The content of organic matter in the surface layer is described as

follows:

Very low .................................... less than 0.5 percent

Low .................................................. 0.5 to 1.0 percent

Moderately low ............................... 1.0 to 2.0 percent

Moderate ......................................... 2.0 to 4.0 percent

High ................................................. 4.0 to 8.0 percent

Very high ................................. more than 8.0 percent

Outwash. Stratified and sorted sediments (chiefly sand and gravel) removed or

“washed out” from a glacier by meltwater streams and deposited in front of or

beyond the end moraine or the margin of a glacier. The coarser material is

deposited nearer to the ice.

Outwash plain. An extensive lowland area of coarse textured glaciofluvial material. An

outwash plain is commonly smooth; where pitted, it generally is low in relief.

Parent material. The unconsolidated organic and mineral material in which soil forms.

Parts per million (ppm). The concentration of a substance in the soil, such as

phosphorus or potassium, in one million parts of air-dried soil on a weight per

weight basis.

Peat. Unconsolidated material, largely undecomposed organic matter, that has

accumulated under excess moisture. (See Fibric soil material.)

Ped. An individual natural soil aggregate, such as a granule, a prism, or a block.

Pedon. The smallest volume that can be called “a soil.” A pedon is three dimensional

and large enough to permit study of all horizons. Its area ranges from about 10 to

100 square feet (1 square meter to 10 square meters), depending on the variability

of the soil.

Percolation. The movement of water through the soil.

Permeability. The quality of the soil that enables water or air to move downward

through the profile. The rate at which a saturated soil transmits water is accepted

as a measure of this quality. In soil physics, the rate is referred to as “saturated

hydraulic conductivity,” which is defined in the “Soil Survey Manual.” In line with

conventional usage in the engineering profession and with traditional usage in

published soil surveys, this rate of flow continues to be expressed as

“permeability.” Terms describing permeability, measured in inches per hour, are as

follows:

Impermeable .............................less than 0.0015 inch

Very slow ..................................... 0.0015 to 0.06 inch

Slow ................................................... 0.06 to 0.2 inch

Moderately slow ................................... 0.2 to 0.6 inch

Moderate .................................. 0.6 inch to 2.0 inches

Moderately rapid .............................. 2.0 to 6.0 inches

Rapid ................................................. 6.0 to 20 inches

Very rapid ................................... more than 20 inches

pH value. A numerical designation of acidity and alkalinity in soil. (See Reaction, soil.)

Phase, soil. A subdivision of a soil series based on features that affect its use and

management, such as slope, stoniness, and flooding.

Piping (in tables). Formation of subsurface tunnels or pipelike cavities by water

moving through the soil.

Plastic limit. The moisture content at which a soil changes from semisolid to plastic.

Plasticity index. The numerical difference between the liquid limit and the plastic limit;

the range of moisture content within which the soil remains plastic.
154 Soil Survey of

Plowpan. A compacted layer formed in the soil directly below the plowed layer.

Ponding. Standing water on soils in closed depressions. Unless the soils are

artificially drained, the water can be removed only by percolation or

evapotranspiration.

Poorly graded. Refers to a coarse grained soil or soil material consisting mainly of

particles of nearly the same size. Because there is little difference in size of the

particles, density can be increased only slightly by compaction.

Pore linings. See Redoximorphic features.

Potential native plant community. See Climax plant community.

Potential rooting depth (effective rooting depth). Depth to which roots could

penetrate if the content of moisture in the soil were adequate. The soil has no

properties restricting the penetration of roots to this depth.

Prescribed burning. Deliberately burning an area for specific management purposes,

under the appropriate conditions of weather and soil moisture and at the proper

time of day.

Productivity, soil. The capability of a soil for producing a specified plant or sequence

of plants under specific management.

Profile, soil. A vertical section of the soil extending through all its horizons and into

the parent material.

Proper grazing use. Grazing at an intensity that maintains enough cover to protect

the soil and maintain or improve the quantity and quality of the desirable

vegetation. This practice increases the vigor and reproduction capacity of the key

plants and promotes the accumulation of litter and mulch necessary to conserve

soil and water.

Reaction, soil. A measure of acidity or alkalinity of a soil, expressed as pH values. A

soil that tests to pH 7.0 is described as precisely neutral in reaction because it is

neither acid nor alkaline. The degrees of acidity or alkalinity, expressed as pH

values, are:

Ultra acid ................................................. less than 3.5

Extremely acid ............................................. 3.5 to 4.4

Very strongly acid ........................................ 4.5 to 5.0

Strongly acid ................................................ 5.1 to 5.5

Moderately acid ........................................... 5.6 to 6.0

Slightly acid ................................................. 6.1 to 6.5

Neutral ......................................................... 6.6 to 7.3

Slightly alkaline ........................................... 7.4 to 7.8

Moderately alkaline ..................................... 7.9 to 8.4

Strongly alkaline .......................................... 8.5 to 9.0

Very strongly alkaline .......................... 9.1 and higher

Redoximorphic concentrations. See Redoximorphic features.

Redoximorphic depletions. See Redoximorphic features.

Redoximorphic features. Redoximorphic features are associated with wetness and

result from alternating periods of reduction and oxidation of iron and manganese

compounds in the soil. Reduction occurs during saturation with water, and

oxidation occurs when the soil is not saturated. Characteristic color patterns are

created by these processes. The reduced iron and manganese ions may be

removed from a soil if vertical or lateral fluxes of water occur, in which case there

is no iron or manganese precipitation in that soil. Wherever the iron and

manganese are oxidized and precipitated, they form either soft masses or hard

concretions or nodules. Movement of iron and manganese as a result of

redoximorphic processes in a soil may result in redoximorphic features that are

defined as follows:
Knox County, Illinois 155

1. Redoximorphic concentrations.—These are zones of apparent accumulation of

iron-manganese oxides, including:

A. Nodules and concretions, which are cemented bodies that can be removed

from the soil intact. Concretions are distinguished from nodules on the basis of

internal organization. A concretion typically has concentric layers that are

visible to the naked eye. Nodules do not have visible organized internal

structure; and

B. Masses, which are noncemented concentrations of substances within the

soil matrix; and

C. Pore linings, i.e., zones of accumulation along pores that may be either

coatings on pore surfaces or impregnations from the matrix adjacent to the

pores.

2. Redoximorphic depletions.—These are zones of low chroma (chromas less

than those in the matrix) where either iron-manganese oxides alone or both

iron-manganese oxides and clay have been stripped out, including:

A. Iron depletions, i.e., zones that contain low amounts of iron and

manganese oxides but have a clay content similar to that of the adjacent matrix;

and

B. Clay depletions, i.e., zones that contain low amounts of iron, manganese,

and clay (often referred to as silt coatings or skeletans).

3. Reduced matrix.—This is a soil matrix that has low chroma in situ but

undergoes a change in hue or chroma within 30 minutes after the soil material

has been exposed to air.

Reduced matrix. See Redoximorphic features.

Regolith. All unconsolidated earth materials above the solid bedrock. It includes

material weathered in place from all kinds of bedrock and alluvial, glacial, eolian,

lacustrine, and pyroclastic deposits.

Relief. The relative difference in elevation between the upland summits and the

lowlands or valleys of a given region.

Residuum (residual soil material). Unconsolidated, weathered or partly weathered

mineral material that accumulated as bedrock disintegrated in place.

Rill. A very small, steep-sided channel resulting from erosion and cut in

unconsolidated materials by concentrated but intermittent flow of water. A rill

generally is not an obstacle to wheeled vehicles and is shallow enough to be

smoothed over by ordinary tillage.

Rise. A slight increase in elevation of the land surface, typically with a broad summit

and gently sloping sides.

Road cut. A sloping surface produced by mechanical means during road construction.

It is commonly on the uphill side of the road.

Rock fragments. Rock or mineral fragments having a diameter of 2 millimeters or

more; for example, pebbles, cobbles, stones, and boulders.

Root zone. The part of the soil that can be penetrated by plant roots.

Runoff. The precipitation discharged into stream channels from an area. The water

that flows off the surface of the land without sinking into the soil is called surface

runoff. Water that enters the soil before reaching surface streams is called groundwater runoff or seepage flow from ground water.

Sand. As a soil separate, individual rock or mineral fragments from 0.05 millimeter to

2.0 millimeters in diameter. Most sand grains consist of quartz. As a soil textural

class, a soil that is 85 percent or more sand and not more than 10 percent clay.

Sapric soil material (muck). The most highly decomposed of all organic soil material.

Muck has the least amount of plant fiber, the highest bulk density, and the lowest

water content at saturation of all organic soil material.

Saturated hydraulic conductivity (Ksat). See Permeability.
156 Soil Survey of

Saturation. Wetness characterized by zero or positive pressure of the soil water. Under

conditions of saturation, the water will flow from the soil matrix into an unlined

auger hole.

Second bottom. The first terrace above the normal flood plain (or first bottom) of a

river.

Sedimentary rock. A consolidated deposit of clastic particles, chemical precipitates,

or organic remains accumulated at or near the surface of the earth under normal

low temperature and pressure conditions. Sedimentary rocks include consolidated

equivalents of alluvium, colluvium, drift, and eolian, lacustrine, and marine

deposits. Examples are sandstone, siltstone, mudstone, claystone, shale,

conglomerate, limestone, dolomite, and coal.

Sequum. A sequence consisting of an illuvial horizon and the overlying eluvial horizon.

(See Eluviation.)

Series, soil. A group of soils that have profiles that are almost alike, except for

differences in texture of the surface layer. All the soils of a series have horizons

that are similar in composition, thickness, and arrangement.

Shale. Sedimentary rock that formed by the hardening of a deposit of clay, silty clay, or

silty clay loam and that has a tendency to split into thin layers.

Sheet erosion. The removal of a fairly uniform layer of soil material from the land

surface by the action of rainfall and surface runoff.

Shoulder. The convex, erosional surface near the top of a hillslope. A shoulder is a

transition from summit to backslope.

Shrink-swell (in tables). The shrinking of soil when dry and the swelling when wet.

Shrinking and swelling can damage roads, dams, building foundations, and other

structures. It can also damage plant roots.

Side slope (geomorphology). A geomorphic component of hills consisting of a laterally

planar area of a hillside. The overland waterflow is predominantly parallel. Side

slopes are dominantly colluvium and slope-wash sediments.

Silt. As a soil separate, individual mineral particles that range in diameter from the

upper limit of clay (0.002 millimeter) to the lower limit of very fine sand (0.05

millimeter). As a soil textural class, soil that is 80 percent or more silt and less than

12 percent clay.

Similar soils. Soils that share limits of diagnostic criteria, behave and perform in a

similar manner, and have similar conservation needs or management

requirements for the major land uses in the survey area.

Site index. A designation of the quality of a forest site based on the height of the

dominant stand at an arbitrarily chosen age. For example, if the average height

attained by dominant and codominant trees in a fully stocked stand at the age of

50 years is 75 feet, the site index is 75.

Slickensides (pedogenic). Grooved, striated, and/or glossy (shiny) slip faces on

structural peds, such as wedges; produced by shrink-swell processes, most

commonly in soils that have a high content of expansive clays.

Slope. The inclination of the land surface from the horizontal. Percentage of slope is

the vertical distance divided by horizontal distance, then multiplied by 100. Thus, a

slope of 20 percent is a drop of 20 feet in 100 feet of horizontal distance.

Slope alluvium. Sediment gradually transported down the slopes of mountains or hills

primarily by nonchannel alluvial processes (i.e., slope-wash processes) and

characterized by particle sorting. Lateral particle sorting is evident on long slopes.

In a profile sequence, sediments may be distinguished by differences in size

and/or specific gravity of rock fragments and may be separated by stone lines.

Burnished peds and sorting of rounded or subrounded pebbles or cobbles

distinguish these materials from unsorted colluvial deposits.

Slow refill (in tables). The slow filling of ponds, resulting from restricted permeability in

the soil.
Knox County, Illinois 157

Soil. A natural, three-dimensional body at the earth’s surface. It is capable of

supporting plants and has properties resulting from the integrated effect of climate

and living matter acting on earthy parent material, as conditioned by relief and by

the passage of time.

Soil separates. Mineral particles less than 2 millimeters in equivalent diameter and

ranging between specified size limits. The names and sizes, in millimeters, of

separates recognized in the United States are as follows:

Very coarse sand ........................................ 2.0 to 1.0

Coarse sand ................................................ 1.0 to 0.5

Medium sand ............................................. 0.5 to 0.25

Fine sand ................................................. 0.25 to 0.10

Very fine sand .......................................... 0.10 to 0.05

Silt .......................................................... 0.05 to 0.002

Clay .....................................................less than 0.002

Solum. The upper part of a soil profile, above the C horizon, in which the processes of

soil formation are active. The solum in soil consists of the A, E, and B horizons.

Generally, the characteristics of the material in these horizons are unlike those of

the material below the solum. The living roots and plant and animal activities are

largely confined to the solum.

Stones. Rock fragments 10 to 24 inches (25 to 60 centimeters) in diameter if rounded

or 15 to 24 inches (38 to 60 centimeters) in length if flat.

Stream channel. The hollow bed where a natural stream of surface water flows or

may flow; the deepest or central part of the bed, formed by the main current and

covered more or less continuously by water.

Stream terrace. One of a series of platforms in a stream valley, flanking and more or

less parallel to the stream channel, originally formed near the level of the stream;

represents the remnants of an abandoned flood plain, stream bed, or valley floor

produced during a former state of fluvial erosion or deposition.

Stripcropping. Growing crops in a systematic arrangement of strips or bands that

provide vegetative barriers to wind erosion and water erosion.

Structure, soil. The arrangement of primary soil particles into compound particles or

aggregates. The principal forms of soil structure are—platy (laminated), prismatic

(vertical axis of aggregates longer than horizontal), columnar (prisms with rounded

tops), blocky (angular or subangular), and granular. Structureless soils are either

single grain (each grain by itself, as in dune sand) or massive (the particles

adhering without any regular cleavage, as in many hardpans).

Stubble mulch. Stubble or other crop residue left on the soil or partly worked into the

soil. It protects the soil from wind erosion and water erosion after harvest, during

preparation of a seedbed for the next crop, and during the early growing period of

the new crop.

Subsidence. The potential decrease in surface elevation as a result of the drainage of

wet soils that have organic layers or semifluid, mineral layers. Subsidence, as a

result of drainage, is attributed to (1) shrinkage from drying, (2) consolidation

because of the loss of ground-water buoyancy, (3) compaction from tillage or

manipulation, (4) wind erosion, (5) burning, and (6) biochemical oxidation.

Subsoil. Technically, the B horizon; roughly, the part of the solum below plow depth.

Subsoiling. Tilling a soil below normal plow depth, ordinarily to shatter a hardpan or

claypan.

Substratum. The part of the soil below the solum.

Subsurface layer. Any surface soil horizon (A, E, AB, or EB) below the surface layer.

Summit. The topographically highest position of a hillslope. It has a nearly level

(planar or only slightly convex) surface.
158 Soil Survey of

Surface layer. The soil ordinarily moved in tillage, or its equivalent in uncultivated soil,

ranging in depth from 4 to 10 inches (10 to 25 centimeters). Frequently designated

as the “plow layer,” or the “Ap horizon.”

Surface soil. The A, E, AB, and EB horizons, considered collectively. It includes all

subdivisions of these horizons.

Swale. A slight depression in the midst of generally level land. A shallow depression in

an undulating ground moraine due to uneven glacial deposition.

Taxadjuncts. Soils that cannot be classified in a series recognized in the classification

system. Such soils are named for a series they strongly resemble and are

designated as taxadjuncts to that series because they differ in ways too small to

be of consequence in interpreting their use and behavior. Soils are recognized as

taxadjuncts only when one or more of their characteristics are slightly outside the

range defined for the family of the series for which the soils are named.

Terminal moraine. An end moraine that marks the farthest advance of a glacier. It

typically has the form of a massive arcuate or concentric ridge, or complex of

ridges, and is underlain by till and other types of drift.

Terrace (conservation). An embankment, or ridge, constructed across sloping soils on

the contour or at a slight angle to the contour. The terrace intercepts surface runoff

so that water soaks into the soil or flows slowly to a prepared outlet. A terrace in a

field generally is built so that the field can be farmed. A terrace intended mainly for

drainage has a deep channel that is maintained in permanent sod.

Terrace (geomorphology). A steplike surface, bordering a valley floor or shoreline, that

represents the former position of a flood plain, lake, or seashore. The term is

usually applied both to the relatively flat summit surface (tread) that was cut or

built by stream or wave action and to the steeper descending slope (scarp or riser)

that has graded to a lower base level of erosion.

Texture, soil. The relative proportions of sand, silt, and clay particles in a mass of soil.

The basic textural classes, in order of increasing proportion of fine particles, are

sand, loamy sand, sandy loam, loam, silt loam, silt, sandy clay loam, clay loam,

silty clay loam, sandy clay, silty clay, and clay. The sand, loamy sand, and sandy

loam classes may be further divided by specifying “coarse,” “fine,” or “very fine.”

Thin layer (in tables). Otherwise suitable soil material that is too thin for the specified

use.

Till. Dominantly unsorted and nonstratified drift, generally unconsolidated and

deposited directly by a glacier without subsequent reworking by meltwater, and

consisting of a heterogeneous mixture of clay, silt, sand, gravel, stones, and

boulders; rock fragments of various lithologies are embedded within a finer matrix

that can range from clay to sandy loam.

Till plain. An extensive area of level to gently undulating soils underlain predominantly

by till and bounded at the distal end by subordinate recessional or end moraines.

Tilth, soil. The physical condition of the soil as related to tillage, seedbed preparation,

seedling emergence, and root penetration.

Toeslope. The gently inclined surface at the base of a hillslope. Toeslopes in profile

are commonly gentle and linear and are constructional surfaces forming the lower

part of a hillslope continuum that grades to valley or closed-depression floors.

Topsoil. The upper part of the soil, which is the most favorable material for plant

growth. It is ordinarily rich in organic matter and is used to topdress roadbanks,

lawns, and land affected by mining.

Trace elements. Chemical elements, for example, zinc, cobalt, manganese, copper,

and iron, in soils in extremely small amounts. They are essential to plant growth.

Upland. An informal, general term for the higher ground of a region, in contrast with a

low-lying adjacent area, such as a valley or plain, or for land at a higher elevation

than the flood plain or low stream terrace; land above the footslope zone of the

hillslope continuum.
Knox County, Illinois 159

Weathering. All physical disintegration, chemical decomposition, and biologically

induced changes in rocks or other deposits at or near the earth’s surface by

atmospheric or biologic agents or by circulating surface waters but involving

essentially no transport of the altered material.

Well graded. Refers to soil material consisting of coarse grained particles that are well

distributed over a wide range in size or diameter. Such soil normally can be easily

increased in density and bearing properties by compaction. Contrasts with poorly

graded soil.

Wilting point (or permanent wilting point). The moisture content of soil, on an

ovendry basis, at which a plant (specifically a sunflower) wilts so much that it does

not recover when placed in a humid, dark chamber.

Windthrow. The uprooting and tipping over of trees by the wind.

161

Tables
162 Soil Survey of

Table 1.--Temperature and Precipitation

(Recorded in the period 1971-2000 at Galesburg, Illinois)

_______________________________________________________________________________________________________________

 | |

 | Temperature | Precipitation

 | | __________________________________________________________________________________________________

 | | | | 2 years in | | |2 years in 10| |

 | | | | 10 will have-- | | | will have-- | | _______________________ _____________

 Month |Average|Average|Average| | | Average |Average| | | Average |Average

 | daily | daily | | Maximum | Minimum |number of| | Less | More |number of|snowfall

 |maximum|minimum| |temperature|temperature| growing | |than--|than--|days with|

 | | | | higher | lower | degree | | | |0.10 inch|

 | | | | than-- | than-- | days* | | | | or more | _______________________________________________________________________________________________________________

 | oF | oF | oF | oF | oF | Units | In | In | In | | In

 | | | | | | | | | | |

 January----| 29.5 | 13.4 | 21.5 | 57 | -17 | 0 | 1.41 | 0.59| 2.11| 3 | 8.3

 | | | | | | | | | | |

 February---| 35.5 | 19.2 | 27.3 | 65 | -13 | 1 | 1.55 | .62| 2.33| 3 | 5.2

 | | | | | | | | | | |

 March------| 48.0 | 29.4 | 38.7 | 79 | 4 | 30 | 2.84 | 1.25| 4.20| 6 | 2.8

 | | | | | | | | | | |

 April------| 61.1 | 40.2 | 50.7 | 85 | 18 | 126 | 3.81 | 2.18| 5.26| 6 | 1.5

 | | | | | | | | | | |

 May--------| 72.3 | 51.4 | 61.9 | 90 | 33 | 371 | 3.97 | 2.10| 5.62| 7 | .0

 | | | | | | | | | | |

 June-------| 81.4 | 60.9 | 71.1 | 95 | 45 | 636 | 4.18 | 2.01| 6.06| 6 | .0

 | | | | | | | | | | |

 July-------| 84.8 | 65.3 | 75.0 | 98 | 51 | 779 | 4.37 | 2.13| 6.32| 6 | .0

 | | | | | | | | | | |

 August-----| 82.4 | 63.2 | 72.8 | 96 | 48 | 705 | 4.07 | 1.93| 5.92| 6 | .0

 | | | | | | | | | | |

 September--| 75.5 | 54.7 | 65.1 | 93 | 35 | 453 | 3.50 | 1.81| 4.98| 5 | .0

 | | | | | | | | | | |

 October----| 63.6 | 43.0 | 53.3 | 85 | 24 | 169 | 2.53 | 1.38| 3.54| 5 | .1

 | | | | | | | | | | |

 November---| 47.5 | 30.7 | 39.1 | 73 | 8 | 26 | 2.72 | 1.18| 4.03| 5 | 1.8

 | | | | | | | | | | |

 December---| 34.1 | 19.2 | 26.6 | 62 | -10 | 2 | 2.29 | 1.16| 3.28| 4 | 5.8

 | | | | | | | | | | |

 Yearly: | | | | | | | | | | |

 | | | | | | | | | | |

 Average---| 59.6 | 40.9 | 50.3 | --- | --- | --- | --- | ---| ---| --- | ---

 | | | | | | | | | | |

 Extreme---| 102 | -25 | --- | 98 | -19 | --- | --- | ---| ---| --- | ---

 | | | | | | | | | | |

 Total-----| --- | --- | --- | --- | --- | 3,299 | 37.25 | 31.16| 42.92| 62 | 25.5

 | | | | | | | | | | | _______________________________________________________________________________________________________________

 * A growing degree day is a unit of heat available for plant growth. It can be calculated by adding the

maximum and minimum daily temperatures, dividing the sum by 2, and subtracting the temperature below which

growth is minimal for the principal crops in the area (50 degrees F).
Knox County, Illinois 163

Table 2.--Freeze Dates in Spring and Fall

(Recorded in the period 1971-2000 at Galesburg, Illinois)

_____________________________________________________________

 |

 | Temperature

 |__________________________________________

 Probability | | |

 | 24 oF | 28 oF | 32 oF

 | or lower | or lower | or lower _____________________________________________________________

 | | |

 | | |

Last freezing | | |

 temperature | | |

 in spring: | | |

 | | |

 1 year in 10 | | |

 later than-- | Apr. 13 | Apr. 18 | Apr. 29

 | | |

 2 years in 10 | | |

 later than-- | Apr. 9 | Apr. 15 | Apr. 25

 | | |

 5 years in 10 | | |

 later than-- | Apr. 2 | Apr. 8 | Apr. 15

 | | |

First freezing | | |

 temperature | | |

 in fall: | | |

 | | |

 1 year in 10 | | |

 earlier than-- | Oct. 23 | Oct. 9 | Sept. 28

 | | |

 2 years in 10 | | |

 earlier than-- | Oct. 27 | Oct. 15 | Oct. 3

 | | |

 5 years in 10 | | |

 earlier than-- | Nov. 5 | Oct. 26 | Oct. 12

 | | | _____________________________________________________________

Table 3.--Growing Season

(Recorded in the period 1971-2000 at Galesburg,

 Illinois)

__________________________________________________

 |

 | Daily minimum temperature

 | during growing season

 |___________________________________

 Probability | | |

 | Higher | Higher | Higher

 | than | than | than

 | 24 oF | 28 oF | 32 o __________________________________________________ F

 | Days | Days | Days

 | | |

9 years in 10 | 202 | 182 | 160

 | | |

8 years in 10 | 206 | 188 | 167

 | | |

5 years in 10 | 216 | 200 | 180

 | | |

2 years in 10 | 225 | 211 | 193

 | | |

1 year in 10 | 230 | 217 | 200

 | | | __________________________________________________
164 Soil Survey of

Table 4.--Classification of the Soils

(An asterisk in the first column indicates a taxadjunct to the series. See text for a description of

 those characteristics that are outside the range of the series)

______________________________________________________________________________________________________

 |

 Soil name | Family or higher taxonomic class ______________________________________________________________________________________________________

 |

 Alvin--------------------|Coarse-loamy, mixed, superactive, mesic Typic Hapludalfs

*Assumption---------------|Fine-silty, mixed, superactive, mesic Mollic Oxyaquic Hapludalfs

 Atlas--------------------|Fine, smectitic, mesic Aeric Chromic Vertic Epiaqualfs

 Camden-------------------|Fine-silty, mixed, superactive, mesic Typic Hapludalfs

 Clarksdale---------------|Fine, smectitic, mesic Udollic Endoaqualfs

 Coatsburg----------------|Fine, smectitic, mesic Vertic Argiaquolls

 Denny--------------------|Fine, smectitic, mesic Mollic Albaqualfs

 Dorchester---------------|Fine-silty, mixed, superactive, calcareous, mesic Typic Udifluvents

 Edinburg-----------------|Fine, smectitic, mesic Vertic Argiaquolls

 Elco---------------------|Fine-silty, mixed, superactive, mesic Oxyaquic Hapludalfs

 Elkhart------------------|Fine-silty, mixed, superactive, mesic Typic Argiudolls

*Elkhart------------------|Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

 Fayette------------------|Fine-silty, mixed, superactive, mesic Typic Hapludalfs

 Greenbush----------------|Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

 Harvard------------------|Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

 Hickory------------------|Fine-loamy, mixed, active, mesic Typic Hapludalfs

 Huntsville---------------|Fine-silty, mixed, superactive, mesic Cumulic Hapludolls

 Ipava--------------------|Fine, smectitic, mesic Aquic Argiudolls

 Keomah-------------------|Fine, smectitic, mesic Aeric Endoaqualfs

 Lawson-------------------|Fine-silty, mixed, superactive, mesic Aquic Cumulic Hapludolls

 Lenzburg-----------------|Fine-loamy, mixed, active, calcareous, mesic Haplic Udarents

 Littleton----------------|Fine-silty, mixed, superactive, mesic Aquic Cumulic Hapludolls

 Marseilles---------------|Fine-silty, mixed, active, mesic Typic Hapludalfs

 Orion--------------------|Coarse-silty, mixed, superactive, nonacid, mesic Aquic Udifluvents

 Orthents, loamy----------|Fine-loamy, mixed, active, nonacid, mesic Typic Udorthents

 Orthents, silty----------|Fine-silty, mixed, nonacid, mesic Aquic Udorthents

 Osco---------------------|Fine-silty, mixed, superactive, mesic Typic Argiudolls

*Osco---------------------|Fine-silty, mixed, superactive, mesic Mollic Hapludalfs

 Radford------------------|Fine-silty, mixed, superactive, mesic Fluvaquentic Hapludolls

 Rapatee------------------|Fine-silty, mixed, superactive, nonacid, mesic Mollic Udarents

 Rozetta------------------|Fine-silty, mixed, superactive, mesic Typic Hapludalfs

 Sable--------------------|Fine-silty, mixed, superactive, mesic Typic Endoaquolls

 Sawmill------------------|Fine-silty, mixed, superactive, mesic Cumulic Endoaquolls

 Sylvan-------------------|Fine-silty, mixed, superactive, mesic Typic Hapludalfs

 Virgil-------------------|Fine-silty, mixed, superactive, mesic Udollic Endoaqualfs

 | ______________________________________________________________________________________________________
Knox County, Illinois 165

Table 5.--Acreage and Proportionate Extent of the Soils

______________________________________________________________________________________________________________________

 | | |

 Map | Soil name | Acres |Percent

symbol | | | ______________________________________________________________________________________________________________________

 | | |

7D3 |Atlas silty clay loam, 10 to 18 percent slopes, severely eroded-------------------------| 1,455 | 0.3

8D2 |Hickory silt loam, 10 to 18 percent slopes, eroded--------------------------------------| 9,668 | 2.1

8F |Hickory silt loam, 18 to 35 percent slopes----------------------------------------------| 138 | *

8F2 |Hickory silt loam, 18 to 35 percent slopes, eroded--------------------------------------| 20,106 | 4.4

8G |Hickory silt loam, 35 to 60 percent slopes----------------------------------------------| 7,077 | 1.5

17A |Keomah silt loam, 0 to 2 percent slopes-------------------------------------------------| 5,171 | 1.1

19C3 |Sylvan silty clay loam, 5 to 10 percent slopes, severely eroded-------------------------| 2,225 | 0.5

19D3 |Sylvan silty clay loam, 10 to 18 percent slopes, severely eroded------------------------| 694 | 0.2

43A |Ipava silt loam, 0 to 2 percent slopes--------------------------------------------------| 75,107 | 16.3

45A |Denny silt loam, 0 to 2 percent slopes--------------------------------------------------| 758 | 0.2

68A |Sable silty clay loam, 0 to 2 percent slopes--------------------------------------------| 15,566 | 3.4

86B |Osco silt loam, 2 to 5 percent slopes---------------------------------------------------| 65,220 | 14.1

86B2 |Osco silt loam, 2 to 5 percent slopes, eroded-------------------------------------------| 19,462 | 4.2

86C |Osco silt loam, 5 to 10 percent slopes--------------------------------------------------| 864 | 0.2

86C2 |Osco silt loam, 5 to 10 percent slopes, eroded------------------------------------------| 25,736 | 5.6

86D2 |Osco silt loam, 10 to 18 percent slopes, eroded-----------------------------------------| 535 | 0.1

119D2 |Elco silt loam, 10 to 18 percent slopes, eroded-----------------------------------------| 9,356 | 2.0

119E2 |Elco silt loam, 18 to 25 percent slopes, eroded-----------------------------------------| 4,710 | 1.0

131B |Alvin sandy loam, 2 to 5 percent slopes-------------------------------------------------| 292 | *

131D |Alvin sandy loam, 10 to 18 percent slopes-----------------------------------------------| 251 | *

131F |Alvin sandy loam, 18 to 35 percent slopes-----------------------------------------------| 441 | *

134B |Camden silt loam, 2 to 5 percent slopes-------------------------------------------------| 403 | *

134C2 |Camden silt loam, 5 to 10 percent slopes, eroded----------------------------------------| 524 | 0.1

134D2 |Camden silt loam, 10 to 18 percent slopes, eroded---------------------------------------| 403 | *

249A |Edinburg silty clay loam, 0 to 2 percent slopes-----------------------------------------| 199 | *

257A |Clarksdale silt loam, 0 to 2 percent slopes---------------------------------------------| 12,079 | 2.6

259C2 |Assumption silt loam, 5 to 10 percent slopes, eroded------------------------------------| 4,117 | 0.9

259D2 |Assumption silt loam, 10 to 18 percent slopes, eroded-----------------------------------| 2,970 | 0.6

259D3 |Assumption silty clay loam, 10 to 18 percent slopes, severely eroded--------------------| 990 | 0.2

279B |Rozetta silt loam, 2 to 5 percent slopes------------------------------------------------| 22,964 | 5.0

279C2 |Rozetta silt loam, 5 to 10 percent slopes, eroded---------------------------------------| 29,160 | 6.3

280B |Fayette silt loam, 2 to 5 percent slopes------------------------------------------------| 4,049 | 0.9

280C2 |Fayette silt loam, 5 to 10 percent slopes, eroded---------------------------------------| 5,344 | 1.2

280D2 |Fayette silt loam, 10 to 18 percent slopes, eroded--------------------------------------| 3,656 | 0.8

280F |Fayette silt loam, 18 to 35 percent slopes----------------------------------------------| 356 | *

344B |Harvard silt loam, 2 to 5 percent slopes------------------------------------------------| 394 | *

536 |Dumps, mine-----------------------------------------------------------------------------| 485 | 0.1

549D2 |Marseilles silt loam, 10 to 18 percent slopes, eroded-----------------------------------| 802 | 0.2

549F |Marseilles silt loam, 18 to 35 percent slopes-------------------------------------------| 5,731 | 1.2

549G |Marseilles silt loam, 35 to 60 percent slopes-------------------------------------------| 6,865 | 1.5

567B2 |Elkhart silt loam, 2 to 5 percent slopes, eroded----------------------------------------| 442 | *

567C2 |Elkhart silt loam, 5 to 10 percent slopes, eroded---------------------------------------| 6,232 | 1.3

567D2 |Elkhart silt loam, 10 to 18 percent slopes, eroded--------------------------------------| 4 | *

567D3 |Elkhart silty clay loam, 10 to 18 percent slopes, severely eroded-----------------------| 852 | 0.2

660C2 |Coatsburg silty clay loam, 5 to 10 percent slopes, eroded-------------------------------| 369 | *

675B |Greenbush silt loam, 2 to 5 percent slopes----------------------------------------------| 12,762 | 2.8

801B |Orthents, silty, undulating-------------------------------------------------------------| 3,177 | 0.7

802B |Orthents, loamy, undulating-------------------------------------------------------------| 224 | *

835G |Earthen dams----------------------------------------------------------------------------| 17 | *

863 |Pits, clay------------------------------------------------------------------------------| 97 | *

864 |Pits, quarries--------------------------------------------------------------------------| 71 | *

865 |Pits, gravel----------------------------------------------------------------------------| 113 | *

871B |Lenzburg silty clay loam, 1 to 7 percent slopes-----------------------------------------| 5,320 | 1.2

871D |Lenzburg silty clay loam, 7 to 20 percent slopes----------------------------------------| 4,341 | 0.9

871G |Lenzburg silty clay loam, 20 to 60 percent slopes---------------------------------------| 8,856 | 1.9

872B |Rapatee silty clay loam, 2 to 5 percent slopes------------------------------------------| 1,391 | 0.3

901B |Ipava-Osco silt loams, 2 to 5 percent slopes--------------------------------------------| 1,402 | 0.3

902A |Ipava-Sable complex, 0 to 2 percent slopes----------------------------------------------| 2,540 | 0.6

3074A |Radford silt loam, 0 to 2 percent slopes, frequently flooded----------------------------| 4,753 | 1.0

 | | |

 See footnote at end of table.
166 Soil Survey of

Table 5.--Acreage and Proportionate Extent of the Soils--Continued

______________________________________________________________________________________________________________________

 | | |

 Map | Soil name | Acres |Percent

symbol | | | ______________________________________________________________________________________________________________________

 | | |

3107+ |Sawmill silt loam, 0 to 2 percent slopes, frequently flooded, overwash------------------| 6,349 | 1.4

3415A |Orion silt loam, 0 to 2 percent slopes, frequently flooded------------------------------| 2,364 | 0.5

3451A |Lawson silt loam, 0 to 2 percent slopes, frequently flooded-----------------------------| 16,022 | 3.5

7081B |Littleton silt loam, 1 to 3 percent slopes, rarely flooded------------------------------| 1,512 | 0.3

7104A |Virgil silt loam, 0 to 2 percent slopes, rarely flooded---------------------------------| 308 | *

8077A |Huntsville silt loam, 0 to 2 percent slopes, occasionally flooded-----------------------| 5,350 | 1.2

8239A |Dorchester silt loam, 0 to 2 percent slopes, occasionally flooded-----------------------| 2,874 | 0.6

9017A |Keomah silt loam, terrace, 0 to 2 percent slopes----------------------------------------| 120 | *

9086B |Osco silt loam, terrace, 2 to 5 percent slopes------------------------------------------| 147 | *

9257A |Clarksdale silt loam, terrace, 0 to 2 percent slopes------------------------------------| 411 | *

9279B |Rozetta silt loam, terrace, 2 to 5 percent slopes---------------------------------------| 500 | 0.1

9279C2 |Rozetta silt loam, terrace, 5 to 10 percent slopes, eroded------------------------------| 267 | *

9280B |Fayette silt loam, terrace, 2 to 5 percent slopes---------------------------------------| 399 | *

9280C2 |Fayette silt loam, terrace, 5 to 10 percent slopes, eroded------------------------------| 184 | *

9675B |Greenbush silt loam, terrace, 2 to 5 percent slopes-------------------------------------| 603 | 0.1

M-W |Miscellaneous water---------------------------------------------------------------------| 63 | *

W |Water-----------------------------------------------------------------------------------| 4,916 | 1.1

 | |____________|________

 | Total------------------------------------------------------------------------------| 461,675 | 100.0

 | | | ______________________________________________________________________________________________________________________

 * Less than 0.1 percent.
Knox County, Illinois 167

Table 6.--Land Capability and Yields per Acre of Crops and Pasture

(Crop yields are those that can be expected under an optimum level of management. They are for nonirrigated

 areas. Yields were taken from bulletins published in 2000 by the University of Illinois, College of

