U.S. Department of the Interior 

U.S. Geological Survey

Selected Hydrologic and Water-Quality Data, 

1997 through 1999, for the Lake Traverse 

Reservation/Roberts County Water-Resources 

Investigation in South Dakota

By Ryan F. Thompson

Open-File Report 00-445

Prepared in cooperation with the South Dakota Geological Survey, 

Sisseton-Wahpeton Sioux Tribe, and Roberts County
U.S. Department of the Interior

Bruce Babbitt, Secretary

U.S. Geological Survey

Charles G. Groat, Director

The use of firm, trade, and brand names in this report is for identification purposes only and 

does not constitute endorsement by the U.S. Geological Survey.

Rapid City, South Dakota: 2000

For additional information write to:

District Chief 

U.S. Geological Survey 

1608 Mt. View Road 

Rapid City, SD 57702

Copies of this report can be purchased from:

U.S. Geological Survey 

Branch of Information Services 

Box 25286 

Denver, CO 80225-0286
CONTENTS

Abstract....................................................................... 1

Introduction........................................................................................................................................................................... 1

Description of Study Area........................................................................................................................................... 2

Acknowledgments....................................................................................................................................................... 4

Precipitation Data.................................................................................................................................................................. 4

Well and Test-Hole Data........................................................................................................................................................ 4

Ground-Water Data................................................................................................................................................................ 14

Hydrographs................................................................................................................................................................ 14

Water-Quality Data.................. ................................................................................................................................... 14

Quality-Assurance Data............................................................................................................................................... 28

Surface-Water Data...........................................................................................^^ 29

Streams .......................................................................... 29

Peak-Flow Frequency Estimates ....................................................................................................................... 32

Summary Statistics............................................................................................................................................ 32

Lakes............................................................................................................................................................................ 33

Water Levels...................................................................................................................................................... 33

Flows at Inlets/Outlets....................................................................................................................................... 45

References ............................................................................................................................................................................. 47

Supplemental Information..................................................................................................................................................... 49

FIGURES

1-7. Maps showing:

1. Location of study area.................................................................................................................................. 3

2. Location of precipitation stations within and near study area..................................................................... 5

3. Location of observation wells installed between 1997 and 1999 for the study........................................... 8

4. Location of test holes drilled between 1997 and 1999 for the study........................................................... 9

5. Location of selected observation wells in and near study area, which were part of

the water-level monitoring program............................................................................................................ 22

6. Location of ground-water sites sampled during 1997-99............................................................................ 23

7. Drainage basins and location of active streamflow-gaging stations within and near

the study area............................................................................................................................................... 31

8. Graphs showing variations in annual, monthly, and daily mean flow for station 5051650,

LaBelle Creek near Veblen, S. Dak., water years 1988-99 .................................................................................... 34

9. Graphs showing variations in annual, monthly, and daily mean flow for station 05289985,

Big Coulee Creek near Peever, S. Dak., water years 1988-99 ............................................................................... 35

10. Map showing location of lakes with recorded water-level elevations.................................................................... 36

11 -20. Hydrographs for lakes:

11. Bitter Lake in Day County........................................................................................................................... 37

12. Blue Dog Lake in Day County .................................................................................................................... 37

13. Buffalo Lakes in Marshall County............................................................................................................... 38

14. Clear Lake in Marshall County.................................................................................................................... 38

15. Cottonwood Lake in Roberts County .......................................................................................................... 39

16. Cottonwood Lake in Marshall County......................................................................................................... 39

17. North and South Drywood Lakes in Roberts County.................................................................................. 40

18. Enemy Swim Lake in Day County.............................................................................................................. 40

19. Hillebrands Lake in Day County................................................................................................................. 41

20. Hurricane Lake in Roberts County.............................................................................................................. 41

Contents III
FIGURES Continued

21-25. Hydrographs for lakes:

21. Pickerel Lake in Day County....................................................................................................................... 42

22. Piyas Lake in Marshall County.................................................................................................................... 42

23. North and South Red Iron Lakes in Marshall County.................................................................................. 43

24. Spring Lake in Day County.......................................................................................................................... 43

25. North and South Whitestone Lakes in Roberts County............................................................................... 44

26. Map showing location of miscellaneous streamflow measurements at lake inlets or outlets................................ 46

TABLES

1-8. Precipitation, in inches, for the:

1. Big Stone City, S. Dak., National Weather Service station, 1997-99............................................................... 6

2. Sisseton, S. Dak., National Weather Service station, 1997-99......................................................................... 6

3. Summit, S. Dak., National Weather Service station, 1997-99 ......................................................................... 6

4. Victor, S. Dak., National Weather Service station, 1997-99 ............................................................................ 6

5. Watertown, S. Dak., National Weather Service station, 1997-99..................................................................... 6

6. Waubay National Wildlife Refuge, S. Dak., National Weather Service station, 1997-99................................ 7

7. Wilmot, S. Dak., National Weather Service station, 1997-99.......................................................................... 7

8. Forman, N. Dak., National Weather Service station, 1997-99......................................................................... 7

9. Selected site information for observation wells and test holes completed from 1997 through 1999..................... 10

10. Selected site information for observation wells in water-level network................................................................ 15

11. Water-quality data from observation wells sampled by the U.S. Geological Survey from 1997-99...................... 24

12. Constituent concentrations for quality-assurance laboratory and field blanks....................................................... 29

13. Peak-flow estimates for selected recurrence intervals for active gaging stations within and

near the study area.................................................................................................................................................. 32

14. Miscellaneous streamflow measurements at lake inlets or outlets......................................................................... 45

CONTENTS OF SUPPLEMENTAL INFORMATION SECTIONS

A. Geologic logs for:

Test Holes Drilled and Observation Wells Installed, 1997-99..................................................................................... 53

Selected Existing Test Holes and Observation Wells in Which the Bedrock was Reached........................................ 119

B. Hydrographs for South Dakota Department of Environment and Natural Resources 

North Dakota State Water Commission observation wells:

Bl. 118N52W18BBBB2 (site number 1)............................................................................................................ 199

B2. 118N52W30CDCD (site number 2).............................................................................................................. 199

B3. 119N52W4ADDDR (site number 3)............................................................................................................ 200

B4. 119N52W10DDDDR (site number 4).......................................................................................................... 200

B5. 119N52W33DCDCR (site number 5).......................................................................................................... 201

B6. 119N53W6BBBB (site number 6)................................................................................................................ 201

B7. 120N51W19BBCCR (site number 7).......................................................................................................... 202

B8. 120N52W9BBBB R (site number 8)............................................................................................................ 202

B9. 120N52W12AAAB R (site number 9).......................................................................................................... 203

BIO. 120N52W23BBBB R (site number 10)........................................................................................................ 203

Bll. 120N52W27CDDD R (site number 11)........................................................................................................ 204

B12. 120N52W28DDDD R (site number 12)....................................................................................................... 204

B13. 120N54W23DDDC (site number 13)........................................................................................................... 205

B14. 121N47W1AAAA (site number 14)............................................................................................................. 205

B15. 121N47W2DDDD (site number 15)............................................................................................................. 206

B16. 121N47W6CCCC (site number 16).............................................................................................................. 206

B17. 121N51W29BBBB R (site number 17)........................................................................................................ 207

B18. 121N52W1CBBB R (site number 18).......................................................................................................... 207

B19. 121N52W2ADDD R (site number 19)......................................................................................................... 208

B20. 121N52W2BAAA R (site number 20).......................................................................................................... 208

IV Contents
CONTENTS OF SUPPLEMENTAL INFORMATION SECTIONS Continued

B. Hydrographs for South Dakota Department of Environment and Natural Resources 

North Dakota State Water Commission observation wells Continued:

B21. 121N52W2BBBA R (site number 21).......................................................................................................... 209

B22. 121N52W2CCCC R (site number 22).......................................................................................................... 209

B23. 121N52W3CCBB R (site number 23).......................................................................................................... 210

B24. 121N52W4BBAB R (site number 24).......................................................................................................... 210

B25. 121N52W8DCCC R (site number 25).......................................................................................................... 211

B26. 121N52W8DDDD R (site number 26)......................................................................................................... 211

B27. 121N52W13BBBA R (site number 27)........................................................................................................ 212

B28. 121N52W22CCCC R (site number 28)........................................................................................................ 212

B29. 121N52W25CCCC R (site number 29)........................................................................................................ 213

B30. 121N52W29CCBB R (site number 30)........................................................................................................ 213

B31. 121N54W34AADA (sitenumber 31)........................................................................................................... 214

B32. 122N47W35DDCD (site number 32)........................................................................................................... 214

B33. 122N48W13DDDD2 R (site number 33)..................................................................................................... 215

B34. 122N49W7BBBB (site number 34).............................................................................................................. 215

B35. 122N49W17AAAD (site number 35)........................................................................................................... 216

B36. 122N49W18AAAA (site number 36)........................................................................................................... 216

B37. 122N49W30BBBB (site number 37)............................................................................................................ 217

B38. 122N50W13DDDC (site number 38)........................................................................................................... 217

B39. 122N51W4DDDD2 R (site number 39)....................................................................................................... 218

B40. 122N51W27BBBB2 R (site number 40)...................................................................................................... 218

B41. 122N52W1DDCC R (site number 41).......................................................................................................... 219

B42. 122N52W2ABBBR (site number 42).......................................................................................................... 219

B43. 122N52W2BBBB R (site number 43).......................................................................................................... 220

B44. 122N52W3ABBB R (site number 44).......................................................................................................... 220

B45. 122N52W3CCDD R (site number 45).......................................................................................................... 221

B46. 122N52W3DAAA R (site number 46)......................................................................................................... 221

B47. 122N52W5CCCC R (site number 47).......................................................................................................... 222

B48. 122N52W9AAAA2 R (site number 48)....................................................................................................... 222

B49. 122N52W11BBBB R (site number 49)........................................................................................................ 223

B50. 122N52W12CCCC R (site number 50)........................................................................................................ 223

B51. 122N52W14BBBB R (site number 51)........................................................................................................ 224

B52. 122N52W16BBBC R (site number 52)........................................................................................................ 224

B53. 122N52W27BBBB2 R (site number 53)...................................................................................................... 225

B54. 122N52W32AAAA R (site number 54)....................................................................................................... 225

B55. 122N52W36BCCB2 R (site number 55)...................................................................................................... 226

B56. 122N53W11DDDD R (site number 56)........................................................................................................ 226

B57. 123N49W24CCCC (site number 57)............................................................................................................ 227

B58. 123N50W22BBBB (site number 58)............................................................................................................ 227

B59. 123N50W23AAAA (site number 59)........................................................................................................... 228

B60. 123N50W35AAAA (site number 60)........................................................................................................... 228

B61. 123N51W21DDDD2 R (site number 61)..................................................................................................... 229

B62. 123N52W6DDDA R (site number 62)......................................................................................................... 229

B63. 123N52W8BAAA R (site number 63).......................................................................................................... 230

B64. 123N52W19BABAR (site number 64)........................................................................................................ 230

B65. 123N52W25CCCC R (site number 65)........................................................................................................ 231

B66. 123N52W35CBBB R (site number 66)........................................................................................................ 231

B67. 123N52W35CBBB2 R (site number 67)...................................................................................................... 232

B68. 123N53W13CCCC2 R (site number 68)...................................................................................................... 232

B69. 124N50W27BBBB R (site number 69)........................................................................................................ 233

B70. 124N51W25AAAB R (site number 70)........................................................................................................ 233

B71. 124N51W30BBBB2R (site number 71)...................................................................................................... 234

	Contents V
CONTENTS OF SUPPLEMENTAL INFORMATION SECTIONS Continued

B. Hydrographs for South Dakota Department of Environment and Natural Resources 

North Dakota State Water Commission observation wells Continued:

B72. 124N51W4DDDD R (site number 72)......................................................................................................... 234

B73. 124N52W9AAAC2 R (site number 73)........................................................................................................ 235

B74. 125N50W6CBBB R (site number 74).......................................................................................................... 235

B75. 125N50W6CCCC R (site number 75).......................................................................................................... 236

B76. 125N50W6DCCC R (site number 76).......................................................................................................... 236

B77. 125N50W6DCCC2 R (site number 77)........................................................................................................ 237

B78. 125N50W7ADDD R (site number 78)......................................................................................................... 237

B79. 125N50W8BBBA R (site number 79).......................................................................................................... 238

B80. 125N50W8CCCC2 R (site number 80)........................................................................................................ 238

B81. 125N50W8CCCC3 R (site number 81)........................................................................................................ 239

B82. 125N50W12ABCC2 R (site number 82)...................................................................................................... 239

B83. 125N50W20DDDD2 R (site number 83)..................................................................................................... 240

B84. 125N51W1DCCCR (site number 84)......................................................................................................... 240

B85. 125N51W1DCCC2 R (site number 85)........................................................................................................ 241

B86. 125N51W13ABBB2 R (site number 86)...................................................................................................... 241

B87. 125N51W32CCCC R (site number 87)........................................................................................................ 242

B88. 125N51W7BBBB2 R (site number 88)........................................................................................................ 242

B89. 125N52W16BABB2 R (site number 89)...................................................................................................... 243

B90. 125N52W23CCCC R (site number 90)........................................................................................................ 243

B91. 125N53W12CCCC R (site number 91)........................................................................................................ 244

B92. 126N49W7BBBB2 R (site number 92)........................................................................................................ 244

B93. 126N49W11AABA R (site number 93)........................................................................................................ 245

B94. 126N50W21DDDD R (site number 94)....................................................................................................... 245

B95. 126N50W32CCCB R (site number 95)........................................................................................................ 246

B96. 126N51W35AADA R (site number 96)....................................................................................................... 246

B97. 126N51W36DCCC R (site number 97)........................................................................................................ 247

B98. 127N48W2BBBB R (site number 98).......................................................................................................... 247

B99. 127N48W7BBBB R (site number 99).......................................................................................................... 248

B100. 127N48W7BBBB2 R (site number 100)...................................................................................................... 248

B101. 127N48W7DDBB R (site number 101)........................................................................................................ 249

B102. 127N48W18DDDD R (site number 102)..................................................................................................... 249

B103. 127N48W28AAAA R (site number 103)..................................................................................................... 250

B104. 127N49W10BBBB2R (site number 104)..................................................................................................... 250

BIOS. 127N49W14DAAA R (site number 105)..................................................................................................... 251

B106. 127N49W14DAAA2 R (site number 106)................................................................................................... 251

B107. 127N49W26DDDD R (site number 107)..................................................................................................... 252

BIOS. 127N49W29DCDC2 R (site number 108).................................................................................................... 252

B109. 127N49W36BBBB R (site number 109)...................................................................................................... 253

B110. 127N50W9BBBB2 R (site number 110)...................................................................................................... 253

Bill. 127N50W19CCCB R (site number 111)....................................................................................................... 254

B112. 127N50W21DDDD R (site number 112)...................................................................................................... 254

B113. 127N50W25ADAD2 R (site number 113).................................................................................................... 255

B114. 127N51W3AAAA R (site number 114)........................................................................................................ 255

B115. 127N51W9AAAA2 R (site number 115)...................................................................................................... 256

B116. 127N52W25AAAA2 R (site number 116).................................................................................................... 256

B117. 127N52W7CCCD R (site number 117) ........................................................................................................ 257

B118. 128N48W1CCDC2 R (site number 118)...................................................................................................... 257

B119. 128N48W4DDDD R (site number 119)........................................................................................................ 258

B120. 128N48W6BBBB R (site number 120)........................................................................................................ 258

B121. 128N48W19BCCC R (site number 121)...................................................................................................... 259

B122. 128N48W20BBBB R (site number 122)...................................................................................................... 259

VI Contents
CONTENTS OF SUPPLEMENTAL INFORMATION SECTIONS Continued

B. Hydrographs for South Dakota Department of Environment and Natural Resources 

North Dakota State Water Commission observation wells Continued:

B123. 128N48W29DDDD R (site number 123) ..................................................................................................... 260

B124. 128N49W1DDAD2 R (site number 124) ..................................................................................................... 260

B125. 128N49W20BBBB R (site number 125) ...................................................................................................... 261

B126. 128N49W36AAAA R (site number 126) ..................................................................................................... 261

B127. 128N50W10BBBB2 R (site number 127) .................................................................................................... 262

B128. 128N50W21AAAA R (site number 128) ..................................................................................................... 262