 Agricultural, Consumer and Environmental Sciences. Yields for crops and hay were taken from Bulletin 811,

 and yields for pasture were taken from Bulletin 810. Absence of a yield indicates that the soil is not

 suited to the crop or the crop generally is not grown on the soil)

______________________________________________________________________________________________________________

 | | | | | | |

 Map symbol | Land | Corn | Soybeans |Winter wheat| Oats |Grass-legume|Grass-legume

 and soil name |capability| | | | | hay | pasture ______________________________________________________________________________________________________________

 | | Bu | Bu | Bu | Bu | Tons | AUM*

 | | | | | | |

7D3: | | | | | | |

 Atlas---------------| 6e | --- | --- | --- | --- | 2.12 | 3.5

 | | | | | | |

8D2: | | | | | | |

 Hickory-------------| 3e | 94 | 32 | 38 | 44 | 3.13 | 4.5

 | | | | | | |

8F: | | | | | | |

 Hickory-------------| 6e | --- | --- | --- | --- | 2.79 | 4.0

 | | | | | | |

8F2: | | | | | | |

 Hickory-------------| 6e | --- | --- | --- | --- | 2.61 | 3.6

 | | | | | | |

8G: | | | | | | |

 Hickory-------------| 7e | --- | --- | --- | --- | --- | ---

 | | | | | | |

17A: | | | | | | |

 Keomah--------------| 2w | 145 | 46 | 59 | 75 | 4.63 | 6.8

 | | | | | | |

19C3: | | | | | | |

 Sylvan--------------| 4e | 117 | 38 | 46 | 54 | 3.11 | 4.4

 | | | | | | |

19D3: | | | | | | |

 Sylvan--------------| 4e | 107 | 35 | 43 | 50 | 2.86 | 4.0

 | | | | | | |

43A: | | | | | | |

 Ipava---------------| 1 | 172 | 56 | 69 | 90 | 5.31 | 7.8

 | | | | | | |

45A: | | | | | | |

 Denny---------------| 3w | 143 | 47 | 58 | 69 | 4.41 | 6.5

 | | | | | | |

68A: | | | | | | |

 Sable---------------| 2w | 173 | 57 | 67 | 89 | 5.20 | 7.7

 | | | | | | |

86B: | | | | | | |

 Osco----------------| 2e | 170 | 54 | 67 | 91 | 6.16 | 9.0

 | | | | | | |

86B2: | | | | | | |

 Osco----------------| 2e | 156 | 51 | 65 | 87 | 5.91 | 8.6

 | | | | | | |

86C: | | | | | | |

 Osco----------------| 3e | 165 | 52 | 65 | 88 | 5.97 | 8.7

 | | | | | | |

86C2: | | | | | | |

 Osco----------------| 3e | 160 | 50 | 63 | 86 | 5.78 | 8.3

 | | | | | | |

86D2: | | | | | | |

 Osco----------------| 3e | 149 | 47 | 59 | 80 | 5.38 | 7.7

 | | | | | | |

119D2: | | | | | | |

 Elco----------------| 3e | 118 | 39 | 46 | 59 | 3.32 | 4.8

 | | | | | | |

 See footnote at end of table.
168 Soil Survey of

Table 6.--Land Capability and Yields per Acre of Crops and Pasture--Continued

______________________________________________________________________________________________________________

 | | | | | | |

 Map symbol | Land | Corn | Soybeans |Winter wheat| Oats |Grass-legume|Grass-legume

 and soil name |capability| | | | | hay | pasture ______________________________________________________________________________________________________________

 | | Bu | Bu | Bu | Bu | Tons | AUM*

 | | | | | | |

119E2: | | | | | | |

 Elco----------------| 6e | --- | --- | --- | --- | 2.96 | 4.3

 | | | | | | |

131B: | | | | | | |

 Alvin---------------| 2e | 134 | 44 | 52 | 66 | 3.36 | 4.9

 | | | | | | |

131D: | | | | | | |

 Alvin---------------| 3e | 123 | 40 | 48 | 61 | 3.08 | 4.5

 | | | | | | |

131F: | | | | | | |

 Alvin---------------| 6e | --- | --- | --- | --- | 2.61 | 3.8

 | | | | | | |

134B: | | | | | | |

 Camden--------------| 2e | 148 | 46 | 57 | 77 | 4.25 | 6.2

 | | | | | | |

134C2: | | | | | | |

 Camden--------------| 3e | 139 | 43 | 54 | 73 | 3.99 | 5.8

 | | | | | | |

134D2: | | | | | | |

 Camden--------------| 3e | 129 | 40 | 50 | 67 | 3.71 | 5.3

 | | | | | | |

249A: | | | | | | |

 Edinburg------------| 3w | 155 | 50 | 61 | 77 | 4.52 | 6.7

 | | | | | | |

257A: | | | | | | |

 Clarksdale----------| 1 | 157 | 50 | 62 | 80 | 4.75 | 7.0

 | | | | | | |

259C2: | | | | | | |

 Assumption----------| 3e | 137 | 44 | 55 | 70 | 3.99 | 5.8

 | | | | | | |

259D2: | | | | | | |

 Assumption----------| 4e | 127 | 41 | 51 | 65 | 3.71 | 5.3

 | | | | | | |

259D3: | | | | | | |

 Assumption----------| 4e | 116 | 37 | 47 | 59 | 3.39 | 4.8

 | | | | | | |

279B: | | | | | | |

 Rozetta-------------| 2e | 146 | 46 | 58 | 75 | 4.70 | 6.9

 | | | | | | |

279C2: | | | | | | |

 Rozetta-------------| 3e | 138 | 43 | 55 | 71 | 4.42 | 6.4

 | | | | | | |

280B: | | | | | | |

 Fayette-------------| 2e | 149 | 47 | 59 | 76 | 4.70 | 6.9

 | | | | | | |

280C2: | | | | | | |

 Fayette-------------| 3e | 140 | 44 | 56 | 72 | 4.42 | 6.4

 | | | | | | |

280D2: | | | | | | |

 Fayette-------------| 3e | 130 | 41 | 52 | 67 | 4.11 | 5.8

 | | | | | | |

280F: | | | | | | |

 Fayette-------------| 6e | --- | --- | --- | --- | 3.66 | 5.3

 | | | | | | |

344B: | | | | | | |

 Harvard-------------| 2e | 152 | 48 | 59 | 78 | 4.92 | 7.2

 | | | | | | |

536. | | | | | | |

 Dumps | | | | | | |

 | | | | | | |

549D2: | | | | | | |

 Marseilles----------| 4e | 106 | 35 | 43 | 56 | 2.69 | 4.1

 | | | | | | |

 See footnote at end of table.
Knox County, Illinois 169

Table 6.--Land Capability and Yields per Acre of Crops and Pasture--Continued

______________________________________________________________________________________________________________

 | | | | | | |

 Map symbol | Land | Corn | Soybeans |Winter wheat| Oats |Grass-legume|Grass-legume

 and soil name |capability| | | | | hay | pasture ______________________________________________________________________________________________________________

 | | Bu | Bu | Bu | Bu | Tons | AUM*

 | | | | | | |

549F: | | | | | | |

 Marseilles----------| 7e | --- | --- | --- | --- | --- | 3.6

 | | | | | | |

549G: | | | | | | |

 Marseilles----------| 7e | --- | --- | --- | --- | --- | ---

 | | | | | | |

567B2: | | | | | | |

 Elkhart-------------| 2e | 146 | 47 | 56 | 69 | 4.51 | 6.6

 | | | | | | |

567C2: | | | | | | |

 Elkhart-------------| 3e | 143 | 46 | 55 | 68 | 4.42 | 6.4

 | | | | | | |

567D2: | | | | | | |

 Elkhart-------------| 3e | 133 | 42 | 51 | 63 | 4.11 | 5.9

 | | | | | | |

567D3: | | | | | | |

 Elkhart-------------| 4e | 122 | 39 | 47 | 58 | 3.75 | 5.3

 | | | | | | |

660C2: | | | | | | |

 Coatsburg-----------| 3e | 104 | 35 | 41 | 50 | 3.15 | 4.7

 | | | | | | |

675B: | | | | | | |

 Greenbush-----------| 2e | 164 | 52 | 62 | 86 | 4.81 | 7.2

 | | | | | | |

801B: | | | | | | |

 Orthents------------| 2e | --- | --- | --- | --- | --- | ---

 | | | | | | |

802B: | | | | | | |

 Orthents------------| 2e | --- | --- | --- | --- | --- | ---

 | | | | | | |

835G. | | | | | | |

 Earthen dams | | | | | | |

 | | | | | | |

863, 864, 865. | | | | | | |

 Pits | | | | | | |

 | | | | | | |

871B: | | | | | | |

 Lenzburg------------| 2e | 107 | 36 | 41 | 44 | 3.58 | 5.2

 | | | | | | |

871D: | | | | | | |

 Lenzburg------------| 6e | --- | --- | --- | --- | 3.29 | 4.8

 | | | | | | |

871G: | | | | | | |

 Lenzburg------------| 7e | --- | --- | --- | --- | --- | ---

 | | | | | | |

872B: | | | | | | |

 Rapatee-------------| 2e | 131 | 45 | 52 | 61 | 3.25 | 4.7

 | | | | | | |

901B: | | | | | | |

 Ipava---------------| 1 | 170 | 55 | 68 | 89 | 5.26 | 7.7

 | | | | | | |

 Osco----------------| 2e | 170 | 53 | 67 | 91 | 6.16 | 9.0

 | | | | | | |

902A: | | | | | | |

 Ipava---------------| 1 | 172 | 56 | 69 | 90 | 5.31 | 7.8

 | | | | | | |

 Sable---------------| 2w | 173 | 57 | 67 | 89 | 5.20 | 7.7

 | | | | | | |

3074A: | | | | | | |

 Radford-------------| 3w | 150 | 48 | --- | --- | 4.47 | 6.6

 | | | | | | |

 See footnote at end of table.
170 Soil Survey of

Table 6.--Land Capability and Yields per Acre of Crops and Pasture--Continued

______________________________________________________________________________________________________________

 | | | | | | |

 Map symbol | Land | Corn | Soybeans |Winter wheat| Oats |Grass-legume|Grass-legume

 and soil name |capability| | | | | hay | pasture ______________________________________________________________________________________________________________

 | | Bu | Bu | Bu | Bu | Tons | AUM*

 | | | | | | |

3107+: | | | | | | |

 Sawmill-------------| 3w | 163 | 49 | --- | --- | 4.70 | 6.9

 | | | | | | |

3415A: | | | | | | |

 Orion---------------| 3w | 146 | 46 | --- | --- | 4.07 | 6.0

 | | | | | | |

3451A: | | | | | | |

 Lawson--------------| 3w | 154 | 50 | --- | --- | 4.68 | 6.9

 | | | | | | |

7081B: | | | | | | |

 Littleton-----------| 1 | 173 | 54 | 66 | 89 | 5.37 | 7.8

 | | | | | | |

7104A: | | | | | | |

 Virgil--------------| 1 | 164 | 63 | 87 | 50 | 4.97 | 7.3

 | | | | | | |

8077A: | | | | | | |

 Huntsville----------| 1 | 174 | 55 | 67 | 90 | 6.78 | 10.0

 | | | | | | |

8239A: | | | | | | |

 Dorchester----------| 2w | 161 | 47 | 58 | 79 | 5.09 | 7.5

 | | | | | | |

9017A: | | | | | | |

 Keomah--------------| 2w | 145 | 46 | 59 | 75 | 4.63 | 6.8

 | | | | | | |

9086B: | | | | | | |

 Osco----------------| 2e | 170 | 53 | 67 | 91 | 6.16 | 9.0

 | | | | | | |

9257A: | | | | | | |

 Clarksdale----------| 1 | 157 | 50 | 62 | 80 | 4.75 | 7.0

 | | | | | | |

9279B: | | | | | | |

 Rozetta-------------| 2e | 146 | 46 | 58 | 75 | 4.70 | 6.9

 | | | | | | |

9279C2: | | | | | | |

 Rozetta-------------| 3e | 138 | 43 | 55 | 71 | 4.42 | 6.5

 | | | | | | |

9280B: | | | | | | |

 Fayette-------------| 2e | 149 | 47 | 59 | 76 | 4.70 | 6.9

 | | | | | | |

9280C2: | | | | | | |

 Fayette-------------| 3e | 140 | 44 | 56 | 72 | 4.42 | 6.4

 | | | | | | |

9675B: | | | | | | |

 Greenbush-----------| 2e | 164 | 51 | 62 | 86 | 4.81 | 7.0

 | | | | | | |

M-W. | | | | | | |

 Miscellaneous water | | | | | | |

 | | | | | | |

W. | | | | | | |

 Water | | | | | | |

 | | | | | | | ______________________________________________________________________________________________________________

 * Animal unit month: The amount of forage or feed required to feed one animal unit (one cow, one horse,

one mule, five sheep, or five goats) for 30 days.
Knox County, Illinois 171

Table 7.--Prime Farmland

(Only the soils considered prime farmland are listed. Urban or built-up areas of the soils listed are

 not considered prime farmland. If a soil is prime farmland only under certain conditions, the

 conditions are specified in parentheses after the soil name)

_______________________________________________________________________________________________________

 |

 Map | Soil name

symbol | _______________________________________________________________________________________________________

 |

17A |Keomah silt loam, 0 to 2 percent slopes (where drained)

43A |Ipava silt loam, 0 to 2 percent slopes

45A |Denny silt loam, 0 to 2 percent slopes (where drained)

68A |Sable silty clay loam, 0 to 2 percent slopes (where drained)

86B |Osco silt loam, 2 to 5 percent slopes

86B2 |Osco silt loam, 2 to 5 percent slopes, eroded

131B |Alvin sandy loam, 2 to 5 percent slopes

134B |Camden silt loam, 2 to 5 percent slopes

249A |Edinburg silty clay loam, 0 to 2 percent slopes (where drained)

257A |Clarksdale silt loam, 0 to 2 percent slopes (where drained)

279B |Rozetta silt loam, 2 to 5 percent slopes

280B |Fayette silt loam, 2 to 5 percent slopes

344B |Harvard silt loam, 2 to 5 percent slopes

567B2 |Elkhart silt loam, 2 to 5 percent slopes, eroded

675B |Greenbush silt loam, 2 to 5 percent slopes

871B |Lenzburg silty clay loam, 1 to 7 percent slopes

872B |Rapatee silty clay loam, 2 to 5 percent slopes

3074A |Radford silt loam, 0 to 2 percent slopes, frequently flooded (where protected from flooding

 | or not frequently flooded during the growing season)

3107+ |Sawmill silt loam, 0 to 2 percent slopes, frequently flooded, overwash (where drained and

 | either protected from flooding or not frequently flooded during the growing season)

3415A |Orion silt loam, 0 to 2 percent slopes, frequently flooded (where protected from flooding

 | or not frequently flooded during the growing season)

3451A |Lawson silt loam, 0 to 2 percent slopes, frequently flooded (where protected from flooding

 | or not frequently flooded during the growing season)

7081B |Littleton silt loam, 1 to 3 percent slopes, rarely flooded

7104A |Virgil silt loam, 0 to 2 percent slopes, rarely flooded (where drained)

8077A |Huntsville silt loam, 0 to 2 percent slopes, occasionally flooded

8239A |Dorchester silt loam, 0 to 2 percent slopes, occasionally flooded

9017A |Keomah silt loam, terrace, 0 to 2 percent slopes (where drained)

9086B |Osco silt loam, terrace, 2 to 5 percent slopes

9257A |Clarksdale silt loam, terrace, 0 to 2 percent slopes (where drained)

9279B |Rozetta silt loam, terrace, 2 to 5 percent slopes

9280B |Fayette silt loam, terrace, 2 to 5 percent slopes

9675B |Greenbush silt loam, terrace, 2 to 5 percent slopes

 | _______________________________________________________________________________________________________
172 Soil Survey of

Table 8.--Hydric Soils

(Only the map units that include hydric components are

 listed. See text for a description of hydric

 properties)

_____________________________________________________________

 | | |

 Map symbol and | Component | Hydric |Local landform

 map unit name | | status | _____________________________________________________________

 | | |

17A: | | |

 Keomah silt loam, 0 to|Keomah | No |ground moraine

 2 percent slopes |Denny | Yes |depression

 | | |

43A: | | |

 Ipava silt loam, 0 to |Ipava | No |ground moraine

 2 percent slopes |Denny | Yes |depression

 |Sable | Yes |depression

 | | |

45A: | | |

 Denny silt loam, 0 to |Denny | Yes |depression

 2 percent slopes |Sable | Yes |depression

 | | |

68A: | | |

 Sable silty clay loam,|Sable | Yes |ground moraine

 0 to 2 percent slopes| | |

 | | |

86B: | | |

 Osco silt loam, 2 to 5|Osco | No |ground moraine

 percent slopes |Denny | Yes |depression

 | | |

86B2: | | |

 Osco silt loam, 2 to 5|Osco | No |ground moraine

 percent slopes, |Denny | Yes |depression

 eroded | | |

 | | |

249A: | | |

 Edinburg silty clay |Edinburg | Yes |depression

 loam, 0 to 2 percent | | |

 slopes | | |

 | | |

257A: | | |

 Clarksdale silt loam, |Clarksdale | No |ground moraine

 0 to 2 percent slopes|Denny | Yes |depression

 | | |

259C2: | | |

 Assumption silt loam, |Assumption | No |ground moraine

 5 to 10 percent |Coatsburg | Yes |ground moraine

 slopes, eroded | | |

 | | |

259D2: | | |

 Assumption silt loam, |Assumption | No |ground moraine

 10 to 18 percent |Coatsburg | Yes |ground moraine

 slopes, eroded | | |

 | | |

259D3: | | |

 Assumption silty clay |Assumption | No |ground moraine

 loam, 10 to 18 |Coatsburg | Yes |ground moraine

 percent slopes, | | |

 severely eroded | | |

 | | |

279B: | | |

 Rozetta silt loam, 2 |Rozetta | No |ground moraine

 to 5 percent slopes |Denny | Yes |depression

 | | |

660C2: | | |

 Coatsburg silty clay |Coatsburg | Yes |ground moraine

 loam, 5 to 10 percent| | |

 slopes, eroded | | |

 | | |
Knox County, Illinois 173

Table 8.--Hydric Soils--Continued

_____________________________________________________________

 | | |

 Map symbol and | Component | Hydric |Local landform

 map unit name | | status | _____________________________________________________________

 | | |

675B: | | |

 Greenbush silt loam, 2|Greenbush | No |ground moraine

 to 5 percent slopes |Denny | Yes |depression

 | | |

801B: | | |

 Orthents, silty, |Orthents | No |ground moraine

 undulating |Sable | Yes |depression

 | | |

902A: | | |

 Ipava-Sable complex, 0|Ipava | No |ground moraine

 to 2 percent slopes |Sable | Yes |depression

 | | |

3074A: | | |

 Radford silt loam, 0 |Radford | No |flood plain

 to 2 percent slopes, |Sawmill | Yes |flood plain

 frequently flooded | | |

 | | |

3107+: | | |

 Sawmill silt loam, 0 |Sawmill | Yes |flood plain

 to 2 percent slopes, | | |

 frequently flooded, | | |

 overwash | | |

 | | |

3415A: | | |

 Orion silt loam, 0 to |Orion | No |flood plain

 2 percent slopes, |Sawmill | Yes |flood plain

 frequently flooded | | |

 | | |

3451A: | | |

 Lawson silt loam, 0 to|Lawson | No |flood plain

 2 percent slopes, |Sawmill | Yes |flood plain

 frequently flooded | | |

 | | |

7081B: | | |

 Littleton silt loam, 1|Littleton | No |alluvial fan,

 to 3 percent slopes, | | |stream terrace

 rarely flooded |Sawmill | Yes |flood plain

 | | |

8239A: | | |

 Dorchester silt loam, |Dorchester | No |flood plain

 0 to 2 percent |Sawmill | Yes |flood plain

 slopes, occasionally | | |

 flooded | | |

 | | |

9017A: | | |

 Keomah silt loam, |Keomah | No |stream terrace

 terrace, 0 to 2 |Denny | Yes |depression

 percent slopes | | |

 | | |

9257A: | | |

 Clarksdale silt loam, |Clarksdale | No |stream terrace

 terrace, 0 to 2 |Denny | Yes |depression

 percent slopes | | |

 | | | _____________________________________________________________
174 Soil Survey of

Table 9.--Forestland Productivity

(Only the soils commonly used for the production of commercial trees are listed)

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

7D3: | | | |

 Atlas------------------------|Bur oak-----------------------| 70 | 57 |Common hackberry, eastern

 |Green ash---------------------| --- | --- | cottonwood, green ash, pin

 |Northern red oak--------------| 70 | 57 | oak, river birch, swamp

 |White oak---------------------| 70 | 57 | white oak, sweetgum.

 | | | |

8D2: | | | |

 Hickory----------------------|Bitternut hickory-------------| --- | --- |Black walnut, eastern

 |Black oak---------------------| --- | --- | cottonwood, eastern white

 |Green ash---------------------| --- | --- | pine, green ash, northern

 |Northern red oak--------------| 85 | 72 | red oak, pecan, pin oak,

 |Tuliptree---------------------| 95 | 100 | tuliptree, white oak.

 |White oak---------------------| 85 | 72 |

 | | | |

8F: | | | |

 Hickory----------------------|Bitternut hickory-------------| --- | --- |Eastern cottonwood, eastern

 |Black oak---------------------| --- | --- | white pine, green ash,

 |Green ash---------------------| --- | --- | northern red oak, pecan,

 |Northern red oak--------------| 85 | 72 | pin oak, tuliptree, white

 |Tuliptree---------------------| 95 | 100 | oak.

 |White oak---------------------| 85 | 72 |

 | | | |

8F2: | | | |

 Hickory----------------------|Bitternut hickory-------------| --- | --- |Eastern cottonwood, eastern

 |Black oak---------------------| --- | --- | white pine, green ash,

 |Green ash---------------------| --- | --- | northern red oak, pecan,

 |Northern red oak--------------| 85 | 72 | pin oak, tuliptree, white

 |Tuliptree---------------------| 95 | 100 | oak.

 |White oak---------------------| 85 | 72 |

 | | | |

8G: | | | |

 Hickory----------------------|Bitternut hickory-------------| --- | --- |Eastern cottonwood, eastern

 |Black oak---------------------| --- | --- | white pine, green ash,

 |Green ash---------------------| --- | --- | northern red oak, pecan,

 |Northern red oak--------------| 85 | 72 | pin oak, tuliptree, white

 |Tuliptree---------------------| 95 | 100 | oak.

 |White oak---------------------| 85 | 72 |

 | | | |

17A: | | | |

 Keomah-----------------------|Northern red oak--------------| 70 | 57 |Common hackberry, common

 |White oak---------------------| 65 | 43 | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

19C3: | | | |

 Sylvan-----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

19D3: | | | |

 Sylvan-----------------------|Northern red oak--------------| 80 | 57 |Black walnut, eastern

 |White oak---------------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |Black walnut------------------| --- | --- | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
Knox County, Illinois 175

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

43A: | | | |

 Ipava------------------------|------------------------------| --- | --- |Common hackberry, common

 | | | | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

45A: | | | |

 Denny------------------------|------------------------------| --- | --- |Common hackberry, eastern

 | | | | cottonwood, green ash, pin

 | | | | oak, river birch, swamp

 | | | | white oak, sweetgum.

 | | | |

68A: | | | |

 Sable------------------------|------------------------------| --- | --- |Common hackberry, eastern

 | | | | cottonwood, green ash, pin

 | | | | oak, river birch, swamp

 | | | | white oak, sweetgum.

 | | | |

86B: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

86B2: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

86C: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

86C2: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

86D2: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

119D2: | | | |

 Elco-------------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 85 | 72 | cottonwood, eastern white

 |White oak---------------------| 85 | 72 | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
176 Soil Survey of

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

119E2: | | | |

 Elco-------------------------|Black walnut------------------| --- | --- |Eastern cottonwood, eastern

 |Northern red oak--------------| 85 | 72 | white pine, green ash,

 |White oak---------------------| 85 | 72 | northern red oak, pecan, pin

 | | | | oak, tuliptree, white oak.

 | | | |

131B: | | | |

 Alvin------------------------|Black walnut------------------| --- | --- |Black walnut, bur oak,

 |Northern red oak--------------| 80 | 57 | eastern white pine, pecan,

 |Tuliptree---------------------| 90 | 86 | pin oak, tuliptree.

 |White oak---------------------| 80 | 57 |

 | | | |

131D: | | | |

 Alvin------------------------|Black walnut------------------| --- | --- |Black walnut, bur oak,

 |Northern red oak--------------| 80 | 57 | eastern white pine, pecan,

 |Tuliptree---------------------| 90 | 86 | pin oak, tuliptree.

 |White oak---------------------| 80 | 57 |

 | | | |

131F: | | | |

 Alvin------------------------|Black walnut------------------| --- | --- |Bur oak, eastern white pine,

 |Northern red oak--------------| 80 | 57 | pecan, pin oak, tuliptree.

 |Tuliptree---------------------| 90 | 86 |

 |White oak---------------------| 80 | 57 |

 | | | |

134B: | | | |

 Camden-----------------------|Green ash---------------------| 76 | 72 |Black walnut, eastern

 |Northern red oak--------------| 85 | 72 | cottonwood, eastern white

 |Sweetgum----------------------| 80 | 86 | pine, green ash, northern

 |Tuliptree---------------------| 95 | 100 | red oak, pecan, pin oak,

 |White oak---------------------| 85 | 72 | tuliptree, white oak.

 | | | |

134C2: | | | |

 Camden-----------------------|Northern red oak--------------| 85 | 72 |Black walnut, eastern

 |White oak---------------------| 85 | 72 | cottonwood, eastern white

 |Green ash---------------------| 76 | 72 | pine, green ash, northern

 |Sweetgum----------------------| 80 | 86 | red oak, pecan, pin oak,

 |Tuliptree---------------------| 95 | 100 | tuliptree, white oak.

 | | | |

134D2: | | | |

 Camden-----------------------|Northern red oak--------------| 85 | 72 |Black walnut, eastern

 |White oak---------------------| 85 | 72 | cottonwood, eastern white

 |Green ash---------------------| 76 | 72 | pine, green ash, northern

 |Sweetgum----------------------| 80 | 86 | red oak, pecan, pin oak,

 |Tuliptree---------------------| 95 | 100 | tuliptree, white oak.

 | | | |

249A: | | | |

 Edinburg---------------------|------------------------------| --- | --- |Common hackberry, eastern

 | | | | cottonwood, green ash, pin

 | | | | oak, river birch, swamp

 | | | | white oak, sweetgum.

 | | | |

257A: | | | |

 Clarksdale-------------------|White oak---------------------| 80 | 57 |Common hackberry, common

 |Northern red oak--------------| 80 | 57 | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

 See footnote at end of table.
Knox County, Illinois 177

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

259C2: | | | |

 Assumption-------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

259D2: | | | |

 Assumption-------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

259D3: | | | |

 Assumption-------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

279B: | | | |

 Rozetta----------------------|White oak---------------------| 80 | 57 |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |Black walnut------------------| --- | --- | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

279C2: | | | |

 Rozetta----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

280B: | | | |

 Fayette----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

280C2: | | | |

 Fayette----------------------|Northern red oak--------------| 80 | 57 |Black walnut, eastern

 |White oak---------------------| 80 | 57 | cottonwood, eastern white

 |Black walnut------------------| --- | --- | pine, green ash, northern

 |Tuliptree---------------------| 90 | 86 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

280D2: | | | |

 Fayette----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
178 Soil Survey of

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

280F: | | | |

 Fayette----------------------|Black walnut------------------| --- | --- |Eastern cottonwood, eastern

 |Northern red oak--------------| 80 | 57 | white pine, green ash,

 |Tuliptree---------------------| 90 | 86 | northern red oak, pecan,

 |White oak---------------------| 80 | 57 | pin oak, tuliptree, white

 | | | | oak.

 | | | |

344B: | | | |

 Harvard----------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

549D2: | | | |

 Marseilles-------------------|Black oak---------------------| --- | --- |Black oak, common hackberry,

 |Northern red oak--------------| 66 | 43 | eastern white pine, green

 |White ash---------------------| --- | --- | ash.

 |White oak---------------------| 66 | 29 |

 | | | |

549F: | | | |

 Marseilles-------------------|Black oak---------------------| --- | --- |Black oak, common hackberry,

 |Northern red oak--------------| 66 | 43 | eastern white pine, green

 |White ash---------------------| --- | --- | ash.

 |White oak---------------------| 66 | 29 |

 | | | |

549G: | | | |

 Marseilles-------------------|Black oak---------------------| --- | --- |Black oak, common hackberry,

 |Northern red oak--------------| 66 | 43 | eastern white pine, green

 |White ash---------------------| --- | --- | ash.

 |White oak---------------------| 66 | 29 |

 | | | |

567B2: | | | |

 Elkhart----------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

567C2: | | | |

 Elkhart----------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

567D2: | | | |

 Elkhart----------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

567D3: | | | |

 Elkhart----------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
Knox County, Illinois 179

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

675B: | | | |

 Greenbush--------------------|White oak---------------------| 80 | 57 |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Black walnut------------------| --- | --- | pine, green ash, northern

 |Tuliptree---------------------| 90 | 86 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

801B: | | | |

 Orthents---------------------|------------------------------| --- | --- |Black locust, black walnut,

 | | | | green ash, northern red

 | | | | oak, tuliptree, white oak.

 | | | |

802B: | | | |

 Orthents---------------------|------------------------------| --- | --- |Black locust, black walnut,

 | | | | green ash, northern red

 | | | | oak, tuliptree, white oak.

 | | | |

871B: | | | |

 Lenzburg---------------------|Black walnut------------------| 73 | --- |Austrian pine, blue spruce,

 |Eastern cottonwood------------| --- | --- | bur oak, chinkapin oak,

 |Sweetgum----------------------| 76 | 72 | common hackberry, eastern

 | | | | cottonwood, green ash.

 | | | |

871D: | | | |

 Lenzburg---------------------|Black walnut------------------| 73 | --- |Black walnut, eastern

 |Eastern cottonwood------------| --- | --- | cottonwood, eastern white

 |Sweetgum----------------------| 76 | 72 | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

871G: | | | |

 Lenzburg---------------------|Black walnut------------------| 73 | --- |Austrian pine, blue spruce,

 |Eastern cottonwood------------| --- | --- | bur oak, chinkapin oak,

 |Sweetgum----------------------| 76 | 72 | common hackberry, eastern

 | | | | cottonwood, green ash.

 | | | |

872B: | | | |

 Rapatee----------------------|------------------------------| --- | --- |Eastern cottonwood, eastern

 | | | | white pine, green ash,

 | | | | northern red oak, pecan,

 | | | | pin oak, tuliptree, white

 | | | | oak.

 | | | |

901B: | | | |

 Ipava------------------------|------------------------------| --- | --- |Common hackberry, common

 | | | | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
180 Soil Survey of

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

902A: | | | |

 Ipava------------------------|------------------------------| --- | --- |Common hackberry, common

 | | | | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

 Sable------------------------|------------------------------| --- | --- |Common hackberry, eastern

 | | | | cottonwood, green ash, pin

 | | | | oak, river birch, swamp

 | | | | white oak, sweetgum.

 | | | |

3074A: | | | |

 Radford----------------------|Eastern cottonwood------------| --- | --- |Common hackberry, common

 |Pin oak-----------------------| 96 | 72 | persimmon, eastern

 |Sweetgum----------------------| 86 | 100 | cottonwood, green ash,

 |Tuliptree---------------------| 90 | 86 | pecan, pin oak, swamp white

 |White ash---------------------| --- | --- | oak.

 | | | |

3107+: | | | |

 Sawmill----------------------|American sycamore-------------| --- | --- |Common hackberry, eastern

 |Cherrybark oak----------------| --- | --- | cottonwood, green ash, pin

 |Eastern cottonwood------------| --- | --- | oak, river birch, swamp

 |Pin oak-----------------------| 90 | 72 | white oak, sweetgum,

 |Sweetgum----------------------| --- | --- | tamarack.

 | | | |

3415A: | | | |

 Orion------------------------|Red maple---------------------| --- | --- |Common hackberry, common

 |Silver maple------------------| 80 | 29 | persimmon, eastern

 |White ash---------------------| --- | --- | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

3451A: | | | |

 Lawson-----------------------|Silver maple------------------| 70 | 29 |Common hackberry, common

 |White ash---------------------| --- | --- | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

7081B: | | | |

 Littleton--------------------|------------------------------| --- | --- |Common hackberry, common

 | | | | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

7104A: | | | |

 Virgil-----------------------|Black walnut------------------| --- | --- |Common hackberry, common

 |Northern red oak--------------| 80 | 57 | persimmon, eastern

 |White oak---------------------| 80 | 57 | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

8077A: | | | |

 Huntsville-------------------|Eastern cottonwood------------| 110 | 157 |Common hackberry, common

 |American sycamore-------------| --- | --- | persimmon, eastern

 |Green ash---------------------| --- | --- | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

 See footnote at end of table.
Knox County, Illinois 181

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

8239A: | | | |

 Dorchester-------------------|Northern red oak--------------| 55 | 43 |Bur oak, common hackberry,

 |White oak---------------------| 55 | 43 | eastern cottonwood, eastern

 | | | | redcedar, green ash.

 | | | |

9017A: | | | |

 Keomah-----------------------|Northern red oak--------------| 70 | 57 |Common hackberry, common

 |White oak---------------------| 65 | 43 | persimmon, eastern

 | | | | cottonwood, green ash,

 | | | | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

9086B: | | | |

 Osco-------------------------|------------------------------| --- | --- |Black walnut, eastern

 | | | | cottonwood, eastern white

 | | | | pine, green ash, northern

 | | | | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

9257A: | | | |

 Clarksdale-------------------|Northern red oak--------------| 80 | 57 |Common hackberry, common

 |White oak---------------------| 80 | 57 | persimmon, eastern

 |Tuliptree---------------------| 90 | 86 | cottonwood, green ash,

 |Black walnut------------------| --- | --- | pecan, pin oak, swamp white

 | | | | oak.

 | | | |

9279B: | | | |

 Rozetta----------------------|Northern red oak--------------| 80 | 57 |Black walnut, eastern

 |White oak---------------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |Black walnut------------------| --- | --- | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

9279C2: | | | |

 Rozetta----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

9280B: | | | |

 Fayette----------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

9280C2: | | | |

 Fayette----------------------|Northern red oak--------------| 80 | 57 |Black walnut, eastern

 |White oak---------------------| 80 | 57 | cottonwood, eastern white

 |Black walnut------------------| --- | --- | pine, green ash, northern

 |Tuliptree---------------------| 90 | 86 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | |

 See footnote at end of table.
182 Soil Survey of

Table 9.--Forestland Productivity--Continued

_______________________________________________________________________________________________________________________

 | Potential productivity | ___________________________________________________________

 Map symbol and soil name | | | |

 | Common trees | Site index |Volume of wood| Suggested trees to plant

 | | | fiber* | _______________________________________________________________________________________________________________________

 | | | |

9675B: | | | |

 Greenbush--------------------|Black walnut------------------| --- | --- |Black walnut, eastern

 |Northern red oak--------------| 80 | 57 | cottonwood, eastern white

 |Tuliptree---------------------| 90 | 86 | pine, green ash, northern

 |White oak---------------------| 80 | 57 | red oak, pecan, pin oak,

 | | | | tuliptree, white oak.

 | | | | ______________________________________________________________________________________________________________________

 * Volume is the yield in cubic feet per acre per year calculated at the age of culmination of the mean annual

increment for fully stocked natural stands.
Knox County, Illinois 183

Table 10a.--Forestland Management

(The information in this table indicates the dominant soil condition but does not eliminate

 the need for onsite investigation. The numbers in the value columns range from 0.01 to

 1.00. The larger the value, the greater the limitation. See text for further explanation

 of ratings in this table)

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas-----------|Moderate | |Poorly suited | |Severe |

 | Stickiness/slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Wetness |0.50 | |

 | | | Low strength |0.50 | |

 | | | Stickiness |0.50 | |

 | | | | | |

8D2: | | | | | |

 Hickory---------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

8F: | | | | | |

 Hickory---------|Moderate | |Poorly suited | |Severe |

 | Slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

8F2: | | | | | |

 Hickory---------|Moderate | |Poorly suited | |Severe |

 | Slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

8G: | | | | | |

 Hickory---------|Severe | |Poorly suited | |Severe |

 | Slope |1.00 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

17A: | | | | | |

 Keomah----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Wetness |0.50 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

19C3: | | | | | |

 Sylvan----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

19D3: | | | | | |

 Sylvan----------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

43A: | | | | | |

 Ipava-----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Wetness |0.50 | |

 | | | | | |

45A: | | | | | |

 Denny-----------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Ponding |1.00 | Low strength |1.00

 | | | Wetness |1.00 | |

 | | | Low strength |0.50 | |

 | | | | | |
184 Soil Survey of

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable-----------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Wetness |1.00 | Low strength |1.00

 | | | Ponding |0.50 | |

 | | | Low strength |0.50 | |

 | | | | | |

86B: | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

86B2: | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

86C: | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

86C2: | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

86D2: | | | | | |

 Osco------------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

119D2: | | | | | |

 Elco------------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

119E2: | | | | | |

 Elco------------|Moderate | |Poorly suited | |Severe |

 | Slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

131B: | | | | | |

 Alvin-----------|Slight | |Well suited | |Moderate |

 | | | | | Low strength |0.50

 | | | | | |

131D: | | | | | |

 Alvin-----------|Slight | |Poorly suited | |Moderate |

 | | | Slope |1.00 | Low strength |0.50

 | | | | | |

131F: | | | | | |

 Alvin-----------|Moderate | |Poorly suited | |Moderate |

 | Slope |0.50 | Slope |1.00 | Low strength |0.50

 | | | | | |

134B: | | | | | |

 Camden----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

134C2: | | | | | |

 Camden----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |
Knox County, Illinois 185

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

134D2: | | | | | |

 Camden----------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

249A: | | | | | |

 Edinburg--------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Ponding |1.00 | Low strength |1.00

 | | | Wetness |1.00 | |

 | | | Low strength |0.50 | |

 | | | | | |

257A: | | | | | |

 Clarksdale------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Wetness |0.50 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

259C2: | | | | | |

 Assumption------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

259D2: | | | | | |

 Assumption------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

259D3: | | | | | |

 Assumption------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

279B: | | | | | |

 Rozetta---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

279C2: | | | | | |

 Rozetta---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

280B: | | | | | |

 Fayette---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

280C2: | | | | | |

 Fayette---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

280D2: | | | | | |

 Fayette---------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

280F: | | | | | |

 Fayette---------|Moderate | |Poorly suited | |Severe |

 | Slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |
186 Soil Survey of

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

344B: | | | | | |

 Harvard---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

536: | | | | | |

 Dumps-----------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

549F: | | | | | |

 Marseilles------|Moderate | |Poorly suited | |Severe |

 | Slope |0.50 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

549G: | | | | | |

 Marseilles------|Severe | |Poorly suited | |Severe |

 | Slope |1.00 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

567B2: | | | | | |

 Elkhart---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

567C2: | | | | | |

 Elkhart---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

567D2: | | | | | |

 Elkhart---------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

567D3: | | | | | |

 Elkhart---------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Wetness |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | Slope |0.50 | |

 | | | | | |

675B: | | | | | |

 Greenbush-------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

801B: | | | | | |

 Orthents--------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

802B: | | | | | |

 Orthents--------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |
Knox County, Illinois 187

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

835G: | | | | | |

 Earthen dams----|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg--------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

871D: | | | | | |

 Lenzburg--------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Slope |1.00 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

871G: | | | | | |

 Lenzburg--------|Severe | |Poorly suited | |Severe |

 | Slope |1.00 | Slope |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

872B: | | | | | |

 Rapatee---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

901B: | | | | | |

 Ipava-----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Wetness |0.50 | |

 | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

902A: | | | | | |

 Ipava-----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Wetness |0.50 | |

 | | | | | |

 Sable-----------|Moderate | |Poorly suited | |Severe |

 | Low strength |0.50 | Wetness |1.00 | Low strength |1.00

 | | | Ponding |0.50 | |

 | | | Low strength |0.50 | |

 | | | | | |

3074A: | | | | | |

 Radford---------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | Wetness |0.50 | |

 | | | | | |

3107+: | | | | | |

 Sawmill---------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Wetness |0.50 | |

 | | | Low strength |0.50 | |

 | | | | | |

3415A: | | | | | |

 Orion-----------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | Wetness |0.50 | |

 | | | | | |
188 Soil Survey of

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

3451A: | | | | | |

 Lawson----------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | Wetness |0.50 | |

 | | | | | |

7081B: | | | | | |

 Littleton-------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Wetness |0.50 | |

 | | | | | |

7104A: | | | | | |

 Virgil----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Wetness |0.50 | |

 | | | | | |

8077A: | | | | | |

 Huntsville------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

8239A: | | | | | |

 Dorchester------|Severe | |Poorly suited | |Severe |

 | Flooding |1.00 | Flooding |1.00 | Low strength |1.00

 | Low strength |0.50 | Low strength |0.50 | |

 | | | | | |

9017A: | | | | | |

 Keomah----------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Wetness |0.50 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

9086B: | | | | | |

 Osco------------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

9257A: | | | | | |

 Clarksdale------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Wetness |0.50 | Low strength |1.00

 | | | Low strength |0.50 | |

 | | | | | |

9279B: | | | | | |

 Rozetta---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

9279C2: | | | | | |

 Rozetta---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |

9280B: | | | | | |

 Fayette---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

9280C2: | | | | | |

 Fayette---------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | Slope |0.50 | |

 | | | | | |
Knox County, Illinois 189

Table 10a.--Forestland Management--Continued

_______________________________________________________________________________________________

 | | |

 Map symbol | Limitations affecting | Suitability for | Soil rutting

 and soil name | construction of | log landings | hazard

 | haul roads and | |

 | log landings | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | _______________________________________________________________________________________________

 | | | | | |

9675B: | | | | | |

 Greenbush-------|Moderate | |Moderately suited | |Severe |

 | Low strength |0.50 | Low strength |0.50 | Low strength |1.00

 | | | | | |

M-W. | | | | | |

 Miscellaneous | | | | | |

 water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | _______________________________________________________________________________________________
190 Soil Survey of

Table 10b.--Forestland Management

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | Stickiness |0.50

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

8F: | | | | | |

 Hickory-------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

8G: | | | | | |

 Hickory-------------|Severe | |Severe | |Poorly suited |

 | Slope/erodibility|0.75 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

17A: | | | | | |

 Keomah--------------|Slight | |Slight | |Moderately suited |

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

43A: | | | | | |

 Ipava---------------|Slight | |Slight | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

45A: | | | | | |

 Denny---------------|Slight | |Slight | |Poorly suited |

 | | | | | Ponding |1.00

 | | | | | Wetness |1.00

 | | | | | Low strength |0.50

 | | | | | |
Knox County, Illinois 191

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable---------------|Slight | |Slight | |Poorly suited |

 | | | | | Wetness |1.00

 | | | | | Ponding |0.50

 | | | | | Low strength |0.50

 | | | | | |

86B: | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

86B2: | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

86C: | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

86C2: | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

86D2: | | | | | |

 Osco----------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

119D2: | | | | | |

 Elco----------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

119E2: | | | | | |

 Elco----------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

131B: | | | | | |

 Alvin---------------|Slight | |Moderate | |Well suited |

 | | | Slope/erodibility|0.50 | |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | |

131F: | | | | | |

 Alvin---------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | |

134B: | | | | | |

 Camden--------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

134C2: | | | | | |

 Camden--------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |
192 Soil Survey of

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

134D2: | | | | | |

 Camden--------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

249A: | | | | | |

 Edinburg------------|Slight | |Slight | |Poorly suited |

 | | | | | Ponding |1.00

 | | | | | Wetness |1.00

 | | | | | Low strength |0.50

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Slight | |Slight | |Moderately suited |

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | |

259C2: | | | | | |

 Assumption----------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

259D2: | | | | | |

 Assumption----------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

259D3: | | | | | |

 Assumption----------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

280B: | | | | | |

 Fayette-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

280F: | | | | | |

 Fayette-------------|Severe | |Severe | |Poorly suited |

 | Slope/erodibility|0.75 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |
Knox County, Illinois 193

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

344B: | | | | | |

 Harvard-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

549F: | | | | | |

 Marseilles----------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

549G: | | | | | |

 Marseilles----------|Severe | |Severe | |Poorly suited |

 | Slope/erodibility|0.75 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Moderate | |Severe | |Poorly suited |

 | Slope/erodibility|0.50 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Slight | |Moderate | |Poorly suited |

 | | | Slope/erodibility|0.50 | Wetness |1.00

 | | | | | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

801B: | | | | | |

 Orthents------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

802B: | | | | | |

 Orthents------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |
194 Soil Survey of

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Slight | |Severe | |Poorly suited |

 | | | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Severe | |Severe | |Poorly suited |

 | Slope/erodibility|0.75 | Slope/erodibility|0.95 | Slope |1.00

 | | | | | Low strength |0.50

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

901B: | | | | | |

 Ipava---------------|Slight | |Slight | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

902A: | | | | | |

 Ipava---------------|Slight | |Slight | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

 Sable---------------|Slight | |Slight | |Poorly suited |

 | | | | | Wetness |1.00

 | | | | | Ponding |0.50

 | | | | | Low strength |0.50

 | | | | | |

3074A: | | | | | |

 Radford-------------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | |

3415A: | | | | | |

 Orion---------------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |
Knox County, Illinois 195

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Slight | |Slight | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Slight | |Slight | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | Wetness |0.50

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Low strength |0.50

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Slight | |Slight | |Poorly suited |

 | | | | | Flooding |1.00

 | | | | | Low strength |0.50

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Slight | |Slight | |Moderately suited |

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | |

9086B: | | | | | |

 Osco----------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Slight | |Slight | |Moderately suited |

 | | | | | Wetness |0.50

 | | | | | Low strength |0.50

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | Slope |0.50

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Slight | |Moderate | |Moderately suited |

 | | | Slope/erodibility|0.50 | Low strength |0.50

 | | | | | |
196 Soil Survey of

Table 10b.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Hazard of off-road | Hazard of erosion | Suitability for roads

 and soil name | or off-trail erosion | on roads and trails | (natural surface) _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 197

Table 10c.--Forestland Management

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Poorly suited | |Poorly suited | |Moderately suited |

 | Stickiness |0.75 | Stickiness |0.75 | Low strength |0.50

 | | | Slope |0.50 | Stickiness |0.50

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

8F: | | | | | |

 Hickory-------------|Moderately suited | |Unsuited | |Moderately suited |

 | Stickiness |0.50 | Slope |1.00 | Low strength |0.50

 | | | Stickiness |0.50 | Slope |0.50

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Moderately suited | |Unsuited | |Moderately suited |

 | Stickiness |0.50 | Slope |1.00 | Low strength |0.50

 | | | Stickiness |0.50 | Slope |0.50

 | | | | | |

8G: | | | | | |

 Hickory-------------|Moderately suited | |Unsuited | |Poorly suited |

 | Slope |0.50 | Slope |1.00 | Slope |1.00

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

17A: | | | | | |

 Keomah--------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

43A: | | | | | |

 Ipava---------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

45A: | | | | | |

 Denny---------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

68A: | | | | | |

 Sable---------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

86B: | | | | | |

 Osco----------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |
198 Soil Survey of

Table 10c.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

86B2: | | | | | |

 Osco----------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

86C: | | | | | |

 Osco----------------|Well suited | |Moderately suited | |Moderately suited |

 | | | Slope |0.50 | Low strength |0.50

 | | | | | |

86C2: | | | | | |

 Osco----------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

86D2: | | | | | |

 Osco----------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Moderately suited | |Poorly suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.75 | Low strength |0.50

 | | | Stickiness |0.50 | Slope |0.50

 | | | | | |

131B: | | | | | |

 Alvin---------------|Well suited | |Well suited | |Well suited |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Well suited | |Moderately suited | |Well suited |

 | | | Slope |0.50 | |

 | | | | | |

131F: | | | | | |

 Alvin---------------|Well suited | |Unsuited | |Moderately suited |

 | | | Slope |1.00 | Slope |0.50

 | | | | | |

134B: | | | | | |

 Camden--------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

134C2: | | | | | |

 Camden--------------|Well suited | |Moderately suited | |Moderately suited |

 | | | Slope |0.50 | Low strength |0.50

 | | | | | |

134D2: | | | | | |

 Camden--------------|Well suited | |Moderately suited | |Moderately suited |

 | | | Slope |0.50 | Low strength |0.50

 | | | | | |

249A: | | | | | |

 Edinburg------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |
Knox County, Illinois 199

Table 10c.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

259C2: | | | | | |

 Assumption----------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

280F: | | | | | |

 Fayette-------------|Moderately suited | |Unsuited | |Moderately suited |

 | Stickiness |0.50 | Slope |1.00 | Low strength |0.50

 | | | Stickiness |0.50 | Slope |0.50

 | | | | | |

344B: | | | | | |

 Harvard-------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

549F: | | | | | |

 Marseilles----------|Moderately suited | |Unsuited | |Moderately suited |

 | Stickiness |0.50 | Slope |1.00 | Low strength |0.50

 | | | Stickiness |0.50 | Slope |0.50

 | | | | | |
200 Soil Survey of

Table 10c.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

549G: | | | | | |

 Marseilles----------|Moderately suited | |Unsuited | |Poorly suited |

 | Slope |0.50 | Slope |1.00 | Slope |1.00

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Poorly suited | |Poorly suited | |Moderately suited |

 | Stickiness |0.75 | Stickiness |0.75 | Low strength |0.50

 | | | Slope |0.50 | |

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

801B: | | | | | |

 Orthents------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

802B: | | | | | |

 Orthents------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Moderately suited | |Unsuited | |Poorly suited |

 | Slope |0.50 | Slope |1.00 | Slope |1.00

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | Rock fragments |0.50 | |

 | | | | | |
Knox County, Illinois 201

Table 10c.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

901B: | | | | | |

 Ipava---------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

 Osco----------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

902A: | | | | | |

 Ipava---------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

 Sable---------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

3074A: | | | | | |

 Radford-------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

3415A: | | | | | |

 Orion---------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

9086B: | | | | | |

 Osco----------------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |
202 Soil Survey of

Table 10c.--Forestland Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Suitability for | Suitability for | Suitability for use of

 and soil name | hand planting | mechanical planting | harvesting equipment _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Stickiness |0.50 | Low strength |0.50

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Moderately suited | |Moderately suited | |Moderately suited |

 | Stickiness |0.50 | Slope |0.50 | Low strength |0.50

 | | | Stickiness |0.50 | |

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Well suited | |Well suited | |Moderately suited |

 | | | | | Low strength |0.50

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 203

Table 10d.--Forestland Management

(The information in this table indicates the dominant soil condition but

 does not eliminate the need for onsite investigation. The numbers in

 the value columns range from 0.01 to 1.00. The larger the value, the

 greater the limitation. See text for further explanation of ratings

 in this table)

_________________________________________________________________________

 | |

 Map symbol | Suitability for | Suitability for

 and soil name | mechanical site | mechanical site

 | preparation (surface) | preparation (deep) ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

7D3: | | | |

 Atlas---------------|Poorly suited | |Well suited |

 | Stickiness |0.50 | |

 | | | |

8D2: | | | |

 Hickory-------------|Well suited | |Well suited |

 | | | |

8F: | | | |

 Hickory-------------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |

8F2: | | | |

 Hickory-------------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |

8G: | | | |

 Hickory-------------|Unsuited | |Unsuited |

 | Slope |1.00 | Slope |1.00

 | | | |

17A: | | | |

 Keomah--------------|Well suited | |Well suited |

 | | | |

19C3: | | | |

 Sylvan--------------|Well suited | |Well suited |

 | | | |

19D3: | | | |

 Sylvan--------------|Well suited | |Well suited |

 | | | |

43A: | | | |

 Ipava---------------|Well suited | |Well suited |

 | | | |

45A: | | | |

 Denny---------------|Well suited | |Well suited |

 | | | |

68A: | | | |

 Sable---------------|Well suited | |Well suited |

 | | | |

86B: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

86B2: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

86C: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

86C2: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

86D2: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |
204 Soil Survey of

Table 10d.--Forestland Management--Continued

_________________________________________________________________________

 | |

 Map symbol | Suitability for | Suitability for

 and soil name | mechanical site | mechanical site

 | preparation (surface) | preparation (deep) ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

119D2: | | | |

 Elco----------------|Well suited | |Well suited |

 | | | |

119E2: | | | |

 Elco----------------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |

131B: | | | |

 Alvin---------------|Well suited | |Well suited |

 | | | |

131D: | | | |

 Alvin---------------|Well suited | |Well suited |

 | | | |

131F: | | | |

 Alvin---------------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |

134B: | | | |

 Camden--------------|Well suited | |Well suited |

 | | | |

134C2: | | | |

 Camden--------------|Well suited | |Well suited |

 | | | |

134D2: | | | |

 Camden--------------|Well suited | |Well suited |

 | | | |

249A: | | | |

 Edinburg------------|Well suited | |Well suited |

 | | | |

257A: | | | |

 Clarksdale----------|Well suited | |Well suited |

 | | | |

259C2: | | | |

 Assumption----------|Well suited | |Well suited |

 | | | |

259D2: | | | |

 Assumption----------|Well suited | |Well suited |

 | | | |

259D3: | | | |

 Assumption----------|Well suited | |Well suited |

 | | | |

279B: | | | |

 Rozetta-------------|Well suited | |Well suited |

 | | | |

279C2: | | | |

 Rozetta-------------|Well suited | |Well suited |

 | | | |

280B: | | | |

 Fayette-------------|Well suited | |Well suited |

 | | | |

280C2: | | | |

 Fayette-------------|Well suited | |Well suited |

 | | | |

280D2: | | | |

 Fayette-------------|Well suited | |Well suited |

 | | | |

280F: | | | |

 Fayette-------------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |
Knox County, Illinois 205

Table 10d.--Forestland Management--Continued

_________________________________________________________________________

 | |

 Map symbol | Suitability for | Suitability for

 and soil name | mechanical site | mechanical site

 | preparation (surface) | preparation (deep) ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

344B: | | | |

 Harvard-------------|Well suited | |Well suited |

 | | | |

536: | | | |

 Dumps---------------|Not rated | |Not rated |

 | | | |

549D2: | | | |

 Marseilles----------|Well suited | |Well suited |

 | | | |

549F: | | | |

 Marseilles----------|Poorly suited | |Poorly suited |

 | Slope |0.50 | Slope |0.50

 | | | |

549G: | | | |

 Marseilles----------|Unsuited | |Unsuited |

 | Slope |1.00 | Slope |1.00

 | | | |

567B2: | | | |

 Elkhart-------------|Well suited | |Well suited |

 | | | |

567C2: | | | |

 Elkhart-------------|Well suited | |Well suited |

 | | | |

567D2: | | | |

 Elkhart-------------|Well suited | |Well suited |

 | | | |

567D3: | | | |

 Elkhart-------------|Well suited | |Well suited |

 | | | |

660C2: | | | |

 Coatsburg-----------|Poorly suited | |Well suited |

 | Stickiness |0.50 | |

 | | | |

675B: | | | |

 Greenbush-----------|Well suited | |Well suited |

 | | | |

801B: | | | |

 Orthents------------|Well suited | |Well suited |

 | | | |

802B: | | | |

 Orthents------------|Well suited | |Well suited |

 | | | |

835G: | | | |

 Earthen dams--------|Not rated | |Not rated |

 | | | |

863, 864, 865: | | | |

 Pits----------------|Not rated | |Not rated |

 | | | |

871B: | | | |

 Lenzburg------------|Well suited | |Well suited |

 | | | |

871D: | | | |

 Lenzburg------------|Well suited | |Well suited |

 | | | |

871G: | | | |

 Lenzburg------------|Unsuited | |Unsuited |

 | Slope |1.00 | Slope |1.00

 | | | |
206 Soil Survey of

Table 10d.--Forestland Management--Continued

_________________________________________________________________________

 | |

 Map symbol | Suitability for | Suitability for

 and soil name | mechanical site | mechanical site

 | preparation (surface) | preparation (deep) ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

872B: | | | |

 Rapatee-------------|Well suited | |Well suited |

 | | | |

901B: | | | |

 Ipava---------------|Well suited | |Well suited |

 | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

902A: | | | |

 Ipava---------------|Well suited | |Well suited |

 | | | |

 Sable---------------|Well suited | |Well suited |

 | | | |

3074A: | | | |

 Radford-------------|Well suited | |Well suited |

 | | | |

3107+: | | | |

 Sawmill-------------|Well suited | |Well suited |

 | | | |

3415A: | | | |

 Orion---------------|Well suited | |Well suited |

 | | | |

3451A: | | | |

 Lawson--------------|Well suited | |Well suited |

 | | | |

7081B: | | | |

 Littleton-----------|Well suited | |Well suited |

 | | | |

7104A: | | | |

 Virgil--------------|Well suited | |Well suited |

 | | | |

8077A: | | | |

 Huntsville----------|Well suited | |Well suited |

 | | | |

8239A: | | | |

 Dorchester----------|Well suited | |Well suited |

 | | | |

9017A: | | | |

 Keomah--------------|Well suited | |Well suited |

 | | | |

9086B: | | | |

 Osco----------------|Well suited | |Well suited |

 | | | |

9257A: | | | |

 Clarksdale----------|Well suited | |Well suited |

 | | | |

9279B: | | | |

 Rozetta-------------|Well suited | |Well suited |

 | | | |

9279C2: | | | |

 Rozetta-------------|Well suited | |Well suited |

 | | | |

9280B: | | | |

 Fayette-------------|Well suited | |Well suited |

 | | | |

9280C2: | | | |

 Fayette-------------|Well suited | |Well suited |

 | | | |
Knox County, Illinois 207

Table 10d.--Forestland Management--Continued

_________________________________________________________________________

 | |

 Map symbol | Suitability for | Suitability for

 and soil name | mechanical site | mechanical site

 | preparation (surface) | preparation (deep) ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

9675B: | | | |

 Greenbush-----------|Well suited | |Well suited |

 | | | |

M-W. | | | |

 Miscellaneous water | | | |

 | | | |

W. | | | |

 Water | | | |

 | | | | _________________________________________________________________________
208 Soil Survey of

Table 10e.--Forestland Management

(The information in this table indicates the

 dominant soil condition but does not

 eliminate the need for onsite

 investigation. The numbers in the value

 columns range from 0.01 to 1.00. The

 larger the value, the greater the

 limitation. See text for further

 explanation of ratings in this table)

_______________________________________________

 |

 Map symbol | Potential for

 and soil name | seedling mortality

 | _________________________

 | Rating class and |Value

 | limiting features | _______________________________________________

 | |

7D3: | |

 Atlas---------------|High |

 | Wetness |1.00

 | |

8D2: | |

 Hickory-------------|Low |

 | |

8F: | |

 Hickory-------------|Low |

 | |

8F2: | |

 Hickory-------------|Low |

 | |

8G: | |

 Hickory-------------|Low |

 | |

17A: | |

 Keomah--------------|High |

 | Wetness |1.00

 | |

19C3: | |

 Sylvan--------------|Low |

 | |

19D3: | |

 Sylvan--------------|Low |

 | |

43A: | |

 Ipava---------------|Low |

 | |

45A: | |

 Denny---------------|High |

 | Wetness |1.00

 | |

68A: | |

 Sable---------------|High |

 | Wetness |1.00

 | |

86B: | |

 Osco----------------|Low |

 | |

86B2: | |

 Osco----------------|Low |

 | |

86C: | |

 Osco----------------|Low |

 | |

86C2: | |

 Osco----------------|Low |

 | |
Knox County, Illinois 209

Table 10e.--Forestland Management-Continued

_______________________________________________

 |

 Map symbol | Potential for

 and soil name | seedling mortality

 | _________________________

 | Rating class and |Value

 | limiting features | _______________________________________________

 | |

86D2: | |

 Osco----------------|Low |

 | |

119D2: | |

 Elco----------------|Low |

 | |

119E2: | |

 Elco----------------|Low |

 | |

131B: | |

 Alvin---------------|Low |

 | |

131D: | |

 Alvin---------------|Low |

 | |

131F: | |

 Alvin---------------|Low |

 | |

134B: | |

 Camden--------------|Low |

 | |

134C2: | |

 Camden--------------|Low |

 | |

134D2: | |

 Camden--------------|Low |

 | |

249A: | |

 Edinburg------------|High |

 | Wetness |1.00

 | |

257A: | |

 Clarksdale----------|High |

 | Wetness |1.00

 | |

259C2: | |

 Assumption----------|Low |

 | |

259D2: | |

 Assumption----------|Low |

 | |

259D3: | |

 Assumption----------|Low |

 | |

279B: | |

 Rozetta-------------|Low |

 | |

279C2: | |

 Rozetta-------------|Low |

 | |

280B: | |

 Fayette-------------|Low |

 | |

280C2: | |

 Fayette-------------|Low |

 | |

280D2: | |

 Fayette-------------|Low |

 | |
210 Soil Survey of

Table 10e.--Forestland Management-Continued

_______________________________________________

 |

 Map symbol | Potential for

 and soil name | seedling mortality

 | _________________________

 | Rating class and |Value

 | limiting features | _______________________________________________

 | |

280F: | |

 Fayette-------------|Low |

 | |

344B: | |

 Harvard-------------|Low |

 | |

536: | |

 Dumps---------------|Not rated |

 | |

549D2: | |

 Marseilles----------|Low |

 | |

549F: | |

 Marseilles----------|Low |

 | |

549G: | |

 Marseilles----------|Low |

 | |

567B2: | |

 Elkhart-------------|Low |

 | |

567C2: | |

 Elkhart-------------|Low |

 | |

567D2: | |

 Elkhart-------------|Low |

 | |

567D3: | |

 Elkhart-------------|Low |

 | |

660C2: | |

 Coatsburg-----------|High |

 | Wetness |1.00

 | |

675B: | |

 Greenbush-----------|Low |

 | |

801B: | |

 Orthents------------|Low |

 | |

802B: | |

 Orthents------------|Low |

 | |

835G: | |

 Earthen dams--------|Not rated |

 | |

863, 864, 865: | |

 Pits----------------|Not rated |

 | |

871B: | |

 Lenzburg------------|Low |

 | |

871D: | |

 Lenzburg------------|Low |

 | |

871G: | |

 Lenzburg------------|Low |

 | |

872B: | |

 Rapatee-------------|Low |

 | |
Knox County, Illinois 211

Table 10e.--Forestland Management-Continued

_______________________________________________

 |

 Map symbol | Potential for

 and soil name | seedling mortality

 | _________________________

 | Rating class and |Value

 | limiting features | _______________________________________________

 | |

901B: | |

 Ipava---------------|Low |

 | |

 Osco----------------|Low |

 | |

902A: | |

 Ipava---------------|Low |

 | |

 Sable---------------|High |

 | Wetness |1.00

 | |

3074A: | |

 Radford-------------|Low |

 | |

3107+: | |

 Sawmill-------------|High |

 | Wetness |1.00

 | |

3415A: | |

 Orion---------------|Low |

 | |

3451A: | |

 Lawson--------------|Low |

 | |

7081B: | |

 Littleton-----------|Low |

 | |

7104A: | |

 Virgil--------------|Low |

 | |

8077A: | |

 Huntsville----------|Low |

 | |

8239A: | |

 Dorchester----------|Moderate |

 | Lime |0.50

 | |

9017A: | |

 Keomah--------------|High |

 | Wetness |1.00

 | |

9086B: | |

 Osco----------------|Low |

 | |

9257A: | |

 Clarksdale----------|High |

 | Wetness |1.00

 | |

9279B: | |

 Rozetta-------------|Low |

 | |

9279C2: | |

 Rozetta-------------|Low |

 | |

9280B: | |

 Fayette-------------|Low |

 | |

9280C2: | |

 Fayette-------------|Low |

 | |
212 Soil Survey of

Table 10e.--Forestland Management-Continued

_______________________________________________

 |

 Map symbol | Potential for

 and soil name | seedling mortality

 | _________________________

 | Rating class and |Value

 | limiting features | _______________________________________________

 | |

9675B: | |

 Greenbush-----------|Low |

 | |

M-W. | |

 Miscellaneous water | |

 | |

W. | |

 Water | |

 | | _______________________________________________
Table 11.--Windbreaks and Environmental Plantings (Absence of an entry indicates that trees generally do not grow to the given height) _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 7D3: | | | |  Atlas-------------------|American |American plum, |Virginia pine, |Norway spruce------- | cranberrybush, | American | arborvitae, black |  | American hazelnut, | witchhazel, | oak, blackgum, bur |  | black chokeberry, | Washington | oak, chinkapin oak,|  | common juniper, | hawthorn, blackhaw,| common hackberry, |  | coralberry, gray | common chokecherry,| eastern redcedar, |  | dogwood, mapleleaf | common | green ash |  | viburnum, silky | serviceberry, | |  | dogwood | nannyberry, prairie| |  | | crabapple, | |  | | roughleaf dogwood, | |  | | staghorn sumac | |  | | | | 8D2, 8F, 8F2, 8G: | | | |  Hickory-----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 17A: | | | |  Keomah------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 19C3, 19D3: | | | |  Sylvan------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 43A: | | | |  Ipava-------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 45A: | | | |  Denny-------------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch, | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 68A: | | | |  Sable-------------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch, | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 86B, 86B2, 86C, 86C2, | | | |  86D2: | | | |  Osco-------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 119D2, 119E2: | | | |  Elco--------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 131B, 131D, 131F: | | | |  Alvin-------------------|American hazelnut, |American plum, |Douglas fir, |Norway spruce,  | black chokeberry, | American | arborvitae, black | common hackberry,  | common winterberry,| witchhazel, Arnold | walnut, blackgum, | pin oak, tuliptree  | coralberry, gray | hawthorn, blackhaw,| blue spruce, bur |  | dogwood, mapleleaf | common chokecherry,| oak, eastern |  | viburnum | common | redcedar, green |  | | serviceberry, | ash, pecan |  | | prairie crabapple | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued ____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |__________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 ____________________________________________________________________________________________________________ | | | | 134B, 134C2, 134D2: | | | |  Camden------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, norther | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 249A: | | | |  Edinburg----------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 257A: | | | |  Clarksdale--------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 259C2, 259D2, 259D3: | | | |  Assumption--------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 279B, 279C2: | | | |  Rozetta-----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 280B, 280C2, 280D2, | | | |  280F: | | | |  Fayette----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 344B: | | | |  Harvard-----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued ____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |__________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 ____________________________________________________________________________________________________________ | | | | 536. | | | |  Dumps | | | |  | | | | 549D2, 549F, 549G: | | | |  Marseilles--------------|American |American plum, bur |Black oak, common |Carolina poplar---- | cranberrybush, | oak, chinkapin oak,| hackberry, eastern |  | American hazelnut, | common | white pine, green |  | black chokeberry, | serviceberry, | ash |  | common chokecherry,| eastern redcedar, | |  | common elderberry, | nannyberry, prairie| |  | common juniper, | crabapple, | |  | coralberry, | roughleaf dogwood, | |  | mapleleaf viburnum,| smooth sumac | |  | silky dogwood | | |  | | | | 567B2, 567C2, 567D2, | | | |  567D3: | | | |  Elkhart----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, norther | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 660C2: | | | |  Coatsburg---------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 675B: | | | |  Greenbush---------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 801B, 802B. | | | |  Orthents | | | |  | | | | 835G. | | | |  Earthen dams | | | |  | | | | 863, 864, 865. | | | |  Pits | | | |  | | | | 871B, 871D, 871G: | | | |  Lenzburg----------------|American hazelnut, |Common serviceberry,|Austrian pine, blue |Eastern cottonwood  | coralberry, | downy arrowwood, | spruce, bur oak, |  | mapleleaf viburnum,| eastern redcedar, | chinkapin oak, |  | redosier dogwood | southern arrowwood | common hackberry, |  | | | green ash |  | | | | 872B: | | | |  Rapatee-----------------|American |American plum, |Virginia pine, |Norway spruce------- | cranberrybush, | American | arborvitae, black |  | American hazelnut, | witchhazel, | oak, blackgum, bur |  | black chokeberry, | Washington | oak, chinkapin oak,|  | common juniper, | hawthorn, blackhaw,| common hackberry, |  | coralberry, gray | common chokecherry,| eastern redcedar, |  | dogwood, mapleleaf | common | green ash |  | viburnum, silky | serviceberry, | |  | dogwood | nannyberry, prairie| |  | | crabapple, | |  | | roughleaf dogwood, | |  | | staghorn sumac | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued ____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |__________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 ____________________________________________________________________________________________________________ | | | | 901B: | | | |  Ipava-------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | |  Osco--------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, norther | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 902A: | | | |  Ipava-------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 902A: | | | |  Sable-------------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch, | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 3074A: | | | |  Radford-----------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 3107+: | | | |  Sawmill-----------------|American |Cockspur hawthorn, |Arborvitae, |Green ash, red  | cranberrybush, | hazel alder, | blackgum, common | maple, river birch, | black chokeberry, | nannyberry, | hackberry, green | swamp white oak,  | buttonbush, common | roughleaf dogwood | hawthorn, northern | sweetgum  | elderberry, common | | white-cedar, |  | ninebark, common | | shingle oak |  | winterberry, gray | | |  | dogwood, highbush | | |  | blueberry, northern| | |  | spicebush, redosier| | |  | dogwood, silky | | |  | dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued ____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |__________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 ____________________________________________________________________________________________________________ | | | | 3415A: | | | |  Orion-------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 3451A: | | | |  Lawson------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 7081B: | | | |  Littleton---------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 7104A: | | | |  Virgil------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 8077A: | | | |  Huntsville--------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 8239A: | | | |  Dorchester--------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued ____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |__________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 ____________________________________________________________________________________________________________ | | | | 9017A: | | | |  Keomah------------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 9086B: | | | |  Osco--------------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, norther | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 9257A: | | | |  Clarksdale--------------|American |Blackhaw, cockspur |Austrian pine, |Norway spruce,  | cranberrybush, | hawthorn, common | Douglas fir, | blackgum, common  | Canada yew, black | pawpaw, common | arborvitae, blue | hackberry, green  | chokeberry, common | serviceberry, | spruce, common | ash, red maple,  | elderberry, common | prairie crabapple, | persimmon, eastern | swamp white oak,  | juniper, common | roughleaf dogwood, | redcedar, green | sweetgum  | ninebark, common | rusty blackhaw, | hawthorn, |  | winterberry, | southern arrowwood,| nannyberry, pecan, |  | northern spicebush,| witchhazel | shingle oak |  | redosier dogwood, | | |  | silky dogwood | | |  | | | | 
Table 11.--Windbreaks and Environmental Plantings--Continued _____________________________________________________________________________________________________________

 | Trees having predicted 20-year average height, in feet, of-- Map symbol |___________________________________________________________________________________ and soil name | <8 | 8-15 | 16-25 | 26-35 _____________________________________________________________________________________________________________ | | | | 9279B, 9279C2: | | | |  Rozetta-----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 9280B, 9280C2: | | | |  Fayette-----------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | 9675B: | | | |  Greenbush---------------|American hazelnut, |American plum, |Washington hawthorn,|Douglas fir, Norway  | black chokeberry, | American | arborvitae, blue | spruce, black  | common elderberry, | witchhazel, | spruce, common | walnut, blackgum,  | common juniper, | blackhaw, common | persimmon, eastern | common hackberry,  | common ninebark, | chokecherry, common| redcedar, | green ash, northern | common winterberry,| serviceberry, | nannyberry, pecan, | red oak, pin oak,  | coralberry, | prairie crabapple, | white oak | tuliptree  | mapleleaf viburnum,| roughleaf dogwood, | |  | redosier dogwood, | smooth sumac, | |  | silky dogwood | southern arrowwood | |  | | | | M-W. | | | |  Miscellaneous water | | | |  | | | | W. | | | |  Water | | | |  | | | | _____________________________________________________________________________________________________________
226 Soil Survey of

Table 12a.--Recreational Development

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Restricted |1.00 | Depth to |1.00

 | saturated zone | | permeability | | saturated zone |

 | Restricted |1.00 | Slope |0.96 | Slope |1.00

 | permeability | | Depth to |0.94 | Restricted |1.00

 | Slope |0.96 | saturated zone | | permeability |

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

8F: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

17A: | | | | | |

 Keomah--------------|Very limited | |Somewhat limited | |Very limited |

 | Depth to |1.00 | Restricted |0.96 | Depth to |1.00

 | saturated zone | | permeability | | saturated zone |

 | Restricted |0.96 | Depth to |0.94 | Restricted |0.96

 | permeability | | saturated zone | | permeability |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

43A: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.98 | Depth to |0.75 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |0.21 | Restricted |0.21 | Restricted |0.21

 | permeability | | permeability | | permeability |

 | | | | | |

45A: | | | | | |

 Denny---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Depth to |1.00

 | saturated zone | | Depth to |1.00 | saturated zone |

 | Ponding |1.00 | saturated zone | | Ponding |1.00

 | Restricted |0.96 | Restricted |0.96 | Restricted |0.96

 | permeability | | permeability | | permeability |

 | | | | | |
Knox County, Illinois 227

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | | | | | |

86B: | | | | | |

 Osco----------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

86B2: | | | | | |

 Osco----------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

86C: | | | | | |

 Osco----------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

86C2: | | | | | |

 Osco----------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

86D2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

119D2: | | | | | |

 Elco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Restricted |0.43 | Restricted |0.43 | Restricted |0.43

 | permeability | | permeability | | permeability |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Restricted |0.43 | Restricted |0.43 | Restricted |0.43

 | permeability | | permeability | | permeability |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

131D: | | | | | |

 Alvin---------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

134B: | | | | | |

 Camden--------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

134C2: | | | | | |

 Camden--------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

134D2: | | | | | |

 Camden--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |
228 Soil Survey of

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

249A: | | | | | |

 Edinburg------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Depth to |1.00

 | saturated zone | | Depth to |1.00 | saturated zone |

 | Ponding |1.00 | saturated zone | | Ponding |1.00

 | Restricted |0.96 | Restricted |0.96 | Restricted |0.96

 | permeability | | permeability | | permeability |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Very limited | |Somewhat limited | |Very limited |

 | Depth to |1.00 | Depth to |0.94 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |0.21 | Restricted |0.21 | Restricted |0.21

 | permeability | | permeability | | permeability |

 | | | | | |

259C2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Restricted |0.43 | Restricted |0.43 | Slope |1.00

 | permeability | | permeability | | Restricted |0.43

 | | | | | permeability |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Restricted |0.43 | Restricted |0.43 | Restricted |0.43

 | permeability | | permeability | | permeability |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Restricted |0.43 | Restricted |0.43 | Restricted |0.43

 | permeability | | permeability | | permeability |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