B129. 128N50W21AABA R (site number 129)...................................................................................................... 263

B130. 128N50W21CCCC R (site number 130) ...................................................................................................... 263

B131. 128N50W25AAAB2 R (site number 131).................................................................................................... 264

B132. 128N50W25AAAB3 R (site number 132).................................................................................................... 264

B133. 128N51W23AABA R (site number 133)...................................................................................................... 265

B134. 128N51W26BBBB2 R (site number 134) .................................................................................................... 265

B135. 128N52W1DDDD2 R (site number 135) ..................................................................................................... 266

B136. 128N52W3CCCB2 R (site number 136)...................................................................................................... 266

B137. 128N52W25AAAB2 R (site number 137).................................................................................................... 267

B138. 128N52W25AAAB R (site number 138)...................................................................................................... 267

B139. 128N52W27BBBC R (site number 139)...................................................................................................... 268

B140. 128N53W10BBBB R (site number 140) ...................................................................................................... 268

B141. 128N56W3BBBB (site number 141)............................................................................................................ 269

B142. 129N48W33ADDA R (site number 142) ..................................................................................................... 269

B143. 129N50W24CCD1 R (site number 143)....................................................................................................... 270

B144. 129N50W24CCD2 R (site number 144)....................................................................................................... 270

B145. 129N50W24CCD3 R (site number 145)....................................................................................................... 271

B146. 129N50W27BBBB2 R (site number 146).................................................................................................... 271

B147. 129N51W8CCC R (site number 147)........................................................................................................... 272

B148. 129N51W19ABA R (site number 148)......................................................................................................... 272

B149. 129N52W14AAA (site number 149)............................................................................................................ 273

B150. 129N52W21CCC R (site number 150)......................................................................................................... 273

B151. 129N52W25AAAB2 R (site number 151).................................................................................................... 274

B152. 129N53W7BBA R (site number 152)........................................................................................................... 274

B153. 129N53W9AAA R (site number 153) .......................................................................................................... 275

B154. 129N53W27BBBB R (site number 154) ...................................................................................................... 275

B155. 129N54W1AAA (site number 155).............................................................................................................. 276

B156. 129N54W1AAA2 (site number 156)............................................................................................................ 276

B157. 129N54W3ADD R (site number 157).......................................................................................................... 277

B158. 129N54W25AAAA R (site number 158) ..................................................................................................... 277

B159. 130N53W4BAA (site number 159).............................................................................................................. 278

B160. 130N53W4BAA2 (site number 160)............................................................................................................ 278

B161. 130N54W27CCC R (site number 161)......................................................................................................... 279

B162. 130N54W33DDD R (site number 162) ........................................................................................................ 279

B163. 130N54W35CCC R (site number 163)......................................................................................................... 280

C. Annual peak-flow information:

Cl. Station 05050000, Bois de Sioux River near White Rock, S. Dak............................................................... 283

C2. Station 05051650, La Belle Creek near Veblen, S. Dak............................................................................... 283

C3. Station 05289985, Big Coulee Creek near Peever, S. Dak........................................................................... 283

C4. Station 05290000, Little Minnesota River near Peever, S. Dak.................................................................... 284

C5. Station 05291000, Whetstone River near Big Stone City, S. Dak................................................................ 284

C6. Station 05292000, Minnesota River at Ortonville, Minn.............................................................................. 284

C7. Station 06479215, Big Sioux River near Florence, S. Dak........................................................................... 285

C8. Station 06479438, Big Sioux River near Watertown, S. Dak....................................................................... 285

Contents VII
CONTENTS OF SUPPLEMENTAL INFORMATION SECTIONS Continued

D. Mean flow and summary statistics

Dl. Station 05051650, LaBelle Creek near Veblen, S. Dak.

1. Mean flow, in cubic feet per second.............................................................................................................. 289

2. Statistics on mean flow, in cubic feet per second (October 1998 through September 1999)....................... 289

3. Serial correlation for 1-year lag for monthly and annual mean flows (October 1998

through September 1999)....................................................................................-........................................ 290

4. Correlation matrix for monthly mean flow (October 1998 through September 1999)................................. 290

5. Lowest mean flow, in cubic feet per second, and ranking for the following number of

consecutive days............................................................................................................................................ 291

6. Highest mean flow, in cubic feet per second, and ranking for the following number

of consecutive days....................................................................................................................................... 291

D2. Station 05289985, Big Coulee Creek near Peever, S. Dak.

1. Mean flow, in cubic feet per second.............................................................................................................. 292

2. Statistics on mean flow, in cubic feet per second (October 1988 through September 1999)....................... 292

3. Serial correlation for 1-year lag for monthly and annual mean flows (October 1988

through September 1999).............................................................................................................................. 293

4. Correlation matrix for monthly mean flow (October 1988 through September 1999)................................. 293

5. Lowest mean flow, in cubic feet per second, and ranking for the following number of

consecutive days............................................................................................................................................ 294

6. Highest mean flow, in cubic feet per second, and ranking for the following number of

consecutive days............................................................................................................................................ 294

E. Water-level measurements for:

El. Bitter Lake in Day County............................................................................................................................ 297

E2. Blue Dog Lake in Day County...................................................................................................................... 298

E3. Buffalo Lake North in Marshall County....................................................................................................... 299

E4. Buffalo Lake South in Marshall County....................................................................................................... 299

E5. Clear Lake in Marshall County..................................................................................................................... 299

E6. Clubhouse Lake in Roberts County .............................................................................................................. 299

E7. Cottonwood Lake (North) in Roberts County............................................................................................... 299

E8. Cottonwood Lake in Marshall County.......................................................................................................... 300

E9. Drywood Lakes in Roberts County............................................................................................................... 300

E10. Enemy Swim Lake in Day County................................................................................................................ 301

Ell. Hillebrands Lake in Day County................................................................................................................... 302

E12. Hurricane Lake in Roberts County ............................................................................................................... 302

E13. Pickerel Lake in Day County........................................................................................................................ 303

E14. Piyas Lake in Marshall County..................................................................................................................... 303

E15. Red Iron Lake North in Marshall County..................................................................................................... 303

E16. Spring Lake in Day County...................... .................................................................................................... 304

E17. Whitestone Lake North in Roberts County................................................................................................... 304

E18. Whitestone Lake South in Roberts County................................................................................................... 304

VIII Contents
WELL-NUMBERING SYSTEM

The Federal land-survey system is one method used to number observation wells and test holes. This system 

uses township, range, and section number. Number 126N52W20CCCB indicates a well in Township 126 North, 

Range 52 West, section 20. The last four letters show location within the section as shown below. When a nest of 

wells is drilled, sequential numbers identify each well in the nest and appear after the four-letter code. Wells 

located within the former boundary of the Lake Traverse Indian Reservation are given a suffix of "R."

Well 

126N52W20CCCB R

Contents IX
Selected Hydrologic and Water-Quality Data, 

1997 through 1999, for the Lake Traverse 

Reservation/Roberts County Water-Resources 

Investigation in South Dakota

By Ryan F. Thompson

ABSTRACT

This report presents data on precipitation, 

geologic logs, water levels for ground water and 

lakes, stream discharge, and water quality for 

ground water that have been collected or compiled 

beginning in 1997 for the Lake Traverse 

Reservation/Roberts County Water Resources 

Investigation. The investigation was initiated in 

1994 as a cooperative effort between the U.S. 

Geological Survey, the South Dakota Geological 

Survey, the Sisseton-Wahpeton Sioux Tribe, and 

Roberts County.

Prior to the water-resources investigation, a 

reconnaissance drilling program was accomplished from 1988 through 1990 by the U.S. 

Geological Survey and the Sisseton-Wahpeton 

Sioux Tribe. During the reconnaissance drilling, 

19 test holes were drilled, and 9 observation wells 

were installed. After the water-resources investigation started in 1994, a comprehensive drilling 

program was initiated in cooperation with the 

South Dakota Geological Survey. This is the 

second of two data reports compiling data 

collected for the study. The first data report presented existing data within the study area, and data 

collected through 1996 specifically for the study. 

Since 1997, 59 additional test holes have been 

drilled and 23 observation wells have been 

installed. Geologic logs are presented for the test 

holes and wells completed during the 1997 and 

subsequent drilling seasons, as well as for selected

existing test holes and wells in which the bedrock 

was reached.

Precipitation data are presented for the eight 

National Weather Service stations within and near 

the study area. Water-level data for the new observation wells are presented, as well as water-level 

data collected since 1996 for observation wells 

included in the first data report. Water-quality data 

are presented for the samples collected from 

observation wells installed between 1997 and 

1999. Updated peak-flow information is provided 

for all gaging stations included in the first data 

report that are still active. Summary statistics are 

presented for the two active streamflow-gaging 

stations that had less than a 10-year period of 

record when the first data report was prepared. 

Additional lake-level data compiled by the South 

Dakota Department of Environment and Natural 

Resources are presented to supplement the lakelevel data included in the first data report. Miscellaneous streamflow measurements taken at the 

outlets of two lakes in the study area also are 

presented.

INTRODUCTION

The Lake Traverse Reservation/Roberts County 

Water Resources Investigation was initiated in 1994 as 

a cooperative effort between the U.S. Geological 

Survey (USGS), the South Dakota Geological Survey 

(SDGS), the Sisseton-Wahpeton Sioux Tribe, and 

Roberts County.

Introduction
Prior to the water-resources investigation, a 

reconnaissance drilling program was accomplished 

from 1988 through 1990 by the USGS and the 

Sisseton-Wahpeton Sioux Tribe. During the reconnaissance drilling, 19 test holes were drilled, and 9 observation wells were installed. The reconnaissance 

drilling program identified the need for a more 

thorough knowledge of the area in order to map the 

thickness and extent of sand and gravel deposits and 

delineate aquifers. The present investigation was 

initiated to improve the knowledge of the area.

After the water-resources investigation was 

started in 1994, a comprehensive drilling program was 

initiated in cooperation with SDGS. Between 1994 and 

1996,41 test holes were drilled, and 19 observation 

wells were installed. Between 1997 and 1999,59 additional test holes were drilled and 23 more observation 

wells were installed. Geologic logs for the test holes 

and wells completed during the reconnaissance and 

comprehensive drilling programs prior to 1997 are presented in Carter and Thompson (1999). Geologic logs 

for the test holes and wells completed during 1997-99 

are presented in this report.

In addition to the observation wells installed 

during the reconnaissance and comprehensive drilling 

programs, 57 observation wells owned by the South 

Dakota Department of Environment and Natural 

Resources (SDDENR) and 18 observation wells owned 

by the North Dakota State Water Commission 

(NDSWC) were incorporated into the study for the 

purpose of water-level monitoring. The USGS began a 

water-level monitoring program in December 1996, 

and data collected from this effort are included in this 

data report.

Precipitation records from 1997 through 1999 at 

eight sites are compiled, as well as lake levels collected 

by SDDENR from 1997 through 1999 at 20 sites. In 

the previous data report (Carter and Thompson, 1999), 

two streamflow-gaging stations had only nine years of 

record. Both of these stations now have 12 years of 

record, and updated summary statistics are presented in 

this report for these two stations. Water-quality samples from 19 observation wells have been collected 

from 1997 through 1999. These samples were analyzed for field measurements, common and trace 

elements, nutrients, and radiometrics. The shallow 

wells also were tested for common pesticides and total 

coliform bacteria.

Specifically, this report contains (1) precipitation 

records for 1997-99 for eight sites; (2) geologic logs 

for 59 test holes and 23 observation wells completed 

for this study and selected other test holes and observation wells within the former boundary of the Lake 

Traverse Reservation that reached bedrock; (3) hydrographs for 163 wells; (4) water-quality data for 19 

observation wells; (5) updated peak-flow frequency 

estimates for all active stations and updated summary 

statistics for the two active streamflow-gaging stations 

that had less than a 10-year period of record in Carter 

and Thompson (1999); (6) water-level elevation data 

for 1997-99 for 20 lakes; and (7) miscellaneous 

streamflow measurements at lake inlets or outlets.

Description of Study Area

Most of the Lake Traverse Reservation/Roberts 

County study area is located in northeastern South 

Dakota; a small part of the former boundary of the Lake 

Traverse Reservation extends into southeast North 

Dakota (fig. 1). Roberts County has an area of 

1,135 square miles. The former boundary of the Lake 

Traverse Reservation included 1,595 square miles in 

South Dakota and North Dakota.

The study area, which is included in the Central 

Lowlands physiographic province, occupies the 

Coteau des Prairies and the Minnesota River-Red River 

lowland physiographic divisions (Flint, 1955). 

Present-day topography was formed by the advancement and recession of glaciers during the Wisconsin 

age of the Pleistocene epic (Koch, 1975). The Coteau 

des Prairies, which is drained by the Big Sioux River, 

the James River, and the Minnesota River, is a massive 

plateau with rugged morainal topography (Koch, 

1975). Much of the upper coteau consists of noncontributing, internal drainage except in times of high precipitation and low evaporation. The Minnesota RiverRed River lowland is a broad depression that consists 

primarily of ground moraine (till) and isolated outwash 

and lake deposits formed by glacial meltwaters (Koch, 

1975). This southern area of the lowland is drained by 

the Minnesota River and subsequently to the Mississippi River (Gulf of Mexico), and the northern area is 

drained by the Bois de Sioux River and subsequently to 

the Red River (Hudson Bay).

Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Clear... norm KM ~ 

'late/ \lrtmLala! q | 

' t±J & ^Sarah a

V SrfS /nkf

i n i 11 i'i I l'l ' ' ' '

0 2 4 6 8 10 KILOMETERS

Gran Co/ T 120 N. Pt Lake Dakota plain

5n^ndo Coteau du Missouri ^ Study

/Area

Base from U.S. Geological Survey

digital line graph 1:24,000 R 52 w

V

James River highlands'

Minnesota RiverRed River lowlands

Coteau des Prairies

r^t

/^i^ James River lowlands

Figure 1 . Location of study area.

Introduction 3
Glacial deposits (till and outwash) cover the 

majority of land surface. The drift is underlain by the 

Cretaceous-age Pierre Shale, Niobrara Formation, and 

Carlile Shale and by Precambrian-age granite (Flint, 

1955). Isolated surface exposures of the Cretaceousage formations are present in the study area, although 

they are relatively uncommon. Quaternary-age alluvial 

deposits also are present in the study area.

Acknowledgments

Many people have assisted with the development 

and implementation of the water-resources investigation. The SDGS drilled the test holes and installed the 

observation wells for the project. Dennis Tomhave 

(SDGS) provided insight and technical guidance 

throughout the study and assisted extensively during 

the interpretation of the geologic logs. The water-level 

measurements for 20 lakes and many observation wells 

were provided by SDDENR, Water Rights Program.

PRECIPITATION DATA

Precipitation data are collected by the National 

Weather Service at eight sites in and near the study area 

(fig. 2). Monthly precipitation data were compiled 

from annual summaries accessed on the internet, 

January 22, 2000, at http://www.ncdc.noaa.gov/pub/ 

data/coop-precip/south-dakota.txt. Precipitation data 

for 1997-99 are presented for Big Stone City, S. Dak. 

(table 1), Sisseton, S. Dak. (table 2), Summit, S. Dak. 

(table 3), Victor, S. Dak. (table 4), Watertown, S. Dak. 

(table 5), Waubay National Wildlife Refuge, S. Dak. 

(table 6), Wilmot, S. Dak. (table 7), and Forman, 

N. Dak. (table 8).

WELL AND TEST-HOLE DATA

The Lake Traverse Reservation/Roberts County 

Water Resources Investigation included two drilling 

programs: a reconnaissance program from 1988 

through 1990 and an ongoing comprehensive program 

that began in 1994. During the reconnaissance drilling 

program, 19 test holes were drilled, and 9 observation 

wells were installed. During the comprehensive 

drilling program, 41 test holes were drilled, and 19 

observation wells were installed between 1994 and 

1996. Another 59 test holes and 23 observation wells 

were installed between 1997 and 1999, and these 

geologic logs are presented in Section A of the

Supplemental Information section at the end of this 

report. All wells and test holes were drilled in Roberts 

County during both the reconnaissance and comprehensive drilling programs.