280B: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

344B: | | | | | |

 Harvard-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |
Knox County, Illinois 229

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Restricted |0.96 | Restricted |0.96 | Slope |1.00

 | permeability | | permeability | | Restricted |0.96

 | Slope |0.96 | Slope |0.96 | permeability |

 | | | | | Depth to bedrock |0.71

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Restricted |0.96 | Restricted |0.96 | Restricted |0.96

 | permeability | | permeability | | permeability |

 | | | | | Depth to bedrock |0.10

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Restricted |0.96 | Restricted |0.96 | Restricted |0.96

 | permeability | | permeability | | permeability |

 | | | | | Depth to bedrock |0.10

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |1.00 | Restricted |1.00 | Restricted |1.00

 | permeability | | permeability | | permeability |

 | | | | | Slope |1.00

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

801B: | | | | | |

 Orthents------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.39 | Depth to |0.19 | Slope |0.50

 | saturated zone | | saturated zone | | Depth to |0.39

 | | | | | saturated zone |

 | | | | | |
230 Soil Survey of

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

802B: | | | | | |

 Orthents------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Restricted |0.21 | Restricted |0.21 | Slope |0.50

 | permeability | | permeability | | Restricted |0.21

 | | | | | permeability |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Restricted |0.21 | Restricted |0.21 | Slope |0.50

 | permeability | | permeability | | Gravel content |0.47

 | | | | | Restricted |0.21

 | | | | | permeability |

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.91 | Slope |0.91 | Slope |1.00

 | Restricted |0.21 | Restricted |0.21 | Gravel content |0.47

 | permeability | | permeability | | Restricted |0.21

 | | | | | permeability |

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Restricted |0.21 | Restricted |0.21 | Gravel content |0.47

 | permeability | | permeability | | Restricted |0.21

 | | | | | permeability |

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Restricted |0.43 | Restricted |0.43 | Restricted |0.43

 | permeability | | permeability | | permeability |

 | | | | | Slope |0.28

 | | | | | |

901B: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.98 | Depth to |0.75 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |0.21 | Restricted |0.21 | Restricted |0.21

 | permeability | | permeability | | permeability |

 | | | | | |

 Osco----------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

902A: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.98 | Depth to |0.75 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |0.21 | Restricted |0.21 | Restricted |0.21

 | permeability | | permeability | | permeability |

 | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Depth to |1.00

 | saturated zone | | Depth to |1.00 | saturated zone |

 | Ponding |1.00 | saturated zone | | Ponding |1.00

 | | | | | |
Knox County, Illinois 231

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

3074A: | | | | | |

 Radford-------------|Very limited | |Somewhat limited | |Very limited |

 | Flooding |1.00 | Depth to |0.75 | Flooding |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Flooding |0.40 | saturated zone |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Flooding |1.00 | Flooding |0.40 | Flooding |1.00

 | | | | | |

3415A: | | | | | |

 Orion---------------|Very limited | |Somewhat limited | |Very limited |

 | Flooding |1.00 | Depth to |0.75 | Flooding |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Flooding |0.40 | saturated zone |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Very limited | |Somewhat limited | |Very limited |

 | Flooding |1.00 | Depth to |0.75 | Flooding |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Flooding |0.40 | saturated zone |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Flooding |1.00 | Depth to |0.75 | Depth to |0.98

 | Depth to |0.98 | saturated zone | | saturated zone |

 | saturated zone | | | | |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Flooding |1.00 | Depth to |0.75 | Depth to |0.98

 | Depth to |0.98 | saturated zone | | saturated zone |

 | saturated zone | | | | |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Very limited | |Not limited | |Somewhat limited |

 | Flooding |1.00 | | | Flooding |0.60

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Very limited | |Not limited | |Somewhat limited |

 | Flooding |1.00 | | | Flooding |0.60

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Very limited | |Somewhat limited | |Very limited |

 | Depth to |1.00 | Restricted |0.96 | Depth to |1.00

 | saturated zone | | permeability | | saturated zone |

 | Restricted |0.96 | Depth to |0.94 | Restricted |0.96

 | permeability | | saturated zone | | permeability |

 | | | | | |

9086B: | | | | | |

 Osco----------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Very limited | |Somewhat limited | |Very limited |

 | Depth to |1.00 | Depth to |0.94 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Restricted |0.21 | Restricted |0.21 | Restricted |0.21

 | permeability | | permeability | | permeability |

 | | | | | |
232 Soil Survey of

Table 12a.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Camp areas | Picnic areas | Playgrounds

 and soil name | | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Very limited |

 | | | | | Slope |1.00

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.28

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 233

Table 12b.--Recreational Development

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Paths and trails | Off-road | Golf fairways

 and soil name | | motorcycle trails | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.86 | Depth to |0.86 | Slope |0.96

 | saturated zone | | saturated zone | | Depth to |0.94

 | | | | | saturated zone |

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.96

 | | | | | |

8F, 8F2: | | | | | |

 Hickory-------------|Very limited | |Somewhat limited | |Very limited |

 | Slope |1.00 | Slope |0.04 | Slope |1.00

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

17A: | | | | | |

 Keomah--------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.86 | Depth to |0.86 | Depth to |0.94

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Not limited | |Not limited | |Not limited |

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

43A: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.44 | Depth to |0.44 | Depth to |0.75

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

45A: | | | | | |

 Denny---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Ponding |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Ponding |1.00 | Ponding |1.00 | saturated zone |

 | | | | | |

68A: | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | | | | | |

86B, 86B2, 86C, | | | | | |

 86C2: | | | | | |

 Osco---------------|Not limited | |Not limited | |Not limited |

 | | | | | |

86D2: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |
234 Soil Survey of

Table 12b.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Paths and trails | Off-road | Golf fairways

 and soil name | | motorcycle trails | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

119D2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |1.00

 | Slope |0.82 | | | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Not limited | |Not limited | |Not limited |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.96

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Somewhat limited | |Very limited |

 | Slope |1.00 | Slope |0.04 | Slope |1.00

 | | | | | |

134B, 134C2: | | | | | |

 Camden--------------|Not limited | |Not limited | |Not limited |

 | | | | | |

134D2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

249A: | | | | | |

 Edinburg------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Ponding |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Ponding |1.00 | Ponding |1.00 | saturated zone |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.86 | Depth to |0.86 | Depth to |0.94

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

259C2: | | | | | |

 Assumption----------|Not limited | |Not limited | |Not limited |

 | | | | | |

259D2, 259D3: | | | | | |

 Assumption----------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

279B, 279C2: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

280B, 280C2: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Very limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |1.00

 | Slope |1.00 | Slope |0.02 | |

 | | | | | |
Knox County, Illinois 235

Table 12b.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Paths and trails | Off-road | Golf fairways

 and soil name | | motorcycle trails | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

344B: | | | | | |

 Harvard-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.96

 | | | | | Depth to bedrock |0.71

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Somewhat limited | |Very limited |

 | Slope |1.00 | Slope |0.04 | Slope |1.00

 | | | | | Depth to bedrock |0.10

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | Depth to bedrock |0.10

 | | | | | |

567B2, 567C2: | | | | | |

 Elkhart-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.96

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Somewhat limited |

 | Water erosion |1.00 | Water erosion |1.00 | Slope |0.96

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Not limited | |Not limited | |Not limited |

 | | | | | |

801B: | | | | | |

 Orthents------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Depth to |0.19

 | | | | | saturated zone |

 | | | | | |

802B: | | | | | |

 Orthents------------|Not limited | |Not limited | |Not limited |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Not limited | |Not limited | |Not limited |

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Slope |0.91

 | | | | | |
236 Soil Survey of

Table 12b.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Paths and trails | Off-road | Golf fairways

 and soil name | | motorcycle trails | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

901B: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.44 | Depth to |0.44 | Depth to |0.75

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

 Osco----------------|Not limited | |Not limited | |Not limited |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.44 | Depth to |0.44 | Depth to |0.75

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Ponding |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Ponding |1.00 | Ponding |1.00 | saturated zone |

 | | | | | |

3074A: | | | | | |

 Radford-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Depth to |0.44 | Depth to |0.44 | Flooding |1.00

 | saturated zone | | saturated zone | | Depth to |0.75

 | Flooding |0.40 | Flooding |0.40 | saturated zone |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Flooding |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Flooding |0.40 | Flooding |0.40 | saturated zone |

 | | | | | |

3415A: | | | | | |

 Orion---------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Depth to |0.44 | Depth to |0.44 | Flooding |1.00

 | saturated zone | | saturated zone | | Depth to |0.75

 | Flooding |0.40 | Flooding |0.40 | saturated zone |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Depth to |0.44 | Depth to |0.44 | Flooding |1.00

 | saturated zone | | saturated zone | | Depth to |0.75

 | Flooding |0.40 | Flooding |0.40 | saturated zone |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.44 | Depth to |0.44 | Depth to |0.75

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.44 | Depth to |0.44 | Depth to |0.75

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Flooding |0.60

 | | | | | |
Knox County, Illinois 237

Table 12b.--Recreational Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Paths and trails | Off-road | Golf fairways

 and soil name | | motorcycle trails | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Not limited | |Not limited | |Somewhat limited |

 | | | | | Flooding |0.60

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.86 | Depth to |0.86 | Depth to |0.94

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

9086B: | | | | | |

 Osco----------------|Not limited | |Not limited | |Not limited |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.86 | Depth to |0.86 | Depth to |0.94

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

9279B, 9279C2: | | | | | |

 Rozetta-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

9280B, 9280C2: | | | | | |

 Fayette-------------|Not limited | |Not limited | |Not limited |

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Not limited | |Not limited | |Not limited |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
238 Soil Survey of

Table 13.--Wildlife Habitat

(See text for definitions of terms used in this table. Absence of an entry indicates that no rating is

 applicable)

_____________________________________________________________________________________________________________

 | Potential for habitat elements |Potential as habitat for-- _________________________________________________________________________________________

 Map symbol | | | Wild | | | | | | |

 and soil name | Grain |Grasses | herba- |Hardwood| Conif- |Wetland |Shallow |Openland|Woodland|Wetland

 |and seed| and | ceous | trees | erous | plants | water |wildlife|wildlife|wildlife

 | crops |legumes | plants | | plants | | areas | | | _____________________________________________________________________________________________________________

 | | | | | | | | | |

7D3: | | | | | | | | | |

 Atlas-------------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

8D2: | | | | | | | | | |

 Hickory-----------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

8F: | | | | | | | | | |

 Hickory-----------|Very |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

8F2: | | | | | | | | | |

 Hickory-----------|Very |Fair |Good |Good |Good |Very |Very |Poor |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

8G: | | | | | | | | | |

 Hickory-----------|Very |Poor |Good |Good |Good |Very |Very |Poor |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

17A: | | | | | | | | | |

 Keomah------------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

19C3: | | | | | | | | | |

 Sylvan------------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

19D3: | | | | | | | | | |

 Sylvan------------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

43A: | | | | | | | | | |

 Ipava-------------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

45A: | | | | | | | | | |

 Denny-------------|Poor |Poor |Poor |Poor |Poor |Good |Good |Poor |Poor |Good.

 | | | | | | | | | |

68A: | | | | | | | | | |

 Sable-------------|Fair |Fair |Fair |Fair |Fair |Good |Good |Fair |Fair |Good.

 | | | | | | | | | |

86B: | | | | | | | | | |

 Osco--------------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

86B2: | | | | | | | | | |

 Osco--------------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

86C: | | | | | | | | | |

 Osco--------------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

86C2: | | | | | | | | | |

 Osco--------------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |
Knox County, Illinois 239

Table 13.--Wildlife Habitat--Continued

_____________________________________________________________________________________________________________

 | Potential for habitat elements |Potential as habitat for-- _________________________________________________________________________________________

 Map symbol | | | Wild | | | | | | |

 and soil name | Grain |Grasses | herba- |Hardwood| Conif- |Wetland |Shallow |Openland|Woodland|Wetland

 |and seed| and | ceous | trees | erous | plants | water |wildlife|wildlife|wildlife

 | crops |legumes | plants | | plants | | areas | | | _____________________________________________________________________________________________________________

 | | | | | | | | | |

86D2: | | | | | | | | | |

 Osco--------------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

119D2: | | | | | | | | | |

 Elco--------------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

119E2: | | | | | | | | | |

 Elco--------------|Poor |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

131B: | | | | | | | | | |

 Alvin-------------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

131D: | | | | | | | | | |

 Alvin-------------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

131F: | | | | | | | | | |

 Alvin-------------|Poor |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

134B: | | | | | | | | | |

 Camden------------|Good |Good |Good |Good |Good |Poor |Poor |Good |Good |Poor.

 | | | | | | | | | |

134C2: | | | | | | | | | |

 Camden------------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

134D2: | | | | | | | | | |

 Camden------------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

249A: | | | | | | | | | |

 Edinburg----------|Fair |Fair |Fair |Fair |Fair |Good |Good |Fair |Fair |Good.

 | | | | | | | | | |

257A: | | | | | | | | | |

 Clarksdale--------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

259C2: | | | | | | | | | |

 Assumption--------|Fair |Good |Good |Good |Good |Poor |Very |Good |Fair |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

259D2: | | | | | | | | | |

 Assumption--------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

259D3: | | | | | | | | | |

 Assumption--------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

279B: | | | | | | | | | |

 Rozetta-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

279C2: | | | | | | | | | |

 Rozetta-----------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |
240 Soil Survey of

Table 13.--Wildlife Habitat--Continued

_____________________________________________________________________________________________________________

 | Potential for habitat elements |Potential as habitat for-- _________________________________________________________________________________________

 Map symbol | | | Wild | | | | | | |

 and soil name | Grain |Grasses | herba- |Hardwood| Conif- |Wetland |Shallow |Openland|Woodland|Wetland

 |and seed| and | ceous | trees | erous | plants | water |wildlife|wildlife|wildlife

 | crops |legumes | plants | | plants | | areas | | | _____________________________________________________________________________________________________________

 | | | | | | | | | |

280B: | | | | | | | | | |

 Fayette-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

280C2: | | | | | | | | | |

 Fayette-----------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

280D2: | | | | | | | | | |

 Fayette-----------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

280F: | | | | | | | | | |

 Fayette-----------|Very |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

344B: | | | | | | | | | |

 Harvard-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

536. | | | | | | | | | |

 Dumps | | | | | | | | | |

 | | | | | | | | | |

549D2: | | | | | | | | | |

 Marseilles--------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

549F: | | | | | | | | | |

 Marseilles--------|Very |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

549G: | | | | | | | | | |

 Marseilles--------|Very |Poor |Good |Good |Good |Very |Very |Poor |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

567B2: | | | | | | | | | |

 Elkhart-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

567C2: | | | | | | | | | |

 Elkhart-----------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

567D2: | | | | | | | | | |

 Elkhart-----------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

567D3: | | | | | | | | | |

 Elkhart-----------|Fair |Good |Good |Good |Good |Very |Very |Good |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

660C2: | | | | | | | | | |

 Coatsburg---------|Fair |Fair |Fair |Fair |Fair |Very |Very |Fair |Fair |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

675B: | | | | | | | | | |

 Greenbush---------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

801B: | | | | | | | | | |

 Orthents----------|Good |Good |Good |Good |Good |Fair |Poor |Good |Good |Poor.

 | | | | | | | | | |
Knox County, Illinois 241

Table 13.--Wildlife Habitat--Continued

_____________________________________________________________________________________________________________

 | Potential for habitat elements |Potential as habitat for-- _________________________________________________________________________________________

 Map symbol | | | Wild | | | | | | |

 and soil name | Grain |Grasses | herba- |Hardwood| Conif- |Wetland |Shallow |Openland|Woodland|Wetland

 |and seed| and | ceous | trees | erous | plants | water |wildlife|wildlife|wildlife

 | crops |legumes | plants | | plants | | areas | | | _____________________________________________________________________________________________________________

 | | | | | | | | | |

802B. | | | | | | | | | |

 Orthents | | | | | | | | | |

 | | | | | | | | | |

835G. | | | | | | | | | |

 Earthen dams | | | | | | | | | |

 | | | | | | | | | |

863, 864, 865. | | | | | | | | | |

 Pits | | | | | | | | | |

 | | | | | | | | | |

871B: | | | | | | | | | |

 Lenzburg----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

871D: | | | | | | | | | |

 Lenzburg----------|Poor |Fair |Good |Good |Good |Very |Very |Fair |Good |Very

 | | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

871G: | | | | | | | | | |

 Lenzburg----------|Very |Poor |Good |Good |Good |Very |Very |Poor |Good |Very

 | poor. | | | | | poor. | poor. | | | poor.

 | | | | | | | | | |

872B: | | | | | | | | | |

 Rapatee-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

901B: | | | | | | | | | |

 Ipava-------------|Good |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

 Osco--------------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

902A: | | | | | | | | | |

 Ipava-------------|Good |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

 Sable-------------|Fair |Good |Good |Fair |Fair |Good |Good |Good |Fair |Good.

 | | | | | | | | | |

3074A: | | | | | | | | | |

 Radford-----------|Poor |Fair |Fair |Good |Good |Fair |Fair |Fair |Good |Fair.

 | | | | | | | | | |

3107+: | | | | | | | | | |

 Sawmill-----------|Poor |Fair |Fair |Fair |Fair |Good |Good |Fair |Fair |Good.

 | | | | | | | | | |

3415A: | | | | | | | | | |

 Orion-------------|Poor |Fair |Fair |Good |Good |Fair |Fair |Fair |Good |Fair.

 | | | | | | | | | |

3451A: | | | | | | | | | |

 Lawson------------|Poor |Fair |Fair |Good |Good |Fair |Fair |Fair |Good |Fair.

 | | | | | | | | | |

7081B: | | | | | | | | | |

 Littleton---------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

7104A: | | | | | | | | | |

 Virgil------------|Good |Good |Good |Good |Good |Fair |Poor |Good |Good |Poor.

 | | | | | | | | | |

8077A: | | | | | | | | | |

 Huntsville--------|Good |Good |Good |Good |Good |Poor |Poor |Good |Good |Poor.

 | | | | | | | | | |

8239A: | | | | | | | | | |

 Dorchester--------|Fair |Fair |Fair |Fair |Poor |Poor |Poor |Fair |Poor |Poor.

 | | | | | | | | | |
242 Soil Survey of

Table 13.--Wildlife Habitat--Continued

_____________________________________________________________________________________________________________

 | Potential for habitat elements |Potential as habitat for-- _________________________________________________________________________________________

 Map symbol | | | Wild | | | | | | |

 and soil name | Grain |Grasses | herba- |Hardwood| Conif- |Wetland |Shallow |Openland|Woodland|Wetland

 |and seed| and | ceous | trees | erous | plants | water |wildlife|wildlife|wildlife

 | crops |legumes | plants | | plants | | areas | | | _____________________________________________________________________________________________________________

 | | | | | | | | | |

9017A: | | | | | | | | | |

 Keomah------------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

9086B: | | | | | | | | | |

 Osco--------------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

9257A: | | | | | | | | | |

 Clarksdale--------|Fair |Good |Good |Good |Good |Fair |Fair |Good |Good |Fair.

 | | | | | | | | | |

9279B: | | | | | | | | | |

 Rozetta-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

9279C2: | | | | | | | | | |

 Rozetta-----------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

9280B: | | | | | | | | | |

 Fayette-----------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

9280C2: | | | | | | | | | |

 Fayette-----------|Fair |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

9675B: | | | | | | | | | |

 Greenbush---------|Good |Good |Good |Good |Good |Poor |Very |Good |Good |Very

 | | | | | | | poor. | | | poor.

 | | | | | | | | | |

M-W. | | | | | | | | | |

 Miscellaneous | | | | | | | | | |

 water | | | | | | | | | |

 | | | | | | | | | |

W. | | | | | | | | | |

 Water | | | | | | | | | |

 | | | | | | | | | | _____________________________________________________________________________________________________________
Knox County, Illinois 243

Table 14a.--Building Site Development

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Slope |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Shrink-swell |1.00 | Shrink-swell |1.00 | saturated zone |

 | Slope |0.96 | Slope |0.96 | Shrink-swell |1.00

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

8F: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

17A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | | | Shrink-swell |1.00

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | | | Shrink-swell |0.50

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | | | Shrink-swell |0.50

 | | | | | |

43A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Shrink-swell |1.00 | Depth to |1.00 | Shrink-swell |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Shrink-swell |1.00 | saturated zone |

 | | | | | |

45A: | | | | | |

 Denny---------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | |
244 Soil Survey of

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

86B: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

86B2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

86C: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | Depth to |0.15 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

86C2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | Depth to |0.15 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

86D2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Somewhat limited | |Very limited | |Very limited |

 | Slope |0.96 | Shrink-swell |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Depth to |0.99 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | Slope |0.96 | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |1.00 | Shrink-swell |0.50

 | | | Depth to |0.99 | |

 | | | saturated zone | | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Not limited | |Not limited | |Not limited |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | | | |
Knox County, Illinois 245

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | | | | | |

134B: | | | | | |

 Camden--------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Shrink-swell |0.50 | | | Shrink-swell |0.50

 | | | | | |

134C2: | | | | | |

 Camden--------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Shrink-swell |0.50 | | | Slope |0.97

 | | | | | Shrink-swell |0.50

 | | | | | |

134D2: | | | | | |

 Camden--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | | | Shrink-swell |0.50

 | | | | | |

249A: | | | | | |

 Edinburg------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | |

259C2: | | | | | |

 Assumption----------|Very limited | |Very limited | |Very limited |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | Depth to |0.99 | Slope |0.97

 | | | saturated zone | | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Somewhat limited | |Very limited | |Very limited |

 | Slope |0.96 | Shrink-swell |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Depth to |0.99 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | Slope |0.96 | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Somewhat limited | |Very limited | |Very limited |

 | Slope |0.96 | Shrink-swell |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Depth to |0.99 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | Slope |0.96 | |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |
246 Soil Survey of

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | Depth to |0.15 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | | | Shrink-swell |0.50

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

344B: | | | | | |

 Harvard-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | Depth to soft |0.71 | Shrink-swell |0.50

 | | | bedrock | | |

 | | | Shrink-swell |0.50 | |

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to soft |0.10 | |

 | | | bedrock | | |

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to soft |0.10 | |

 | | | bedrock | | |

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Depth to |0.16 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Depth to |0.16 | Slope |0.97

 | | | saturated zone | | Shrink-swell |0.50

 | | | | | |
Knox County, Illinois 247

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | Shrink-swell |0.50 | Depth to |0.16 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |0.96 | Slope |1.00

 | | | Depth to |0.16 | |

 | | | saturated zone | | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | Slope |1.00

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

801B: | | | | | |

 Orthents------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Shrink-swell |0.50 | Depth to |1.00 | Shrink-swell |0.50

 | Depth to |0.39 | saturated zone | | Depth to |0.39

 | saturated zone | | Shrink-swell |0.50 | saturated zone |

 | | | | | |

802B: | | | | | |

 Orthents------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.91 | Slope |0.91 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.47 | |

 | | | saturated zone | | |

 | | | | | |
248 Soil Survey of

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

901B: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Shrink-swell |1.00 | Depth to |1.00 | Shrink-swell |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Shrink-swell |1.00 | saturated zone |

 | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Shrink-swell |1.00 | Depth to |1.00 | Shrink-swell |1.00

 | Depth to |0.98 | saturated zone | | Depth to |0.98

 | saturated zone | | Shrink-swell |1.00 | saturated zone |

 | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

3074A: | | | | | |

 Radford-------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |0.98 | Depth to |1.00 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | | | Shrink-swell |0.50 | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

3415A: | | | | | |

 Orion---------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |0.98 | Depth to |1.00 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |0.98 | Depth to |1.00 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | | | Shrink-swell |0.50 | |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |0.98 | Depth to |1.00 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | |
Knox County, Illinois 249

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Depth to |0.98 | Depth to |1.00 | Depth to |0.98

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.16 | |

 | | | saturated zone | | |

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Flooding |1.00

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | |

9086B: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Shrink-swell |1.00 | Shrink-swell |1.00

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | Depth to |0.15 | Shrink-swell |0.50

 | | | saturated zone | | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Slope |0.97

 | | | | | Shrink-swell |0.50

 | | | | | |
250 Soil Survey of

Table 14a.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Dwellings without | Dwellings with | Small commercial

 and soil name | basements | basements | buildings _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Shrink-swell |0.50 | Shrink-swell |0.50 | Shrink-swell |0.50

 | | | Depth to |0.15 | |

 | | | saturated zone | | |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 251

Table 14b.--Building Site Development

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Slope |0.96

 | Low strength |1.00 | saturated zone | | Depth to |0.94

 | Shrink-swell |1.00 | Slope |0.96 | saturated zone |

 | Slope |0.96 | Cutbanks cave |0.10 | |

 | Depth to |0.94 | Too clayey |0.02 | |

 | saturated zone | | | | |

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Low strength |1.00 | Slope |0.96 | Slope |0.96

 | Slope |0.96 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |

8F: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |

17A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.94

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.94 | | | |

 | saturated zone | | | | |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.50 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |
252 Soil Survey of

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Cutbanks cave |0.50 | |

 | Slope |0.96 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

43A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.75

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.75 | | | |

 | saturated zone | | | | |

 | | | | | |

45A: | | | | | |

 Denny---------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |1.00 | | | |

 | | | | | |

68A: | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Frost action |1.00 | Ponding |1.00 | Ponding |1.00

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Ponding |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

86B: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

86B2: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

86C: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

86C2: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |
Knox County, Illinois 253

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

86D2: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Depth to |0.15 | |

 | Slope |0.96 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |0.99 | Slope |0.96

 | Low strength |1.00 | saturated zone | | |

 | Slope |0.96 | Slope |0.96 | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Frost action |1.00 | Depth to |0.99 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Somewhat limited | |Very limited | |Not limited |

 | Frost action |0.50 | Cutbanks cave |1.00 | |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |0.96 | Cutbanks cave |1.00 | Slope |0.96

 | Frost action |0.50 | Slope |0.96 | |

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Frost action |0.50 | Cutbanks cave |1.00 | |

 | | | | | |

134B: | | | | | |

 Camden--------------|Very limited | |Very limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |1.00 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

134C2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |1.00 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

134D2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Cutbanks cave |1.00 | Slope |0.96

 | Low strength |1.00 | Slope |0.96 | |

 | Slope |0.96 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |
254 Soil Survey of

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

249A: | | | | | |

 Edinburg------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |1.00 | | | |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.94

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.94 | | | |

 | saturated zone | | | | |

 | | | | | |

259C2: | | | | | |

 Assumption----------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.99 | |

 | Shrink-swell |1.00 | saturated zone | | |

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |0.99 | Slope |0.96

 | Low strength |1.00 | saturated zone | | |

 | Slope |0.96 | Slope |0.96 | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |0.99 | Slope |0.96

 | Low strength |1.00 | saturated zone | | |

 | Slope |0.96 | Slope |0.96 | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |
Knox County, Illinois 255

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Slope |0.96 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

344B: | | | | | |

 Harvard-------------|Very limited | |Very limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |1.00 | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Depth to soft |0.71 | Depth to bedrock |0.71

 | Slope |0.96 | bedrock | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Frost action |1.00 | Cutbanks cave |0.10 | Depth to bedrock |0.10

 | Low strength |1.00 | Depth to soft |0.10 | |

 | Shrink-swell |0.50 | bedrock | | |

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Frost action |1.00 | Cutbanks cave |0.10 | Depth to bedrock |0.10

 | Low strength |1.00 | Depth to soft |0.10 | |

 | Shrink-swell |0.50 | bedrock | | |

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.50 | |

 | Low strength |1.00 | Depth to |0.16 | |

 | Shrink-swell |0.50 | saturated zone | | |

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.50 | |

 | Low strength |1.00 | Depth to |0.16 | |

 | Shrink-swell |0.50 | saturated zone | | |

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Cutbanks cave |0.50 | |

 | Slope |0.96 | Depth to |0.16 | |

 | Shrink-swell |0.50 | saturated zone | | |

 | | | | | |
256 Soil Survey of

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Slope |0.96 | Slope |0.96

 | Low strength |1.00 | Cutbanks cave |0.50 | |

 | Slope |0.96 | Depth to |0.16 | |

 | | | saturated zone | | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | Too clayey |0.02 | |

 | Shrink-swell |1.00 | | | |

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

801B: | | | | | |

 Orthents------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.19

 | Shrink-swell |0.50 | saturated zone | | saturated zone |

 | Depth to |0.19 | Cutbanks cave |0.10 | |

 | saturated zone | | | | |

 | | | | | |

802B: | | | | | |

 Orthents------------|Very limited | |Somewhat limited | |Not limited |

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Not limited |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | Frost action |0.50 | | | |

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.91 | Slope |0.91 | Slope |0.91

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | Frost action |0.50 | | | |

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Low strength |1.00 | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Frost action |0.50 | | | |

 | | | | | |
Knox County, Illinois 257

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.47 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

901B: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.75

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.75 | | | |

 | saturated zone | | | | |

 | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.75

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.75 | | | |

 | saturated zone | | | | |

 | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

3074A: | | | | | |

 Radford-------------|Very limited | |Very limited | |Very limited |

 | Frost action |1.00 | Depth to |1.00 | Flooding |1.00

 | Flooding |1.00 | saturated zone | | Depth to |0.75

 | Low strength |1.00 | Flooding |0.80 | saturated zone |

 | Depth to |0.75 | Cutbanks cave |0.10 | |

 | saturated zone | | | | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Very limited | |Very limited | |Very limited |

 | Frost action |1.00 | Depth to |1.00 | Flooding |1.00

 | Flooding |1.00 | saturated zone | | Depth to |0.99

 | Low strength |1.00 | Flooding |0.80 | saturated zone |

 | Depth to |0.99 | Cutbanks cave |0.10 | |

 | saturated zone | | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

3415A: | | | | | |

 Orion---------------|Very limited | |Very limited | |Very limited |

 | Frost action |1.00 | Depth to |1.00 | Flooding |1.00

 | Flooding |1.00 | saturated zone | | Depth to |0.75

 | Low strength |1.00 | Cutbanks cave |1.00 | saturated zone |

 | Depth to |0.75 | Flooding |0.80 | |

 | saturated zone | | | | |

 | | | | | |
258 Soil Survey of

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Very limited | |Very limited | |Very limited |

 | Frost action |1.00 | Depth to |1.00 | Flooding |1.00

 | Flooding |1.00 | saturated zone | | Depth to |0.75

 | Low strength |1.00 | Flooding |0.80 | saturated zone |

 | Depth to |0.75 | Cutbanks cave |0.10 | |

 | saturated zone | | | | |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.75

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Depth to |0.75 | Cutbanks cave |0.10 | |

 | saturated zone | | | | |

 | Flooding |0.40 | | | |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.75

 | Depth to |0.75 | saturated zone | | saturated zone |

 | saturated zone | | Cutbanks cave |0.10 | |

 | Shrink-swell |0.50 | | | |

 | Flooding |0.40 | | | |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Flooding |0.60 | Flooding |0.60

 | Flooding |1.00 | Depth to |0.16 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Very limited | |Somewhat limited | |Somewhat limited |

 | Frost action |1.00 | Flooding |0.60 | Flooding |0.60

 | Flooding |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.94

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.94 | | | |

 | saturated zone | | | | |

 | | | | | |

9086B: | | | | | |

 Osco----------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Somewhat limited |

 | Frost action |1.00 | Depth to |1.00 | Depth to |0.94

 | Low strength |1.00 | saturated zone | | saturated zone |

 | Shrink-swell |1.00 | Cutbanks cave |0.10 | |

 | Depth to |0.94 | | | |

 | saturated zone | | | | |

 | | | | | |
Knox County, Illinois 259

Table 14b.--Building Site Development--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Local roads and | Shallow excavations | Lawns and landscaping

 and soil name | streets | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Cutbanks cave |0.10 | |

 | Low strength |1.00 | | | |

 | Shrink-swell |0.50 | | | |

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Very limited | |Somewhat limited | |Not limited |

 | Frost action |1.00 | Depth to |0.15 | |

 | Low strength |1.00 | saturated zone | | |

 | Shrink-swell |0.50 | Cutbanks cave |0.10 | |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
260 Soil Survey of

Table 15a.--Sanitary Facilities

(The information in this table indicates the dominant soil condition but

 does not eliminate the need for onsite investigation. The numbers

 in the value columns range from 0.01 to 1.00. The larger the value,

 the greater the limitation. See text for further explanation of

 ratings in this table)

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

7D3: | | | |

 Atlas---------------|Very limited | |Very limited |

 | Restricted |1.00 | Slope |1.00

 | permeability | | Depth to |1.00

 | Depth to |1.00 | saturated zone |

 | saturated zone | | |

 | Slope |0.96 | |

 | | | |

8D2: | | | |

 Hickory-------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

8F: | | | |

 Hickory-------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

8F2: | | | |

 Hickory-------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

8G: | | | |

 Hickory-------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

17A: | | | |

 Keomah--------------|Very limited | |Very limited |

 | Restricted |1.00 | Depth to |1.00

 | permeability | | saturated zone |

 | Depth to |1.00 | Seepage |0.53

 | saturated zone | | |

 | | | |

19C3: | | | |

 Sylvan--------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | | | |

19D3: | | | |

 Sylvan--------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |
Knox County, Illinois 261

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

43A: | | | |

 Ipava---------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.53

 | permeability | | |

 | | | |

45A: | | | |

 Denny---------------|Very limited | |Very limited |

 | Restricted |1.00 | Ponding |1.00

 | permeability | | Depth to |1.00

 | Ponding |1.00 | saturated zone |

 | Depth to |1.00 | |

 | saturated zone | | |

 | | | |

68A: | | | |

 Sable---------------|Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

86B: | | | |

 Osco----------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

86B2: | | | |

 Osco----------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

86C: | | | |

 Osco----------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

86C2: | | | |

 Osco----------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

86D2: | | | |

 Osco----------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |
262 Soil Survey of

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

119D2: | | | |

 Elco----------------|Very limited | |Very limited |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | Seepage |0.53

 | Restricted |1.00 | Depth to |0.04

 | permeability | | saturated zone |

 | Slope |0.96 | |

 | | | |

119E2: | | | |

 Elco----------------|Very limited | |Very limited |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | Seepage |0.53

 | Slope |1.00 | Depth to |0.04

 | Restricted |1.00 | saturated zone |

 | permeability | | |

 | | | |

131B: | | | |

 Alvin---------------|Very limited | |Very limited |

 | Seepage |1.00 | Seepage |1.00

 | | | Slope |0.18

 | | | |

131D: | | | |

 Alvin---------------|Very limited | |Very limited |

 | Seepage |1.00 | Slope |1.00

 | Slope |0.96 | Seepage |1.00

 | | | |

131F: | | | |

 Alvin---------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Seepage |1.00 | Seepage |1.00

 | | | |

134B: | | | |

 Camden--------------|Very limited | |Very limited |

 | Seepage |1.00 | Seepage |1.00

 | Restricted |0.46 | Slope |0.18

 | permeability | | |

 | | | |

134C2: | | | |

 Camden--------------|Very limited | |Very limited |

 | Seepage |1.00 | Seepage |1.00

 | Restricted |0.46 | Slope |1.00

 | permeability | | |

 | | | |

134D2: | | | |

 Camden--------------|Very limited | |Very limited |

 | Seepage |1.00 | Slope |1.00

 | Slope |0.96 | Seepage |1.00

 | Restricted |0.46 | |

 | permeability | | |

 | | | |

249A: | | | |

 Edinburg------------|Very limited | |Very limited |

 | Restricted |1.00 | Ponding |1.00

 | permeability | | Depth to |1.00

 | Ponding |1.00 | saturated zone |

 | Depth to |1.00 | Seepage |0.53

 | saturated zone | | |

 | | | |
Knox County, Illinois 263

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

257A: | | | |

 Clarksdale----------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.53

 | permeability | | |

 | | | |

259C2: | | | |

 Assumption----------|Very limited | |Very limited |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | Seepage |0.53

 | Restricted |1.00 | Depth to |0.04

 | permeability | | saturated zone |

 | | | |

259D2: | | | |

 Assumption----------|Very limited | |Very limited |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | Seepage |0.53

 | Restricted |1.00 | Depth to |0.04

 | permeability | | saturated zone |

 | Slope |0.96 | |

 | | | |

 | | | |

259D3: | | | |

 Assumption----------|Very limited | |Very limited |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | Seepage |0.53

 | Restricted |1.00 | Depth to |0.04

 | permeability | | saturated zone |

 | Slope |0.96 | |

 | | | |

279B: | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

279C2: | | | |

 Rozetta-------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

280B: | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | | | |

280C2: | | | |

 Fayette-------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | | | |

280D2: | | | |

 Fayette-------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |
264 Soil Survey of