Three methods of station identification for the 

wells and test holes are used in this report. The first 

method is the station identification number, which is 

based on the international system of latitude and longitude. The number contains 15 digits. The first six 

digits denote the degrees, minutes, and seconds of 

latitude north of the equator. The next seven digits 

denote the degrees, minutes, and second of longitude 

west of the prime (Greenwich) meridian. The last two 

digits are sequential numbers for sites within the same 

latitude and longitude. The latitude and longitude were 

determined using Global Positioning Satellite (GPS) 

equipment at the time of drilling and rounded to the 

nearest second.

The second identification method used is the 

local number, which is based on the Federal landsurvey system of eastern South Dakota. The local 

number consists of the township number followed by 

"N," for north, the range number followed by "W," for 

west, and the section number, followed by a maximum 

of four uppercase letters that indicate, respectively, the 

160-, 40-, 10-, and 2.5-acre tract in which the well or 

test hole is located. These letters are assigned in a 

counterclockwise direction beginning with "A" in the 

northeast quarter. A sequential number following the 

last letter is used to distinguish between wells in the 

same 2.5-acre tract. An "R" at the end of the local 

number distinguishes sites that are located within the 

former boundary of the Lake Traverse Reservation. 

Thus, well 125N50W12ABCC R is located within the 

former boundary of the Lake Traverse Reservation in 

the S W14 of the S WA of the NWV4 of the NEV4 of 

section 12 in township 125 north and range 50 west.

The third identification method is the "other 

identifier," which was assigned by the SDGS. This 

name denotes the drilling rig number, the year, and 

sequence in which the well or test hole was drilled.

All observation wells have 2-inch diameter, 

flush-threaded PVC casing and screen. The wells were 

gravel packed with washed sand (0.65- to 0.75-millimeter diameter), and were sealed with bentonite to 

approximately 20 feet below land surface and with neat 

cement from the top of the bentonite to the land surface. 

Well development was accomplished using compressed air. and locking metal protectors were installed 

over the top of each well.

Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
97°30'

V-r- ,, T. 130N. 

K-L «*«:=# « , _Jf' , -,

96°45'

^__

Victor 4 NNE

nchtand co ___ _North Dakota

Marshall Co '^f C(^ ~ ~\ FWwrtTco

Waubay National 

s/Wildlife Refuge

^ ____ '"«" i ^:

- 5

i ''" / R.50W. R.49W. R.48W. R-47V. 

Summit 1 W

0 2 4 6 8 10 MILES

0 2 4 6 8 10 KILOMETERS

GranlCo T. 120 N. 

CodingtonCo

EXPLANATION

NATIONAL WEATHER SERVICE 

PRECIPITATION STATION

Base from U.S. Geological Survey 

digital line graph 1:24,000 R. 52 W. Watertown FAA Ap

Figure 2. Location of precipitation stations within and near study area.

Well and Test-Hole Data 5
Table 1 . Precipitation, in inches, for the Big Stone City, S. Dak., National Weather Service station, 1997-99

Year Jan Feb

1997 1.71 0.43

1998 .96 1.91

1999 .94 .12

Table 2. Precipitation, in

Year Jan Feb

1997 3.13 0.52

1998 1.30 2.03

1999 1.20 .12

Table 3. Precipitation, in

[ , no data; , not computed]

Year Jan Feb

1997 0.61

1998 0.79 1.64

1999 1.41 .29

Table 4. Precipitation, in

Year Jan Fab

1997 3.18 0.52

1998 .80 1.58

1999 1.13 .17

Table 5. Precipitation, in

[ , no data; , not computed]

Year Jan Feb

1997 0.87

1998 .71 0.76

1999 .23

Mar

1.55

1.14

.77

inches,

Mar

0.91

2.06

1.28

inches,

Mar

1.31

1.9

L.19

inches,

Mar

L.25

1.22

1.27

inches,

Mar

1.02

.40

.57

Apr

3.07

2.87

L.45

May

1.73

1.99

3.06

for the Sisseton, S

Apr

2.60

2.91

1.45

May

1.55

5.51

2.41

for the Summit, S.

Apr

2.23

1.4

2.05

May

1.22

4.31

3.46

Jun

1.16

4.02

3.63

Jul

3.84

2.40

5.52

Aug

4.89

3.69

1.92

Sep

1.20

.15

3.66

Oct

2.13

5.59

.25

Nov

0.4

1.64

.08

Dec Annual

0.21 22.32

.12 26.48

.15 21.55

. Dak., National Weather Service station, 1997-99

Jun

0.91

3.59

4.54

Jul

4.41

1.88

2.20

Aug

2.08

2.77

4.07

Sep

0.41

0.00

3.65

Dak., National Weather Service station

Jun

0.59

2.66

4.69

Jul

5.22

1.35

3.05

Aug

3.99

4.76

3.77

Sep

1.64

.05

2.75

Oct

2.01

7.95

.57

Nov

0.75

1.81

.00

Dec Annual

0.42 19.70

.07 31.88

.20 21.69

, 1997-99

Oct

2.88

6.8

.43

Nov

0.46

1.21

.06

Dec Annual

0.51

.17 27.04

.16 23.31

for the Victor, S. Dak., National Weather Service station, 1997-99

Apr

2.86

2.71

1.88

May

1.87

5.15

3.08

for the Watertown,

Apr

2.17

1.55

May

2.11

2.91

2.41

Jun

1.83

5.88

5.32

S. Dak.,

Jun

1.30

1.62

5.44

Jul

2.49

1.98

3.29

National

Jul

3.56

2.69

1.65

Aug

3.43

1.32

3.42

Sep

1.75

.33

2.78

Oct

2.98

5.74

.81

Weather Service station,

Aug

2.02

4.06

1.39

Sep

0.99

.13

2.21

Oct

2.53

7.06

.27

Nov

0.84

1.54

.00

1997-99

Nov

0.25

.51

.08

Dec Annual

0.32 23.32

.27 28.52

.43 23.58

Dec Annual

0.15

.30 23.32

.05

6 Hydrologic and Water-Quality Data, 1997 through 1999, Laka Traverse Reservation/Roberts County Investigation
Table 6. Precipitation, in inches, for the Waubay National Wildlife Refuge, S. Dak., National Weather Service station, 

1997-99

Year

1997

1998

1999

Jan

1.60

1.24

.69

Feb

0.31

1.10

.07

Mar

0.65

1.10

.74

Apr

1.81

4.16

1.35

May

1.49

5.42

2.98

Jun

1.68

3.00

7.75

Jul

5.71

1.97

2.37

Aug

2.89

2.66

3.19

Sep

0.84

.22

3.64

Oct

2.35

7.78

.54

Nov

0.59

.80

.00

Dec

0.49

.14

.17

Annual

20.41

29.59

23.49

Table 7. Precipitation, in inches, for the Wilmot, S. Dak., National Weather Service station, 1997-99

Year

1997

1998

1999

Jan

3.15

1.03

1.25

Feb

0.34

1.54

.10

Mar

1.38

1.18

1.01

Apr

2.61

3.34

1.39

May

1.43

3.54

1.82

Jun

0.89

3.28

3.40

Jul

3.69

2.50

2.90

Aug

3.63

3.14

3.22

Sep

0.94

.03

2.01

Oct

1.98

5.65

.35

Nov

0.49

1.31

.02

Dec

0.19

.08

.12

Annual

20.72

26.62

17.59

Table 8. Precipitation, in inches, for the Forman, N. Dak., National Weather Service station, 1997-99 

[ , no data; , not computed]

Year

1997

1998

1999

Jan

1.84

.54

1.54

Feb

1.37

.06

Mar

1.46

1.20

Apr

1.99

2.72

.78

May

1.23

5.87

2.61

Jun

1.26

8.42

4.64

Jul

4.55

2.15

3.70

Aug

2.66

1.93

3.98

Sep

2.54

.69

5.34

Oct

2.48

.79

Nov

1.03

2.03

Dec

0.18

.10

Annual

--

--

-

Selected information is presented in table 9 for 

the 59 test holes and 23 observation wells installed 

between 1997 and 1999 for the study. The last water 

level measured in the observation wells in calendar 

year 1999 is included in the table. The altitudes of all 

the wells installed for this study were determined using 

GPS software, and have vertical accuracies of approximately 0.10 foot. The location of the observation 

wells installed for the study are shown in figure 3, and 

the test holes are shown in figure 4.

The geologic logs in the first part of Supplemental Information Section A are presented in the 

order listed in table 9. Information regarding special 

construction details, site characteristics, and electric 

geophysical log (electric log) availability are indicated 

in the notes following the geologic logs. The electric 

logs may be obtained from the USGS office in Huron, 

South Dakota.

In addition to the wells specifically installed for 

this investigation, other observation wells have been 

incorporated into the study. Studies similar to the Lake 

Traverse Reservation/Roberts County Water Resources 

Investigation have been completed for Codington and 

Grant Counties (Hansen, 1990), Marshall County 

(Koch, 1975), and Day County (Leap, 1988) in South 

Dakota by the USGS and SDGS, and for Sargent 

County (Armstrong, 1979, 1982) and Richland County 

(Baker, 1966; Baker and Paulson, 1967) in North 

Dakota by the USGS and North Dakota Geological 

Survey. Comprehensive drilling programs were conducted as part of all of these investigations. The observation wells that were installed during these other 

county studies that are within or near the boundary of 

the former Lake Traverse Reservation are included in 

the second part of Supplemental Section A entitled 

"Selected Existing Test Holes and Observation Wells in 

Which the Bedrock was Reached."

Well and Test-Hole Data
T. 130 N.

46°00

« {

R. 55 W. ,i i ii */-' 

' Sargent Co__^^ j__*j_ -.- 1 on M T. 129N.

T. 128N.

 "victor 

^R2-97-26. Jf R2-97-30 % ,

 *R2-97-27 ! k,

lh»R2-97-43

T. 125 N.

,f GrantCoy T. 120N.

'% CorJingion Co

122 N.

0 2 4 6 8 10 MILES

ll'lhh'lh'l ' ' '

0 2 4 6 8 10 KILOMETERS

EXPLANATION

* OBSERVATION WELL-Number is 

other identifier in table 9

Base from U.S. Geological Survey 

digital line graph 1:24,000

Figure 3. Location of observation wells installed between 1997 and 1999 for the study.

8 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
97°30' 

 T-7- ,., T.130N.

m$&&**^- 

W<' J '

_97°00' 

North Dakota

96°45'

___ .M L£H6.f'dCo ___ "omuaisuM____ _~p_ _. ,_

~S5rS«Scr^r~^~~ "|~B5BSrts-cS | south Dakota R2-97-33* R2-g7-34 , - l^JtoSf ^? T. 129 N. 

l : ,.,, ; f . ....Vl._ R2.97.31 ,- ~SS^% Va

____^, , ___ Itlkf: I (;

T. 128 N.

'' T. 125 N 

R2"-g7-22 /r\

.QB.50 V ,- 124N

T. 122 N.

0 2 4 6 8 10 MILES 

0 2 4 6 8 10 KILOMETERS

EXPLANATION

 TEST HOLE--Number is other R2-98-26 identifjer in tab|e g

Base from U.S. Geological Survey

digital line graph 1:24,000 R. 52 w.

Figure 4. Location of test holes drilled between 1997 and 1999 for the study.

Well and Test-Hole Data 9
Table 9. Selected site information for observation wells and test holes completed from 1997 through 1999

[--, not applicable]

Hydrologic andWate

I

SL

I

3

3"

i

i

H

iIio'

1I

o

3

1<s

o

Site identification 

number

452218096331801

452400096370401

452448096441701452352096402301452211096365901

452211096365902

452210096404701452212096480801452144096442301452210096514701

452213096575001

452213096564601452210097023101452212097022702451936097022601

451936097022602452213097063101452218097095101

451936097061201 451934097095301

451934097095302

Local number

L22N47W21AAAD

122N48W 1DDDA

122N48W6BBBA122N48W10BABB

L22N48W13DDDD

122N48W13DDDD2122N48W16DDDC122N49W16DDDC122N49W24DAAA122N50W13DDDC

122N50W17CCCC

122N50W17DDDC122N51W4DDDDR

122N51W4DDDD2R

122N51W27BBBB R

122N51W27BBBB2R

122N52W 1DDCC R

122N52W 9AAAA3 R122N52W24DDDD R 

122N52W27BBBB R122N52W27BBBB2 R

Other A .. identifier Aquifer

R2-98-13

R2-98-19

R2-98-18R2-98-20R2-98-14R2-98-15 UndeterminedR2-98-16R2-97-47R2-98-17

R2-97-46 Wilmot1

R2-98-25R2-99-14R2-98-32R2-99-11 Eden

R2-98-26

R2-98-27 Prairie Coteau 1R2-98-31 Eden

R2-98-34R2-98-28 R2-98-29

R2-98-30 Lonesome Lake 1

Depth 

drilled 

(feet)

122

82

402

142

270

102

162182142

82

202

364862

452

627302

462

667

522 

477242

Measuring Date of Water level, Land 

point, in feet water-level in feet surface 

above land measure- below land altitude 

surface ment surface (feet)

990

1,000

1,1531,0901,088

2.25 09-13-99 19.89 1,088

1,118

1,1651,130

1.5 08-25-99 20.47 1,224.6

1,475

1,390

1,960

2.0 12-08-99 208.73 1,962.2

2,025

2.25 09-14-99 221.01 2,0253.4 09-15-99 164.67 1,946

1,8721,968

1,875

2.3 09-14-99 51.54 1,875

Top of 

screen, in 

feet below 

land 

surface ----- 90--54-- 426.5 - 282

412-- 222

Bottom of 

screen, in 

feet below 

land 

surface -----100

~--74~~

446.5 - 302

432-- 242
Table 9. Selected site information for observation wells and test holes completed from 1997 through 1999-Continued

[--, not applicable]

Well andTe

1o(D

1

Site identification 

number

452724096442201452714096514501452728097011401452507097061001452448097023001452218097022902452727097095401452626097061201452450097095501453234096514201453222096475701

453002097022701

452958097060901453002097060902453234097095901453204097100202 

453003097110901 453738096515401453738096515402 453511096534301453751097094901

Local number

123N49W24AAAA

123N50W24AAAD123N51W2CCCCR123N51W19CBCB R123N51W21DDDDR123N51W21DDDD2R123N52W3CCCCR

123N52W13AADAR123N52W21DDDD R

124N49W19BBBC124N49W21ADAD

124N51W28AAAAR124N51W30BBBB R124N51W30BBBB2R

124N52W9AAACR

124N52W 9AAAC2 R 

124N52W29AAAA 

125N50W12ABCCR

125N50W12ABCC2R 125N50W23CCCDR125N52W10BBBB R

Other . .. identifier Aqulfer

R2-98-21

R2-98-24R2-98-33R2-99-05

R2-99-02R20-99-48 Undetermined

R2-99-01R2-99-03R2-99-04R2-98-22

R2-98-23

R2-97-48R2-99-06

R2-99-13 MardayR2-99-09R2-99-10 Undetermined 

R2-98-35 R2-97-23R2-97-43 Veblen 1 R2-97-22R2-97-21

Depth 

drilled 

(feet)

102

182

502792

792

138

507

22

682

122122

512

847

422

807

132 

720 

142

62

142

82

Measuring Date of Water level, Land 

point, in feet water-level In feet surface 

above land measure- below land altitude 

surface ment surface (feet)

1,045

1,170

1,5001,990

1,824

1.8 12-08-99 27.23 1,819.4

1,900

2,0052,002

1,130

1,095

1,501

2,060

1.9 12-08-99 323.44 2,053.1

2,005

1.1 12-08-99 49.57 2,003.0 

1,965 1,120

2.1 08-25-99 59.85 1,120.8 

1,1601,970

Top of Bottom of 

screen, in screen, in 

feet below feet below 

land land 

surface surface ------- 118 138

..--------- 373 413..