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

280F: | | | |

 Fayette-------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

344B: | | | |

 Harvard-------------|Very limited | |Very limited |

 | Seepage |1.00 | Seepage |1.00

 | Restricted |0.46 | Slope |0.18

 | permeability | | |

 | | | |

536: | | | |

 Dumps---------------|Not rated | |Not rated |

 | | | |

549D2: | | | |

 Marseilles----------|Very limited | |Very limited |

 | Restricted |1.00 | Depth to soft |1.00

 | permeability | | bedrock |

 | Depth to bedrock |1.00 | Slope |1.00

 | Slope |0.96 | |

 | | | |

549F: | | | |

 Marseilles----------|Very limited | |Very limited |

 | Restricted |1.00 | Depth to soft |1.00

 | permeability | | bedrock |

 | Depth to bedrock |1.00 | Slope |1.00

 | Slope |1.00 | |

 | | | |

549G: | | | |

 Marseilles----------|Very limited | |Very limited |

 | Restricted |1.00 | Depth to soft |1.00

 | permeability | | bedrock |

 | Depth to bedrock |1.00 | Slope |1.00

 | Slope |1.00 | |

 | | | |

567B2: | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.43 | |

 | saturated zone | | |

 | | | |

567C2: | | | |

 Elkhart-------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | Depth to |0.43 | |

 | saturated zone | | |

 | | | |

567D2: | | | |

 Elkhart-------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | Depth to |0.43 | |

 | saturated zone | | |

 | | | |
Knox County, Illinois 265

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

567D3: | | | |

 Elkhart-------------|Somewhat limited | |Very limited |

 | Slope |0.96 | Slope |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | Depth to |0.43 | |

 | saturated zone | | |

 | | | |

660C2: | | | |

 Coatsburg-----------|Very limited | |Very limited |

 | Restricted |1.00 | Depth to |1.00

 | permeability | | saturated zone |

 | Depth to |1.00 | Slope |1.00

 | saturated zone | | |

 | | | |

675B: | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

801B: | | | |

 Orthents------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.72 | Slope |0.32

 | permeability | | Seepage |0.28

 | | | |

802B: | | | |

 Orthents------------|Very limited | |Somewhat limited |

 | Restricted |1.00 | Slope |0.32

 | permeability | | |

 | | | |

863, 864, 865: | | | |

 Pits----------------|Not rated | |Not rated |

 | | | |

871B: | | | |

 Lenzburg------------|Very limited | |Somewhat limited |

 | Restricted |1.00 | Slope |0.32

 | permeability | | |

 | | | |

871D: | | | |

 Lenzburg------------|Very limited | |Very limited |

 | Restricted |1.00 | Slope |1.00

 | permeability | | |

 | Slope |0.91 | |

 | | | |

871G: | | | |

 Lenzburg------------|Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00

 | Restricted |1.00 | |

 | permeability | | |

 | | | |

872B: | | | |

 Rapatee-------------|Very limited | |Somewhat limited |

 | Restricted |1.00 | Slope |0.18

 | permeability | | |

 | Depth to |0.94 | |

 | saturated zone | | |

 | | | |
266 Soil Survey of

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

901B: | | | |

 Ipava---------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.53

 | permeability | | |

 | | | |

 Osco----------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

902A: | | | |

 Ipava---------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.53

 | permeability | | |

 | | | |

 Sable---------------|Very limited | |Very limited |

 | Ponding |1.00 | Ponding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

3074A: | | | |

 Radford-------------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

3107+: | | | |

 Sawmill-------------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

3415A: | | | |

 Orion---------------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

3451A: | | | |

 Lawson--------------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |
Knox County, Illinois 267

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

7081B: | | | |

 Littleton-----------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Flooding |0.40

 | Flooding |0.40 | |

 | | | |

7104A: | | | |

 Virgil--------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Seepage |1.00 | Seepage |1.00

 | Restricted |0.46 | Flooding |0.40

 | permeability | | |

 | Flooding |0.40 | |

 | | | |

8077A: | | | |

 Huntsville----------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | Depth to |0.43 | |

 | saturated zone | | |

 | | | |

8239A: | | | |

 Dorchester----------|Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00

 | Restricted |0.46 | Seepage |0.53

 | permeability | | |

 | | | |

9017A: | | | |

 Keomah--------------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.08

 | permeability | | |

 | | | |

9086B: | | | |

 Osco----------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

9257A: | | | |

 Clarksdale----------|Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone |

 | Restricted |1.00 | Seepage |0.08

 | permeability | | |

 | | | |

9279B: | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |
268 Soil Survey of

Table 15a.--Sanitary Facilities--Continued

_________________________________________________________________________

 | |

 Map symbol | Septic tank | Sewage lagoons

 and soil name | absorption fields | ___________________________________________________

 | Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | _________________________________________________________________________

 | | | |

9279C2: | | | |

 Rozetta-------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

9280B: | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | | | |

9280C2: | | | |

 Fayette-------------|Somewhat limited | |Very limited |

 | Restricted |0.46 | Slope |1.00

 | permeability | | Seepage |0.53

 | | | |

9675B: | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited |

 | Restricted |0.46 | Seepage |0.53

 | permeability | | Slope |0.18

 | Depth to |0.40 | |

 | saturated zone | | |

 | | | |

M-W. | | | |

 Miscellaneous water | | | |

 | | | |

W. | | | |

 Water | | | |

 | | | | _________________________________________________________________________
Knox County, Illinois 269

Table 15b.--Sanitary Facilities

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |1.00 | Slope |0.96 | Too clayey |1.00

 | Slope |0.96 | | | Hard to compact |1.00

 | | | | | Slope |0.96

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

8F: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

17A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | | | | | Too clayey |0.50

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | | | | | |

43A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Hard to compact |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Too clayey |0.50 | | | saturated zone |

 | | | | | Too clayey |0.50

 | | | | | |

45A: | | | | | |

 Denny---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Ponding |1.00

 | saturated zone | | Depth to |1.00 | Depth to |1.00

 | Ponding |1.00 | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Hard to compact |1.00

 | | | | | Too clayey |0.50

 | | | | | |
270 Soil Survey of

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Ponding |1.00

 | saturated zone | | Depth to |1.00 | Depth to |1.00

 | Ponding |1.00 | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

86B: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

86B2: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

86C: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

86C2: | | | | | |

 Osco----------------|Very limited | |Very limited | |Not limited |

 | Depth to |1.00 | Depth to |1.00 | |

 | saturated zone | | saturated zone | | |

 | | | | | |

86D2: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Slope |0.96

 | saturated zone | | saturated zone | | Too clayey |0.50

 | Slope |0.96 | Slope |0.96 | |

 | Too clayey |0.50 | | | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Depth to |0.68 | Depth to |0.04 | Too clayey |0.50

 | saturated zone | | saturated zone | | Depth to |0.24

 | Too clayey |0.50 | | | saturated zone |

 | | | | | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Depth to |0.68 | Depth to |0.04 | Too clayey |0.50

 | saturated zone | | saturated zone | | Depth to |0.24

 | Too clayey |0.50 | | | saturated zone |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Somewhat limited |

 | Seepage |1.00 | Seepage |1.00 | Seepage |0.52

 | | | | | |

131D: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Somewhat limited |

 | Seepage |1.00 | Seepage |1.00 | Slope |0.96

 | Slope |0.96 | Slope |0.96 | Seepage |0.52

 | | | | | |
Knox County, Illinois 271

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Seepage |1.00 | Seepage |1.00 | Seepage |0.52

 | | | | | |

134B: | | | | | |

 Camden--------------|Very limited | |Not limited | |Somewhat limited |

 | Seepage |1.00 | | | Too clayey |0.50

 | | | | | Seepage |0.22

 | | | | | |

134C2: | | | | | |

 Camden--------------|Very limited | |Not limited | |Somewhat limited |

 | Seepage |1.00 | | | Too sandy |0.50

 | Too sandy |0.50 | | | Too clayey |0.50

 | | | | | Seepage |0.22

 | | | | | |

134D2: | | | | | |

 Camden--------------|Very limited | |Somewhat limited | |Somewhat limited |

 | Seepage |1.00 | Slope |0.96 | Slope |0.96

 | Slope |0.96 | | | Too clayey |0.50

 | | | | | Seepage |0.22

 | | | | | |

249A: | | | | | |

 Edinburg------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Ponding |1.00

 | saturated zone | | Depth to |1.00 | Depth to |1.00

 | Ponding |1.00 | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Hard to compact |1.00

 | | | | | Too clayey |0.50

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Hard to compact |1.00

 | | | | | Too clayey |0.50

 | | | | | |

259C2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Depth to |0.68 | Depth to |0.04 | Too clayey |0.50

 | saturated zone | | saturated zone | | Depth to |0.24

 | Too clayey |0.50 | | | saturated zone |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Depth to |0.68 | Depth to |0.04 | Too clayey |0.50

 | saturated zone | | saturated zone | | Depth to |0.24

 | Too clayey |0.50 | | | saturated zone |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Depth to |0.68 | Depth to |0.04 | Too clayey |0.50

 | saturated zone | | saturated zone | | Depth to |0.24

 | Too clayey |0.50 | | | saturated zone |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |
272 Soil Survey of

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

344B: | | | | | |

 Harvard-------------|Very limited | |Not limited | |Somewhat limited |

 | Seepage |1.00 | | | Too clayey |0.50

 | Too clayey |0.50 | | | |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Depth to bedrock |1.00 | Depth to bedrock |1.00 | Depth to bedrock |1.00

 | Slope |0.96 | Slope |0.96 | Slope |0.96

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Depth to bedrock |1.00

 | Depth to bedrock |1.00 | Depth to bedrock |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Depth to bedrock |1.00

 | Depth to bedrock |1.00 | Depth to bedrock |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Not limited |

 | Depth to |1.00 | Depth to |1.00 | |

 | saturated zone | | saturated zone | | |

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Not limited |

 | Depth to |1.00 | Depth to |1.00 | |

 | saturated zone | | saturated zone | | |

 | | | | | |
Knox County, Illinois 273

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Slope |0.96

 | saturated zone | | saturated zone | | |

 | Slope |0.96 | Slope |0.96 | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Slope |0.96

 | saturated zone | | saturated zone | | |

 | Slope |0.96 | Slope |0.96 | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |1.00 | | | Too clayey |1.00

 | | | | | Hard to compact |1.00

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

801B: | | | | | |

 Orthents------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |0.86

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

802B: | | | | | |

 Orthents------------|Not limited | |Not limited | |Not limited |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Not limited | |Not limited | |Not limited |

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Somewhat limited |

 | Slope |0.91 | Slope |0.91 | Slope |0.91

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Slope |1.00 | Slope |1.00

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | Gravel content |0.02

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |
274 Soil Survey of

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

901B: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Hard to compact |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Too clayey |0.50 | | | saturated zone |

 | | | | | Too clayey |0.50

 | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Hard to compact |1.00

 | saturated zone | | saturated zone | | Depth to |1.00

 | Too clayey |0.50 | | | saturated zone |

 | | | | | Too clayey |0.50

 | | | | | |

 Sable---------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Ponding |1.00 | Ponding |1.00

 | saturated zone | | Depth to |1.00 | Depth to |1.00

 | Ponding |1.00 | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

3074A: | | | | | |

 Radford-------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Depth to |1.00

 | Depth to |1.00 | Depth to |1.00 | saturated zone |

 | saturated zone | | saturated zone | | Too clayey |0.50

 | Too clayey |0.50 | | | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Depth to |1.00

 | Depth to |1.00 | Depth to |1.00 | saturated zone |

 | saturated zone | | saturated zone | | Too clayey |0.50

 | Too clayey |0.50 | | | |

 | | | | | |

3415A: | | | | | |

 Orion---------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Depth to |1.00

 | Depth to |1.00 | Depth to |1.00 | saturated zone |

 | saturated zone | | saturated zone | | |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Very limited | |Very limited | |Very limited |

 | Flooding |1.00 | Flooding |1.00 | Depth to |1.00

 | Depth to |1.00 | Depth to |1.00 | saturated zone |

 | saturated zone | | saturated zone | | |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Flooding |0.40 | Flooding |0.40 | |

 | | | | | |
Knox County, Illinois 275

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Seepage |1.00 | Flooding |0.40 | Too clayey |0.50

 | Too clayey |0.50 | | | |

 | Flooding |0.40 | | | |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Very limited | |Very limited | |Not limited |

 | Flooding |1.00 | Flooding |1.00 | |

 | Depth to |1.00 | Depth to |1.00 | |

 | saturated zone | | saturated zone | | |

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Very limited | |Very limited | |Not limited |

 | Flooding |1.00 | Flooding |1.00 | |

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Hard to compact |1.00

 | | | | | Too clayey |0.50

 | | | | | |

9086B: | | | | | |

 Osco----------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Very limited | |Very limited | |Very limited |

 | Depth to |1.00 | Depth to |1.00 | Depth to |1.00

 | saturated zone | | saturated zone | | saturated zone |

 | Too clayey |0.50 | | | Hard to compact |1.00

 | | | | | Too clayey |0.50

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Not limited | |Somewhat limited |

 | Too clayey |0.50 | | | Too clayey |0.50

 | | | | | |
276 Soil Survey of

Table 15b.--Sanitary Facilities--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Trench sanitary | Area sanitary | Daily cover for

 and soil name | landfill | landfill | landfill _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Very limited | |Very limited | |Somewhat limited |

 | Depth to |1.00 | Depth to |1.00 | Too clayey |0.50

 | saturated zone | | saturated zone | | |

 | Too clayey |0.50 | | | |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 277

Table 16a.--Construction Materials

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.00 to 0.99. The

 smaller the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Poor | |Poor | |Poor |

 | Too clayey |0.00 | Low strength |0.00 | Too clayey |0.00

 | Low content of |0.50 | Depth to |0.04 | Depth to |0.04

 | organic matter | | saturated zone | | saturated zone |

 | Too acid |0.88 | Shrink-swell |0.12 | Slope |0.04

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.94 | Too clayey |0.57

 | Too acid |0.88 | | | Rock fragments |0.88

 | Too clayey |0.98 | | | |

 | | | | | |

8F: | | | | | |

 Hickory-------------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Slope |0.00 | Slope |0.00

 | organic matter | | Low strength |0.00 | Too clayey |0.57

 | Too acid |0.88 | Shrink-swell |0.94 | Rock fragments |0.88

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Slope |0.00 | Slope |0.00

 | organic matter | | Low strength |0.00 | Too clayey |0.57

 | Too acid |0.88 | Shrink-swell |0.98 | Rock fragments |0.88

 | Too clayey |0.98 | | | |

 | | | | | |

8G: | | | | | |

 Hickory-------------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Slope |0.00 | Slope |0.00

 | organic matter | | Low strength |0.00 | Too clayey |0.57

 | Too acid |0.68 | Shrink-swell |0.99 | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

17A: | | | | | |

 Keomah--------------|Fair | |Poor | |Fair |

 | Low content of |0.02 | Low strength |0.00 | Depth to |0.04

 | organic matter | | Depth to |0.04 | saturated zone |

 | Too clayey |0.08 | saturated zone | | Too clayey |0.05

 | Water erosion |0.68 | Shrink-swell |0.89 | |

 | Too acid |0.74 | | | |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | Shrink-swell |0.99 | |

 | Water erosion |0.68 | | | |

 | Carbonate content|0.97 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |
278 Soil Survey of

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Slope |0.04

 | organic matter | | | | Too clayey |0.57

 | Water erosion |0.68 | | | |

 | Carbonate content|0.97 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

43A: | | | | | |

 Ipava---------------|Fair | |Poor | |Fair |

 | Water erosion |0.99 | Low strength |0.00 | Depth to |0.14

 | | | Depth to |0.14 | saturated zone |

 | | | saturated zone | | |

 | | | Shrink-swell |0.59 | |

 | | | | | |

45A: | | | | | |

 Denny---------------|Fair | |Poor | |Poor |

 | Too clayey |0.02 | Depth to |0.00 | Depth to |0.00

 | Low content of |0.50 | saturated zone | | saturated zone |

 | organic matter | | Low strength |0.00 | Too clayey |0.01

 | Water erosion |0.90 | Shrink-swell |0.74 | |

 | Too acid |0.95 | | | |

 | | | | | |

68A: | | | | | |

 Sable---------------|Fair | |Poor | |Poor |

 | Low content of |0.68 | Depth to |0.00 | Depth to |0.00

 | organic matter | | saturated zone | | saturated zone |

 | Too clayey |0.98 | Low strength |0.00 | Too clayey |0.98

 | Water erosion |0.99 | Shrink-swell |0.87 | |

 | | | | | |

86B: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

86B2: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.99 | |

 | Too acid |0.54 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

86C: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

86C2: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Water erosion |0.68 | | | |

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |
Knox County, Illinois 279

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

86D2: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.87 | Too clayey |0.64

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Fair | |Poor | |Fair |

 | Low content of |0.02 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.38 | Too clayey |0.57

 | Water erosion |0.90 | Depth to |0.98 | Depth to |0.98

 | Too clayey |0.98 | saturated zone | | saturated zone |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Fair | |Poor | |Poor |

 | Low content of |0.02 | Low strength |0.00 | Slope |0.00

 | organic matter | | Slope |0.18 | Too clayey |0.57

 | Water erosion |0.68 | Shrink-swell |0.45 | Depth to |0.98

 | Too clayey |0.98 | Depth to |0.98 | saturated zone |

 | | | saturated zone | | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Fair | |Good | |Good |

 | Low content of |0.12 | | | |

 | organic matter | | | | |

 | Too acid |0.88 | | | |

 | | | | | |

131D: | | | | | |

 Alvin---------------|Fair | |Good | |Fair |

 | Low content of |0.12 | | | Slope |0.04

 | organic matter | | | | |

 | Too acid |0.88 | | | |

 | | | | | |

131F: | | | | | |

 Alvin---------------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Slope |0.00 | Slope |0.00

 | organic matter | | | | |

 | Too acid |0.88 | | | |

 | | | | | |

134B: | | | | | |

 Camden--------------|Fair | |Good | |Fair |

 | Low content of |0.12 | | | Too clayey |0.49

 | organic matter | | | | |

 | Too clayey |0.82 | | | |

 | Water erosion |0.90 | | | |

 | Too acid |0.97 | | | |

 | | | | | |

134C2: | | | | | |

 Camden--------------|Fair | |Good | |Fair |

 | Low content of |0.12 | | | Too clayey |0.49

 | organic matter | | | | |

 | Too clayey |0.82 | | | |

 | Water erosion |0.90 | | | |

 | Too acid |0.97 | | | |

 | | | | | |
280 Soil Survey of

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

134D2: | | | | | |

 Camden--------------|Fair | |Good | |Fair |

 | Low content of |0.12 | | | Slope |0.04

 | organic matter | | | | Too clayey |0.49

 | Too clayey |0.82 | | | |

 | Water erosion |0.90 | | | |

 | Too acid |0.97 | | | |

 | | | | | |

249A: | | | | | |

 Edinburg------------|Fair | |Poor | |Poor |

 | Too clayey |0.02 | Depth to |0.00 | Depth to |0.00

 | Low content of |0.68 | saturated zone | | saturated zone |

 | organic matter | | Low strength |0.00 | Too clayey |0.01

 | Water erosion |0.99 | Shrink-swell |0.17 | |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Fair | |Poor | |Fair |

 | Too clayey |0.02 | Low strength |0.00 | Too clayey |0.01

 | Low content of |0.12 | Depth to |0.04 | Depth to |0.04

 | organic matter | | saturated zone | | saturated zone |

 | Water erosion |0.90 | Shrink-swell |0.50 | |

 | Too acid |0.97 | | | |

 | | | | | |

259C2: | | | | | |

 Assumption----------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.31 | Depth to |0.98

 | Too acid |0.97 | Depth to |0.98 | saturated zone |

 | Too clayey |0.98 | saturated zone | | |

 | Water erosion |0.99 | | | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.38 | Too clayey |0.64

 | Too acid |0.97 | Depth to |0.98 | Depth to |0.98

 | Too clayey |0.98 | saturated zone | | saturated zone |

 | Water erosion |0.99 | | | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.40 | Too clayey |0.64

 | Too acid |0.97 | Depth to |0.98 | Depth to |0.98

 | Too clayey |0.98 | saturated zone | | saturated zone |

 | Water erosion |0.99 | | | |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | Shrink-swell |0.92 | |

 | Water erosion |0.68 | | | |

 | Too acid |0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |
Knox County, Illinois 281

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Fair | |Poor | |Fair |

 | Low content of |0.24 | Low strength |0.00 | Too clayey |0.60

 | organic matter | | Shrink-swell |0.90 | |

 | Too acid |0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Water erosion |0.68 | | | |

 | Too acid |0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Slope |0.04

 | organic matter | | Shrink-swell |0.87 | Too clayey |0.57

 | Too acid |0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

280F: | | | | | |

 Fayette-------------|Fair | |Poor | |Poor |

 | Low content of |0.50 | Low strength |0.00 | Slope |0.00

 | organic matter | | Slope |0.00 | Too clayey |0.64

 | Water erosion |0.68 | Shrink-swell |0.87 | |

 | Too acid |0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

344B: | | | | | |

 Harvard-------------|Fair | |Fair | |Fair |

 | Low content of |0.12 | Shrink-swell |0.99 | Too clayey |0.57

 | organic matter | | | | |

 | Water erosion |0.90 | | | |

 | Too acid |0.97 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Depth to bedrock |0.00 | Slope |0.04

 | organic matter | | Low strength |0.00 | Depth to bedrock |0.29

 | Depth to bedrock |0.29 | Shrink-swell |0.87 | Too clayey |0.39

 | Too acid |0.50 | | | Too acid |0.88

 | Droughty |0.50 | | | |

 | Too clayey |0.68 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |
282 Soil Survey of

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

549F: | | | | | |

 Marseilles----------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Depth to bedrock |0.00 | Slope |0.00

 | organic matter | | Low strength |0.00 | Too clayey |0.39

 | Too acid |0.50 | Slope |0.00 | Too acid |0.88

 | Too clayey |0.68 | Shrink-swell |0.87 | Depth to bedrock |0.90

 | Depth to bedrock |0.90 | | | |

 | Droughty |0.99 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

549G: | | | | | |

 Marseilles----------|Fair | |Poor | |Poor |

 | Low content of |0.12 | Depth to bedrock |0.00 | Slope |0.00

 | organic matter | | Slope |0.00 | Too clayey |0.39

 | Too acid |0.50 | Low strength |0.00 | Too acid |0.88

 | Too clayey |0.68 | Shrink-swell |0.87 | Depth to bedrock |0.90

 | Depth to bedrock |0.90 | | | |

 | Droughty |0.99 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Fair | |Poor | |Fair |

 | Low content of |0.01 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | | | |

 | Carbonate content|0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Fair | |Poor | |Fair |

 | Low content of |0.01 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | | | |

 | Water erosion |0.68 | | | |

 | Carbonate content|0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Fair | |Poor | |Fair |

 | Low content of |0.01 | Low strength |0.00 | Slope |0.04

 | organic matter | | | | Too clayey |0.57

 | Water erosion |0.68 | | | |

 | Carbonate content|0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Fair | |Poor | |Fair |

 | Low content of |0.01 | Low strength |0.00 | Slope |0.04

 | organic matter | | | | Carbonate content|0.68

 | Water erosion |0.68 | | | |

 | Carbonate content|0.68 | | | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Poor | |Poor | |Poor |

 | Too clayey |0.00 | Depth to |0.00 | Depth to |0.00

 | Low content of |0.50 | saturated zone | | saturated zone |

 | organic matter | | Low strength |0.00 | Too clayey |0.00

 | Too acid |0.84 | Shrink-swell |0.12 | |

 | | | | | |
Knox County, Illinois 283

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Fair | |Poor | |Fair |

 | Low content of |0.88 | Low strength |0.00 | Too clayey |0.70

 | organic matter | | Shrink-swell |0.91 | |

 | Too acid |0.97 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

801B: | | | | | |

 Orthents------------|Fair | |Poor | |Fair |

 | Low content of |0.68 | Low strength |0.00 | Depth to |0.53

 | organic matter | | Depth to |0.53 | saturated zone |

 | Water erosion |0.90 | saturated zone | | Too clayey |0.67

 | Too clayey |0.98 | Shrink-swell |0.87 | |

 | | | | | |

802B: | | | | | |

 Orthents------------|Fair | |Poor | |Good |

 | Low content of |0.68 | Low strength |0.00 | |

 | organic matter | | Shrink-swell |0.87 | |

 | Water erosion |0.90 | | | |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Fair | |Fair | |Fair |

 | Low content of |0.24 | Shrink-swell |0.87 | Rock fragments |0.04

 | organic matter | | | | Hard to reclaim |0.99

 | Water erosion |0.99 | | | (rock fragments)|

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Fair | |Fair | |Fair |

 | Low content of |0.24 | Shrink-swell |0.87 | Rock fragments |0.04

 | organic matter | | | | Slope |0.09

 | Water erosion |0.99 | | | Hard to reclaim |0.99

 | | | | | (rock fragments)|

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Fair | |Poor | |Poor |

 | Low content of |0.68 | Slope |0.00 | Slope |0.00

 | organic matter | | Low strength |0.00 | Rock fragments |0.04

 | Water erosion |0.99 | Shrink-swell |0.87 | Hard to reclaim |0.74

 | | | | | (rock fragments)|

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Fair | |Poor | |Poor |

 | Low content of |0.75 | Low strength |0.00 | Hard to reclaim |0.00

 | organic matter | | Shrink-swell |0.96 | (dense layer) |

 | Too clayey |0.98 | | | Too clayey |0.68

 | Water erosion |0.99 | | | |

 | | | | | |

901B: | | | | | |

 Ipava---------------|Fair | |Poor | |Fair |

 | Water erosion |0.99 | Low strength |0.00 | Depth to |0.14

 | | | Depth to |0.14 | saturated zone |

 | | | saturated zone | | |

 | | | Shrink-swell |0.59 | |

 | | | | | |
284 Soil Survey of

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

901B: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Fair | |Poor | |Fair |

 | Water erosion |0.99 | Low strength |0.00 | Depth to |0.14

 | | | Depth to |0.14 | saturated zone |

 | | | saturated zone | | |

 | | | Shrink-swell |0.59 | |

 | | | | | |

 Sable---------------|Fair | |Poor | |Poor |

 | Low content of |0.68 | Depth to |0.00 | Depth to |0.00

 | organic matter | | saturated zone | | saturated zone |

 | Too clayey |0.98 | Low strength |0.00 | Too clayey |0.98

 | Water erosion |0.99 | Shrink-swell |0.87 | |

 | | | | | |

3074A: | | | | | |

 Radford-------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Depth to |0.14

 | organic matter | | Depth to |0.14 | saturated zone |

 | Water erosion |0.68 | saturated zone | | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Fair | |Poor | |Poor |

 | Too clayey |0.98 | Low strength |0.00 | Depth to |0.00

 | | | Depth to |0.00 | saturated zone |

 | | | saturated zone | | Too clayey |0.93

 | | | Shrink-swell |0.89 | |

 | | | | | |

3415A: | | | | | |

 Orion---------------|Fair | |Poor | |Fair |

 | Water erosion |0.37 | Low strength |0.00 | Depth to |0.14

 | | | Depth to |0.14 | saturated zone |

 | | | saturated zone | | |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Depth to |0.14

 | organic matter | | Depth to |0.14 | saturated zone |

 | Water erosion |0.68 | saturated zone | | |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Depth to |0.14

 | organic matter | | Depth to |0.14 | saturated zone |

 | Water erosion |0.68 | saturated zone | | |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Fair | |Fair | |Fair |

 | Low content of |0.68 | Depth to |0.14 | Depth to |0.14

 | organic matter | | saturated zone | | saturated zone |

 | Water erosion |0.90 | Shrink-swell |0.97 | Too clayey |0.67

 | Too acid |0.97 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |
Knox County, Illinois 285

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Good | |Fair | |Good |

 | | | Shrink-swell |0.93 | |

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Fair | |Poor | |Good |

 | Carbonate content|0.97 | Low strength |0.00 | |

 | Water erosion |0.99 | Shrink-swell |0.87 | |

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Fair | |Poor | |Fair |

 | Too clayey |0.02 | Low strength |0.00 | Too clayey |0.01

 | Low content of |0.12 | Depth to |0.04 | Depth to |0.04

 | organic matter | | saturated zone | | saturated zone |

 | Too acid |0.54 | Shrink-swell |0.46 | Too acid |0.98

 | Water erosion |0.68 | | | |

 | | | | | |

9086B: | | | | | |

 Osco----------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.84 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Fair | |Poor | |Fair |

 | Too clayey |0.02 | Low strength |0.00 | Too clayey |0.01

 | Low content of |0.12 | Depth to |0.04 | Depth to |0.04

 | organic matter | | saturated zone | | saturated zone |

 | Too acid |0.84 | Shrink-swell |0.52 | |

 | Water erosion |0.90 | | | |

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Fair | |Poor | |Fair |

 | Low content of |0.24 | Low strength |0.00 | Too clayey |0.60

 | organic matter | | Shrink-swell |0.87 | Too acid |0.98

 | Too acid |0.54 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Fair | |Poor | |Fair |

 | Low content of |0.24 | Low strength |0.00 | Too clayey |0.60

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Fair | |Poor | |Fair |

 | Low content of |0.50 | Low strength |0.00 | Too clayey |0.64

 | organic matter | | Shrink-swell |0.87 | |

 | Water erosion |0.68 | | | |

 | Too acid |0.68 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |
286 Soil Survey of

Table 16a.--Construction Materials--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Potential as source of | Potential as source | Potential as source

 and soil name | reclamation material | of roadfill | of topsoil _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Fair | |Poor | |Fair |

 | Low content of |0.12 | Low strength |0.00 | Too clayey |0.57

 | organic matter | | Shrink-swell |0.87 | |

 | Too acid |0.68 | | | |

 | Water erosion |0.90 | | | |

 | Too clayey |0.98 | | | |

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Fair | |Poor | |Fair |

 | Low content of |0.88 | Low strength |0.00 | Too clayey |0.70

 | organic matter | | Shrink-swell |0.91 | |

 | Too acid |0.97 | | | |

 | Too clayey |0.98 | | | |

 | Water erosion |0.99 | | | |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 287

Table 16b.--Construction Materials

(The information in this table indicates the

 dominant soil condition but does not

 eliminate the need for onsite

 investigation. Only those soils with a

 fair or good rating are listed. The

 ratings given for the thickest layer are

 for the thickest layer above and excluding

 the bottom layer. The numbers in the value

 columns range from 0.00 to 0.99. The

 greater the value, the greater the

 likelihood that the bottom layer or

 thickest layer of the soil is a source of

 sand. See text for further explanation of

 ratings in this table)

_______________________________________________

 |

 Map symbol | Potential as source

 and soil name | of sand _________________________

 | Rating class |Value _______________________________________________

 | |

131B: | |

 Alvin---------------|Fair |

 | Thickest layer |0.05

 | Bottom layer |0.11

 | |

131D: | |

 Alvin---------------|Fair |

 | Thickest layer |0.05

 | Bottom layer |0.11

 | |

131F: | |

 Alvin---------------|Fair |

 | Thickest layer |0.05

 | Bottom layer |0.11

 | |

134B: | |

 Camden--------------|Fair |

 | Thickest layer |0.00

 | Bottom layer |0.08

 | |

134C2: | |

 Camden--------------|Fair |

 | Thickest layer |0.00

 | Bottom layer |0.08

 | |

134D2: | |

 Camden--------------|Fair |

 | Thickest layer |0.00

 | Bottom layer |0.08

 | | _______________________________________________
288 Soil Survey of

Table 17a.--Water Management

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Somewhat limited | |Very limited | |Very limited |

 | Slope |0.02 | Depth to |1.00 | Slow refill |1.00

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Hard to pack |0.89 | |

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.01 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

8F: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.05 | Depth to water |1.00

 | Slope |0.36 | | | |

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.17 | Depth to water |1.00

 | Slope |0.36 | | | |

 | | | | | |

8G: | | | | | |

 Hickory-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.99 | Piping |0.27 | Depth to water |1.00

 | Seepage |0.72 | | | |

 | | | | | |

17A: | | | | | |

 Keomah--------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.30 | |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Somewhat limited | |Not limited | |Very limited |

 | Seepage |0.72 | | | Depth to water |1.00

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.06 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

43A: | | | | | |

 Ipava---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | | | |

45A: | | | | | |

 Denny---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.04 | Ponding |1.00 | Slow refill |0.28

 | | | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | |

 | | | Piping |0.14 | |

 | | | | | |
Knox County, Illinois 289

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

68A: | | | | | |

 Sable---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Ponding |1.00 | |

 | | | | | |

86B: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | | | | | |

86B2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.21 | Depth to water |1.00

 | | | | | |

86C: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | | | | | |

86C2: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.01 | Depth to water |1.00

 | | | | | |

86D2: | | | | | |

 Osco----------------|Somewhat limited | |Not limited | |Very limited |

 | Seepage |0.72 | | | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Depth to |0.68 | Depth to water |1.00

 | Slope |0.02 | saturated zone | | |

 | | | Piping |0.02 | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Depth to |0.68 | Depth to water |1.00

 | Slope |0.18 | saturated zone | | |

 | | | Piping |0.05 | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Very limited | |Somewhat limited | |Very limited |

 | Seepage |1.00 | Seepage |0.11 | Depth to water |1.00

 | | | | | |

131D: | | | | | |

 Alvin---------------|Very limited | |Somewhat limited | |Very limited |

 | Seepage |1.00 | Seepage |0.11 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Somewhat limited | |Very limited |

 | Seepage |1.00 | Seepage |0.11 | Depth to water |1.00

 | Slope |0.36 | | | |

 | | | | | |

134B: | | | | | |

 Camden--------------|Very limited | |Somewhat limited | |Very limited |

 | Seepage |1.00 | Piping |0.98 | Depth to water |1.00

 | | | Seepage |0.08 | |

 | | | | | |
290 Soil Survey of

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

134C2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Very limited |

 | Seepage |1.00 | Piping |1.00 | Depth to water |1.00

 | | | Seepage |0.08 | |

 | | | | | |

134D2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Very limited |

 | Seepage |1.00 | Piping |1.00 | Depth to water |1.00

 | Slope |0.02 | Seepage |0.08 | |

 | | | | | |

249A: | | | | | |

 Edinburg------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.54 | Ponding |1.00 | Slow refill |0.28

 | | | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | |

 | | | Hard to pack |0.47 | |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | | | |

259C2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Depth to |0.68 | Depth to water |1.00

 | | | saturated zone | | |

 | | | Piping |0.01 | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Depth to |0.68 | Depth to water |1.00

 | Slope |0.02 | saturated zone | | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Depth to |0.68 | Depth to water |1.00

 | Slope |0.02 | saturated zone | | |

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.01 | Depth to water |1.00

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.01 | Depth to water |1.00

 | | | | | |

280B: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.21 | Depth to water |1.00

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |
Knox County, Illinois 291

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

280F: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.17 | Depth to water |1.00

 | Slope |0.34 | | | |

 | | | | | |

344B: | | | | | |

 Harvard-------------|Very limited | |Somewhat limited | |Very limited |

 | Seepage |1.00 | Piping |0.82 | Depth to water |1.00

 | | | Seepage |0.05 | |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Depth to bedrock |0.19 | Thin layer |0.93 | Depth to water |1.00

 | Slope |0.02 | Hard to pack |0.01 | |

 | | | | | |

549F: | | | | | |

 Marseilles----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.36 | Thin layer |0.70 | Depth to water |1.00

 | Depth to bedrock |0.04 | | | |

 | | | | | |

549G: | | | | | |

 Marseilles----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Slope |0.99 | Thin layer |0.70 | Depth to water |1.00

 | Depth to bedrock |0.04 | | | |

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.02 | Depth to water |1.00

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.24 | Depth to water |1.00

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.19 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.13 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Not limited | |Very limited | |Very limited |

 | | | Depth to |1.00 | Depth to water |1.00

 | | | saturated zone | | |

 | | | Hard to pack |1.00 | |

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.17 | Depth to water |1.00

 | | | | | |

801B: | | | | | |

 Orthents------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.54 | Depth to |1.00 | Slow refill |0.46

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.50 | Depth to water |0.01

 | | | | | |
292 Soil Survey of

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

802B: | | | | | |

 Orthents------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.04 | Piping |0.50 | Depth to water |1.00

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.04 | Piping |0.02 | Depth to water |1.00

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.04 | Piping |0.02 | Depth to water |1.00

 | Slope |0.02 | | | |

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Not limited | |Very limited |

 | Slope |1.00 | | | Depth to water |1.00

 | Seepage |0.04 | | | |

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Somewhat limited | |Not limited | |Very limited |

 | Seepage |0.02 | | | Depth to water |1.00

 | | | | | |

901B: | | | | | |

 Ipava---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | | | | | |

902A: | | | | | |

 Ipava---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | | | |

 Sable---------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Ponding |1.00 | Slow refill |0.28

 | | | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | |

 | | | | | |

3074A: | | | | | |

 Radford-------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.40 | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.02 | |

 | | | | | |
Knox County, Illinois 293

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

3415A: | | | | | |

 Orion---------------|Somewhat limited | |Very limited | |Very limited |

 | Seepage |0.72 | Depth to |1.00 | Cutbanks cave |1.00

 | | | saturated zone | | Slow refill |0.28

 | | | Piping |1.00 | |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.75 | |

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.72 | Depth to |1.00 | Slow refill |0.28

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Piping |0.82 | |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Very limited | |Very limited | |Somewhat limited |

 | Seepage |1.00 | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | |

 | | | Piping |0.13 | |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.66 | Depth to water |1.00

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.64 | Depth to water |1.00

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.30 | Depth to |1.00 | Slow refill |0.70

 | | | saturated zone | | |

 | | | | | Cutbanks cave |0.10

 | | | | | |

9086B: | | | | | |

 Osco----------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.01 | Depth to water |1.00

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Seepage |0.30 | Depth to |1.00 | Slow refill |0.70

 | | | saturated zone | | Cutbanks cave |0.10

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Not limited | |Very limited |

 | Seepage |0.72 | | | Depth to water |1.00

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Not limited | |Very limited |

 | Seepage |0.72 | | | Depth to water |1.00

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.21 | Depth to water |1.00

 | | | | | |
294 Soil Survey of

Table 17a.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Pond reservoir areas | Embankments, dikes, and | Aquifer-fed

 and soil name | | levees | excavated ponds _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.03 | Depth to water |1.00

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Somewhat limited | |Very limited |

 | Seepage |0.72 | Piping |0.05 | Depth to water |1.00

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Knox County, Illinois 295

Table 17b.--Water Management

(The information in this table indicates the dominant soil condition but does not eliminate the

 need for onsite investigation. The numbers in the value columns range from 0.01 to 1.00. The

 larger the value, the greater the limitation. See text for further explanation of ratings in

 this table)

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7D3: | | | | | |

 Atlas---------------|Very limited | |Very limited | |Somewhat limited |

 | Slope |1.00 | Slope |1.00 | Slope |0.96

 | | | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | Too clayey |0.02

 | | | Erosion hazard |0.56 | |

 | | | | | |

8D2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Slope |1.00 | |

 | | | Erosion hazard |0.89 | |

 | | | | | |

8F: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

8F2: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Slope |1.00 | |

 | | | Erosion hazard |0.89 | |

 | | | | | |

8G: | | | | | |

 Hickory-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

17A: | | | | | |

 Keomah--------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

19C3: | | | | | |

 Sylvan--------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

19D3: | | | | | |

 Sylvan--------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

43A: | | | | | |

 Ipava---------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |
296 Soil Survey of

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

45A: | | | | | |

 Denny---------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Ponding |1.00

 | | | Ponding |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

68A: | | | | | |

 Sable---------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Ponding |1.00

 | | | Ponding |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

86B: | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

86B2: | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

86C: | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

86C2: | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

86D2: | | | | | |

 Osco----------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

119D2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Somewhat limited |

 | Slope |1.00 | Erosion hazard |1.00 | Slope |0.96

 | | | Slope |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

119E2: | | | | | |

 Elco----------------|Very limited | |Very limited | |Very limited |

 | Slope |1.00 | Erosion hazard |1.00 | Slope |1.00

 | | | Slope |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

131B: | | | | | |

 Alvin---------------|Somewhat limited | |Somewhat limited | |Drainage not needed|

 | Slope |0.25 | Slope |0.25 | |

 | | | Erosion hazard |0.17 | |

 | | | | | |
Knox County, Illinois 297

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

131D: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Slope |1.00 | |

 | | | Erosion hazard |0.17 | |

 | | | | | |

131F: | | | | | |

 Alvin---------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Slope |1.00 | |

 | | | Erosion hazard |0.17 | |

 | | | | | |

134B: | | | | | |

 Camden--------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

134C2: | | | | | |

 Camden--------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

134D2: | | | | | |

 Camden--------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

249A: | | | | | |

 Edinburg------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Ponding |1.00

 | | | Ponding |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

257A: | | | | | |

 Clarksdale----------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

259C2: | | | | | |

 Assumption----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |0.99 | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | Slope |0.99 | |

 | | | | | |

259D2: | | | | | |

 Assumption----------|Very limited | |Very limited | |Somewhat limited |

 | Slope |1.00 | Erosion hazard |1.00 | Slope |0.96

 | | | Slope |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

259D3: | | | | | |

 Assumption----------|Very limited | |Very limited | |Somewhat limited |

 | Slope |1.00 | Erosion hazard |1.00 | Slope |0.96

 | | | Slope |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |
298 Soil Survey of

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

280B: | | | | | |

 Fayette-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

280D2: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

280F: | | | | | |

 Fayette-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

344B: | | | | | |

 Harvard-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

536: | | | | | |

 Dumps---------------|Not rated | |Not rated | |Not rated |

 | | | | | |

549D2: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | Depth to bedrock |0.71 | Slope |1.00 | |

 | | | Depth to bedrock |0.71 | |

 | | | | | |

549F: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | Depth to bedrock |0.10 | Slope |1.00 | |

 | | | Depth to bedrock |0.10 | |

 | | | | | |

549G: | | | | | |

 Marseilles----------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | Depth to bedrock |0.10 | Slope |1.00 | |

 | | | Depth to bedrock |0.10 | |

 | | | | | |

567B2: | | | | | |

 Elkhart-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |
Knox County, Illinois 299

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

567C2: | | | | | |

 Elkhart-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

567D2: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

567D3: | | | | | |

 Elkhart-------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | | | Slope |1.00 | |

 | | | | | |

660C2: | | | | | |

 Coatsburg-----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |1.00 | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | Too clayey |0.02

 | | | Slope |1.00 | |

 | | | Erosion hazard |0.56 | |

 | | | | | |

675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

801B: | | | | | |

 Orthents------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |0.36 | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | Slope |0.36 | |

 | | | | | |

802B: | | | | | |

 Orthents------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.36 | Erosion hazard |1.00 | |

 | | | Slope |0.36 | |

 | | | | | |

835G: | | | | | |

 Earthen dams--------|Not rated | |Not rated | |Not rated |

 | | | | | |

863, 864, 865: | | | | | |

 Pits----------------|Not rated | |Not rated | |Not rated |

 | | | | | |

871B: | | | | | |

 Lenzburg------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.36 | Erosion hazard |1.00 | |

 | Rock fragment |0.18 | Slope |0.36 | |

 | content | | Rock fragment |0.18 | |

 | | | content | | |

 | | | | | |

871D: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | Rock fragment |0.18 | Slope |1.00 | |

 | content | | Rock fragment |0.18 | |

 | | | content | | |

 | | | | | |
300 Soil Survey of

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

871G: | | | | | |

 Lenzburg------------|Very limited | |Very limited | |Drainage not needed|

 | Slope |1.00 | Erosion hazard |1.00 | |

 | Rock fragment |0.22 | Slope |1.00 | |

 | content | | Rock fragment |0.22 | |

 | | | content | | |

 | | | | | |

872B: | | | | | |

 Rapatee-------------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |0.25 | Erosion hazard |1.00 | Depth to dense |0.50

 | | | Slope |0.25 | layer |

 | | | | | Cutbanks cave |0.10

 | | | | | |

901B: | | | | | |

 Ipava---------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

902A: | | | | | |

 Ipava---------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

 Sable---------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Ponding |1.00

 | | | Ponding |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

3074A: | | | | | |

 Radford-------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Flooding |1.00

 | | | Depth to |1.00 | Cutbanks cave |0.10

 | | | saturated zone | | |

 | | | | | |

3107+: | | | | | |

 Sawmill-------------|Not limited | |Very limited | |Very limited |

 | | | Depth to |1.00 | Flooding |1.00

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Erosion hazard |0.89 | |

 | | | | | |

3415A: | | | | | |

 Orion---------------|Not limited | |Very limited | |Very limited |

 | | | Erosion hazard |1.00 | Flooding |1.00

 | | | Depth to |1.00 | Cutbanks cave |1.00

 | | | saturated zone | | |

 | | | | | |

3451A: | | | | | |

 Lawson--------------|Not limited | |Very limited | |Very limited |

 | | | Depth to |1.00 | Flooding |1.00

 | | | saturated zone | | Cutbanks cave |0.10

 | | | Erosion hazard |0.89 | |

 | | | | | |
Knox County, Illinois 301

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

7081B: | | | | | |

 Littleton-----------|Somewhat limited | |Very limited | |Somewhat limited |

 | Slope |0.04 | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | Slope |0.04 | |

 | | | | | |

7104A: | | | | | |

 Virgil--------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

8077A: | | | | | |

 Huntsville----------|Not limited | |Somewhat limited | |Drainage not needed|

 | | | Erosion hazard |0.89 | |

 | | | | | |

 | | | | | |

 | | | | | |

8239A: | | | | | |

 Dorchester----------|Not limited | |Very limited | |Drainage not needed|

 | | | Erosion hazard |1.00 | |

 | | | | | |

9017A: | | | | | |

 Keomah--------------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

9086B: | | | | | |

 Osco----------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

9257A: | | | | | |

 Clarksdale----------|Not limited | |Very limited | |Somewhat limited |

 | | | Erosion hazard |1.00 | Cutbanks cave |0.10

 | | | Depth to |1.00 | |

 | | | saturated zone | | |

 | | | | | |

9279B: | | | | | |

 Rozetta-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

9279C2: | | | | | |

 Rozetta-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |

9280B: | | | | | |

 Fayette-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

9280C2: | | | | | |

 Fayette-------------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.99 | Erosion hazard |1.00 | |

 | | | Slope |0.99 | |

 | | | | | |
302 Soil Survey of

Table 17b.--Water Management--Continued

___________________________________________________________________________________________________

 | | |

 Map symbol | Constructing grassed |Constructing terraces and| Tile drains and

 and soil name | waterways and surface | diversions | underground outlets

 | drains | | _____________________________________________________________________________

 | Rating class and |Value| Rating class and |Value| Rating class and |Value

 | limiting features | | limiting features | | limiting features | ___________________________________________________________________________________________________

 | | | | | |

9675B: | | | | | |

 Greenbush-----------|Somewhat limited | |Very limited | |Drainage not needed|

 | Slope |0.25 | Erosion hazard |1.00 | |

 | | | Slope |0.25 | |

 | | | | | |

M-W. | | | | | |

 Miscellaneous water | | | | | |

 | | | | | |

W. | | | | | |

 Water | | | | | |

 | | | | | | ___________________________________________________________________________________________________
Table 18.--Engineering Index Properties (Absence of an entry indicates that data were not estimated. The representative values for USDA texture an

 classifications are designated with an asterisk. Representative values are indicative of conditions t commonly) __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 7D3: | | | | | | | | | |  Atlas-----------| 0-4 |Silty clay loam* |CH*, CL |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|7 | 4-66 |Silty clay*, |CH* |A-7-6*, A-7| 0 | 0 | 100 |95-100|95-100|7 | | silty clay loam,| | | | | | | |  | | clay, clay loam.| | | | | | | |  | 66-80 |Clay loam*, clay,|CL*, CH |A-7-6*, | 0 | 0 |95-100|90-100|80-100|6 | | loam. | | A-6, A-7 | | | | | |  | | | | | | | | | | 8D2: | | | | | | | | | |  Hickory---------| 0-6 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0-5 |95-100|90-100|75-100|5 | | | ML | | | | | | |  | 6-51 |Clay loam*, silty|CL* |A-6*, A-7 | 0-1 | 0-5 |85-100|70-100|65-95 |5 | | clay loam, | | | | | | | |  | | gravelly clay | | | | | | | |  | | loam. | | | | | | | |  | 51-60 |Loam*, clay loam,|CL-ML*, CL, |A-6*, A-4, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | gravelly clay | SC, SC-SM | A-2 | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 8F: | | | | | | | | | |  Hickory---------| 0-4 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0-5 |95-100|90-100|75-100|5 | | | ML | | | | | | |  | 4-12 |Loam* |CL*, ML, |A-4*, A-6 | 0 | 0-5 |95-100|90-100|75-100|5 | | | CL-ML | | | | | | |  | 12-53 |Clay loam*, silty|CL* |A-6*, A-7 | 0-1 | 0-5 |85-100|70-100|65-95 |5 | | clay loam, | | | | | | | |  | | gravelly clay | | | | | | | |  | | loam. | | | | | | | |  | 53-58 |Loam*, sandy |CL-ML*, CL, |A-6*, A-4, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | loam, gravelly | SC, SC-SM | A-2 | | | | | |  | | clay loam. | | | | | | | |  | 58-63 |Loam*, sandy |CL-ML*, CL, |A-6*, A-4, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | loam, gravelly | SC, SC-SM | A-2 | | | | | |  | | clay loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 8F2: | | | | | | | | | |  Hickory---------| 0-12 |Silt loam* |CL*, CL-ML, |A-4*, A-6 | 0 | 0-5 |95-100|90-100|75-100|5 | | | ML | | | | | | |  | 12-46 |Clay loam*, silty|CL* |A-6*, A-7 | 0-1 | 0-5 |85-100|70-100|65-95 |5 | | clay loam, | | | | | | | |  | | gravelly clay | | | | | | | |  | | loam. | | | | | | | |  | 46-72 |Loam*, sandy |CL-ML*, CL, |A-6*, A-2, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | loam, gravelly | SC, SC-SM | A-4 | | | | | |  | | clay loam. | | | | | | | |  | | | | | | | | | | 8G: | | | | | | | | | |  Hickory---------| 0-4 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0-5 |95-100|90-100|75-100|5 | | | ML | | | | | | |  | 4-12 |Loam* |CL*, ML, |A-4*, A-6 | 0 | 0-5 |95-100|90-100|75-100|5 | | | CL-ML | | | | | | |  | 12-40 |Clay loam*, silty|CL* |A-6*, A-7 | 0-1 | 0-5 |85-100|70-100|65-95 |5 | | clay loam, | | | | | | | |  | | gravelly clay | | | | | | | |  | | loam. | | | | | | | |  | 40-58 |Loam*, gravelly |CL*, CL-ML, |A-6*, A-2, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | clay loam. | SC, SC-SM | A-4 | | | | | |  | 58-63 |Loam*, sandy |CL-ML*, CL, |A-6*, A-2, | 0-1 | 0-5 |85-100|70-95 |45-95 |2 | | loam, gravelly | SC, SC-SM | A-4 | | | | | |  | | clay loam. | | | | | | | |  | | | | | | | | | | 17A: | | | | | | | | | |  Keomah----------| 0-11 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 11-18 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 18-33 |Silty clay loam*,|CL*, CH |A-7-6* | 0 | 0 | 100 | 100 | 100 |9 | | silty clay. | | | | | | | |  | 33-51 |Silty clay loam* |CL*, ML |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | 51-89 |Silt loam* |CL*, CL-ML, |A-4*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | | | ML | | | | | | |  | | | | | | | | | | 19C3: | | | | | | | | | |  Sylvan----------| 0-7 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | 7-37 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 37-60 |Silt loam*, silt |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 19D3: | | | | | | | | | |  Sylvan----------| 0-9 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | 9-28 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 28-60 |Silt loam*, silt |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 43A: | | | | | | | | | |  Ipava-----------| 0-20 |Silt loam* |ML*, CL |A-6* | 0 | 0 | 100 | 100 |95-100|9 | 20-40 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 40-60 |Silt loam*, silty|CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | | 45A: | | | | | | | | | |  Denny-----------| 0-9 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 9-22 |Silt loam* |CL*, CL-ML |A-4*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 22-45 |Silty clay loam*,|CH*, CL |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 45-60 |Silty clay loam*,|CL* |A-6* | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | | | | | | | | | | 68A: | | | | | | | | | |  Sable-----------| 0-17 |Silty clay loam* |CH*, CL, MH, |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 17-23 |Silty clay loam* |CH*, CL, MH, |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 23-60 |Silty clay loam*,|CL*, CH |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | | | | | | | | | | 86B: | | | | | | | | | |  Osco------------| 0-14 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 14-55 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 55-60 |Silt loam*, silty|CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | | clay loam. | | | | | | | |  | | | | | | | | | | 86B2: | | | | | | | | | |  Osco------------| 0-8 |Silt loam* |CL*, ML |A-6* | 0 | 0 | 100 | 100 |97-100|9 | 8-42 |Silty clay loam*,|CL*, ML |A-7-6*, A-6| 0 | 0 | 100 | 100 |97-100|9 | | silt loam. | | | | | | | |  | 42-51 |Silt loam*, silty|CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |97-100|9 | | clay loam. | | | | | | | |  | 51-60 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |96-100|9 | | | | | | | | | | 86C: | | | | | | | | | |  Osco------------| 0-14 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |97-100|9 | 14-43 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |97-100|9 | | silt loam. | | | | | | | |  | 43-60 |Silt loam*, silty|CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 |97-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 86C2: | | | | | | | | | |  Osco------------| 0-9 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 9-34 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | 34-60 |Silt loam*, silty|CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | | 86D2: | | | | | | | | | |  Osco------------| 0-8 |Silt loam*, silty|CL* |A-6* | 0 | 0 | 100 | 100 |97-100|9 | | clay loam. | | | | | | | |  | 8-51 |Silty clay loam* |CL* |A-7-6* | 0 | 0 | 100 | 100 |97-100|9 | 51-60 |Silt loam*, silty|CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 |97-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | | 119D2: | | | | | | | | | |  Elco------------| 0-6 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 6-28 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100|8 | | silt loam. | | | | | | | |  | 28-60 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 |90-100|80-100|6 | | loam, clay. | | | | | | | |  | | | | | | | | | | 119E2: | | | | | | | | | |  Elco------------| 0-2 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 2-9 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 9-32 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100|8 | | silt loam. | | | | | | | |  | 32-60 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 |90-100|85-95 |7 | | clay loam, clay.| | | | | | | |  | | | | | | | | | | 131B: | | | | | | | | | |  Alvin-----------| 0-4 |Sandy loam* |SM*, SC |A-4*, A-2-4| 0 | 0 | 100 | 100 |80-95 |3 | 4-10 |Fine sandy loam*,|SC*, SM |A-2-4*, A-4| 0 | 0 | 100 | 100 |80-95 |3 | | sandy loam, | | | | | | | |  | | loamy fine sand.| | | | | | | |  | 10-42 |Sandy loam*, very|SC, SM*, ML |A-4*, | 0 | 0 | 100 | 100 |70-100|2 | | fine sandy loam,| | A-2-4, A-6| | | | | |  | | loam. | | | | | | | |  | 42-60 |Stratified sandy |SM*, SP, |A-2-4*, | 0 | 0 |95-100|90-100|45-95 |  | | loam to loamy | SP-SM | A-1, A-3 | | | | | |  | | sand to sand*, | | | | | | | |  | | loamy sand. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 131D: | | | | | | | | | |  Alvin-----------| 0-5 |Sandy loam* |SM*, SC |A-4*, A-2-4| 0 | 0 | 100 | 100 |80-95 |3 | 5-20 |Fine sandy loam*,|SC*, SM |A-2-4*, A-4| 0 | 0 | 100 | 100 |80-95 |3 | | sandy loam, | | | | | | | |  | | loamy fine sand.| | | | | | | |  | 20-45 |Sandy loam*, very|SC, SM*, ML |A-4*, | 0 | 0 | 100 | 100 |70-100|2 | | fine sandy loam,| | A-2-4, A-6| | | | | |  | | loam. | | | | | | | |  | 45-60 |Stratified sandy |SM*, SP, |A-2-4*, | 0 | 0 |95-100|90-100|45-95 |  | | loam to loamy | SP-SM | A-1, A-3 | | | | | |  | | sand to sand*, | | | | | | | |  | | loamy sand. | | | | | | | |  | | | | | | | | | | 131F: | | | | | | | | | |  Alvin-----------| 0-3 |Sandy loam* |SM*, SC |A-4*, A-2-4| 0 | 0 | 100 | 100 |80-95 |3 | 3-9 |Fine sandy loam*,|SC*, SM |A-2-4*, A-4| 0 | 0 | 100 | 100 |80-95 |3 | | sandy loam, | | | | | | | |  | | loamy fine sand.| | | | | | | |  | 9-40 |Sandy loam*, very|SC, SM*, ML |A-4*, | 0 | 0 | 100 | 100 |70-100|2 | | fine sandy loam,| | A-2-4, A-6| | | | | |  | | loam. | | | | | | | |  | 40-60 |Stratified sandy |SM*, SP, |A-2-4*, | 0 | 0 |95-100|90-100|45-95 |  | | loam to loamy | SP-SM | A-1, A-3 | | | | | |  | | sand to sand*, | | | | | | | |  | | loamy sand. | | | | | | | |  | | | | | | | | | | 134B: | | | | | | | | | |  Camden----------| 0-9 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 9-15 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 15-34 |Silty clay loam*,|CL* |A-6* | 0 | 0 | 100 |97-100|95-100|9 | | silt loam. | | | | | | | |  | 34-40 |Clay loam*, sandy|CL*, ML, SC |A-6*, A-4 | 0 | 0-5 |90-100|90-100|70-85 |4 | | loam, silt loam.| | | | | | | |  | 40-60 |Stratified loamy |SM*, SC-SM |A-2-4* | 0 | 0-5 |90-100|70-100|35-60 |1 | | sand to sandy | | | | | | | |  | | loam*. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 134C2: | | | | | | | | | |  Camden----------| 0-7 |Silt loam* |CL*, CL-ML, |A-4*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 7-34 |Silty clay loam*,|CL* |A-6* | 0 | 0 | 100 |97-100|95-100|9 | | silt loam. | | | | | | | |  | 34-43 |Loam*, clay loam |CL*, ML, SC |A-6*, A-4 | 0 | 0 |90-100|90-100|70-85 |4 | 43-80 |Stratified loamy |SM*, SC-SM |A-2-4*, | 0 | 0 |90-100|80-100|35-60 |1 | | sand to sandy | | A-4, A-1-b| | | | | |  | | loam*. | | | | | | | |  | | | | | | | | | | 134D2: | | | | | | | | | |  Camden----------| 0-7 |Silt loam* |CL*, CL-ML, |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 7-34 |Silty clay loam*,|CL* |A-6* | 0 | 0 | 100 |97-100|95-100|9 | | silt loam. | | | | | | | |  | 34-43 |Loam*, clay loam |CL*, ML, SC |A-6*, A-4 | 0 | 0 |90-100|90-100|70-85 |4 | 43-80 |Stratified loamy |SM*, SC-SM |A-2-4*, | 0 | 0 |90-100|80-100|35-60 |1 | | sand to sandy | | A-4, A-1-b| | | | | |  | | loam*. | | | | | | | |  | | | | | | | | | | 249A: | | | | | | | | | |  Edinburg--------| 0-16 |Silty clay loam* |CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 16-55 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 55-60 |Silt loam*, silty|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | | 257A: | | | | | | | | | |  Clarksdale------| 0-8 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 |95-100|9 | 8-16 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 16-47 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 47-67 |Silt loam*, silty|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | 67-80 |Silt loam* |CL* |A-6* | 0 | 0 |95-100|95-100|95-100|9 | | | | | | | | | | 259C2: | | | | | | | | | |  Assumption------| 0-8 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 8-24 |Silty clay loam*,|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | 24-60 |Clay loam*, silty|CL* |A-6*, A-7 | 0 | 0-5 | 100 |95-100|90-100|7 | | clay loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 259D2: | | | | | | | | | |  Assumption------| 0-7 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 7-28 |Silty clay loam*,|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | 28-60 |Clay loam*, silty|CL* |A-6*, A-7 | 0 | 0-5 | 100 |95-100|90-100|7 | | clay loam, clay.| | | | | | | |  | | | | | | | | | | 259D3: | | | | | | | | | |  Assumption------| 0-8 |Silty clay loam* |CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 |95-100|9 | 8-29 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | 29-60 |Clay loam*, silty|CL* |A-7-6*, A-6| 0 | 0-5 | 100 |95-100|85-100|7 | | clay loam, clay.| | | | | | | |  | | | | | | | | | | 279B: | | | | | | | | | |  Rozetta---------| 0-7 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 7-11 |Silt loam* |CL*, CL-ML |A-4*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 11-55 |Silty clay loam* |CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 55-60 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | | clay loam. | | | | | | | |  | | | | | | | | | | 279C2: | | | | | | | | | |  Rozetta---------| 0-8 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | 8-56 |Silty clay loam* |CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 56-80 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | | clay loam. | | | | | | | |  | | | | | | | | | | 280B: | | | | | | | | | |  Fayette---------| 0-9 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 9-39 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 39-60 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 280C2: | | | | | | | | | |  Fayette---------| 0-8 |Silt loam* |CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 |9 | 8-64 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 64-80 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 280D2: | | | | | | | | | |  Fayette---------| 0-6 |Silt loam* |CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 |9 | 6-48 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 48-60 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 280F: | | | | | | | | | |  Fayette---------| 0-3 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 3-10 |Silt loam* |CL*, CL-ML |A-4*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 10-45 |Silty clay loam*,|CL* |A-7*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 45-60 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 344B: | | | | | | | | | |  Harvard---------| 0-7 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 |95-100|90-100|8 | 7-37 |Silty clay loam*,|CL*, ML |A-7-6*, A-6| 0 | 0 | 100 |90-100|90-100|8 | | silt loam. | | | | | | | |  | 37-45 |Clay loam* silt |CL*, ML |A-6*, A-4, | 0 | 0-3 |95-100|85-95 |75-90 |5 | | loam, sandy | | A-7-6 | | | | | |  | | loam. | | | | | | | |  | 45-60 |Stratified sandy |SC-SM*, CL, |A-4*, A-2, | 0 | 0-5 |90-100|80-95 |40-90 |1 | | loam to loam to | CL-ML, SM | A-6, A-7 | | | | | |  | | loamy sand*. | | | | | | | |  | | | | | | | | | | 536. | | | | | | | | | |  Dumps | | | | | | | | | |  | | | | | | | | | | 549D2: | | | | | | | | | |  Marseilles------| 0-5 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | 5-27 |Silty clay loam*,|CL*, CH |A-7-6*, A-7| 0-1 | 0-5 |95-100|90-100|85-100|8 | | clay loam, silty| | | | | | | |  | | clay. | | | | | | | |  | 27-60 |Weathered | --- | --- | --- | --- | --- | --- | --- |  | | bedrock*. | | | | | | | |  | | | | | | | | | | 549F: | | | | | | | | | |  Marseilles------| 0-10 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | 10-35 |Silty clay loam*,|CL*, CH |A-7-6*, A-7| 0-1 | 0-5 |95-100|90-100|85-100|8 | | silty clay, clay| | | | | | | |  | | loam. | | | | | | | |  | 35-60 |Weathered | --- | --- | --- | --- | --- | --- | --- |  | | bedrock*. | | | | | | | |  | | | | | | | | | | 549G: | | | | | | | | | |  Marseilles------| 0-10 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | 10-35 |Silty clay loam*,|CL*, CH |A-7-6* | 0-1 | 0-5 |95-100|90-100|85-100|8 | | clay loam, silty| | | | | | | |  | | clay. | | | | | | | |  | 35-60 |Weathered | --- | --- | --- | --- | --- | --- | --- |  | | bedrock*. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 567B2: | | | | | | | | | |  Elkhart---------| 0-8 |Silt loam*, silty|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 |9 | | clay loam. | | | | | | | |  | 8-30 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 30-60 |Silt loam*, silt |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 567C2: | | | | | | | | | |  Elkhart---------| 0-8 |Silt loam*, silty|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 |9 | | clay loam. | | | | | | | |  | 8-25 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 25-60 |Silt loam*, silt |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 567D2: | | | | | | | | | |  Elkhart---------| 0-10 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | 10-30 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | 30-60 |Silt loam*, silt |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 567D3: | | | | | | | | | |  Elkhart---------| 0-7 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | 7-21 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 21-60 |Silt loam*, silt |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | | | | | | | | | 660C2: | | | | | | | | | |  Coatsburg-------| 0-10 |Silt loam*, silty|CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | 10-80 |Silty clay*, |CH* |A-7-6* | 0 | 0 | 100 |95-100|75-90 |6 | | clay, silty clay| | | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 675B: | | | | | | | | | |  Greenbush-------| 0-14 |Silt loam* |CL*, CL-ML |A-4*, A-6 | 0 | 0 | 100 | 100 | 100 |9 | 14-60 |Silty clay loam*,|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 60-80 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 801B: | | | | | | | | | |  Orthents--------| 0-80 |Silty clay loam*,|CL*, CL-ML |A-7-6*, | 0 | 0 | 100 | 100 |90-100|8 | | silt loam. | | A-4, A-6 | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 802B: | | | | | | | | | |  Orthents--------| 0-6 |Loam* |CL* |A-6* | 0-1 | 0-5 |95-100|90-100|85-95 |6 | 6-60 |Loam*, silt loam,|CL* |A-6* | 0-1 | 0-5 |95-100|90-100|85-95 |6 | | clay loam. | | | | | | | |  | | | | | | | | | | 835G. | | | | | | | | | |  Earthen dams | | | | | | | | | |  | | | | | | | | | | 863, 864, 865. | | | | | | | | | |  Pits | | | | | | | | | |  | | | | | | | | | | 871B: | | | | | | | | | |  Lenzburg--------| 0-2 |Silty clay loam* |CL* |A-7-6*, | 0-1 | 2-10 |90-100|75-100|65-95 |5 | | | | A-6, A-7 | | | | | |  | 2-17 |Silty clay loam*,|CL*, CH |A-7-6*, | 0-2 | 2-10 |70-95 |60-90 |55-90 |5 | | channery clay | | A-6, A-7 | | | | | |  | | loam, clay loam.| | | | | | | |  | 17-60 |Channery loam*, |CL*, CH |A-6*, A-7 | 0-5 | 2-10 |80-95 |60-95 |50-90 |3 | | channery clay | | | | | | | |  | | loam, silty clay| | | | | | | |  | | loam, silt loam.| | | | | | | |  | | | | | | | | | | 871D: | | | | | | | | | |  Lenzburg--------| 0-2 |Silty clay loam* |CL* |A-7-6*, | 0-1 | 2-10 |90-100|75-100|65-95 |5 | | | | A-6, A-7 | | | | | |  | 2-17 |Silty clay loam*,|CL*, CH |A-7-6*, | 0-2 | 2-10 |70-95 |60-90 |55-90 |5 | | channery clay | | A-6, A-7 | | | | | |  | | loam, clay loam.| | | | | | | |  | 17-60 |Channery loam*, |CL*, CH |A-6*, A-7 | 0-5 | 2-10 |80-95 |60-95 |50-90 |3 | | channery clay | | | | | | | |  | | loam, silty clay| | | | | | | |  | | loam, silt loam.| | | | | | | |  | | | | | | | | | | 871G: | | | | | | | | | |  Lenzburg--------| 0-3 |Silty clay loam* |CL* |A-7-6*, | 0-1 | 2-10 |80-95 |60-90 |50-85 |4 | | | | A-6, A-7 | | | | | |  | 3-24 |Channery silty |CL* |A-6*, A-7 | 0-1 | 3-9 |75-95 |55-95 |50-90 |4 | | clay loam*, | | | | | | | |  | | silty clay loam,| | | | | | | |  | | silt loam. | | | | | | | |  | 24-60 |Channery clay |CL*, CH |A-7-6*, | 0-3 | 2-14 |75-95 |40-85 |35-82 |2 | | loam*, clay | | A-6, A-7 | | | | | |  | | loam, silty clay| | | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 872B: | | | | | | | | | |  Rapatee---------| 0-3 |Silty clay loam*,|CL*, ML |A-7-6*, | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | A-4, A-6 | | | | | |  | 3-48 |Silty clay loam*,|CL*, ML |A-7-6*, | 0 | 0-10 |90-100|75-100|70-100|6 | | silt loam. | | A-4, A-6 | | | | | |  | 48-60 |Clay loam*, silty|CL*, ML |A-6*, A-4 | 0 | 0-15 |90-100|65-90 |60-90 |5 | | clay loam, loam.| | | | | | | |  | | | | | | | | | | 901B: | | | | | | | | | |  Ipava-----------| 0-20 |Silt loam* |ML*, CL |A-6* | 0 | 0 | 100 | 100 |95-100|9 | 20-40 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 40-60 |Silt loam*, silty|CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | |  Osco------------| 0-14 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 14-55 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 55-60 |Silt loam*, silty|CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | | clay loam. | | | | | | | |  | | | | | | | | | | 902A: | | | | | | | | | |  Ipava-----------| 0-20 |Silt loam* |ML*, CL |A-6* | 0 | 0 | 100 | 100 |95-100|9 | 20-40 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100|9 | | silty clay. | | | | | | | |  | 40-60 |Silt loam*, silty|CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|9 | | clay loam. | | | | | | | |  | | | | | | | | | |  Sable-----------| 0-17 |Silty clay loam* |CH*, CL, MH, |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 17-23 |Silty clay loam* |CH*, CL, MH, |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | | ML | | | | | | |  | 23-60 |Silty clay loam*,|CL*, CH |A-7-6* | 0 | 0 | 100 | 100 |95-100|9 | | silt loam. | | | | | | | |  | | | | | | | | | | 3074A: | | | | | | | | | |  Radford---------| 0-12 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | 12-33 |Silt loam* |CL*, ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | 33-60 |Silty clay loam*,|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 |85-100|7 | | silt loam, clay | | | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passin Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |_____________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 3107+: | | | | | | | | | |  Sawmill---------| 0-11 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 |95-100| | 11-36 |Silty clay loam* |CL* |A-6*, A-7 | 0 | 0 | 100 | 100 |95-100| | 36-53 |Silty clay loam*,|CL* |A-6*, A-4, | 0 | 0 | 100 | 100 |95-100| | | clay loam, loam.| | A-7 | | | | | |  | 53-60 |Silty clay loam*,|CL* |A-6*, A-4, | 0 | 0 | 100 | 100 |85-100| | | clay loam, silt | | A-7 | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 3415A: | | | | | | | | | |  Orion-----------| 0-7 |Silt loam* |CL*, CL-ML |A-4*, A-6 | 0 | 0 | 100 | 100 |85-100| | 7-22 |Stratified very |CL-ML*, CL |A-4* | 0 | 0 | 100 | 100 |90-100| | | fine sand to | | | | | | | |  | | silt loam*. | | | | | | | |  | 22-60 |Silt loam*, silty|CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |85-100| | | clay loam. | | | | | | | |  | 60-80 |Stratified sand |CL-ML*, CL |A-4* | 0 | 0 |80-100|80-100|80-100| | | to silt loam*. | | | | | | | |  | | | | | | | | | | 3451A: | | | | | | | | | |  Lawson----------| 0-14 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |90-100| | 14-33 |Silt loam*, silty|CL*, CL-ML |A-4* | 0 | 0 | 100 | 100 |90-100| | | clay loam. | | | | | | | |  | 33-80 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |90-100| | | clay loam. | | | | | | | |  | | | | | | | | | | 7081B: | | | | | | | | | |  Littleton-------| 0-6 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | 6-32 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | 32-60 |Silt loam* |CL*, CL-ML |A-6*, A-4, | 0 | 0 | 100 | 100 |95-100| | | | | A-7 | | | | | |  | | | | | | | | | | 7104A: | | | | | | | | | |  Virgil----------| 0-8 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |90-100| | 8-13 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | 13-19 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |90-100| | | clay loam. | | | | | | | |  | 19-47 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100| | 47-55 |Loam* |CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 |80-100| | 55-63 |Stratified loam |CL*, CL-ML, |A-4*, A-6, | 0 | 0-5 |90-100|85-100|70-100| | | to silt loam to | SC, SC-SM | A-2-4, | | | | | |  | | clay loam*, | | A-2-6 | | | | | |  | | sandy loam, | | | | | | | |  | | silty clay loam.| | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passin Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |_____________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 8077A: | | | | | | | | | |  Huntsville------| 0-27 |Silt loam* |CL* |A-6* | 0 | 0 | 100 |95-100|90-100| | 27-54 |Silt loam* |CL* |A-6* | 0 | 0 | 100 |95-100|90-100| | 52-80 |Silt loam*, loam,|CL*, CL-ML, |A-6*, A-2, | 0 | 0 |95-100|90-100|85-95 | | | very fine sandy | SC, SC-SM | A-4 | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 8239A: | | | | | | | | | |  Dorchester------| 0-6 |Silt loam* |CL*, CL-ML, |A-4* | 0 | 0 |95-100|95-100|80-100| | | | ML | | | | | | |  | 6-60 |Stratified silt |CL*, ML |A-6*, A-7-6| 0 | 0 | 100 | 100 |95-100| | | loam*, silty | | | | | | | |  | | clay loam, clay | | | | | | | |  | | loam. | | | | | | | |  | | | | | | | | | | 9017A: | | | | | | | | | |  Keomah----------| 0-9 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 | | 9-16 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 | | 16-49 |Silty clay loam*,|CH* |A-7* | 0 | 0 | 100 | 100 | 100 | | | silty clay. | | | | | | | |  | 49-80 |Silty clay loam*,|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 | | | silt loam. | | | | | | | |  | | | | | | | | | | 9086B: | | | | | | | | | |  Osco------------| 0-14 |Silt loam* |CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 | 100 | | 14-55 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 | | | silt loam. | | | | | | | |  | 55-60 |Silt loam*, silty|CL* |A-6*, A-7 | 0 | 0 | 100 | 100 | 100 | | | clay loam. | | | | | | | |  | | | | | | | | | | 9257A: | | | | | | | | | |  Clarksdale------| 0-10 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 |95-100| | 10-16 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | 16-46 |Silty clay loam*,|CH*, CL |A-7* | 0 | 0 | 100 | 100 |95-100| | | silty clay. | | | | | | | |  | 46-80 |Silt loam*, silty|CL* |A-6* | 0 | 0 |95-100|95-100|95-100| | | clay loam. | | | | | | | |  | | | | | | | | | | 9279B: | | | | | | | | | |  Rozetta---------| 0-9 |Silt loam* |CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | 9-66 |Silty clay loam* |CL* |A-7*, A-6 | 0 | 0 | 100 | 100 |95-100| | 66-76 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100| | | clay loam. | | | | | | | |  | | | | | | | | | | 
Table 18.--Engineering Index Properties--Continued __________________________________________________________________________________________________________

 | | | Classification | Fragments | Percentage passing  Map symbol | Depth | USDA texture |_________________________|_____________| sieve number--  and soil name | | | | | >10 | 3-10 |______________________ | | | Unified | AASHTO |inches|inches| 4 | 10 | 40 | __________________________________________________________________________________________________________ | In | | | | Pct | Pct | | | |  | | | | | | | | | | 9279C2: | | | | | | | | | |  Rozetta---------| 0-7 |Silt loam* |CL* |A-4*, A-6 | 0 | 0 | 100 | 100 |95-100|9 | 7-66 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 |95-100|9 | 66-70 |Silt loam*, silty|CL* |A-6*, A-4 | 0 | 0 | 100 | 100 |95-100|8 | | clay loam. | | | | | | | |  | | | | | | | | | | 9280B: | | | | | | | | | |  Fayette---------| 0-9 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 9-39 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 39-60 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 9280C2: | | | | | | | | | |  Fayette---------| 0-8 |Silt loam* |CL* |A-6*, A-7-6| 0 | 0 | 100 | 100 | 100 |9 | 8-64 |Silty clay loam*,|CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | | silt loam. | | | | | | | |  | 64-80 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | 9675B: | | | | | | | | | |  Greenbush-------| 0-14 |Silt loam* |CL*, CL-ML |A-6*, A-4 | 0 | 0 | 100 | 100 | 100 |9 | 14-60 |Silty clay loam* |CL* |A-7-6*, A-6| 0 | 0 | 100 | 100 | 100 |9 | 60-80 |Silt loam* |CL* |A-6* | 0 | 0 | 100 | 100 | 100 |9 | | | | | | | | | | M-W. | | | | | | | | | |  Miscellaneous | | | | | | | | | |  water | | | | | | | | | |  | | | | | | | | | | W. | | | | | | | | | |  Water | | | | | | | | | |  | | | | | | | | | | __________________________________________________________________________________________________________
Knox County, Illinois 317