112 132

52 62

..
Table 9. Selected site information for observation wells and test holes completed from 1997 through 1999-Continued

[--. not applicable]

Hydrologic andW

£(D

61

3

I^

*+ 31

to31

I

H

a

3) i1

1I5

c

fifi

Site identification 

number

453659097104601

453659097104502454303096451701454305096451901454157096462501454306096584301454030097021901

454305097060901

454033097122101454541096400501454541096400502454541096473901454817096584601454818096550601

454818096550602454820097023601454820097023602454543097022701454819097102101454538097061101

454538097061102

Local number

125N52W16BABB R

125N52W16BABB2 R126N49W11AABAR

126N49W11ABAAR

126N49W15ADDAR

126N50W 6CCCC R

126N51W27BBBBR126N52W 1DDDD R

126N52W20CCCB R127N48W21DDDCR127N48W28AAAAR

127N49W21DDDCR127N50W 7BBBB R

127N50W 9AAAA R

127N50W 9AAAA2 R127N51W9AAAAR127N51W9AAAA2R127N51W21DDDAR127N52W 4DCDC R127N52W25AAAAR127N52W25AAAA2 R

Other . .. identifier Aquifer

R2-99-07

R2-99-12 Eden 1

R2-97-42 Fairmount 1R2-97-41

R2-97-24

R2-97-36

R2-97-05R2-97-09

R2-99-08

R2-97-44R2-97-45 Rosholt

R2-97-40

R2-97-37

R2-97-38R2-97-39 Rosholt

R2-97-06

R2-97-07 Veblen

R2-97-08

R2-97-19

R2-97-10

R2-97-11 Undetermined

Depth 

drilled 

(feet)

942

424

262522222202

6282

747282

72

282

222

162

82

242

102

155

102182

42

Measuring Date of Water level, Land 

point, in feet water-level in feet surface 

above land measure- below land altitude 

surface ment surface (feet)

1,990

2.2 12-08-99 296.95 1,987.92.3 04-06-99 78.11 1,109.7

1,111

990

1,1641,215

1,252

2,035

1,090

2.0 08-25-99 45.93 1,090.8

1,0921,168

1,119

2.0 08-06-99 29.39 1,119.2

1,188

1.8 08-06-99 30.95 1,188.7

1,1551,2311,182

1.9 08-06-99 3.97 1,182.4

Top of Bottom of 

screen, in screen, in 

feet below feet below 

land land 

surface surface -- 403 423

242 262 -~----62 72 ----72 82

..

92 102

-.

23.1 33.1
Table 9. Selected site information for observation wells and test holes completed from 1997 through 1999-Continued 

[--, not applicable]

i

Bl3a 

51

%fo

(D 

D

Site identification 

number

455123096434701455055096434801455341096434701455341096435001455104096473501455334096512001

455058096511801455058096511802455058096511803455054096550201455054096582101455056097023101455332097061301455335097061501455337097095501455337097095502455049097095501455557096470201455543096510701

Local number

128N48W19BCCCR

128N48W30BBBB R

128N49W 1DDADR128N49W 1DDAD2 R

128N49W21DDADR

128N50W 1DDDCR

128N50W25AAAB R128N50W25AAAB2 R128N50W25AAAB3R

128N50W28AAAA R

128N50W30BABB R128N51W27BBBBR128N52W 1DDDD R128N52W 1DDDD2 R128N52W 3CCCB R128N52W 3CCCB2 R128N52W27BBBC R

129N49W27BACC R

129N49W30CBBBR

idemifier Aquifer

R2-97-30 Fairmount 1

R2-97-29R2-97-31R2-97-32 Rosholt

R2-97-35

R2-97-28R2-97-25

R2-97-26 RosholtR2-97-27 Rosholt

R2-97-14R2-97-13

R2-97-12R2-97-15R2-97-18 Veblen 1

R2-97-16R2-97-17 Veblen1R2-97-20 Veblen 1R2-97-34R2-97-33

Depth 

drilled 

(feet)

234252262

142

322222

258202

62

342242282262

162

242

142152

292302

Measuring 

point, in feet 

above land 

surface

1.7

~-2.2 -----1.6

2.1

~---2.2 -2.3

2.5 - Date of water-level measure- ment 08-06-99 ~- 08-06-99 ---~ 08-06-99 08-06-99 ----- 08-06-99 - 08-06-99 08-06-99 - Water level, in feet below land surface 15.90 ---8.64 --~21.91 12.08 ~~~~25.43 ~12.42 35.78 ~ Land surface altitude (feet) 1,078.6 1,092 1,072 1,071.7 1,076 1,903 1,096 1,095.9 1,095.4 1,102 1,172 1,222 1,204 1,204.2 1,195 1,194.8 1,213.7 1,068 1,101 Top of screen, in feet below land surface 207-- 132-~- 19052---- 152-132 120- Bottom of screen, in feet below land surface 227--142~-~ 20062---- 162-142 130- Preliminary selection of aquifer.
The SDDENR has installed observation wells 

throughout South Dakota and frequently measures the 

water levels in these wells. Fifty-seven SDDENR 

observation wells that are located within or near either 

Roberts County or the former boundary of the Lake 

Traverse Reservation also have been incorporated into 

the study. Selected information for the SDDENR 

observation wells is presented in table 10, and the locations are shown in figure 5. Hydrographs through 1996 

are presented in Carter and Thompson (1999), and 

hydrographs for 1997 through 1999 are presented in 

Section B of the Supplemental Information section. 

The altitudes of most of these wells that are located in 

Roberts County have been determined using GPS 

software.

The NDSWC has installed observation wells 

throughout North Dakota. Eighteen of these NDSWC 

observation wells are located within or near the former 

boundary of the Lake Traverse Reservation. Selected 

site information for the 18 NDSWC observation wells 

is presented in table 10, and the locations are shown in 

figure 5. Water-level data collected through 1996 are 

published in Carter and Thompson (1999). Water-level 

data collected after 1996 are presented Section B.

The wells in table 10 are identified by the 

15-digit station identification number based on their 

latitudes and longitudes, the USGS local number based 

on the Federal land-survey system, both assigned by 

the same methods previously described. The other 

identifier (table 10) for the South Dakota wells was 

designated by the SDDENR or SDGS. The SDDENR 

identifier denotes the county (CD, Codington; GT, 

Grant; DA, Day; ML, Marshall; RB, Roberts) followed 

by the year in which it was drilled and a sequence 

number or letter. For example, RB-77D denotes the 

fourth observation well installed in 1977 in Roberts 

County. The SDGS identifier denotes a well name 

from a previous study, or the rig number, followed by 

the year drilled, followed by a sequence number. For 

example R2-97-28 denotes the 28th hole drilled by 

rig 2 in 1997. The other identifier (table 10) for the 

North Dakota wells was designated by the NDSWC.

GROUND-WATER DATA

The major aquifers in the study area consist of 

unconsolidated glacial drift and alluvial deposits. The 

major glacial aquifers that are present in the study area 

in South Dakota include the Big Sioux, Coteau Lakes, 

Fairmount, Prairie Coteau, Revillo, Veblen, Rosholt, 

Roslyn. Lonesome Lake, Eden, Marday, Altamont, and

Wilmot aquifers. The major glacial aquifer present in 

the study area in North Dakota is the Spiritwood 

aquifer. Because several different studies have been 

conducted in the area and the aquifers in these studies 

were named for a localized area, it is possible that some 

of these aquifers are interconnected but named differently based on location. This issue will be addressed 

during the interpretive part of this study.

Hydrographs

Water levels have been compiled for a waterlevel network consisting of 57 SDDENR observation 

wells, 38 existing SDGS and SDDENR observation 

wells from miscellaneous local studies, 18 NDSWC 

observation wells, and 50 observation wells completed 

for this study. Data collected from 1997 through 1999, 

and data from some wells that were measured for the 

first time in December 1996, are presented in this 

report.

Site descriptions and hydrographs for observation wells that were part of the water-level network are 

presented in Section B. The water levels are given in 

feet above (+) or below (-) land surface. A dashed line 

is shown on the hydrographs when the interval between 

water-level measurements exceeds 1 year. The data 

used to generate the hydrographs are available in the 

USGS Ground Water Site Inventory (GWSI) data base.

Water-Quality Data

Water-quality data from samples collected 

during 1997-99 are published in this report. All waterquality samples were collected by USGS personnel. 

Field measurements (and total coliform bacteria and 

immunoassay for pesticides, where applicable) were 

completed by South Dakota District or North Dakota 

District USGS staff. All other parameters were analyzed by the USGS National Water Quality Laboratory 

(NWQL) in Denver, Colorado. Analysis for bacteria 

and pesticides is generally only completed on wells 

with depths less than 100 feet. However, deeper wells 

were included when the 1997 observation wells were 

sampled. The locations of the sampling sites are shown 

in figure 6, and the analytical results are presented in 

table 11. Two additional wells (R2-96-56 and 

R2-96-58) are included in table 11 that do not appear in 

figure 6. These two wells were re-sampled for bacteria 

when the 1997 wells were sampled because they had 

not yet been sealed when sampled the first time.

14 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table 10. Selected site information for observation wells in water-level network 

[--, no data]

Ground-Wat5S

Station identification 

number

450205097073302445930097070901

450655097092301450538097083901450208097101401

450904097145501450947097060901451143097110501451141097061701450956097083401450814097091601450814097095301451050097161601451936096294001451844096305401451848096363501451418097045501451725097072101451606097072501 

451749097080601 451750097083001

451701097083701451716097095901

Local number

118N52W18BBBB2118N52W30CDCD119N52W 4ADDDR119N52W10DDDDR

119N52W33DCDCR

119N53W 6BBBB120N51W19BBCCR120N52W 9BBBB R120N52W12AAAB R120N52W23BBBB R120N52W27CDDDR120N52W28DDDD R120N54W23DDDC121N47W 1AAAA

121N47W 2DDDD

121N47W 6CCCC121N51W29BBBB R121N52W 1CBBBR121N52W 2ADDDR 

121N52W 2BAAAR 121N52W 2BBBA R

121N52W 2CCCCR

121N52W 3CCBB R

Other 

identifier

CD-77A

CD-76B

CD-77BCD-77CCD-60A

R2-85-111GT-77AGT-79C

GT-76CGT-76B

CD-76DCD-56A

DA-78HCO-86-03

CO-86-05GT-79EGT-77EGT-57AGT-82A 

R20-84-31 

CO-87-66R20- 84-26R20-84-25

Sequence 

number1

1

23

45

6

7

8

9

10

11

1213

14

15

16171819

20212223

County

Codington

CodingtonCodingtonCodingtonCodingtonCodingtonGrantGrantGrantGrantCodingtonCodingtonDayGrant

Grant

GrantGrantGrantGrant 

Grant GrantGrantGrant

Land 

surface 

altitude 

(feet)

1,775

1,753.21,7701,7701,745

1,8781,8951,8341,873.1

1,820.9

1,8001,781.6

1,830

1,092

1,115

1,1041,9551,885

1,881.3 

1,878.4 

1,885

1,869

1,857.9

Aquifer

~

Big SiouxBig SiouxBig SiouxBig Sioux

AltamontPrairie CoteauPrairie CoteauPrairie CoteauPrairie CoteauPrairie CoteauBig Sioux

Prairie Coteau

~--Prairie Coteau

Big SiouxBig Sioux 

Big Sioux Prairie CoteauBig SiouxBig Sioux

Depth 

drilled 

(feet)

180

50

2020

50

590

190

140185

140129

19

200

106

126

132

245

40

35 23 

153

18

25

Top of 

screen, in 

feet below 

land surface -24.9

7.6

9.2

25

520

172.1

109159.1

117.5

112.6 -194

93

121123

221.3 -16.8 

5 

140

8

5

Bottom of 

screen, in feet 

below lend 

surface -29.9

12.614.2

27

535

177.1124164.1122.5

128.6 - 198

106

126128

226.3 -21.8 

19 

150

1715
Zi

o

V

1

CD

C

"53

I 

oi 

TO

c

I

i

CD

co

.Q 

O

O

.2'eo

0] 

CO

£

»- o "D

o * c ,) 

c c jo o

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m 2 "* M

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(0

0)

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TJ

£

£ "D ^

*rf fl) ^ 

Q. (U

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£

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16 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table 10. Selected site information for observation wells in water-level network-Continued 

[--, no data]

9ound-Water Dg^

Station identification 

number

452213097095602

452212097083901

452122097072301

452119097083901452115097110601

451934097095302451841097110901

451822097072401452120097145001452633096453401

452722096552301

452721096525701

452537096525701452218097022902452728097122401

452724097114701

452540097130901452357097072401452330097083801452330097083802 452544097144802 452959096545901

453001096584801453002097060902

Local number

122N52W 9AAAA2R

122N52W11BBBBR122N52W12CCCCR122N52W14BBBBR

122N52W16BBBCR122N52W27BBBB2R122N52W32AAAAR

122N52W36BCCB2R122N53W11DDDDR123N49W24CCCC

123N50W22BBBB

123N50W23AAAA123N50W35AAAA123N51W21DDDD2R

123N52W 6DDDAR123N52W 8BAAAR

123N52W19BABAR

123N52W25CCCCR

123N52W35CBBB R

123N52W35CBBB2R 123N53W13CCCC2R 124N50W27BBBB R124N51W25AAABR124N51W30BBBB2R

Other 

identifier

CO-93-31

RB-93C

RB-76BRB-76ARB-82BR2-98-30

RB-77S

R20-84-34DA-78DRB-81B

R2-94-66RB-77L

RB-77M

R20-99-48

CO-93-28CO-93-26RB-81C

RB-81DCO-93-33CO-93-34 RO-7

R2-94-54R2-94-55R2-99-13

Sequence 

number1

4849

505152

5354

55

5657

5859

606162

63

64656667 

68 697071

County

Roberts

Roberts

RobertsRoberts

RobertsRoberts

Roberts

Roberts

Day

RobertsRoberts

RobertsRobertsRoberts

RobertsRoberts

Roberts

Roberts

RobertsRoberts 

Day 

RobertsRobertsRoberts

Land 

surface 

altitude 

(feet)

1,8721,921

1,904.91,897.9

1,855.51,878.4

1,851.7

1,8881,8301,148.61,240.31,175.2

1,216.11,819.4

1,8701,895

1,918

1,931.9

1,9101,910 1,874 1,210.11,274

2,053.1

Aquifer

Coteau Lakes

Prairie Coteau

Coteau LakesCoteau Lakes

Coteau LakesLonesome LakeCoteau Lakes

Big Sioux

Coteau Lakes -Revillo

RevilloRevillo -Coteau LakesCoteau Lakes

Coteau LakesCoteau LakesCoteau LakesCoteau Lakes Prairie Coteau 

RevilloRevilloMarday

Depth 

drilled 

(feet)

54

162

5050

35

242

110

28

40

140

242

170

200

138

40

47

26326420 81 

220

282

422

Top Of 

screen, in 

feet below 

land surface

32

151.5

26.528.1

16.6

222

18.1

9

27.4

97

202

146178.1118

2329

8.1

19

41.5

8 

176.83

256

373

Bottom of 

screen, in feet 

below land 

surface

42

156.5

31.533.1

21.6

242

23.12832.4

107

212

151

183.1138

3339

18.1

29

51.5

18 

186.83

266

413
05 Table 10. Selected site information for observation wells in water-level network-Continued

[ , no data]

Hydrologic andWs

»

0

c 8L .§'

D

1

is gIc

CQ

CO

8i

H

1i

Qio3.

3)

1wO§

f

1

1i

Station identification 

number

453240097022701453204097100202453815096584001453752096584001453752096580301

453752096580302453725096572801453751096572401453700096572702

453700096572701453738096515402

453514096561402453752096591801453752096591802453658096591702453331097045301453751097060702

453659097104502453515097083801453700097144901

454304096511302454303096451701454028096550001453819096572501

Local number

124N51W4DDDDR124N52W 9AAAC2R125N50W 6CBBB R125N50W 6CCCCR125N50W 6DCCCR125N50W 6DCCC2R

125N50W 7ADDDR125N50W 8BBBA R

125N50W 8CCCC2R

125N50W 8CCCC3R125N50W12ABCC2R

125N50W20DDDD2R

125N51W 1DCCCR125N51W 1DCCC2R

125N51W13ABBB2R

125N51W32CCCCR125N51W7BBBB2R

125N52W16BABB2R125N52W23CCCCR125N53W12CCCC R

126N49W 7BBBB2R

126N49W11AABAR

126N50W21DDDDR

126N50W32CCCB R

Other 

identifier

R2-95-01R2-99-10R2-93-53

RB-81-15

RB-81-16RB-81-17

R2-93-54

RB-11

RB-7W

RB-7E

R2-97-43

RB-5

RB-12E

RB-12W

RB-10R2-96-01

R2-95-05

R2-99-12

CO-93-19CO-93-42

R2-96-56R2-97-42R2-96-48

RB-79D

Sequence 

number1

72737475767778

79

80

8182838485

86878889

9091

929394

95

County

RobertsRobertsRobertsRobertsRoberts

Roberts

Roberts

RobertsRoberts

RobertsRoberts

Roberts

Roberts

Roberts

Roberts

Roberts

Roberts

RobertsRobertsMarshall

RobertsRobertsRoberts

Roberts

Lsnd

SZ *<"""'

(feet)

1,425 Revillo

2,003

1,225

1,2001,2301,2311,205

1,2161,207

1,2071,120 Veblen

1,215

1,215

1,2151,2221,660.1 Revillo1,525 Roslyn1,987.9 Eden1,972 Coteau Lakes

1,875 Coteau Lakes

1,098.5 Rosholt

1,111 Fairmount

1,165.1 Veblen1,164.4 Veblen

Depth 

drilled 

(feet)

423

132

8890

155

5083

140

70

23

622068

32

16

657

102

423

22

97

101

262

202

112.1

Top of 

screen, in 

feet below 

land surface

397.5

112

783797.441.878

105.1

65

19.8

52

16.1

52.7

20.3

10.6

605

92

403

14-695

242

168

97.1

Bottom of 

screen, in feet 

below land 

surface

407.5

132

83

40

201.4

47.8

83

110.1

7022.862

19.1

63.725.3

15.6

645

102

423

19-- 79.5

262

178

112.1
Table 10. Selected site information for observation wells in water-level network-Continued 

[--, no data]

o

IB

^s

^

Station identification 

number

453928096595601453844096591801454911096384601454818096434501

454818096434502454737096424801454634096434501

454541096400502454818096473002454658096450301454658096450402

454449096450201454550096491302

454449096450101454818096550602454547096584301454541096550001

454523096511602454910097011501454820097023602 454838097061102454818097060401

455334096372102455336096400301

Local number

126N51W35AADAR

126N51W36DCCCR127N48W 2BBBBR

127N48W 7BBBB R127N48W 7BBBB2R127N48W 7DDBBR127N48W18DDDDR127N48W28AAAAR127N49W10BBBB2 R

127N49W14DAAAR127N49W14DAAA2R

127N49W26DDDDR127N49W29DCDC2 R127N49W36BBBB R

127N50W 9BBBB2R127N50W19CCCB R127N50W21DDDD R

127N50W25ADAD2R127N51W 3AAAAR127N51W 9AAAA2R 127N52W25AAAA2R127N52W7CCCDR128N48W 1CCDC2R

128N48W 4DDDDR

Other 

identifier

RB-79CRB-20RB-77FRB-77GRB-77HRB-77ARB-77BR2-97-45R2-96-53

RB-771

RB-77JRB-77CLTR-16RB-77KR2-97-39

LTR-2R2-96-50

R2-96-58RB-81A

R2-97-07 

R2-97-11R2-95-08R2-96-62R2-96-63

Sequence 

number1

96

97

9899

100101102103

104105106107

108109

110

111

112

113114115 116

117

118119

County

RobertsRobertsRobertsRoberts

Roberts

RobertsRobertsRobertsRoberts

RobertsRoberts

RobertsRobertsRobertsRoberts

RobertsRoberts

RobertsRobertsRoberts RobertsRobertsRobertsRoberts

Land 

surface altitude 

(feet)

1,160.6

1,200

1,0691,079.9

1,079.71,1001,097.7

1,090

1,089.2

1,109.31,109.9

1,124.5

1,111.4

1,1291,120

1,175.41,139

1,099.51,226.31,192 1,1881,1971,021.81,046.6

Aquifer

~-RosholtRosholt

FairmountRosholtFairmountRosholt

RosholtFairmountRosholtFairmount

RosholtRosholt

Rosholt

Veblen

VeblenRosholtVeblenVeblenVeblenFairmountFairmount

Depth 

drilled 

(feet)

5164

80

50

245

77

240

7362

170

80

270

90

125

82

203

175

80

275

112 

42

147

222252

Top of 

screen, in 

feet below 

land aurface

35.2

57.7

38.538.4

197.4

59.4

208.7

6352

158

75

265

80

118.5

72

109138

66

185.88

104

23

128

198

218

Bottom of 

screen, in feet 

below land 

surface

50.263.7

43.543.4

202.4

64.4

213.7

73

62

163

80

270

90

123.5

82

119

148

76

197.88

94

33

138

203238

(O
Table 10. Selected site information for observation wells in water-level network-Continued

[--, no data]

Hydrologic andW

|cSL

 J

f

135

1

iET£

1i

3J

!

1|!c

1

1in'SI§

Station identification 

number

455423096434501455123096434701455148096423101

455005096411801455341096435001455146096500001455003096434701

455333096550002455148096550001455147096551301

455057096561501455058096511802455058096511803455148097001401455608097010801455335097061501455337097095502

455053097061702

455053097061701455049097095501455329097172501455606097322901455457096395201455611096520101

Local number

128N48W 6BBBB R128N48W19BCCC R128N48W20BBBB R

128N48W29DDDDR128N49W 1DDAD2R128N49W20BBBB R128N49W36AAAAR128N50W10BBBB2 R

128N50W21AAAAR128N50W21AABA R

128N50W21CCCC R

128N50W25AAAB2 R128N50W25AAAB3 R128N51W23AABAR

129N51W26BBB2R

128N52W 1DDDD2R128N52W 3CCCB2R128N52W25AAAB2R

128N52W25AAAB R128N52W27BBBC R128N53W10BBBB R128N56W 3BBBB

129N48W33ADDA R

129N50W24CCDR

Other 

identifier

LTR-10R2-97-30RB-77D

RB-77ER2-97-32

LTR-6LTR-21

R2-95-18LTR-5RB-79ARB-79B

R2-97-26R2-97-27LTR-4

12276B

R2-97-18R2-97-17R2-95-10

R2-95-09R2-97-20ML-69AML-70CLTR-9

12186A

Sequence 

number1

120

121122

123124

125

126127128129130

131132

133

134135

136

137

138

139140141142143

County

Roberts

RobertsRoberts

RobertsRobertsRobertsRobertsRobertsRobertsRobertsRoberts

RobertsRobertsRobertsRichland

RobertsRoberts

Roberts

Roberts

RobertsMarshallMarshallRobertsRichland

Land 

surface 

altitude 

(feet)

1,098.21,0801,070.7

1,081.51.0741,082.61,078.9

1,092.3

1,093.7

1,094.3

1,112.8

1,0951,095

1,210.01,198.7

1,205

1,201

1,188

1,188

1,212

1,2501,3521,051.71,089.5

Aquifer

FairmountFairmountRosholt

RosholtRosholtFairmountFairmountRosholtFairmountRosholt

RosholtRosholtVeblenVeblenVeblenVeblenVeblen

VeblenVeblenVeblen -FairmountRosholt

Depth 

drilled 

(feet)

282234

95

110142

223

240

57

283

127

50

202

62

283

80

162142163

222

152

215230253215

Top of 

screen, in 

feet below 

land surface

249207

38

58.4

132

190

191

47

210

109.7

26.7

190

52

170

75

152

132153

191

130120

~

222

198

Bottom of 

screen, in feet 

below land 

surface

259

227

43

63.4

142

200

201

57

220

124.7

41.7

200

62

180

80

162

142

163

201

120

232203
Table 10. Selected site information for observation wells in water-level network-Continued

[--, no data]

Station identification 

number

455611096520102455611096520103455607096545002455755097045501

455701097051501

455932097092401455610097110901455608097061702455842097210301455842097173701455606097172501

460118097230501460118097230502

455914097231801455607097211501460117097195801460117097195802460033097245701

0 455909097245901§ 455941097234001 a 

Locsl number

129N50W24CCD2R129N50W24CCD3R129N50W27BBBB2R129N51W 8CCCR

129N51W19ABAR

129N52W14AAA

129N52W21CCCR

129N52W25AAAB2R129N53W 7BBAR129N53W 9AAAR129N53W27BBBB R

129N54W 1AAA129N54W 1AAA2

129N54W 3ADDR129N54W25AAAAR

130N53W 4BAA

130N53W 4BAA2

130N54W27CCCR

130N54W33DDDR130N54W35CCCR

Other 

identifier

12186B

12186C

R2-95-21

1303713422

13494

12277

R2-95-1392489249ML-70A

13452

1345312263

ML-70B

1344713448

12261

12262

9247

Sequence 

number 1

144145146

147

148

149150151

152

153154155

156157158

159160

161

162

163

County

RichlandRichland

RobertsRichland

Richland

Richland

Richland

RobertsSargentSargent

Marshall

SargentSargent

Sargent

Marshall

SargentSargentSargentSargentSargent

Land 

surface altitude 

(feet)

1,089.51,089.5

1,106

1,196.21,191.2

1,220

1,221.2

1,1961,171

1,1701,2551,162

1,162

1,186

1,260

1,1631,1631,1801,1581,170

Aquifer

RosholtRosholt -VeblenVeblen

Veblen

Veblen

Veblen

SpiritwoodSpiritwood

Veblen

Spiritwood

Spiritwood

Spiritwood

Veblen

SpiritwoodSpiritwoodSpiritwoodSpiritwoodSpiritwood

Depth 

drilled 

(feet)

143

90

171

240

240

270280

178

220240260231

80

200

230260

175190

200240

Top of 

screen, in 

feet below 

land surfsce

137

82

161

148

128

78

128168

178

198100

195

65

125

120

204

163158138188

Bottom of 

screen, in feet 

below land 

surface

142

87

171

153

133

83

133178

184

201- 200

70

128140

209

168163145191

!» 'Sequence number is used to identify the wells in figure 5.
97°30' 155,156 

46°00 te 

R. 55 W.

c#? T- 129 N -

T. 128N.

3/^1 jls7l44,145

__ __ inattin j.

^135 * ,4 127fc x

1'i

* *;r:»i 121*

~_J$2 '>r>'V^er \ , \. T

'*^.^;»^N .a / x\

R. 50 W. R- 49 W. R. 48 W.

45°1£

\ ^ ?XI' J'J<1 23^ i9

^S? Pfle £ L 

-." -iaffVA28 ^'* 121 N.

96°30'

T. 122 N.

0 2 4 6 8 10 MILES

| i'i ,' i ', i'i | i'i ' ' ' '

0 2 4 6 8 10 KILOMETERS

T.120N.

EXPLANATION 

OBSERVATION WELL-Number is 

sequence number in lable 10

T. 119 N.

w/T

Base from U.S. Geological Survey 

digital line graph 1 :24,000

i U )% \ «1^

K_ V 2

'' V ^.118N.

v 

R. 52 w.

Figure 5. Location of selected observation wells in and near study area, which were part of the water-level monitoring 

program.

22 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Rasarvation/Roberts County Investigation
T. 130 N.

__,_ - - -.

i R0 'lf qjl T. 129 N.

Sargent Co___ 

Marshall Co :^

R- 54 W. _ Marshali Co

!

EXPLANATION

OBSERVATION WELL-Number is

. 96°30'

T.122N.

0 2 4 6 8 10 MILES

| | l | I | I ^ | , ', ' '

0 2 4 6 8 10 KILOMETERS

T. 11SN

Base from U.S. Geological Survey V 

digital line graph 1:24,000 R 52 w.

Figure 6. Location of ground-water sites sampled during 1997-99.

Ground-Water Data 23
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24 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Table 1 1 . Water-quality data from observation wells sampled by the U.S. Geological Survey from 1 997-99 Continued

[Bold type indicates values above maximum contaminant level or SD Domestic Water Supply Criteria. |iS/cm, microsiemens per centimeter; mg/L, milligrams per liter; |ig/L, micrograms per liter; 

mm, millimeter; mV, millivolt; mL, milliliter; pCi/L, picocuries per liter; deg C, degrees Celsius; FET, fixed end point titration; IT, incremental titration; <, less than; , no data]

Local number

122N48W13DDDD2

122N50W13DDDC122N51W 4DDDD2R

122N52W27BBBB2 

R

123N51W21DDDD2R

124N52W 9AAAC2 

R

125N50W12ABCC2R

126N49W 7BBBB2 

R

126N49W11AABA2R

127N48W28AAAAR127N50W 9AAAA2 

R

127N50W25ADAD2 

R

127N51W 9AAAA2 

R

127N52W25AAAA2R

128N48W19BCCC 

R

128N49W 1DDAD2R128N50W25AAAB2 

R

128N50W25AAAB3 

R

128N52W 1DDDD2R128N52W 3CCCB2R128N52W27BBBCR

Maximum contaminant

Supply Criteria

Other

identifier

R2-98-15

R2-97-46

R2-99-11

R2-98-30

R20-99-48

R2-99-10R2-97-43R2-96-56R2-97-42R2-97-45R2-97-39R2-96-58R2-97-07R2-97-11R2-97-30

R2-97-32

R2-97-26R2-97-27

R2-97-18

R2-97-17R2-97-20

Date

09-13-99

05-15-9809-14-9909-14-99

'09-14-99

09-14-9909-13-9905-15-98

05-11-98

05-14-98

05-14-98

05-14-98

05-11-98

05-14-98

1Q5-14-98

05-13-9805-12-98

05-12-98

05-12-9805-12-98

05-13-98

05-13-9805-13-98

level or SD Domestic Water

Solids,

residue at

180 deg 

C

dissolved

(mg/L)

(70300)

958

1,790

1,460

383386690

1,640

2,360

..

734

1,0501,060

~

800

786

1,040

928

581

2,260

1,3301,220

822

778

1,750

Nitrogen,

ammonia,

dissolved

(mg/L

asN)

(00608)

2.24.3

6.03.93.9

.35.72

<.02

1.1

.43.95

- .22

.57.04.02

1.1

.02.61

.76

.48

1.2

_ Nitrogen, nitrite, dissolved (mg/L asN) (00613) 0.01 <.01 .01 .01 .01 .01 .01 <.01 ..<.01 <.01 <.01

-<.01

<.01<.01<.01

<.01

.01

<.01

<.01

<.01<.01

1

Nitrogen,

NO2+NO3 ,

dissolved

(mg/L

asN)

(00631)

0.05

<.05

.05

.05

.05.05.05

7.8

..

<.05

<.05

<.05

-<.05

<.05<.05<.05<.05<.05<.05

<.05

<.05

<.05

10

_ Phospho- rus, ortho, dissolved (mg/L asP) (00671) 0.04 .07 .03 .23 .20 .01 .01 .07 ...06 .03 .02

-.01

.01.02

.14

.04.04.03.02.09

.04

_ Aluminum, Arsenic, dissolved dissolved (|ig/L (ng/L as Al) as As) (01106) (01000) 15 1 <30 3 15 8 15 

9

15 815 

9

30 

4

<30 <1

_ <10 20

<10 41<10 22

- <10 10

<10 10<10 1<10 <1<10 39<30 3<10 48<10 49<10 48

<10 11

50

Boron,

dissolved

(ug/LasB)

(01020)

235

1,770

500275268

116

327

138

_ 841

130

593

- 198

205321

1,310

303

1,570

143

494

318334__ Iron, dissolved (|ig/L as Fe) (01046) 2,800 1,200 2,200 1,700 1.700 990 1,600 <30

_ 750

1,300

2,100

- 2,400

2,500

3471

440

2,000

1,700

640

260

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Ground-Water Data 27
The collection of the ground-water samples 

followed methods presented in Wood (1976). All 

ground-water sampling equipment that came in contact 

with the sample water (submersible pump and tubing) 

was cleaned prior to the sampling trip with a phosphate-free detergent, dilute hydrochloric acid, and 

deionized water by procedures described by Horowitz 

and others (1994). After samples were collected from 

a well, the pump and tubing were rinsed with deionized 

water before sampling the next well.

In order to assure that a representative sample 

was collected from the aquifer at each well, the groundwater samples were collected after purging a minimum 

of three casing volumes from the well and after field 

measurements of specific conductance, pH, temperature, and dissolved oxygen had stabilized (Wood, 

1976). Stability was reached when specific conductance differed less than 5 percent between readings, pH 

differed less than 0.1 standard unit between readings, 

and water temperature differed less than 0.2°C between 

readings. Samples were collected from the observation 

wells using a positive-displacement, stainless-steel 

submersible pump. A Keck pump was used for sampling the 1997 observation wells, and a Grundflos 

Rediflo2 was used for sampling the 1998 and 1999 

wells. Water from the observation wells passed 

through a flow-through chamber without coming into 

contact with the atmosphere so that field measurements 

were measured in a closed system. The water-quality 

samples were collected in appropriate bottles directly 

from a Teflon collection tube.