Table 19.--Physical Properties of the Soils

(Entries under "Erosion factors--T" apply to the entire profile. Entries under "Wind erodibility group" and "Wind

 erodibility index" apply only to the surface layer. Absence of an entry indicates that data were not estimated)

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

7D3: | | | | | | | | | | | |

 Atlas------------| 0-4 | 30-40|1.35-1.55| 0.06-0.2 |0.14-0.19| 6.0-8.9 | 0.5-1.0 | .28 | .28 | 2 | 4 | 86

 | 4-66 | 38-45|1.35-1.55| 0.01-0.06 |0.07-0.19| 6.0-8.9 | 0.0-1.0 | .28 | .28 | | |

 | 66-80 | 25-45|1.35-1.60| 0.06-0.2 |0.07-0.18| 3.0-5.9 | 0.0-1.0 | .28 | .28 | | |

 | | | | | | | | | | | |

8D2: | | | | | | | | | | | |

 Hickory----------| 0-6 | 19-25|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-2.0 | .32 | .32 | 5 | 6 | 48

 | 6-51 | 27-35|1.45-1.65| 0.6-2 |0.15-0.19| 3.0-5.9 | 0.0-0.5 | .28 | .32 | | |

 | 51-60 | 15-32|1.50-1.70| 0.6-2 |0.11-0.19| 0.0-2.9 | 0.0-0.2 | .28 | .32 | | |

 | | | | | | | | | | | |

8F: | | | | | | | | | | | |

 Hickory----------| 0-4 | 19-25|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .32 | .32 | 5 | 6 | 48

 | 4-12 | 15-22|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .37 | .37 | | |

 | 12-53 | 24-35|1.45-1.65| 0.6-2 |0.15-0.19| 3.0-5.9 | 0.0-0.5 | .28 | .32 | | |

 | 53-58 | 15-32|1.50-1.70| 0.6-2 |0.11-0.19| 0.0-2.9 | 0.0-0.5 | .28 | .32 | | |

 | 58-63 | 15-30|1.50-1.75| 0.6-2 |0.10-0.15| 0.0-2.9 | 0.0-0.5 | .28 | .32 | | |

 | | | | | | | | | | | |

8F2: | | | | | | | | | | | |

 Hickory----------| 0-12 | 19-25|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-2.0 | .32 | .32 | 5 | 6 | 48

 | 12-46 | 24-35|1.45-1.65| 0.6-2 |0.15-0.19| 3.0-5.9 | 0.0-0.5 | .28 | .32 | | |

 | 46-72 | 15-32|1.50-1.70| 0.6-2 |0.11-0.19| 0.0-2.9 | 0.0-0.5 | .28 | .32 | | |

 | | | | | | | | | | | |

8G: | | | | | | | | | | | |

 Hickory----------| 0-4 | 19-25|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .32 | .32 | 5 | 6 | 48

 | 4-12 | 15-22|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .37 | .37 | | |

 | 12-40 | 24-35|1.45-1.65| 0.6-2 |0.15-0.19| 3.0-5.9 | 0.0-0.5 | .28 | .32 | | |

 | 40-58 | 15-32|1.50-1.70| 0.6-2 |0.11-0.19| 0.0-2.9 | 0.0-0.5 | .28 | .32 | | |

 | 58-63 | 15-30|1.50-1.75| 0.6-2 |0.10-0.15| 0.0-2.9 | 0.0-0.5 | .28 | .32 | | |

 | | | | | | | | | | | |

17A: | | | | | | | | | | | |

 Keomah-----------| 0-11 | 16-26|1.35-1.45| 0.6-2 |0.19-0.24| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 11-18 | 16-26|1.40-1.60| 0.2-0.6 |0.17-0.21| 0.0-2.9 | 0.1-1.0 | .49 | .49 | | |

 | 18-33 | 35-42|1.30-1.40| 0.06-0.2 |0.15-0.19| 6.0-8.9 | 0.1-0.5 | .37 | .37 | | |

 | 33-51 | 27-35|1.35-1.45| 0.2-0.6 |0.16-0.20| 3.0-5.9 | 0.1-0.5 | .37 | .37 | | |

 | 51-89 | 15-27|1.40-1.60| 0.2-2 |0.19-0.22| 0.0-2.9 | 0.0-0.2 | .49 | .49 | | |

 | | | | | | | | | | | |

19C3: | | | | | | | | | | | |

 Sylvan-----------| 0-7 | 27-32|1.25-1.45| 0.6-2 |0.20-0.22| 3.0-5.9 | 0.5-1.0 | .37 | .37 | 5 | 6 | 48

 | 7-37 | 25-35|1.30-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 37-60 | 10-27|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

19D3: | | | | | | | | | | | |

 Sylvan-----------| 0-9 | 27-32|1.25-1.45| 0.6-2 |0.20-0.22| 3.0-5.9 | 0.5-1.0 | .37 | .37 | 4 | 6 | 48

 | 9-28 | 25-35|1.30-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 28-60 | 10-27|1.30-1.50| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

43A: | | | | | | | | | | | |

 Ipava------------| 0-20 | 20-27|1.15-1.35| 0.6-2 |0.22-0.24| 3.0-5.9 | 4.0-5.0 | .28 | .28 | 5 | 6 | 48

 | 20-40 | 35-43|1.25-1.50| 0.2-0.6 |0.11-0.20| 6.0-8.9 | 0.5-1.0 | .37 | .37 | | |

 | 40-60 | 20-30|1.30-1.55| 0.2-0.6 |0.20-0.22| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

45A: | | | | | | | | | | | |

 Denny------------| 0-9 | 20-27|1.25-1.45| 0.6-2 |0.22-0.24| 0.0-2.9 | 3.0-4.0 | .37 | .37 | 5 | 6 | 48

 | 9-22 | 15-22|1.25-1.45| 0.2-0.6 |0.18-0.20| 0.0-2.9 | 0.0-0.5 | .43 | .43 | | |

 | 22-45 | 35-45|1.20-1.40| 0.06-0.2 |0.11-0.22| 6.0-8.9 | 0.0-1.0 | .37 | .37 | | |

 | 45-60 | 25-35|1.40-1.60| 0.2-0.6 |0.20-0.22| 3.0-5.9 | 0.0-0.2 | .43 | .43 | | |

 | | | | | | | | | | | |
318 Soil Survey of

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

68A: | | | | | | | | | | | |

 Sable------------| 0-17 | 27-35|1.15-1.35| 0.6-2 |0.21-0.23| 3.0-5.9 | 5.0-6.0 | .24 | .24 | 5 | 6 | 48

 | 17-23 | 27-35|1.20-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 2.0-4.0 | .24 | .24 | | |

 | 23-60 | 24-35|1.30-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.2-1.0 | .37 | .37 | | |

 | | | | | | | | | | | |

86B: | | | | | | | | | | | |

 Osco-------------| 0-14 | 20-26|1.25-1.30| 0.6-2 |0.22-0.24| 3.0-5.9 | 3.0-4.0 | .28 | .28 | 5 | 6 | 48

 | 14-55 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 55-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

86B2: | | | | | | | | | | | |

 Osco-------------| 0-8 | 20-26|1.40-1.60| 0.6-2 |0.18-0.22| 0.0-2.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 8-42 | 25-35|1.35-1.55| 0.6-2 |0.18-0.21| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 42-51 | 15-30|1.35-1.55| 0.6-2 |0.18-0.23| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | 51-60 | 15-27|1.40-1.60| 0.6-2 |0.19-0.26| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

86C: | | | | | | | | | | | |

 Osco-------------| 0-14 | 20-26|1.25-1.30| 0.6-2 |0.22-0.24| 0.0-2.9 | 2.0-4.0 | .28 | .28 | 5 | 6 | 48

 | 14-43 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 43-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

86C2: | | | | | | | | | | | |

 Osco-------------| 0-9 | 20-26|1.25-1.30| 0.6-2 |0.22-0.24| 3.0-5.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 9-34 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 34-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

86D2: | | | | | | | | | | | |

 Osco-------------| 0-8 | 20-27|1.25-1.30| 0.6-2 |0.22-0.24| 3.0-5.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 8-51 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 51-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

119D2: | | | | | | | | | | | |

 Elco-------------| 0-6 | 20-27|1.20-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 6-28 | 23-35|1.25-1.45| 0.6-2 |0.18-0.21| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 28-60 | 25-45|1.45-1.70| 0.06-0.6 |0.14-0.20| 6.0-8.9 | 0.0-0.2 | .28 | .28 | | |

 | | | | | | | | | | | |

119E2: | | | | | | | | | | | |

 Elco-------------| 0-2 | 20-27|1.20-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 2-9 | 20-27|1.20-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | 9-32 | 23-35|1.25-1.45| 0.6-2 |0.18-0.21| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 32-60 | 25-45|1.40-1.60| 0.06-0.6 |0.16-0.20| 6.0-8.9 | 0.0-0.2 | .28 | .28 | | |

 | | | | | | | | | | | |

131B: | | | | | | | | | | | |

 Alvin------------| 0-4 | 10-15|1.45-1.65| 2-6 |0.14-0.17| 0.0-2.9 | 0.5-1.0 | .24 | .24 | 5 | 3 | 86

 | 4-10 | 5-15|1.45-1.65| 2-6 |0.10-0.17| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 10-42 | 10-22|1.40-1.65| 2-6 |0.14-0.18| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 42-60 | 3-15|1.45-1.65| 2-6 |0.10-0.15| 0.0-2.9 | 0.0-0.3 | .02 | .02 | | |

 | | | | | | | | | | | |

131D: | | | | | | | | | | | |

 Alvin------------| 0-5 | 10-15|1.45-1.65| 2-6 |0.14-0.17| 0.0-2.9 | 0.5-1.0 | .24 | .24 | 5 | 3 | 86

 | 5-20 | 5-15|1.45-1.65| 2-6 |0.10-0.17| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 20-45 | 10-22|1.40-1.65| 2-6 |0.14-0.18| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 45-60 | 3-15|1.45-1.65| 2-6 |0.10-0.15| 0.0-2.9 | 0.0-0.3 | .02 | .02 | | |

 | | | | | | | | | | | |

131F: | | | | | | | | | | | |

 Alvin------------| 0-3 | 10-15|1.45-1.65| 2-6 |0.14-0.17| 0.0-2.9 | 0.5-1.0 | .24 | .24 | 5 | 3 | 86

 | 3-9 | 5-15|1.45-1.65| 2-6 |0.10-0.17| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 9-40 | 10-22|1.40-1.65| 2-6 |0.14-0.18| 0.0-2.9 | 0.0-0.5 | .24 | .24 | | |

 | 40-60 | 3-15|1.45-1.65| 2-6 |0.10-0.15| 0.0-2.9 | 0.0-0.3 | .02 | .02 | | |

 | | | | | | | | | | | |
Knox County, Illinois 319

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

134B: | | | | | | | | | | | |

 Camden-----------| 0-9 | 14-27|1.35-1.55| 0.6-2 |0.21-0.25| 0.0-2.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 9-15 | 14-27|1.35-1.55| 0.6-2 |0.21-0.25| 0.0-2.9 | 0.1-0.5 | .43 | .43 | | |

 | 15-34 | 22-35|1.40-1.60| 0.6-2 |0.14-0.24| 3.0-5.9 | 0.1-0.5 | .37 | .37 | | |

 | 34-40 | 18-30|1.45-1.65| 0.6-2 |0.11-0.22| 0.0-2.9 | 0.0-0.5 | .32 | .32 | | |

 | 40-60 | 5-20|1.40-1.70| 0.6-6 |0.12-0.22| 0.0-2.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

134C2: | | | | | | | | | | | |

 Camden-----------| 0-7 | 15-27|1.35-1.55| 0.6-2 |0.19-0.24| 0.0-2.9 | 1.0-2.5 | .43 | .43 | 5 | 6 | 48

 | 7-34 | 25-35|1.35-1.55| 0.6-2 |0.18-0.21| 3.0-5.9 | 0.1-0.5 | .37 | .37 | | |

 | 34-43 | 22-30|1.45-1.65| 0.6-2 |0.11-0.14| 0.0-2.9 | 0.0-0.5 | .32 | .32 | | |

 | 43-80 | 5-15|1.45-1.65| 2-6 |0.06-0.10| 0.0-2.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

134D2: | | | | | | | | | | | |

 Camden-----------| 0-7 | 15-27|1.35-1.55| 0.6-2 |0.19-0.24| 0.0-2.9 | 1.0-2.5 | .43 | .43 | 5 | 6 | 48

 | 7-34 | 25-35|1.35-1.55| 0.6-2 |0.18-0.21| 3.0-5.9 | 0.1-0.5 | .37 | .37 | | |

 | 34-43 | 22-30|1.45-1.65| 0.6-2 |0.11-0.14| 0.0-2.9 | 0.0-0.5 | .32 | .32 | | |

 | 43-80 | 5-15|1.45-1.65| 2-6 |0.06-0.10| 0.0-2.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

249A: | | | | | | | | | | | |

 Edinburg---------| 0-16 | 27-35|1.10-1.30| 0.6-2 |0.21-0.24| 6.0-8.9 | 3.0-6.0 | .24 | .24 | 5 | 6 | 48

 | 16-55 | 35-46|1.20-1.40| 0.06-0.2 |0.13-0.20| 6.0-8.9 | 0.2-1.0 | .37 | .37 | | |

 | 55-60 | 22-30|1.30-1.50| 0.2-2 |0.18-0.22| 3.0-5.9 | 0.0-0.2 | .49 | .49 | | |

 | | | | | | | | | | | |

257A: | | | | | | | | | | | |

 Clarksdale-------| 0-8 | 20-27|1.30-1.50| 0.6-2 |0.22-0.25| 3.0-5.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 8-16 | 15-27|1.25-1.50| 0.2-0.6 |0.20-0.22| 0.0-2.9 | 0.0-1.0 | .43 | .43 | | |

 | 16-47 | 35-45|1.30-1.50| 0.2-0.6 |0.11-0.20| 6.0-8.9 | 0.0-0.5 | .37 | .37 | | |

 | 47-67 | 20-30|1.40-1.60| 0.6-2 |0.20-0.22| 3.0-5.9 | 0.0-0.5 | .43 | .43 | | |

 | 67-80 | 18-27|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

259C2: | | | | | | | | | | | |

 Assumption-------| 0-8 | 20-27|1.25-1.45| 0.6-2 |0.23-0.25| 0.0-2.9 | 3.0-4.0 | .28 | .28 | 5 | 6 | 48

 | 8-24 | 25-35|1.20-1.40| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 24-60 | 25-45|1.40-1.60| 0.06-0.6 |0.16-0.20| 3.0-8.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

259D2: | | | | | | | | | | | |

 Assumption-------| 0-7 | 20-27|1.25-1.45| 0.6-2 |0.23-0.25| 0.0-2.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 7-28 | 25-35|1.20-1.40| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 28-60 | 30-45|1.45-1.65| 0.06-0.6 |0.14-0.20| 6.0-8.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

259D3: | | | | | | | | | | | |

 Assumption-------| 0-8 | 27-35|1.30-1.50| 0.6-2 |0.15-0.19| 3.0-5.9 | 1.0-2.0 | .37 | .37 | 5 | 6 | 48

 | 8-29 | 25-35|1.50-1.60| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 29-60 | 30-45|1.45-1.65| 0.06-0.6 |0.14-0.20| 6.0-8.9 | 0.0-0.5 | .28 | .28 | | |

 | | | | | | | | | | | |

279B: | | | | | | | | | | | |

 Rozetta----------| 0-7 | 15-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 7-11 | 12-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.1-1.0 | .49 | .49 | | |

 | 11-55 | 27-35|1.35-1.55| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 55-60 | 20-30|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

279C2: | | | | | | | | | | | |

 Rozetta----------| 0-8 | 15-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 8-56 | 27-35|1.35-1.55| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.2-0.5 | .37 | .37 | | |

 | 56-80 | 20-30|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.2-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

280B: | | | | | | | | | | | |

 Fayette----------| 0-9 | 15-27|1.30-1.35| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 9-39 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 39-60 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |
320 Soil Survey of

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

280C2: | | | | | | | | | | | |

 Fayette----------| 0-8 | 25-27|1.35-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 8-64 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 64-80 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

280D2: | | | | | | | | | | | |

 Fayette----------| 0-6 | 25-27|1.35-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 6-48 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 48-60 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

280F: | | | | | | | | | | | |

 Fayette----------| 0-3 | 15-27|1.30-1.35| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 3-10 | 12-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.1-1.0 | .49 | .49 | | |

 | 10-45 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 45-60 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

344B: | | | | | | | | | | | |

 Harvard----------| 0-7 | 20-27|1.15-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 2.0-3.0 | .32 | .32 | 5 | 6 | 48

 | 7-37 | 25-35|1.25-1.55| 0.6-2 |0.15-0.20| 3.0-5.9 | 0.0-0.5 | .43 | .43 | | |

 | 37-45 | 15-35|1.30-1.60| 0.6-2 |0.12-0.19| 0.0-2.9 | 0.0-0.4 | .43 | .43 | | |

 | 45-60 | 5-25|1.40-1.70| 2-6 |0.05-0.15| 0.0-2.9 | 0.0-0.4 | .43 | .43 | | |

 | | | | | | | | | | | |

536. | | | | | | | | | | | |

 Dumps | | | | | | | | | | | |

 | | | | | | | | | | | |

549D2: | | | | | | | | | | | |

 Marseilles-------| 0-5 | 20-27|1.20-1.40| 0.6-2 |0.20-0.24| 0.0-2.9 | 1.0-3.0 | .32 | .32 | 3 | 6 | 48

 | 5-27 | 27-42|1.35-1.60| 0.06-0.2 |0.09-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 27-60 | --- | --- |0.0015-0.2 | --- | --- | --- | --- | --- | | |

 | | | | | | | | | | | |

549F: | | | | | | | | | | | |

 Marseilles-------| 0-10 | 20-27|1.20-1.40| 0.6-2 |0.20-0.24| 0.0-2.9 | 1.0-3.0 | .32 | .32 | 3 | 6 | 48

 | 10-35 | 27-42|1.35-1.60| 0.06-0.2 |0.09-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 35-60 | --- | --- |0.0015-0.2 | --- | --- | --- | --- | --- | | |

 | | | | | | | | | | | |

549G: | | | | | | | | | | | |

 Marseilles-------| 0-10 | 20-27|1.20-1.40| 0.6-2 |0.20-0.24| 0.0-2.9 | 1.0-3.0 | .32 | .32 | 3 | 6 | 48

 | 10-35 | 27-42|1.35-1.60| 0.06-0.2 |0.09-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 35-60 | --- | --- |0.0015-0.2 | --- | --- | --- | --- | --- | | |

 | | | | | | | | | | | |

567B2: | | | | | | | | | | | |

 Elkhart----------| 0-8 | 20-29|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .28 | .28 | 4 | 6 | 48

 | 8-30 | 25-35|1.25-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .43 | .43 | | |

 | 30-60 | 10-27|1.35-1.55| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.1 | .43 | .43 | | |

 | | | | | | | | | | | |

567C2: | | | | | | | | | | | |

 Elkhart----------| 0-8 | 20-29|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .28 | .28 | 5 | 6 | 48

 | 8-25 | 25-35|1.25-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 25-60 | 10-27|1.35-1.55| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.1 | .49 | .49 | | |

 | | | | | | | | | | | |

567D2: | | | | | | | | | | | |

 Elkhart----------| 0-10 | 20-27|1.15-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .28 | .28 | 5 | 6 | 48

 | 10-30 | 25-35|1.25-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 30-60 | 10-27|1.35-1.55| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.1 | .49 | .49 | | |

 | | | | | | | | | | | |

567D3: | | | | | | | | | | | |

 Elkhart----------| 0-7 | 27-35|1.20-1.40| 0.6-2 |0.20-0.22| 3.0-5.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 7-21 | 25-35|1.25-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 21-60 | 10-27|1.35-1.55| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-0.1 | .49 | .49 | | |

 | | | | | | | | | | | |
Knox County, Illinois 321

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

660C2: | | | | | | | | | | | |

 Coatsburg--------| 0-10 | 20-30|1.20-1.40| 0.2-0.6 |0.22-0.24| 3.0-5.9 | 3.0-4.0 | .24 | .24 | 3 | 6 | 48

 | 10-80 | 35-45|1.50-1.70| 0.01-0.06 |0.09-0.13| 6.0-8.9 | 0.0-1.0 | .28 | .28 | | |

 | | | | | | | | | | | |

675B: | | | | | | | | | | | |

 Greenbush--------| 0-14 | 18-25|1.25-1.30| 0.6-2 |0.21-0.23| 0.0-2.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 14-60 | 26-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.5-1.0 | .37 | .37 | | |

 | 60-80 | 18-27|1.35-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

801B: | | | | | | | | | | | |

 Orthents---------| 0-80 | 20-35|1.35-1.55| 0.2-2 |0.18-0.22| 3.0-5.9 | 0.2-1.0 | .43 | .43 | 5 | 4L | 86

 | | | | | | | | | | | |

802B: | | | | | | | | | | | |

 Orthents---------| 0-6 | 22-30|1.70-1.75| 0.2-0.6 |0.18-0.22| 3.0-5.9 | 0.5-2.0 | .43 | .43 | 5 | 6 | 48

 | 6-60 | 22-30|1.70-1.80| 0.2-0.6 |0.16-0.20| 3.0-5.9 | 0.2-1.0 | .43 | .43 | | |

 | | | | | | | | | | | |

835G. | | | | | | | | | | | |

 Earthen dams | | | | | | | | | | | |

 | | | | | | | | | | | |

863, 864, 865. | | | | | | | | | | | |

 Pits | | | | | | | | | | | |

 | | | | | | | | | | | |

871B: | | | | | | | | | | | |

 Lenzburg---------| 0-2 | 27-35|1.30-1.60| 0.6-2 |0.17-0.22| 3.0-5.9 | 0.5-1.0 | .32 | .32 | 5 | 4L | 86

 | 2-17 | 25-40|1.40-1.70| 0.2-0.6 |0.11-0.17| 3.0-5.9 | 0.2-1.0 | .32 | .32 | | |

 | 17-60 | 20-35|1.50-1.70| 0.2-0.6 |0.08-0.18| 3.0-5.9 | 0.2-0.5 | .37 | .43 | | |

 | | | | | | | | | | | |

871D: | | | | | | | | | | | |

 Lenzburg---------| 0-2 | 27-35|1.30-1.60| 0.6-2 |0.17-0.22| 3.0-5.9 | 0.5-1.0 | .32 | .32 | 5 | 4L | 86

 | 2-17 | 25-40|1.40-1.70| 0.2-0.6 |0.11-0.17| 3.0-5.9 | 0.2-1.0 | .32 | .32 | | |

 | 17-60 | 20-35|1.50-1.70| 0.2-0.6 |0.08-0.18| 3.0-5.9 | 0.2-0.5 | .37 | .43 | | |

 | | | | | | | | | | | |

871G: | | | | | | | | | | | |

 Lenzburg---------| 0-3 | 27-35|1.30-1.60| 0.6-2 |0.17-0.22| 3.0-5.9 | 0.5-4.0 | .32 | .32 | 5 | 4L | 86

 | 3-24 | 20-35|1.40-1.70| 0.2-0.6 |0.11-0.17| 3.0-5.9 | 0.2-1.0 | .37 | .43 | | |

 | 24-60 | 25-40|1.40-1.70| 0.2-0.6 |0.08-0.18| 3.0-5.9 | 0.2-1.0 | .37 | .43 | | |

 | | | | | | | | | | | |

872B: | | | | | | | | | | | |

 Rapatee----------| 0-3 | 24-35|1.25-1.60| 0.2-0.6 |0.15-0.20| 0.0-2.9 | 2.0-4.0 | .37 | .37 | 5 | 6 | 48

 | 3-48 | 15-35|1.50-1.90| 0.06-0.6 |0.08-0.15| 3.0-5.9 | 0.0-2.5 | .37 | .43 | | |

 | 48-60 | 15-35|1.60-1.90|0.0015-0.06 |0.03-0.18| 0.0-2.9 | 0.0-0.8 | .37 | .43 | | |

 | | | | | | | | | | | |

901B: | | | | | | | | | | | |

 Ipava------------| 0-20 | 20-27|1.15-1.35| 0.6-2 |0.22-0.24| 3.0-5.9 | 4.0-5.0 | .28 | .28 | 5 | 6 | 48

 | 20-40 | 35-43|1.25-1.50| 0.2-0.6 |0.11-0.20| 6.0-8.9 | 0.5-1.0 | .37 | .37 | | |

 | 40-60 | 20-30|1.30-1.55| 0.2-0.6 |0.20-0.22| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

 Osco-------------| 0-14 | 20-26|1.25-1.30| 0.6-2 |0.22-0.24| 3.0-5.9 | 3.0-4.0 | .28 | .28 | 5 | 6 | 48

 | 14-55 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 55-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

902A: | | | | | | | | | | | |

 Ipava------------| 0-20 | 20-27|1.15-1.35| 0.6-2 |0.22-0.24| 3.0-5.9 | 4.0-5.0 | .28 | .28 | 5 | 6 | 48

 | 20-40 | 35-43|1.25-1.50| 0.2-0.6 |0.11-0.20| 6.0-8.9 | 0.5-1.0 | .37 | .37 | | |

 | 40-60 | 20-30|1.30-1.55| 0.2-0.6 |0.20-0.22| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

 Sable------------| 0-17 | 27-35|1.15-1.35| 0.6-2 |0.21-0.23| 3.0-5.9 | 5.0-6.0 | .24 | .24 | 5 | 6 | 48

 | 17-23 | 27-35|1.20-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 2.0-4.0 | .24 | .24 | | |

 | 23-60 | 24-35|1.30-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.2-1.0 | .37 | .37 | | |

 | | | | | | | | | | | |
322 Soil Survey of

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

3074A: | | | | | | | | | | | |

 Radford----------| 0-12 | 18-27|1.40-1.60| 0.6-2 |0.22-0.24| 0.0-2.9 | 2.0-4.0 | .32 | .32 | 5 | 6 | 48

 | 12-33 | 18-27|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-2.0 | .49 | .49 | | |

 | 33-60 | 24-35|1.35-1.55| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .32 | .32 | | |

 | | | | | | | | | | | |

3107+: | | | | | | | | | | | |

 Sawmill----------| 0-11 | 18-27|1.25-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 4.0-5.0 | .32 | .32 | 5 | 6 | 48

 | 11-36 | 27-35|1.20-1.40| 0.6-2 |0.21-0.23| 3.0-5.9 | 1.0-3.0 | .28 | .28 | | |

 | 36-53 | 25-35|1.30-1.45| 0.6-2 |0.17-0.20| 3.0-5.9 | 0.0-2.0 | .32 | .32 | | |

 | 53-60 | 18-35|1.35-1.50| 0.6-2 |0.15-0.19| 3.0-5.9 | 0.0-1.0 | .28 | .28 | | |

 | | | | | | | | | | | |

3415A: | | | | | | | | | | | |

 Orion------------| 0-7 | 10-18|1.20-1.30| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 5 | 56

 | 7-22 | 9-18|1.20-1.30| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .55 | .55 | | |

 | 22-60 | 10-30|1.25-1.45| 0.6-2 |0.18-0.22| 0.0-2.9 | 3.0-8.0 | .37 | .37 | | |

 | 60-80 | 9-18|1.20-1.40| 0.6-2 |0.18-0.22| 0.0-2.9 | 0.0-0.5 | .37 | .37 | | |

 | | | | | | | | | | | |

3451A: | | | | | | | | | | | |

 Lawson-----------| 0-14 | 10-27|1.20-1.55| 0.6-2 |0.22-0.24| 0.0-2.9 | 2.0-4.0 | .32 | .32 | 5 | 5 | 56

 | 14-33 | 10-30|1.20-1.55| 0.6-2 |0.18-0.22| 0.0-2.9 | 2.0-4.0 | .32 | .32 | | |

 | 33-80 | 18-30|1.55-1.65| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .49 | .49 | | |

 | | | | | | | | | | | |

7081B: | | | | | | | | | | | |

 Littleton--------| 0-6 | 18-27|1.20-1.45| 0.6-2 |0.20-0.24| 0.0-2.9 | 3.0-4.0 | .32 | .32 | 5 | 6 | 48

 | 6-32 | 22-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.5-2.0 | .49 | .49 | | |

 | 32-60 | 18-27|1.20-1.40| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.0-1.0 | .49 | .49 | | |

 | | | | | | | | | | | |

7104A: | | | | | | | | | | | |

 Virgil-----------| 0-8 | 15-27|1.15-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 2.0-4.0 | .32 | .32 | 5 | 6 | 48

 | 8-13 | 15-27|1.15-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.2-0.5 | .43 | .43 | | |

 | 13-19 | 15-32|1.15-1.35| 0.6-2 |0.22-0.24| 0.0-2.9 | 0.2-1.0 | .32 | .32 | | |

 | 19-47 | 27-35|1.35-1.55| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.2-1.0 | .37 | .37 | | |

 | 47-55 | 15-27|1.35-1.55| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.2-0.5 | .32 | .32 | | |

 | 55-63 | 15-30|1.45-1.75| 0.6-6 |0.05-0.11| 0.0-2.9 | 0.2-0.5 | .28 | .32 | | |

 | | | | | | | | | | | |

8077A: | | | | | | | | | | | |

 Huntsville-------| 0-27 | 18-27|1.15-1.35| 0.6-2 |0.22-0.24| 3.0-5.9 | 3.0-4.0 | .32 | .32 | 5 | 6 | 48

 | 27-54 | 18-27|1.20-1.40| 0.6-2 |0.20-0.22| 3.0-5.9 | 0.5-1.0 | .32 | .32 | | |

 | 52-80 | 10-25|1.20-1.50| 0.6-2 |0.17-0.21| 0.0-2.9 | 0.2-1.0 | .49 | .49 | | |

 | | | | | | | | | | | |

8239A: | | | | | | | | | | | |

 Dorchester-------| 0-6 | 11-30|1.20-1.30| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.5-2.0 | .37 | .37 | 5 | 4L | 86

 | 6-60 | 18-30|1.25-1.40| 0.6-2 |0.22-0.24| 3.0-5.9 | 1.0-4.0 | .37 | .37 | | |

 | | | | | | | | | | | |

9017A: | | | | | | | | | | | |

 Keomah-----------| 0-9 | 16-26|1.30-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 9-16 | 16-26|1.35-1.45| 0.2-0.6 |0.18-0.20| 0.0-2.9 | 0.2-1.0 | .49 | .49 | | |

 | 16-49 | 35-42|1.30-1.45| 0.06-0.6 |0.18-0.20| 6.0-8.9 | 0.0-0.5 | .37 | .37 | | |

 | 49-80 | 24-38|1.40-1.55| 0.2-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .43 | .43 | | |

 | | | | | | | | | | | |

9086B: | | | | | | | | | | | |

 Osco-------------| 0-14 | 20-26|1.25-1.30| 0.6-2 |0.22-0.24| 3.0-5.9 | 3.0-4.0 | .28 | .28 | 5 | 6 | 48

 | 14-55 | 24-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 55-60 | 20-30|1.35-1.40| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

9257A: | | | | | | | | | | | |

 Clarksdale-------| 0-10 | 20-27|1.30-1.50| 0.6-2 |0.22-0.25| 3.0-5.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 10-16 | 15-27|1.25-1.50| 0.2-0.6 |0.20-0.22| 0.0-2.9 | 0.0-1.0 | .43 | .43 | | |

 | 16-46 | 35-45|1.30-1.50| 0.2-0.6 |0.11-0.20| 6.0-8.9 | 0.0-0.5 | .37 | .37 | | |

 | 46-80 | 20-30|1.40-1.60| 0.2-2 |0.20-0.22| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |
Knox County, Illinois 323

Table 19.--Physical Properties of the Soils--Continued

_____________________________________________________________________________________________________________________

 | | | | | | | |Erosion factors|Wind |Wind

 Map symbol | Depth | Clay | Moist | Permea- |Available| Linear | Organic |_______________|erodi-|erodi-

 and soil name | | | bulk | bility | water |extensi- | matter | | | |bility|bility

 | | | density | (Ksat) |capacity | bility | | Kw | Kf | T |group |index _____________________________________________________________________________________________________________________

 | In | Pct | g/cc | In/hr | In/in | Pct | Pct | | | | |

 | | | | | | | | | | | |

9279B: | | | | | | | | | | | |

 Rozetta----------| 0-9 | 15-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 9-66 | 27-35|1.35-1.55| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.2-0.5 | .37 | .37 | | |

 | 66-76 | 20-30|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.2-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

9279C2: | | | | | | | | | | | |

 Rozetta----------| 0-7 | 15-27|1.20-1.40| 0.6-2 |0.22-0.24| 0.0-2.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 7-66 | 27-35|1.35-1.55| 0.6-2 |0.18-0.22| 3.0-5.9 | 0.2-0.5 | .37 | .37 | | |

 | 66-70 | 20-30|1.40-1.60| 0.6-2 |0.20-0.22| 0.0-2.9 | 0.2-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

9280B: | | | | | | | | | | | |

 Fayette----------| 0-9 | 15-27|1.30-1.35| 0.6-2 |0.20-0.22| 0.0-2.9 | 1.0-3.0 | .43 | .43 | 5 | 6 | 48

 | 9-39 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-1.0 | .37 | .37 | | |

 | 39-60 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

9280C2: | | | | | | | | | | | |

 Fayette----------| 0-8 | 25-27|1.35-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 1.0-2.0 | .43 | .43 | 5 | 6 | 48

 | 8-64 | 25-35|1.30-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .37 | .37 | | |

 | 64-80 | 22-26|1.45-1.50| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

9675B: | | | | | | | | | | | |

 Greenbush--------| 0-14 | 18-25|1.25-1.30| 0.6-2 |0.21-0.23| 0.0-2.9 | 2.0-3.0 | .37 | .37 | 5 | 6 | 48

 | 14-60 | 26-35|1.30-1.35| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.5-1.0 | .37 | .37 | | |

 | 60-80 | 18-27|1.35-1.45| 0.6-2 |0.18-0.20| 3.0-5.9 | 0.0-0.5 | .49 | .49 | | |

 | | | | | | | | | | | |

M-W. | | | | | | | | | | | |

 Miscellaneous | | | | | | | | | | | |

 water | | | | | | | | | | | |

 | | | | | | | | | | | |

W. | | | | | | | | | | | |

 Water | | | | | | | | | | | |

 | | | | | | | | | | | | _____________________________________________________________________________________________________________________
324 Soil Survey of

Table 20.--Chemical Properties of the Soils

(Absence of an entry indicates that data were not estimated)