Quality-Assurance Data

Quality-assurance procedures were performed to 

evaluate the precision and accuracy of the reported analytical results. The procedures were designed to verify 

that no significant biases were introduced to the data 

during either field sampling and processing, or during 

laboratory analysis of the samples. Quality-assurance 

procedures for the USGS NWQL included analyses of 

reference and calibration materials and internal 

analyses of blanks, replicates, and spiked samples. 

Quality-assurance procedures for the USGS NWQL 

are presented in Friedman and Erdmann (1982) and 

Pritt and Raese (1992). Field meters were calibrated 

daily for pH, dissolved oxygen, oxidation reduction 

potential, and specific conductance during sampling.

Quality-assurance samples collected during this 

study included duplicates, laboratory blanks, and field

blanks. Duplicate samples are two samples collected 

as close in time as possible and are considered to be 

essentially identical in composition. They are collected 

to evaluate variability in the data that may be attributed 

to either field-collection and processing procedures, or 

laboratory and analytical procedures.

Two duplicate sample sets were collected for this 

study during 1997-99. The two duplicates were for 

ground-water quality samples, the only water-quality 

samples taken after 1996. The data indicated that the 

analytical results for the duplicate pairs generally 

compared very well and were not substantially 

different (table 11).

Blank samples, which included both laboratory 

and field blanks, were collected and analyzed to identify the presence and magnitude of contamination that 

potentially could bias analytical results. Laboratory 

blanks are samples of ultrapure deionized water that are 

processed through the sampling equipment used in this 

study within a laboratory or other controlled environment; laboratory blanks are used to identify sample 

contamination introduced from the sampling equipment. Field blanks are samples of ultrapure deionized 

water that are processed through sampling equipment 

at the field collection site; field blanks are used to identify contamination introduced from the sampling 

equipment, and contamination introduced during collection and processing of samples in the field. Two laboratory blanks and two field blanks were collected for 

the ground-water-quality sampling during 1997-99.

Although some of the constituents in table 12 are 

at or near the concentrations found in table 11, this is 

due to the concentrations being at or near the reporting 

level for a particular constituent. One constituent does 

show an anomalous result that is unexpected for a 

blank sample. The analysis for lab alkalinity (parameter 90410) collected in a field blank on September 15, 

1999, is higher than that of the other blanks. A possible 

source of contamination lies in the method used to collect field blanks. The volume of ultrapure deionized 

water required to fill all sample bottles is calculated, 

and an additional volume is used as a safety factor. 

Because the length of the tube on the Grundflos pump 

is great, the tube itself holds a substantial amount of 

water and is difficult to purge completely. The ultrapure water is run through the pump, and after a period 

of time has elapsed, the discharge from the sample collection tube is assumed to have purged out any water 

that may have remained in the tube. Bubbles can sometimes be seen at the interface between the ultrapure

28 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
water and the previous contents of the tube. After the 

required volume of ultrapure water is fed into the 

pump, additional deionized water is needed to "push" 

the ultrapure water through the tube and into the 

remaining sample bottles. Because of the length of the 

tube, it would be possible for the ultrapure water to 

become mixed with the "push" water, or the water 

present in the tube before the blank sample was collected. If the first or last sample bottle was filled with 

mixed water, it could cause contamination, which may 

result in an erroneous value such as noted for lab alkalinity in the 1999 field blank. Because none of the 

other constituents for the 1999 field blank appear to 

have been impacted, any possible contamination is 

apparently limited to the alkalinity sample.

SURFACE-WATER DATA

Numerous streams and lakes are present within 

the study area. Portions of four major basins drain the

study area: the Upper Red River, the Minnesota River, 

the Big Sioux River, and the James River (fig. 7). The 

portion of the study area that contains the majority of 

the lakes is drained by the James and Big Sioux River 

Basins, although much of the area is noncontributing 

under normal conditions. Drainage from the Minnesota, Big Sioux, and James River Basins is to the Gulf 

of Mexico, and drainage from the Upper Red River 

Basin is to the Hudson Bay.

Streams

The major streams in the study area include the 

Big Sioux River, Bois de Sioux River, Little Minnesota 

River, North Fork Whetstone River, LaBelle Creek, 

and Big Coulee Creek. Eight streamflow-gaging 

stations currently operated by the USGS are located 

within or near the study area (fig. 7).

Table 12. Constituent concentrations for quality-assurance laboratory and field blanks

[|o.S/cm, microsiemens per centimeter; mg/L, milligrams per liter; |o.g/L, micrograms per liter, mV, millivolt; pCi/L, picocuries per liter; deg C, degrees 

Celsius; FET, fixed end point titration; IT, incremental titration; , no data]

Station number

442124098130700

MagneCalcium, slum, Sodium, Potassium, Alkalinity, 

dissolved dissolved dissolved dissolved lab 

(mg/L (mg/L (mg/L (mg/L (mg/L as 

asCa) asMg) asNa) as K) CaCO3) 

Local number Date (00915) (00925) (00930) (00935) (90410)

Equipment blank 09-13-99 0.078 0.12 0.146 0.24 2.096 

Equipment blank 05-11-98 .021 .004 .1 .1 1.899 

Field blank 05-15-98 

Field blank 05-15-98 .323 .061 .1 .1 2.9 

Field blank 09-15-99 .534 .164 .085 .24 382.83

Local number

Equipment blank

Equipment blank

Field blank

Field blank

Field blank

Sulfate, Chloride, Fluoride, 

dissolved dissolved dissolved 

(mg/L as SO4) (mg/L as Cl) (mg/L as F) 

Date (00945) (00940) (00950)

09-13-99 0.21 0.29 0.1

05-11-98 .432 .163 .1

05-15-98

05-15-98 .285 .12 .1

09-15-99 .8 .29 .1

Solids, 

Silica, residue at Nitrogen, 

dissolved 180 deg C, ammonia, 

(mg/L as dissolved dissolved 

SiO2) (mg/L) (mg/L as N) 

(00955) (70300) (00608)

0.09 10 0.02

.1 10 .057

-

.1 10 .06

.089 10 .02

Surface-Water Data 29
Table 12. Constituent concentrations for quality-assurance laboratory and field blanks Continued

[uS/cm, microsiemens per centimeter; mg/L, milligrams per liter; ug/L, micrograms per liter; mV, millivolt; pCi/L, picocuries per liter; deg C, degrees 

Celsius; FET, fixed end point titration; IT, incremental titration; , no data]

Local number

Equipment blank

Equipment blank

Field blank

Field blank

Field blank

Date

09-13 99

09-13-99

05-15-98

05-15-98

09-15-99

Nitrogen, 

nitrite, 

dissolved 

(mg/L as N) 

(00613)

0.01

.01

-

.01

.01

Nitrogen, 

NO2+NO3, 

dissolved 

(mg/L as N) 

(00631)

0.05

.05

-

.05

.05

Phosphorus, 

ortho, 

dissolved 

(mg/L as P) 

(00671)

0.01

.013

-

.043

.01

Aluminum, 

dissolved 

(ug/L as Al) 

(01106)

15

10

-

10

15

Arsenic, 

dissolved 

(ug/L as As) 

(01000)

1

1

-

1

1

Boron, 

dissolved 

(ug/L as B) 

(01020)

16

16

-

16

8.718

Local number

Equipment blank

Equipment blank

Field blank

Field blank

Field blank

Date

09-13-99

09-13-99

05-15-98

05-15-98

09-15-99

Iron, 

dissolved 

(ug/L as Fe) 

(01046)

10

10

-

10

10

Manganese, 

dissolved 

(ug/L as Mn) 

(01056)

4.262

4

-

4

1.672

Selenium, 

dissolved 

(ug/L as Se) 

(01145)

1

1

-

1

1

Alpha, radio, 

dissolved 

as Th-230 

(pCi/L) 

(04126)

3

3

-

3

3

Alpha, count, 

2 sigma, 

dissolved 

as Th-230 

(pCi/L) 

(75987)

0.51

.35

-

.38

.51

Gross beta, 

dissolved 

(pCi/L as 

Cs-137) 

(03515)

4

4

-

4

4

Local number

Equipment blank

Equipment blank

Field blank

Field blank

Field blank

Date

09-13-99

09-13-98

05-15-98

09-15-98

09-15-99

Beta, 

2 sigma, 

dissolved 

asCs-137 

(pCi/L) 

(75989)

0.72

.68

-

.74

.76

Total 

coliform, 

(colonies/ 

100 mL)

-

-

-

-

-

Atrazine, 

dissolved 

(ug/L) 

(34756)

-

-

<0.05

-

-

Carbofuran, 

dissolved 

(ug/L)

-

-

<0.06

-

-

Cyanazine, 

dissolved 

(ug/L)

-

-

<0.04

-

-

2,4-D, 

dissolved 

(ug/L)

-

-

<0.7

-

-

30 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
T. 130N.

i 05051650^' ,r'Px-> 

X S*' '

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Minnesota vi ,* , 

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>^~"" '05050000 'S T

fjRosholt -.-. A i-

...

Sausli

od i

r

T, "'. '"" Sirfi 

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T. 127 N.

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ieton

^T.iaeN.

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I,^/.«;,,»«_T^A * ^"S^ River !'ta" i -J' '.125N.

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/ V

\, 'T") y/T" Np^A^nc^^ }

i^'V^^ri; ^-^C^ v^;^}^/

0' V" />,<*Tf?M Bjp OBfwj ^ ^^..-05289985^. < '.M,,,

\ Y-a.-,.. » i. r i _/s _ ~+- ___ -n 

45"30' V- ,>,A,rfT\( R;P O«<T.WJ * - 05289985A J -.M,,rf "^ \\

L8 "fe V _ .^r^r-^lAJ* Basin \

"t:i \ V >K^V X .. .. . ^.T.123N. 

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rtM ; ^

45°15'

R. 53 W.

Base from U.S. Geological Survey 

digital line graph 1:24,000

,06479215

GrantCo/ T. 120 N. 

jlon 2o

R. 51 W. 

T. 119N.

v ^06479438 

' V T.118N.

V

R. 52 W.

J_^-____ __

., ,,, 05292000

150W R.49W. R.48W. R.47W. A

05291000 A

0 2 4 6 8 10 MILES

| i i i i l i i i i i

0 2 4 6 8 10 KILOMETERS

EXPLANATION 

^--^ DRAINAGE BASIN BOUNDARY

A CONTINUOUS-RECORD STREAMFLOW05050000 GAGING STATION-Number is station 

identification number

Figure 7. Drainage basins and location of active streamflow-gaging stations within and near the study area.

Surface-Water Data 31
Peak-Flow Frequency Estimates

Peak-flow frequency estimates were determined 

for the continuous-record and crest-stage gaging stations that had 10 or more years of record and were published in Carter and Thompson (1999). Of the 15 gages 

included in this study, two did not have 10 years of 

record in 1996. Also, above-normal precipitation in 

1997 and 1998 may have caused significantly higher 

peaks than normal. For these reasons, updated peakflow frequency estimates were only determined for the 

eight currently operating continuous-record gaging 

stations. The estimates were determined using logPearson Type III procedures for recurrence intervals of 

2,5,10, 25, 50, 100, and 500 years; the results are presented in table 13. The historic peak flows for the eight 

stations are presented in Section C of the Supplemental 

Information section.

Summary Statistics

The information presented in this section 

includes tabular data and graphical representation for

the two continuous-record gages that had less than 

10 years of record in the previous data report (Carter 

and Thompson, 1999). Six tables and four graphs were 

produced for each of the two continuous-record gages 

for the period of record listed in table 13. The tables 

list monthly and annual mean flow, statistics on 

monthly and annual mean flow, correlation matrices, 

and lowest and highest mean flow and rankings. The 

graphs illustrate annual mean flow, distribution of 

monthly mean flow, duration curves, and duration 

hydrographs.

The summary statistics tables are presented in 

Section D of the Supplemental Information section. 

For each site, tables Dl.l and D2.1 contain monthly 

and annual mean flow values for the selected statistics 

period.

Tables D1.2 and D2.2 present selected statistics 

for monthly and annual mean flow. This table includes 

the total number of months used in the analysis, maximum, 75th percentile, 50th percentile, 25th percentile, 

minimum, mean, standard deviation, skewness, coefficient of variation, and the percent of annual flow.

Table 13. Peak-flow estimates for selected recurrence intervals for active gaging stations within and near the study area

Station 

number

05050000

05051650

05289985

05290000

05291000

05292000

06479215

06479438

Station name

Bois de Sioux River 

near White Rock

LaBelle Creek near 

Veblen

Big Coulee Creek 

near Peever

Little Minnesota 

River near Peever

Whetstone River near 

Big Stone City

Minnesota River at 

Ortonville, Minn.

Big Sioux River near 

Florence

Big Sioux River near 

Watertown

Period of 

analysis 

(water 

year)

1942-99

1988-99

1988-99

1940-81, 

1990-99

1931-99

1938-99

1984-99

1973-99

Peak flow, in cubic feet per second, for recurrence interval, in yeara, 

and annual exceedance probability, In percent

Years: 2 

Percent: 50

1,286

83

133.8

846.9

1,299

862.3

407.7

856.1

5 

20

3,438

298.5

380.3

2,163

3,289

1,760

1,114

2,235

10 

10

5,556

501.9

630.8

3,347

4,980

2,464

1,686

3,425

25 

4

9.038

789.5

1,051

5,127

7,369

3,437

2,429

5,120

50 

2

12,210

1,006

1,438

6,615

9,246

4,203

2,960

6,456

100

1

15.860

1,213

1,888

8,209

11,150

4,991

3,454

7,815

500 

0.2

26.250

1,636

3,180

12,240

15,560

6,887

4,441

10,960

32 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Tables D1.3 and D2.3 present the serial auto 

correlation matrix for the 1-year lag for monthly mean 

flow. The correlation coefficient is a measure of the 

strength of the linear relation between two variables 

(Ott, 1993). The correlation coefficient ranges from -1 

to +1; a correlation coefficient equal to zero indicates 

there is no relation between the two variables. A positive correlation indicates that both variables vary in the 

same direction, and a negative correlation indicates that 

one variable increases as the other decreases. The 

greater the correlation coefficient, the stronger the relation is between the two variables. For example, in table 

D1.3, the correlation coefficient for October of each 

year to October of the following year is 0.099. This 

indicates that streamflow in a given month is not 

strongly influenced by streamflow in the same month 

of the preceding year.

Tables D1.4 and D2.4 present a correlation 

matrix for monthly mean flow. This matrix contains a 

correlation coefficient for each month, relative to 

monthly flow for other months. For example, in table 

D1.4, the correlation coefficient between October and 

November is 0.596. This indicates that high (or low) 

streamflow in a given month is sometimes influenced 

by high (or low) streamflow in the previous month.

The lowest mean flow and ranking, by year, for 

1, 3, 7, 14, 30, 60, 90, 120, and 183 consecutive-day 

periods is presented in tables D1.5 and D2.5. Similarly 

the highest mean flow and ranking, by year, for 1, 3,7, 

15,30,60,90, 120, and 183 consecutive-day periods is 

presented in tables D1.6 and D2.6.

The graphical representations of the variations in 

the annual, monthly, and daily mean flow for each of 

the continuous-record gages that had less than a

10-year period of record in 1996 are presented in 

figures 8 and 9 with four graphs on each figure labeled 

A, B, C, and D as described previously. Graph A 

shows the annual mean flow values, and graph B shows 

a distribution of monthly mean flow. Graph C shows 

the duration curve for daily mean flows, and graph D 

shows the duration hydrographs for selected 

exceedances.

Lakes

Numerous lakes are present in the study area, 

and the majority of the lakes are located in the James 

and Big Sioux River Basins. Water-quality data from 

17 lakes were presented in Carter and Thompson 

(1999). Lake-level data collected during 1997-99 are 

presented in this section.

Water Levels

Lake-level data subsequent to 1996 are presented in tables in Section E of the Supplemental Information section. The locations of the lakes within the 

study area with available water-level data are shown in 

figure 10. Water levels from 1997-99 for 19 of these 

lakes are shown in figures 11-25. Measurements at 

Clubhouse Lake in Roberts County were discontinued 

after May 13, 1997, so no hydrograph is presented for 

this lake. The extremes listed are for the period of 

record. Cottonwood Lake in Roberts County is 

referred to as Cottonwood North Lake to avoid 

confusion with Cottonwood Lake in Marshall County.