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

7D3: | | | |

 Atlas----------------| 0-4 | 19-26 | 4.5-7.3 | 0

 | 4-66 | 18-29 | 4.5-7.8 | 0-25

 | 66-80 | 12-20 | 6.1-7.8 | 0-25

 | | | |

8D2: | | | |

 Hickory--------------| 0-6 | 14-19 | 4.5-7.3 | 0

 | 6-51 | 14-18 | 4.5-7.3 | 0

 | 51-60 | 9-19 | 5.1-8.4 | 0-25

 | | | |

8F: | | | |

 Hickory--------------| 0-4 | 14-19 | 4.5-7.3 | 0

 | 4-12 | 9-14 | 4.5-7.3 | 0

 | 12-53 | 12-19 | 4.5-7.3 | 0

 | 53-58 | 9-19 | 5.1-7.8 | 0-15

 | 58-63 | 5-15 | 5.6-8.4 | 0-25

 | | | |

8F2: | | | |

 Hickory--------------| 0-12 | 14-19 | 4.5-7.3 | 0

 | 12-46 | 16-22 | 4.5-7.3 | 0

 | 46-72 | 9-19 | 5.1-7.8 | 0-25

 | | | |

8G: | | | |

 Hickory--------------| 0-4 | 14-19 | 4.5-7.3 | 0

 | 4-12 | 9-14 | 4.5-7.3 | 0

 | 12-40 | 12-19 | 4.5-7.3 | 0

 | 40-58 | 9-19 | 5.1-7.8 | 0-15

 | 58-63 | 5-15 | 5.6-8.4 | 0-25

 | | | |

17A: | | | |

 Keomah---------------| 0-11 | 10-26 | 5.1-7.3 | 0

 | 11-18 | 9-24 | 5.1-7.3 | 0

 | 18-33 | 28-41 | 5.1-6.5 | 0

 | 33-51 | 16-29 | 5.6-7.3 | 0

 | 51-89 | 8-18 | 6.1-7.3 | 0-15

 | | | |

19C3: | | | |

 Sylvan---------------| 0-7 | 17-21 | 5.6-7.3 | 0

 | 7-37 | 15-22 | 5.6-7.3 | 0

 | 37-60 | 6-18 | 6.6-8.4 | 0-35

 | | | |

19D3: | | | |

 Sylvan---------------| 0-9 | 17-21 | 5.6-7.3 | 0

 | 9-28 | 15-22 | 5.6-7.3 | 0

 | 28-60 | 6-18 | 6.6-8.4 | 0-35

 | | | |

43A: | | | |

 Ipava----------------| 0-20 | 20-27 | 5.6-7.3 | 0

 | 20-40 | 22-27 | 5.6-7.8 | 0

 | 40-60 | 12-19 | 6.1-8.4 | 0

 | | | |

45A: | | | |

 Denny----------------| 0-9 | 18-24 | 5.6-7.3 | 0

 | 9-22 | 9-15 | 5.6-6.5 | 0

 | 22-45 | 21-29 | 5.6-6.5 | 0

 | 45-60 | 15-21 | 5.6-7.8 | 0

 | | | |
Knox County, Illinois 325

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

68A: | | | |

 Sable----------------| 0-17 | 26-33 | 5.6-7.3 | 0

 | 17-23 | 20-30 | 5.6-7.3 | 0

 | 23-60 | 15-23 | 5.6-7.8 | 0

 | | | |

86B: | | | |

 Osco-----------------| 0-14 | 18-25 | 5.1-7.3 | 0

 | 14-55 | 15-23 | 5.1-6.5 | 0

 | 55-60 | 12-18 | 5.6-7.3 | 0-15

 | | | |

86B2: | | | |

 Osco-----------------| 0-8 | 18-25 | 5.1-7.3 | 0

 | 8-42 | 15-23 | 5.1-6.5 | 0

 | 42-51 | 12-18 | 5.1-6.5 | 0

 | 51-60 | 12-18 | 5.6-7.8 | 0-15

 | | | |

86C: | | | |

 Osco-----------------| 0-14 | 18-25 | 5.1-7.3 | 0

 | 14-43 | 15-23 | 5.1-6.5 | 0

 | 43-60 | 12-18 | 5.6-7.3 | 0

 | | | |

86C2: | | | |

 Osco-----------------| 0-9 | 18-25 | 5.1-7.3 | 0

 | 9-34 | 15-23 | 5.1-6.5 | 0

 | 34-60 | 12-18 | 5.1-7.3 | 0-15

 | | | |

86D2: | | | |

 Osco-----------------| 0-8 | 18-25 | 5.1-7.3 | 0

 | 8-51 | 15-23 | 5.1-6.5 | 0

 | 51-60 | 12-18 | 5.6-7.3 | 0-15

 | | | |

119D2: | | | |

 Elco-----------------| 0-6 | 14-22 | 5.6-7.3 | 0

 | 6-28 | 14-22 | 5.1-7.8 | 0

 | 28-60 | 15-27 | 5.1-7.8 | 0

 | | | |

119E2: | | | |

 Elco-----------------| 0-2 | 14-22 | 5.6-7.3 | 0

 | 2-9 | 14-22 | 5.6-7.3 | 0

 | 9-32 | 14-22 | 5.1-7.8 | 0

 | 32-60 | 15-27 | 5.1-7.8 | 0

 | | | |

131B: | | | |

 Alvin----------------| 0-4 | 7-11 | 4.5-7.3 | 0

 | 4-10 | 6-10 | 4.5-7.3 | 0

 | 10-42 | 9-14 | 4.5-7.3 | 0

 | 42-60 | 2-5 | 5.1-8.4 | 0-25

 | | | |

131D: | | | |

 Alvin----------------| 0-5 | 7-11 | 4.5-7.3 | 0

 | 5-20 | 6-10 | 4.5-7.3 | 0

 | 20-45 | 9-14 | 4.5-7.3 | 0

 | 45-60 | 2-5 | 5.1-8.4 | 0-25

 | | | |

131F: | | | |

 Alvin----------------| 0-3 | 7-11 | 4.5-7.3 | 0

 | 3-9 | 6-10 | 4.5-7.3 | 0

 | 9-40 | 9-14 | 4.5-7.3 | 0

 | 40-60 | 2-5 | 5.1-8.4 | 0-25

 | | | |
326 Soil Survey of

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

134B: | | | |

 Camden---------------| 0-9 | 10-20 | 5.1-7.3 | 0

 | 9-15 | 10-20 | 5.1-7.3 | 0

 | 15-34 | 13-22 | 5.1-7.3 | 0

 | 34-40 | 10-19 | 5.1-7.3 | 0

 | 40-60 | 3-12 | 5.1-8.4 | 0-5

 | | | |

134C2: | | | |

 Camden---------------| 0-7 | 11-29 | 5.1-7.3 | 0

 | 7-34 | 15-29 | 5.1-7.3 | 0

 | 34-43 | 9-20 | 5.1-7.3 | 0

 | 43-80 | 2-10 | 6.1-7.8 | 0-25

 | | | |

134D2: | | | |

 Camden---------------| 0-7 | 11-29 | 5.1-7.3 | 0

 | 7-34 | 15-29 | 5.1-7.3 | 0

 | 34-43 | 9-20 | 5.1-7.3 | 0

 | 43-80 | 2-10 | 6.1-7.8 | 0-25

 | | | |

249A: | | | |

 Edinburg-------------| 0-16 | 22-29 | 5.6-7.8 | 0

 | 16-55 | 21-28 | 5.6-7.3 | 0

 | 55-60 | 13-18 | 6.6-7.8 | 0-5

 | | | |

257A: | | | |

 Clarksdale-----------| 0-8 | 10-22 | 5.1-7.3 | 0

 | 8-16 | 9-18 | 5.1-7.3 | 0

 | 16-47 | 21-28 | 5.1-7.3 | 0

 | 47-67 | 12-19 | 6.1-8.4 | 0-15

 | 67-80 | 12-18 | 6.1-8.4 | 0-15

 | | | |

259C2: | | | |

 Assumption-----------| 0-8 | 18-24 | 5.6-7.3 | 0

 | 8-24 | 15-23 | 5.1-7.3 | 0

 | 24-60 | 15-22 | 5.1-7.3 | 0

 | | | |

259D2: | | | |

 Assumption-----------| 0-7 | 18-24 | 5.6-7.3 | 0

 | 7-28 | 15-23 | 5.1-7.3 | 0

 | 28-60 | 18-28 | 5.1-7.3 | 0

 | | | |

259D3: | | | |

 Assumption-----------| 0-8 | 18-25 | 5.6-7.3 | 0

 | 8-29 | 15-23 | 5.1-7.3 | 0

 | 29-60 | 18-28 | 5.1-7.3 | 0

 | | | |

279B: | | | |

 Rozetta--------------| 0-7 | 10-22 | 5.1-7.3 | 0

 | 7-11 | 7-17 | 4.5-7.3 | 0

 | 11-55 | 16-22 | 4.5-6.0 | 0

 | 55-60 | 12-17 | 5.6-7.8 | 0-15

 | | | |

279C2: | | | |

 Rozetta--------------| 0-8 | 10-22 | 5.1-7.3 | 0

 | 8-56 | 16-22 | 4.5-6.0 | 0

 | 56-80 | 12-17 | 5.6-7.8 | 0-15

 | | | |

280B: | | | |

 Fayette--------------| 0-9 | 15-20 | 5.1-7.3 | 0

 | 9-39 | 15-23 | 4.5-6.0 | 0

 | 39-60 | 15-20 | 5.1-7.8 | 0-15

 | | | |
Knox County, Illinois 327

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

280C2: | | | |

 Fayette--------------| 0-8 | 18-25 | 5.1-7.3 | 0

 | 8-64 | 15-22 | 4.5-6.0 | 0

 | 64-80 | 15-20 | 5.1-7.8 | 0-15

 | | | |

280D2: | | | |

 Fayette--------------| 0-6 | 18-25 | 5.1-7.3 | 0

 | 6-48 | 15-22 | 4.5-6.0 | 0

 | 48-60 | 15-20 | 5.1-7.8 | 0-15

 | | | |

280F: | | | |

 Fayette--------------| 0-3 | 18-25 | 5.1-7.3 | 0

 | 3-10 | 7-17 | 4.5-7.3 | 0

 | 10-45 | 15-20 | 4.5-6.0 | 0

 | 45-60 | 15-20 | 5.1-7.8 | 0-15

 | | | |

344B: | | | |

 Harvard--------------| 0-7 | 16-22 | 5.1-7.8 | 0

 | 7-37 | 15-22 | 5.1-7.3 | 0

 | 37-45 | 9-22 | 5.6-7.8 | 0-5

 | 45-60 | 3-19 | 5.1-8.4 | 0-20

 | | | |

536. | | | |

 Dumps | | | |

 | | | |

549D2: | | | |

 Marseilles-----------| 0-5 | 14-22 | 5.1-6.5 | 0

 | 5-27 | 16-27 | 4.5-6.5 | 0

 | 27-60 | --- | --- | ---

 | | | |

549F: | | | |

 Marseilles-----------| 0-10 | 14-22 | 5.1-6.5 | 0

 | 10-35 | 14-23 | 4.5-6.5 | 0

 | 35-60 | --- | --- | ---

 | | | |

549G: | | | |

 Marseilles-----------| 0-10 | 14-22 | 5.1-6.5 | 0

 | 10-35 | 14-23 | 4.5-6.5 | 0

 | 35-60 | --- | --- | ---

 | | | |

567B2: | | | |

 Elkhart--------------| 0-8 | 18-27 | 5.6-7.8 | 0

 | 8-30 | 15-22 | 5.6-8.4 | 0-20

 | 30-60 | 12-21 | 7.4-8.4 | 10-40

 | | | |

567C2: | | | |

 Elkhart--------------| 0-8 | 18-27 | 5.6-7.8 | 0

 | 8-25 | 15-22 | 5.6-8.4 | 0-20

 | 25-60 | 12-21 | 7.4-8.4 | 10-40

 | | | |

567D2: | | | |

 Elkhart--------------| 0-10 | 16-24 | 5.6-7.8 | 0

 | 10-30 | 15-22 | 5.6-8.4 | 0-20

 | 30-60 | 12-21 | 7.4-8.4 | 10-40

 | | | |

567D3: | | | |

 Elkhart--------------| 0-7 | 18-27 | 5.6-7.8 | 0

 | 7-21 | 15-22 | 5.6-8.4 | 0-20

 | 21-60 | 12-21 | 7.4-8.4 | 10-40

 | | | |
328 Soil Survey of

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

660C2: | | | |

 Coatsburg------------| 0-10 | 18-26 | 5.1-7.8 | 0

 | 10-80 | 21-29 | 5.1-6.5 | 0

 | | | |

675B: | | | |

 Greenbush------------| 0-14 | 20-25 | 5.1-7.3 | 0

 | 14-60 | 25-30 | 4.5-7.3 | 0

 | 60-80 | 20-25 | 5.6-7.3 | 0

 | | | |

801B: | | | |

 Orthents-------------| 0-80 | 10-25 | 5.1-7.8 | 0-10

 | | | |

802B: | | | |

 Orthents-------------| 0-6 | 10-25 | 5.6-7.8 | 0-10

 | 6-60 | 10-20 | 5.6-7.8 | 0-20

 | | | |

835G: | | | |

 Earthen dams | | | |

 | | | |

863, 864, 865. | | | |

 Pits | | | |

 | | | |

871B: | | | |

 Lenzburg-------------| 0-2 | 17-29 | 6.6-8.4 | 0-20

 | 2-17 | 15-29 | 7.4-8.4 | 0-26

 | 17-60 | 12-23 | 7.4-8.4 | 0-25

 | | | |

871D: | | | |

 Lenzburg-------------| 0-2 | 17-29 | 6.6-8.4 | 0-20

 | 2-17 | 15-29 | 7.4-8.4 | 0-26

 | 17-60 | 12-23 | 7.4-8.4 | 0-25

 | | | |

871G: | | | |

 Lenzburg-------------| 0-3 | 17-29 | 6.6-8.4 | 0-20

 | 3-24 | 15-29 | 7.4-8.4 | 0-25

 | 24-60 | 12-23 | 7.4-8.4 | 0-26

 | | | |

872B: | | | |

 Rapatee--------------| 0-3 | 20-35 | 6.1-7.3 | 0-1

 | 3-48 | 10-30 | 6.6-8.4 | 0-15

 | 48-60 | 10-25 | 6.6-8.4 | 0-10

 | | | |

901B: | | | |

 Ipava----------------| 0-20 | 20-27 | 5.6-7.3 | 0

 | 20-40 | 22-27 | 5.6-7.8 | 0

 | 40-60 | 12-19 | 6.1-8.4 | 0

 | | | |

 Osco-----------------| 0-14 | 18-25 | 5.1-7.3 | 0

 | 14-55 | 15-23 | 5.1-6.5 | 0

 | 55-60 | 12-18 | 5.6-7.3 | 0-15

 | | | |

902A: | | | |

 Ipava----------------| 0-20 | 20-27 | 5.6-7.3 | 0

 | 20-40 | 22-27 | 5.6-7.8 | 0

 | 40-60 | 12-19 | 6.1-8.4 | 0

 | | | |

 Sable----------------| 0-17 | 26-33 | 5.6-7.3 | 0

 | 17-23 | 20-30 | 5.6-7.3 | 0

 | 23-60 | 15-23 | 5.6-7.8 | 0
Knox County, Illinois 329

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

3074A: | | | |

 Radford--------------| 0-12 | 15-24 | 5.6-7.8 | 0

 | 12-33 | 11-20 | 6.1-7.8 | 0

 | 33-60 | 14-23 | 6.1-7.8 | 0-20

 | | | |

3107+: | | | |

 Sawmill--------------| 0-11 | 19-26 | 6.1-7.8 | 0

 | 11-36 | 17-27 | 6.1-7.8 | 0

 | 36-53 | 16-25 | 6.1-7.8 | 0-10

 | 53-60 | 11-22 | 6.1-8.4 | 0-30

 | | | |

3415A: | | | |

 Orion----------------| 0-7 | 7-20 | 5.6-7.8 | 0

 | 7-22 | 7-20 | 5.6-7.8 | 0

 | 22-60 | 10-35 | 5.6-7.8 | 0

 | 60-80 | 5-15 | 5.6-7.8 | 0

 | | | |

3451A: | | | |

 Lawson---------------| 0-14 | 11-28 | 6.1-7.8 | 0

 | 14-33 | 11-29 | 6.1-7.8 | 0

 | 33-80 | 11-23 | 6.1-7.8 | 0

 | | | |

7081B: | | | |

 Littleton------------| 0-6 | 11-28 | 5.6-7.8 | 0

 | 6-32 | 11-29 | 5.6-7.8 | 0

 | 32-60 | 11-23 | 5.6-7.8 | 0

 | | | |

7104A: | | | |

 Virgil---------------| 0-8 | 13-24 | 6.1-7.8 | 0

 | 8-13 | 9-17 | 5.1-7.3 | 0

 | 13-19 | 13-24 | 6.1-7.8 | 0

 | 19-47 | 16-23 | 5.1-7.8 | 0

 | 47-55 | 16-23 | 5.1-7.8 | 0

 | 55-63 | 9-20 | 5.6-8.4 | 0-20

 | | | |

8077A: | | | |

 Huntsville-----------| 0-27 | 17-24 | 5.6-7.8 | 0

 | 27-54 | 11-17 | 5.6-7.8 | 0

 | 52-80 | 6-17 | 5.6-7.8 | 0-5

 | | | |

8239A: | | | |

 Dorchester-----------| 0-6 | 15-20 | 7.4-8.4 | 5-30

 | 6-60 | 15-20 | 6.6-8.4 | 0-15

 | | | |

9017A: | | | |

 Keomah---------------| 0-9 | 15-20 | 4.5-7.3 | 0

 | 9-16 | 15-20 | 4.5-7.3 | 0

 | 16-49 | 25-30 | 4.5-5.5 | 0

 | 49-80 | 15-20 | 5.1-7.3 | 0

 | | | |

9086B: | | | |

 Osco-----------------| 0-14 | 18-25 | 5.1-7.3 | 0

 | 14-55 | 15-23 | 5.1-7.3 | 0

 | 55-60 | 12-18 | 5.6-7.3 | 0

 | | | |

9257A: | | | |

 Clarksdale-----------| 0-10 | 10-22 | 5.1-7.3 | 0

 | 10-16 | 9-18 | 5.1-6.5 | 0

 | 16-46 | 21-28 | 5.1-7.3 | 0

 | 46-80 | 12-19 | 6.1-8.4 | 0-15

 | | | |
330 Soil Survey of

Table 20.--Chemical Properties of the Soils--Continued

_____________________________________________________________

 | | | |

 Map symbol | Depth | Cation- | Soil | Calcium

 and soil name | |exchange |reaction |carbonate

 | |capacity | | _____________________________________________________________

 | In |meq/100 g| pH | Pct

 | | | |

9279B: | | | |

 Rozetta--------------| 0-9 | 10-22 | 5.1-7.3 | 0

 | 9-66 | 16-22 | 4.5-6.0 | 0

 | 66-76 | 12-17 | 5.6-7.8 | 0-15

 | | | |

9279C2: | | | |

 Rozetta--------------| 0-7 | 10-22 | 5.1-7.3 | 0

 | 7-66 | 16-22 | 4.5-6.0 | 0

 | 66-70 | 12-17 | 5.6-7.8 | 0-15

 | | | |

9280B: | | | |

 Fayette--------------| 0-9 | 15-20 | 5.1-7.3 | 0

 | 9-39 | 15-20 | 4.5-6.5 | 0

 | 39-60 | 15-20 | 5.1-7.8 | 0-15

 | | | |

9280C2: | | | |

 Fayette--------------| 0-8 | 18-25 | 5.1-7.3 | 0

 | 8-64 | 15-20 | 4.5-6.0 | 0

 | 64-80 | 15-20 | 5.1-7.8 | 0-15

 | | | |

9675B: | | | |

 Greenbush------------| 0-14 | 20-25 | 5.1-7.3 | 0

 | 14-60 | 25-30 | 4.5-7.3 | 0

 | 60-80 | 20-25 | 5.6-7.3 | 0

 | | | |

M-W. | | | |

 Miscellaneous water | | | |

 | | | |

W. | | | |

 Water | | | |

 | | | | _____________________________________________________________
Knox County, Illinois 331

Table 21.--Water Features

(See text for definitions of terms used in this table. Absence of an entry indicates that the feature is not a

 concern or that data were not estimated)

____________________________________________________________________________________________________________________

 | | Annual ponding | Annual flooding | Water table _____________________________________________________________________________________

 Map symbol |Hydro-|Surface| Duration |Frequency | Duration |Frequency | Months | Upper | Lower |Kind of

 and soil name |logic | water | | | | | | limit | limit | water

 |group | depth | | | | | | | | table ____________________________________________________________________________________________________________________

 | | Ft | | | | | | Ft | Ft |

 | | | | | | | | | |

7D3: | | | | | | | | | |

 Atlas-----------------| D | --- | --- | --- | --- | None |Jan-May |0.5-2.0|1.2-2.5|Perched

 | | | | | | | | | |

8D2: | | | | | | | | | |

 Hickory---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

8F: | | | | | | | | | |

 Hickory---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

8F2: | | | | | | | | | |

 Hickory---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

8G: | | | | | | | | | |

 Hickory---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

17A: | | | | | | | | | |

 Keomah----------------| C | --- | --- | --- | --- | None |Jan-May |0.5-2.0| >6.0 |Apparent

 | | | | | | | | | |

19C3: | | | | | | | | | |

 Sylvan----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

19D3: | | | | | | | | | |

 Sylvan----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

43A: | | | | | | | | | |

 Ipava-----------------| B | --- | --- | --- | --- | None |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

45A: | | | | | | | | | |

 Denny-----------------| D |0.0-1.0| Brief | Frequent | --- | None |Jan-May | 0.0 | >6.0 |Apparent

 | | | | | | | | | |

68A: | | | | | | | | | |

 Sable-----------------| B/D |0.0-0.5| Brief |Occasional| --- | None |Jan-May |0.0-1.0| >6.0 |Apparent

 | | | | | | | | | |

86B: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

86B2: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

86C: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

86C2: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

86D2: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

119D2: | | | | | | | | | |

 Elco------------------| B | --- | --- | --- | --- | None |Feb-Apr |2.0-3.5|2.8-4.5|Perched

 | | | | | | | | | |

119E2: | | | | | | | | | |

 Elco------------------| B | --- | --- | --- | --- | None |Feb-Apr |2.0-3.5|2.8-4.5|Perched

 | | | | | | | | | |
332 Soil Survey of

Table 21.--Water Features--Continued

____________________________________________________________________________________________________________________

 | | Annual ponding | Annual flooding | Water table _____________________________________________________________________________________

 Map symbol |Hydro-|Surface| Duration |Frequency | Duration |Frequency | Months | Upper | Lower |Kind of

 and soil name |logic | water | | | | | | limit | limit | water

 |group | depth | | | | | | | | table ____________________________________________________________________________________________________________________

 | | Ft | | | | | | Ft | Ft |

 | | | | | | | | | |

131B: | | | | | | | | | |

 Alvin-----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

131D: | | | | | | | | | |

 Alvin-----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

131F: | | | | | | | | | |

 Alvin-----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

134B: | | | | | | | | | |

 Camden----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

134C2: | | | | | | | | | |

 Camden----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

134D2: | | | | | | | | | |

 Camden----------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

249A: | | | | | | | | | |

 Edinburg--------------| C/D |0.0-0.5| Brief | Frequent | --- | None |Jan-May |0.0-1.0| >6.0 |Apparent

 | | | | | | | | | |

257A: | | | | | | | | | |

 Clarksdale------------| C | --- | --- | --- | --- | None |Jan-May |0.5-2.0| >6.0 |Apparent

 | | | | | | | | | |

259C2: | | | | | | | | | |

 Assumption------------| B | --- | --- | --- | --- | None |Feb-Apr |2.0-3.5|2.8-4.5|Perched

 | | | | | | | | | |

259D2: | | | | | | | | | |

 Assumption------------| B | --- | --- | --- | --- | None |Feb-Apr |2.0-3.5|2.8-4.5|Perched

 | | | | | | | | | |

259D3: | | | | | | | | | |

 Assumption------------| B | --- | --- | --- | --- | None |Feb-Apr |2.0-3.5|2.8-4.5|Perched

 | | | | | | | | | |

279B: | | | | | | | | | |

 Rozetta---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

279C2: | | | | | | | | | |

 Rozetta---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

280B: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

280C2: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

280D2: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

280F: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

344B: | | | | | | | | | |

 Harvard---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

536. | | | | | | | | | |

 Dumps | | | | | | | | | |

 | | | | | | | | | |

549D2: | | | | | | | | | |

 Marseilles------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |
Knox County, Illinois 333

Table 21.--Water Features--Continued

____________________________________________________________________________________________________________________

 | | Annual ponding | Annual flooding | Water table _____________________________________________________________________________________

 Map symbol |Hydro-|Surface| Duration |Frequency | Duration |Frequency | Months | Upper | Lower |Kind of

 and soil name |logic | water | | | | | | limit | limit | water

 |group | depth | | | | | | | | table ____________________________________________________________________________________________________________________

 | | Ft | | | | | | Ft | Ft |

 | | | | | | | | | |

549F: | | | | | | | | | |

 Marseilles------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

549G: | | | | | | | | | |

 Marseilles------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

567B2: | | | | | | | | | |

 Elkhart---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

567C2: | | | | | | | | | |

 Elkhart---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

567D2: | | | | | | | | | |

 Elkhart---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

567D3: | | | | | | | | | |

 Elkhart---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

660C2: | | | | | | | | | |

 Coatsburg-------------| D | --- | --- | --- | --- | None |Jan-May |0.0-1.0|0.5-2.5|Perched

 | | | | | | | | | |

675B: | | | | | | | | | |

 Greenbush-------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

801B: | | | | | | | | | |

 Orthents--------------| B | --- | --- | --- | --- | None |Jan-May |1.0-3.0| >6.0 |Apparent

 | | | | | | | | | |

802B: | | | | | | | | | |

 Orthents--------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

835G. | | | | | | | | | |

 Earthen dams | | | | | | | | | |

 | | | | | | | | | |

863, 864, 865. | | | | | | | | | |

 Pits | | | | | | | | | |

 | | | | | | | | | |

871B: | | | | | | | | | |

 Lenzburg--------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

871D: | | | | | | | | | |

 Lenzburg--------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

871G: | | | | | | | | | |

 Lenzburg--------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

872B: | | | | | | | | | |

 Rapatee---------------| D | --- | --- | --- | --- | None |Feb-Apr |3.5-5.0|4.5-6.0|Perched

 | | | | | | | | | |

901B: | | | | | | | | | |

 Ipava-----------------| B | --- | --- | --- | --- | None |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

902A: | | | | | | | | | |

 Ipava-----------------| B | --- | --- | --- | --- | None |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

 Sable-----------------| B/D |0.0-0.5| Brief |Occasional| --- | None |Jan-May | 0.0 | >6.0 |Apparent

 | | | | | | | | | |

3074A: | | | | | | | | | |

 Radford---------------| B | --- | --- | --- | Brief | Frequent |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |
334 Soil Survey of

Table 21.--Water Features--Continued

____________________________________________________________________________________________________________________

 | | Annual ponding | Annual flooding | Water table _____________________________________________________________________________________

 Map symbol |Hydro-|Surface| Duration |Frequency | Duration |Frequency | Months | Upper | Lower |Kind of

 and soil name |logic | water | | | | | | limit | limit | water

 |group | depth | | | | | | | | table ____________________________________________________________________________________________________________________

 | | Ft | | | | | | Ft | Ft |

 | | | | | | | | | |

3107+: | | | | | | | | | |

 Sawmill---------------| B/D | --- | --- | --- | Brief | Frequent |Jan-May |0.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

3415A: | | | | | | | | | |

 Orion-----------------| C | --- | --- | --- | Brief | Frequent |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

3451A: | | | | | | | | | |

 Lawson----------------| B | --- | --- | --- | Brief | Frequent |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

7081B: | | | | | | | | | |

 Littleton-------------| B | --- | --- | --- |Very brief| Rare |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

7104A: | | | | | | | | | |

 Virgil----------------| B | --- | --- | --- |Very brief| Rare |Jan-May |1.0-2.0| >6.0 |Apparent

 | | | | | | | | | |

8077A: | | | | | | | | | |

 Huntsville------------| B | --- | --- | --- | Brief |Occasional|Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

8239A: | | | | | | | | | |

 Dorchester------------| B | --- | --- | --- | Brief |Occasional|Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

9017A: | | | | | | | | | |

 Keomah----------------| C | --- | --- | None | --- | None |Jan-May |0.5-2.0| >6.0 |Apparent

 | | | | | | | | | |

9086B: | | | | | | | | | |

 Osco------------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

9257A: | | | | | | | | | |

 Clarksdale------------| C | --- | --- | None | --- | None |Jan-May |0.5-2.0| >6.0 |Apparent

 | | | | | | | | | |

9279B: | | | | | | | | | |

 Rozetta---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

9279C2: | | | | | | | | | |

 Rozetta---------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

9280B: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

9280C2: | | | | | | | | | |

 Fayette---------------| B | --- | --- | --- | --- | None |Jan-Dec | >6.0 | >6.0 | ---

 | | | | | | | | | |

9675B: | | | | | | | | | |

 Greenbush-------------| B | --- | --- | --- | --- | None |Feb-Apr |4.0-6.0| >6.0 |Apparent

 | | | | | | | | | |

M-W. | | | | | | | | | |

 Miscellaneous water | | | | | | | | | |

 | | | | | | | | | |

W. | | | | | | | | | |

 Water | | | | | | | | | |

 | | | | | | | | | | ____________________________________________________________________________________________________________________
Knox County, Illinois 335

Table 22.--Soil Features

(See text for definitions of terms used in this table. Absence of an entry indicates that

 the feature is not a concern or that data were not estimated)

_________________________________________________________________________________________

 | Restrictive layer | | Risk of corrosion

 Map symbol |_________________________| Potential |_________________________

 and soil name | | Depth | for | Uncoated |

 | Kind |to top |frost action| steel | Concrete _________________________________________________________________________________________

 | | In | | |

 | | | | |

7D3: | | | | |

 Atlas------------------| --- | --- |High |High |Moderate

 | | | | |

8D2: | | | | |

 Hickory----------------| --- | --- |Moderate |Moderate |Moderate

 | | | | |

8F: | | | | |

 Hickory----------------| --- | --- |Moderate |Moderate |Moderate

 | | | | |

8F2: | | | | |

 Hickory----------------| --- | --- |Moderate |Moderate |Moderate

 | | | | |

8G: | | | | |

 Hickory----------------| --- | --- |Moderate |Moderate |Moderate

 | | | | |

17A: | | | | |

 Keomah-----------------| --- | --- |High |High |Moderate

 | | | | |

19C3: | | | | |

 Sylvan-----------------| --- | --- |High |Moderate |Moderate

 | | | | |

19D3: | | | | |

 Sylvan-----------------| --- | --- |High |Moderate |Moderate

 | | | | |

43A: | | | | |

 Ipava------------------| --- | --- |High |High |Moderate

 | | | | |

45A: | | | | |

 Denny------------------| --- | --- |High |High |Moderate

 | | | | |

68A: | | | | |

 Sable------------------| --- | --- |High |High |Low

 | | | | |

86B: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

86B2: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

86C: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

86C2: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

86D2: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

119D2: | | | | |

 Elco-------------------| --- | --- |High |High |Low

 | | | | |

119E2: | | | | |

 Elco-------------------| --- | --- |High |High |Low

 | | | | |

131B: | | | | |

 Alvin------------------| --- | --- |Moderate |Low |Moderate

 | | | | |
336 Soil Survey of

Table 22.--Soil Features--Continued

_________________________________________________________________________________________

 | Restrictive layer | | Risk of corrosion

 Map symbol |_________________________| Potential |_________________________

 and soil name | | Depth | for | Uncoated |

 | Kind |to top |frost action| steel | Concrete _________________________________________________________________________________________

 | | In | | |

 | | | | |

131D: | | | | |

 Alvin------------------| --- | --- |Moderate |Low |High

 | | | | |

131F: | | | | |

 Alvin------------------| --- | --- |Moderate |Low |High

 | | | | |

134B: | | | | |

 Camden-----------------| --- | --- |High |Low |Moderate

 | | | | |

134C2: | | | | |

 Camden-----------------| --- | --- |High |Moderate |Moderate

 | | | | |

134D2: | | | | |

 Camden-----------------| --- | --- |High |Low |Moderate

 | | | | |

249A: | | | | |

 Edinburg---------------| --- | --- |High |High |Moderate

 | | | | |

257A: | | | | |

 Clarksdale-------------| --- | --- |High |High |Moderate

 | | | | |

259C2: | | | | |

 Assumption-------------| --- | --- |High |High |Moderate

 | | | | |

259D2: | | | | |

 Assumption-------------| --- | --- |High |High |Moderate

 | | | | |

259D3: | | | | |

 Assumption-------------| --- | --- |High |High |Moderate

 | | | | |

279B: | | | | |

 Rozetta----------------| --- | --- |High |Moderate |Moderate

 | | | | |

279C2: | | | | |

 Rozetta----------------| --- | --- |High |Moderate |Moderate

 | | | | |

280B: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

280C2: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

280D2: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

280F: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

344B: | | | | |

 Harvard----------------| --- | --- |High |Moderate |Moderate

 | | | | |

536. | | | | |

 Dumps | | | | |

 | | | | |

549D2: | | | | |

 Marseilles-------------|Bedrock (soft) | 20-40 |High |High |Moderate

 | | | | |

549F: | | | | |

 Marseilles-------------|Bedrock (soft) | 20-40 |High |High |Moderate

 | | | | |
Knox County, Illinois 337

Table 22.--Soil Features--Continued

_________________________________________________________________________________________

 | Restrictive layer | | Risk of corrosion

 Map symbol |_________________________| Potential |_________________________

 and soil name | | Depth | for | Uncoated |

 | Kind |to top |frost action| steel | Concrete _________________________________________________________________________________________

 | | In | | |

 | | | | |

549G: | | | | |

 Marseilles-------------|Bedrock (soft) | 20-40 |High |High |Moderate

 | | | | |

567B2: | | | | |

 Elkhart----------------| --- | --- |High |Moderate |Moderate

 | | | | |

567C2: | | | | |

 Elkhart----------------| --- | --- |High |Moderate |Moderate

 | | | | |

567D2: | | | | |

 Elkhart----------------| --- | --- |High |Moderate |Moderate

 | | | | |

567D3: | | | | |

 Elkhart----------------| --- | --- |High |Moderate |Moderate

 | | | | |

660C2: | | | | |

 Coatsburg--------------| --- | --- |High |High |Moderate

 | | | | |

675B: | | | | |

 Greenbush--------------| --- | --- |High |Moderate |Low

 | | | | |

801B: | | | | |

 Orthents---------------| --- | --- |High |High |Moderate

 | | | | |

802B: | | | | |

 Orthents---------------| --- | --- |Moderate |Moderate |Moderate

 | | | | |

835G. | | | | |

 Earthen dams | | | | |

 | | | | |

863, 864, 865. | | | | |

 Pits | | | | |

 | | | | |

871B: | | | | |

 Lenzburg---------------| --- | --- |Moderate |Moderate |Low

 | | | | |

871D: | | | | |

 Lenzburg---------------| --- | --- |Moderate |Moderate |Low

 | | | | |

871G: | | | | |

 Lenzburg---------------| --- | --- |Moderate |Moderate |Low

 | | | | |

872B: | | | | |

 Rapatee----------------| --- | --- |High |Moderate |Low

 | | | | |

901B: | | | | |

 Ipava------------------| --- | --- |High |High |Moderate

 | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

902A: | | | | |

 Ipava------------------| --- | --- |High |High |Moderate

 | | | | |

 Sable------------------| --- | --- |High |High |Low

 | | | | |

3074A: | | | | |

 Radford----------------| --- | --- |High |High |Moderate

 | | | | |

3107+: | | | | |

 Sawmill----------------| --- | --- |High |High |Low

 | | | | |
338

Table 22.--Soil Features--Continued

_________________________________________________________________________________________

 | Restrictive layer | | Risk of corrosion

 Map symbol |_________________________| Potential |_________________________

 and soil name | | Depth | for | Uncoated |

 | Kind |to top |frost action| steel | Concrete _________________________________________________________________________________________

 | | In | | |

 | | | | |

3415A: | | | | |

 Orion------------------| --- | --- |High |High |Low

 | | | | |

3451A: | | | | |

 Lawson-----------------| --- | --- |High |High |Low

 | | | | |

7081B: | | | | |

 Littleton--------------| --- | --- |High |High |Low

 | | | | |

7104A: | | | | |

 Virgil-----------------| --- | --- |High |High |Moderate

 | | | | |

8077A: | | | | |

 Huntsville-------------| --- | --- |High |Low |Low

 | | | | |

8239A: | | | | |

 Dorchester-------------| --- | --- |High |High |Low

 | | | | |

9017A: | | | | |

 Keomah-----------------| --- | --- |High |High |Moderate

 | | | | |

9086B: | | | | |

 Osco-------------------| --- | --- |High |Moderate |Moderate

 | | | | |

9257A: | | | | |

 Clarksdale-------------| --- | --- |High |High |Moderate

 | | | | |

9279B: | | | | |

 Rozetta----------------| --- | --- |High |Moderate |Moderate

 | | | | |

9279C2: | | | | |

 Rozetta----------------| --- | --- |High |Moderate |Moderate

 | | | | |

9280B: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

9280C2: | | | | |

 Fayette----------------| --- | --- |High |Moderate |Moderate

 | | | | |

9675B: | | | | |

 Greenbush--------------| --- | --- |High |Moderate |Moderate

 | | | | |

M-W. | | | | |

 Miscellaneous water | | | | |

 | | | | |

W. | | | | |

 Water | | | | |

 | | | | | _________________________________________________________________________________________