Surface-Water Data 33
g

I

(a 

oSL

3

(a

1,000

A - ANNUAL MEAN FLOW

\L U! 10B 1 

o

0.01

III I I I I 1,000 r

100 -

10 r

B - DISTRIBUTION OF MONTHLY MEAN FLOW

0.1 -

0.01

: I I I I I I I I I I

: MAXIMUM

I 90TH PERCENTILE

i-J-i 75TH PERCENTILE

T 50TH PERCENTILE

U-l 25TH PERCENTILE

' 10TH PERCENTILE

O MINIMUM

;i

-

T

-

t

1 :

NOTE: values plotted as 0.01 may Include zero flow. :

-

1

T"

1

I i 1

' T

1

i i i

iT

*

-

|

--

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

ST ff

C - DURATION CURVE OF DAILY MEAN FLOW D - DURATION HYDROGRAPHS OF DAILY MEAN FLOW

100

10

1

0.1

nm

: II IF I I 1 1 I 1r: r * r

\

 .....-,. FLOW, IN 

SMC CUBIC FEET 

fc PER SECOND

95 0.0090 0.0075 0.0050 0.1825 1.10

10 5.48

5 12.4

:

-

:

-:-;

:

0.1 125 10 20 30 40 50 80 70 80 90 95 98 99 99.9

PERCENT OF TIME INDICATED VALUE WAS EQUALED OR EXCEEDED

1,000

100

10

0.1

001

\ I \ i r

EXCEEDANCE PERCENTILES

MAXIMUM

20 PERCENT

50 PERCENT80 PERCENTMINIMUM

1IIIIT^ 

NOTE: Values plotted as 0.01 may include zero flow

OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

Figure 8. Variations in annual, monthly, and daily mean flow for station 05051650, LaBelle Creek near Veblen, S. Dak., water years 1988-99.
HI

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LU 

LU

S O 01 X

S ff

O

S Q

LU

0 1 01 <

O

g LU 

CO

1? ^

5

« LU

s 3

0 *^

 * >

Q D

« LU

r~

° 0

o D

* 

LU

F

w LL

^ iLU

O

cc

LU

*: CL

UJ

00

CM

S

c .0

to

1_

0

5

c

CO

CD

_>>

'S

"°

c

CO

2>i

.C

H

o

E

"ffi

3 

c

c

CO

_c

CO

c

.0

CO c

CO

0)

QNO03S U3d 133d 01900 Nl 'MOld

8

QNO03S U3d 133d 01900 Nl 'MOld

I

O)

il

Surface-Water Data 35
46°00

R.55W. (!

'j Sargent Co

\ Marshal! Co

T. 130N. 

97°15'

RichiandCo ___ North Dakota

~| Roberts-Co ' South Dakota

R.54W.

\ BlueDogl 

__L<J*e ^Lake

W^ I Ortley ...

\ Q I D . I \

.!/Summit''"/ D _.,.,.

_LR£?e^£2_ --0^1- - -° V 

V" V" ""/Irate An*rtM ^^^i^"

\ ^Lah!

\t

Base from U.S. Geological Survey 

digital line graph 1:24,000

T. 121 N.

Grain Caj T. 120N. 

Codingtpn Co

R. 51 W.

T. 119N

T. 118N.

_96°30P

 ^A T. 122 N.

R.49W. R.48W. R.47W.

0 2 4 6 8 10 MILES li'irhi'ih'i ' ' ' '

0 2 4 6 8 10 KILOMETERS

Figure 10. Location of lakes with recorded water-level elevations. 

36 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Lake name: Bitter Lake 

County: Day

Extremes: June 8, 1984, to November 2, 1999: Highest, 1,792.15 feet, November 2, 1999; lowest, 1,770.3 feet, 

June 8, 1984.

i_ 

UJ

JFMAMJJASOND

1,786

JFMAMJJASOND 

1997 1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 11 . Hydrograph for Bitter Lake in Day County.

Lake name: Blue Dog Lake 

County: Day

Extremes: February 21, 1980, to November 2, 1999: Highest, 1,804.29 feet, June 10, 1999; lowest, 1,799.5 feet, 

November 4, 1980, September 21, 1988.

i_ 

LJ

1,806

Z Qj L804

S M 1-802

^ > DC ^

m 

<

1,798

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 12. Hydrograph for Blue Dog Lake in Day County.

Surface-Water Data 37
Lake name: Buffalo Lakes

County: Marshall

Extremes (North Buffalo Lake): June 24, 1982. to September 28, 1999: Highest, 1,837.7 feet, May 19, 1997;

lowest, 1,830.3 feet, October 12, 1983. 

Extremes (South Buffalo Lake): June 23, 1982, to September 28, 1999: Highest, 1,838.6 feet, May 19, 1997;

lowest, 1,830.7 feet, October 12, 1983.

1,840

JFMAMJJASOND

1,834

JFMAMJJASOND 

1997 1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 13. Hydrograph for Buffalo Lakes in Marshall County.

Lake name: Clear Lake

County: Marshall : 

Extremes: May 12,1982, to September 28, 1999: Highest, 1,822.9 feet, May 5, 1994, and May 19,1997; lowest, 

1,816.4 feet, October 9, 1985.

1,823

UJ _, 

LL LU

U$

 ^

< <

1,821

JFMAMJJASOND 

1997

I I I I I I I I I I I

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 14. Hydrograph for Clear Lake in Marshall County.

38 Hydrologlc and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Lake name: Clubhouse Lake 

County: Roberts

Extremes: July 10, 1986, to May 13, 1997: Highest, 973.1 feet, May 5, 1994; lowest, 969.5 feet, September 20, 

1988. (Note: Measurements have been discontinued at this lake.)

Lake name: Cottonwood (North) Lake 

County: Roberts

Extremes: July 10, 1986, to September 28, 1999: Highest, 1,030.6 feet, May 13, 1999; lowest, 1,028.3 feet, 

September 20, 1988.

1,031

JFMAMJJASOND JFMAMJJASOND

1997 1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 15. Hydrograph for Cottonwood Lake (North) in Roberts County.

Lake name: Cottonwood Lake 

County: Marshall

Extremes: October 3, 1995, to September 28, 1999: Highest, 1,827.7 feet, May 19, 1997; lowest, 1,826.3 feet, 

October 7, 1997.

1,828

JFMAMJJASOND

1,826

JFMAMJJASOND 

1997 1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 16. Hydrograph for Cottonwood Lake in Marshall County.

Surface-Water Data 39
Lake name: Drywood Lakes

County: Roberts

Extremes (Drywood Lake North): November 3,1983, to September 28,1999: Highest, 1,950.0 feet, May 4,1999;

lowest, 1,940.9 feet, September 20, 1990. 

Extremes (Drywood Lake South): November 3,1983, to September 28,1999: Highest, 1,950.0 feet, May 4,1999;

lowest, 1,942.0 feet, May 3, 1990.

LJ

Ul

1 8 I"

1 ,952

1,950

1,946

(Lakes have coalesced into one body of water.)

i i i i i i i i i i i

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 17. Hydrograph for North and South Drywood Lakes in Roberts County.

Lake name: Enemy Swim Lake 

County: Day

Extremes: July 7, 1982, to November 2, 1999: Highest, 1,856.3 feet, April 15, 1997; lowest, 1,850.2 feet, 

October 12, 1983.

B--

z i3

35

1,858

1,856

1 ' 854

1,852

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 18. Hydrograph for Enemy Swim Lake in Day County.

40 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Lake name: Hillebrands Lake 

County: Day

Extremes: October 11, 1983, to November 2, 1999: Highest, 1,804.03 feet, July 26, 1999; lowest, 1,781.3 feet, 

October 11, 1983.

1,810

LLJ

> CO 1,800

"

1,790

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 19. Hydrograph for Hillebrands Lake in Day County.

Lake name: Hurricane Lake 

County: Roberts

Extremes: July 10,1986, to September 28,1999: Highest, 1,753.7 feet, May 10, 1995; lowest, 1,746.9 feet, May 1, 

1991.

1,752 I I I I I I I I I I I | I I I I I I I I I I I | I I I I I I I I I T

> CO L751 

_j iiI 

>

1,750

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 20. Hydrograph for Hurricane Lake in Roberts County.

Surface-Water Data 41
Lake name: Pickerel Lake 

County: Day

Extremes: June 22, 1982, to November 2, 1999: Highest, 1,846.7 feet, October 8, 1997; lowest, 1,843.5 feet, 

September 21, 1988.

1,848

A/:

1,844

JFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1997 1998 1999

CALENDAR YEARS

Figure 21. Hydrograph for Pickerel Lake in Day County.

Lake name: Piyas Lake 

County: Marshall

Extremes: October 4, 1995, to September 28. 1999: Highest, 1,832.6 feet, September 28,1999; lowest, 

1,828.0 feet, October 4, 1995.

1,834

SuS

z 2i 

J<

W LJ 

ft W

1,830

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 22. Hydrograph for Piyas Lake in Marshall County.

42 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Travarse Reservation/Roberts County Investigation
Lake name: Red Iron Lakes

County: Marshall

Extremes (Red Iron Lake North): September 28, 1984, to September 28, 1999: Highest, 1,830.6 feet, May 19,

1997, May 11, 1995; lowest, 1,825.0 feet, September 28, 1984. 

Extremes (Red Iron Lake South): September 28, 1994, to September 28, 1999: Highest, 1,832.9 feet, May 19,

1997, May 11, 1995; lowest, 1,826.8 feet, October 9, 1985, September 20, 1988.

Hi

JFMAMJJASOND

1,828

JFMAMJJASOND 

1997 1998

CALENDAR YEARS

JFMAMJJASOND 

1999

Figure 23. Hydrograph for North and South Red Iron Lakes in Marshall County.

Lake name: Spring Lake 

County: Day

Extremes: October 11, 1983, to October 2, 1999: Highest, 1,804.03 feet, July 26, 1999; lowest, 1,785.0 feet, 

October 11, 1983.

1,805

UJ

> W 1.800 

Ij LJ

1,795

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEARS

JFMAMJJASOND 

1999

Figure 24. Hydrograph for Spring Lake in Day County.

Surface-Water Data 43
Lake name: Whitestone Lakes

County: Roberts

Extremes (Whitestone Lake North): June 7, 1984, to September 28, 1999: Highest, 2,015.3 feet, May 5, 1998;

lowest, 2,010.4 feet, September 20, 1990. 

Extremes (Whitestone Lake South): June 7, 1984, to September 28, 1999: Highest, 2,015.3 feet, May 5, 1998;

lowest, 2,009.0 feet, September 17, 1992.

>

1 <

2,016 I I I I T

2,014

2,012

I I I I l l l l l l l l l l | l l l l l l l l i l r 

(Lakes separated in the fall of 1997, then coalesced in 1998)

North Whitestone Lake

JFMAMJJASOND 

1997

JFMAMJJASOND 

1998

CALENDAR YEAR

JFMAMJJASOND 

1999

Figure 25. Hydrograph for North and South Whitestone Lakes in Roberts County.

44 Hydrologlc and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Flows at Inlets/Outlets

Miscellaneous flow measurements have been 

made by the USGS on inlets and outlets of some of the 

lakes within the Waubay Lakes Chain (fig. 26). Beginning in the 1990's, the lakes began to rise and coalesce. 

Three of the four flow measurement sites are within the

study area. The fourth measurement site is outside the 

study area, but because of how the lakes have risen and 

coalesced, parts of the upstream (Rush) and downstream (Bitter) lakes are within the study area. 

Table 14 summarizes the streamflow measurements 

and associated data at the four lake inlet/outlet 

locations.

Table 14. Miscellaneous streamflow measurements at lake inlets or outlets

[ft /s, cubic feet per second; deg C, degrees Celsius; (J,S/cm, microsiemens per centimeter; , no data]

Station

453014097165900 

Pickerel Lake outfow near 

Grenville, SD

452357097165200 

Campbell Slough outflow near 

Waubay, SD

06479159 

Blue Dog Lake inflow (Owens 

Creek) near Waubay, SD

451918097193700 

Little Rush Lake outflow near 

Waubay, SD

Date

11-16-98 

07-29-99

08-11-99

08-25-99

09-08-99

09-22-99

11-16-98 

07-29-99

08-11-99

08-25-99

09-08-99

09-22-99

07-29-99 

08-11-99

08-25 99

09-08-99

09-22-99

07-21-99 

07-29-99

08-11-99

08-25-99

09-08-99

09-22-99

Time

1255 

1300

1605

1600

1630

1415

1135 

1150

1425

1415

1510

1215

1040 

1100

1250

1355

1140

1340 

1505

1040

1040

1210

1030

Discharge, 

instantaneous 

(ft3/s)

11 

10

3.2

3.2

16

9.4

11 

7.9

3.2

.33

5.7

.02

5.8 

4.7

3.9

15

6.7

67 

52

44

46

45

39

Water 

temperature 

(degC)

2.0 

27.5

24.0

25.5

18.5

16.0

.5 

27.0

27.0

24.0

18.5

-

25.0 

22.0

23.0

15.5

12.0

25.0 

30.0

22.5

22.0

18.0

L5.0

Air 

temperature 

(deg C)

3.0 

30.0

27.0

26.0

15.5

20.0

3.0 

29.5

31.0

26.0

19.0

-

28.0 

25.0

24.0

14.5

19.0

28.0 

36.0

25.0

22.0

15.0

14.0

Specific 

conductance 

(US/cm)

452 

445

451

440

442

447

429

402

330

397

380

-

566 

538

546

552

542

448 

430

463

515

500

559

Surface-Water Data 45
T.I SON.

'while"!* T 

Bock !?£ ' 129N.

T. 128N.

_J7°00'

~7~ 

North Dakota

Roberts Co , South Dakota -^v. ,

1____ Inditmi_ - f- r/i./i.vjmAM 1

45°30' ^ ,,^H53bjl 4097165900

\ IA- il i** _' _

^^452357097165200 ^^

451918(39193700 R49W R.48W. R-47W.

. xrfc^1 -^ S&

GrantCo/ T. 120 N. 

Coatngtorj Co

, --,T ,?* i--4-«o^ R.

96°30'

T. 122 N.

0 2 4 6 8 10 MILES h'n'i'n'ih'i ' ' ' '

0 2 4 6 8 10 KILOMETERS

EXPLANATION

A STREAMFLOW GAGING STATION06479159 Number is station identification

T. 118N.

Base from U.S. Geological Survey v 

digital line graph 1:24,000 R. 52 W.

Figure 26. Location of miscellaneous streamflow measurements at lake inlets or outlets.

46 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
REFERENCES

Armstrong, C.A., 1979, Ground-water basic data for 

Ransom and Sargent Counties, North Dakota, 

Part II North Dakota Geological Survey Bulletin 69 

and North Dakota State Water Commission County 

Ground Water Studies 31,637 p.

 1982, Ground-water resources of Ransom and 

Sargent Counties, North Dakota, Part III North 

Dakota Geological Survey Bulletin 69 and North 

Dakota State Water Commission County Ground Water 

Studies 31,51 p.

Baker, C.H., Jr., 1966, Geology and ground water resources 

of Richland County, North Dakota, Part II North 

Dakota Geological Survey Bulletin 46 and North 

Dakota State Water Commission County Ground Water 

Studies?, 170 p.

Baker, C.H., Jr., and Paulson, Q.F., 1967, Geology and 

ground water resources of Richland County, North 

Dakota, Part III North Dakota Geological Survey 

Bulletin 46 and North Dakota State Water Commission 

County Ground Water Studies 7, 48 p.

Carter, J.M., and Thompson, R.F., 1999, Selected hydrologic 

data through 1996 for the Lake Traverse Reservation/ 

Roberts County water-resources investigation in South 

Dakota: U.S. Geological Survey Open-File Report 

98-647, 243 p.

Flint, R.F., 1955, Pleistocene geology of eastern South 

Dakota: U.S. Geological Survey Professional 

Paper 262, 173 p.

Friedman, L.C., andErdmann, D.E., 1982, Quality assurance 

practices for the chemical and biological analyses of 

water and fluvial sediments: U.S. Geological Survey 

Techniques of Water-Resources Investigations, book 5, 

chap. A6, 181 p.

Hansen, D.S., 1990, Water resources of Codington and Grant 

Counties, South Dakota: U.S. Geological Survey 

Water-Resources Investigations Report 89-4147, 47 p.

Horowitz, A.J., Demas, C.R., Fitzgerald, K.K., Miller, T.L., 

Rickert, D.A., 1994, U.S. Geological Survey protocol 

for the collection and processing of surface-water 

samples for the subsequent determination of inorganic 

constituents in filtered water: U.S. Geological Survey 

Open-File Report 94-539,57 p.

Koch, N.C., 1975, Geology and water resources of Marshall 

County, South Dakota Part I Geology and water 

resources: South Dakota Geological Survey 

Bulletin 23, 76 p.

Leap, D.I., 1988, Geology and hydrology of Day County, 

South Dakota: South Dakota Geological Survey 

Bulletin 24, 117 p.

Ott, L.O., 1993, An introduction to statistical methods 

(4th ed.): Belmont, Calif., Wadsworth, Inc., 1,051 p.

Pritt, J.W, and Raese, J.W, eds., 1992, Quality assurance/ 

quality control manual National Water Quality 

Laboratory: U.S. Geological Survey Open-File Report 

92-495, 33 p.

Wood, W.W., 1976, Guidelines for collection and field analysis of ground-water samples for selected unstable constituents: U.S. Geological Survey Techniques of WaterResources Investigations, book 1, chap. D2, 24 p.

References 47

SUPPLEMENTAL INFORMATION

Section A - Geologic logs

Test Holes Drilled and Observation Wells Installed, 1997-99

Local number: 122N47W21AAAD

Other identifier: R2-98-13

Site identification number: 452218096331801

Date of construction: 06-15-98

Land surface altitude: 990 feet

Total depth: 122 feet

Depth

0-1

1-10

10-20

20-25

25-32

32-84

84-117

117-122

Thickness 

(feet)

1

9

10

5

7

52

33

5

Altitude 

(feet)

990-989

989-980

980-970

970-965

965-958

958-906

906-873

873-868

Description

Clay, black, silty; some sand, top few inches roadfill (topsoil)

Clay, tan to yellowish-brown, silty, sandy, pebbly; some light-gray mottling, oxidized 

(till)

Clay, dark-grayish-black, very shaley, silty, pebbly; unoxidized (till)

Sand, grayish-brown, medium to coarse

Clay, gray, silty, sandy, pebbly; unoxidzed (till)

Clay, dark-gray, shaley; hard, greasy (Blue Hill Shale Member - Carlile Shale)

Clay, dark-grayish-brown; some white specks, calcareous (Fairport Shale Member - 

Carlile Shale)

Siltstone, brown with some white; hard, cherty, very calcareous (Greenhorn Limestone)

Electric log available

Local number: 122N48WIDDDA

Other identifier: R2-98-19

Site identification number: 452400096370401

Date of construction: 06-23-98

Land surface altitude: 1,000 feet

Total depth: 82 feet

Depth

0-2

2-10

10-16

16-28

28-31

31-42

42-82

Thicknees 

(feet)

2

8

6

12

3

11

40

Altitude 

(feet)

1,000-998

998-990

990-984

984-972

972-969

969-958

958-918

Description

Clay, yellowish-brown, silty, sandy; oxidized, many cobbles (topsoil)

Gravel, medium to coarse; highly oxidized

Clay, brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized, sand lens from 22 to 24 feet (till)

Sand, gray, fine to medium

Clay, gray, silty, sandy, pebbly; harder than till interval above, unoxidized

Clay, dark-gray, shaley; hard, greasy (Carlile Shale)

(till)

Electric log available

Section A - Geologic Logs 53
Local number: 122N48W6BBBA

Other identifier: R2-98-18

Site identification number: 452448096441701

Date of construction: 06-22-98

Land surface altitude: 1,153 feet

Total depth: 402 feet

Depth

0-12

12-19

19-20

20-27

27-53

53-58

58-100

100-108

108-114

114-136

136-268

268-342

342-367

367-402

Thickness 

(feet)

12

7

1

7

26

5

42

8

6

22

132

74

25

35

Altitude 

(feet)

1,153-1.141

1,141-1,134

1,134-1,133

1,133-1,126

1,126-1,100

1,100-1,095

1,095-1,053

1,053-1,045

1,045-1,039

1,039-1,017

1.017-885

885-811

811-786

786-751

Description

Clay, tan to yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, unoxidized (till)

Clay, tan, silty; oxidized

Gravel, medium; some coarse, highly oxidized

Clay, gray, silty, sandy, pebbly; soft, drills fast, unoxidized (till)

Sand and gravel, coarse sand to fine gravel

Clay, dark-gray, silty, sandy, pebbly; harder than till interval above, unoxidized (till)

Sand, gray, medium to coarse

Clay, reddish-pink, silty, sandy, pebbly; oxidized (Hawk Creek Till)

Clay, dark-gray, silty, sandy, pebbly; hard, some silty, very calcareous clay, possibly 

Niobrara Formation inclusions, unoxidized (till)

Clay, dark-gray, shaley: hard, greasy, concretion at 194 feet, sandy zones from 249 to 

255 feet and 263 to 268 feet (Blue Hill Shale Member - Carlile Shale)

Clay, dark-brownish-gray, shaley; gritty, hard, calcareous, few white specks (Fairport 

Shale Member - Carlile Shale)

Clay, brown with white layers; hard, some siltstone, some chert, very calcareous 

(Greenhorn Limestone) |

Clay, dark-gray, shaley; hard, greasy, slightly calcareous (Graneros Shale)

Electric log available

54 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N48W10BABB

Other identifier: R2-98-20

Site identification number: 452352096402301

Date of construction: 6-23-98

Land surface altitude: 1,090 feet

Total depth: 142 feet

Depth

0-2

2-20

20-35

35-42

42-52

52-70

70-75

75-83

83-92

92-102

102-113

113-142

Thickness 

(feet)

2

18

15

7

10

18

5

8

9

10

11

29

Altitude . 

(feet) Descr,pt,on

1 ,090- 1 ,088 Clay, black, silty (topsoil)

1,088-1,070 Clay, tan to yellowish-brown, silty, sandy, pebbly; oxidized (till)

1 ,070- 1 .055 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,055-1,048 Sand and gravel, coarse sand to fine gravel; many shale pebbles

1,048-1,038 Clay, gray, very silty; poor cuttings (lake sediment?)

1,038-1,020 Sand and gravel, brown, coarse sand to fine gravel, silty; some clay

1,020-1,015 Clay, gray, very silty; poor cuttings (lake sediment?)

1,015-1,007 Sand, fine to medium, silty; some clay

1,007-998 Clay, grayish-pink, silty, sandy, pebbly; oxidized (Hawk Creek Till)

998-988 Sand and gravel, coarse sand to fine gravel

988-977 Clay, gray, very silty, sandy, pebbly; unoxidized (till)

977-948 Clay, gray, shaley; hard, greasy (Carlile Shale)

Electric log available

Section A - Geologic Logs 55
Local number: 122N48W13DDDD

Other identifier: R2-98-14

Site identification number: 452211096365901

Date of construction: 6-16-98

Land surface altitude: 1,086 feet

Total depth: 270 feet

Depth

0-19

19-35

35-39

39-45

45-51

51-56

56-84

84-88

88-102

102-137

137-192

192-268

Thickness 

(feet)

19

16

4

6

6

5

28

4

14

35

55

76

Altitude 

(feet)

1,086-1,067

1,067-1,051

1,051-1,047

1,047-1,041

1,041-1,035

1,035-1,030

1,030-1,002

1,002-998

998-984

984-949

949-894

894-818

Description

Clay, yellowish-brown, silty, sandy, pebbly; hard, oxidized, turns dark brown with depth 

(till)

Clay- gray, silty, sandy, pebbly; unoxidized (till)

Sand, brown, medium to coarse

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, medium to coarse; some fine gravel

Clay, gray, silty, sandy, pebbly; unoxidized, darker than till intervals above (till)

Clay, reddish-brown, silty, very sandy, pebbly; hard, oxidized, turning grayish-pink with 

depth (Hawk Creek Till)

Clay, gray, silty; unoxidized (lake sediment)

Sand and gravel, medium to coarse sand to fine to medium gravel; various rock types, 

many shale pebbles

Clay, gray to dark-gray, silty, sandy, pebbly; unoxidized (till)

Clay, dark-gray, shaley; hard, greasy (Blue Hill Shale Member - Carlile Shale)

Clay, dark-brownish-gray; gritty, some white specks, calcareous (Fairport Shale

268-270

Electric log available

Member - Carlile Shale)

818 816 Siltstone. brown; with white clay beds, some chert, very calcareous (Greenhorn 

Limestone)

56 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N48W13DDDD2

Other identifier: R2-98-15

Site identification number: 452211096365902

Date of construction: 06-16-98

Land surface altitude: 1,086 feet

Total depth: 102 feet

Depth

0-18

18-36

36-42

42-57

57-60

60-84

84-100

100-102

Thickness 

(feet)

18

18

6

15

3

24

16

2

«* ___*».

1,086-1,068 Clay, yellowish-brown, silty, sandy, pebbly; hard, oxidized, turns dark-brown with 

depth (till)

1,068-1,050 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1 ,050- 1 ,044 Sand, brown, medium to coarse

1,044-1,029 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,029-1,026 Sand, reddish-brown, medium

1,026-1,002 Clay, reddish-pink, silty, very sandy, pebbly; oxidized (Hawk Creek Till)

1,002-986 Sand and gravel, medium to coarse sand to fine to medium gravel

986-984 Clay, gray, silty, sandy, pebbly; unoxidized (till)

Well screened from 90 to 100 feet; 2-inch PVC screen and casing

Section A - Geologic Logs 57
Local number: 122N48W16DDDC

Other identifier: R2-98-16

Site identification number: 452210096404701

Date of construction: 06-17-98

Land surface altitude: 1,118 feet

Total depth: 162 feet

Depth

0-1

1-30

30-33

33-35

35-49

49-76

76-80

80-83

83-85

85-98

98-106

106-130

130-133

133-162

Thickness 

(feet)

1

29

3

2

14

27

14

3

2

13

8

24

3

30

Altitude 

(feet)

1,118-1,117

1,117-1,088

1,088-1,085

1,085-1,083

1,083-1,069

1,069-1,042

1,042-1.038

1,038-1,035

1,035-1,033

1,033-1,020

1,020-1,012

1,012-988

988-985

985-956

Description

Clay, black, silty (topsoi)

Clay, tan to yellowish-brown, silty, sandy, pebbly; oxidized, turns dark brown with 

depth (till)

Sand and gravel, coarse sand to fine gravel; some cobbles near base of interval

Clay, brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized, E-log signature differs from above interval 

(till)

Sand, gray, fine to medium

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, fine to medium

Clay, brown, silty, sandy, pebbly; oxidized, rocks at 93, and 96 to 98 feet (till)

Clay, gray, shaley; hard, greasy, unoxidized (shale inclusion)

Clay, dark-gray, silty, sandy, pebbly; unoxidized, hard, shaley (till)

Sand and gravel, coarse sand to fine gravel

Clay, dark-gray, shaley; hard, greasy, noncalcareous (Blue Hill Shale Member - Carlile 

Shale)

Electric log available

58 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N49W16DDDC

Other identifier: R2-97-47

Site identification number: 452212096480801

Date of construction: 08-27-97

Land surface altitude: 1,165 feet

Total depth: 182 feet

Depth

0-2

2-12

12-26

26-55

55-60

60-65

65-78

78-148

148-150

150-182

Thickness 

(feet)

2

10

14

29

5

5

13

70

2

32

Altitude 

(feet)

1,165-1,163

1,163-1,153

1,153-1.139

1,139-1,110

1,110-1,105

1,105-1,100

1,100-1,087

1,087-1,017

1,017-1,015

1,015 983

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, dark-gray, silty, sandy, pebbly; some shale inclusions, unoxidized (till)

Sand, gray, fine to medium; grading to fine to medium gravel, contains abundant black 

shale pebbles

Clay, gray, silty, sandy (till?)

Sand and gravel

Clay, light-gray, shaley; hard, greasy (Pierre Shale)

Clay, dark-gray, shaley; hard, greasy

Claystone; very hard, no sample (Niobrara Formation?)

Clay, dark-gray, shaley; hard, greasy (Carlile Shale)

Electric log available

Section A - Geologic Logs 59
Local number: 122N49W24DAAA

Other identifier: R2-98-17

Site identification number: 452144096442301

Date of construction: 06-17-98

Land surface altitude: 1,130 feet

Total depth: 142 feet

Depth

0-2

2-15

15-24

24-29

29-41

41-50

50-62

62-142

Thickness 

(feet)

2

13

9

5

12

9

12

80

Altitude 

(feet)

1,130-1,128

1,128-1,115

1,115-1,106

1,106-1,101

1,101-1,089

1,089-1,080

1,080-1,068

1.068-988

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, dark-gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine gravel

Clay, reddish-brown to reddish-gray, silty, sandy, pebbly; oxidized (Hawk Creek Till)

Sand, brown, medium to coarse

Clay, dark-gray to black, shaley; some light-gray bentonite layers (Sharon Springs 

Member - Pierre Shale)

Clay, light-gray to gray, shaley; greasy, noncalcareous (Carlile Shale)

Electric log available

Local number: 122N50W13DDDC

Other identifier: R2-97-46

Site identification number: 452210096514701

Date of construction: 08-26-97

Land surface altitude: 1,224.6 feet

Total depth: 82 feet

Depth

0-1

1-13

13-18

18-30

30-82

Thickness 

(feet)

1

12

5

12

52

Altitude 

(feet)

1,224.6-1,223.6

1,223.6-1,211.6

1,211.6-1,206.6

1,206.6-1,194.6

1,194.6-1,142.6

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand, brown, coarse; some gravel

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 17 feet (till)

Sand and gravel, coarse sand to fine gravel; some coarse gravel with depth

Well screened from 54 to 74 feet; 2-inch PVC casing and screen used. For electric-log see R2-94-62

60 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N50W17CCCC

Other identifier: R2-98-25

Site identification number: 452213096575001

Date of construction: 06-30-98

Land surface altitude: 1,475 feet

Total depth: 202 feet

Depth

0-8

8-13

13-36

36-58

58-60

60-91

91-100

100-118

118-126

126-130

130-202

Thickness 

(feet)

8

5

8

22

2

31

9

18

8

4

72

Altitude . . 

(feet) Descr,pt,on

1,475-1.467 Gravel, medium to very coarse: some large boulders, some coarse sand

1,467-1,462 Clay, brown, silty, sandy, pebbly; oxidized (till)

1,462-1,439 Clay, gray, silty, sandy, pebbly; soft, unoxidized, rock from 28 to 30 feet (till)

1,439-1,417 Gravel, fine to medium

1,417-1,415 Clay, dark-brown, silty, sandy; some pebbles (soil horizon)

1,415-1,384 Clay, light-gray, silty, sandy, pebbly; unoxidized, sand lens from 72 to 75 feet, 77 to 

79 feet, and 89 to 91 feet (till)

1,384-1,375 Clay, gray, shaley; greasy (shale inclusion)

1,375-1,357 Clay, gray, silty, sandy, pebbly; unoxidized, rocks from 100 to 101 feet, gravel lens from 

105 to 108 feet (till)

1,357-1,349 Clay, dark-gray, shaley; hard, greasy, noncalcareous (shale inclusion)

1,349-1,345 Sand and gravel, coarse sand to fine to medium gravel

1,345-1273 Clay, dark-gray, shaley; hard, greasy, noncalcareous (Pierre Shale? or till?)

Electric log available

Section A - Geologic Logs 61
Local number: 122N50W17DDDC

Other identifier: R2-99-14

Site identification number: 452213096564601

Date of construction: 08-30-99

Land surface altitude: 1,390 feet

Total depth: 364 feet

Depth

0-1

1-2

2-10

10-52

52-54

54-63

63-68

68-70

70-74

74-210

210-300

300-344

344-356

356-364

Electric log

Thickness 

(feet)

1

1

8

42

2

9

5

2

4

136

90

44

12

8

available

Altitude 

(feet)

1,390-1,389

1,389-1,388

1,388-1,380

1,380-1,338

1,338-1,336

1,336-1,327

1,327-1,322

1,322-1,320

1,320-1,316

1,316-1,180

1,180-1.090

1,090-1,046

1,046-1,034

1,034-1,026

Description

Clay, black, silty (topsoil)

Gravel, brown coarse; some sand, rock at 2 feet, oxidized

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, very silty, sandy, pebbly; soft, greasy, unoxidized (till)

Sand, fine to medium

Clay, dark-gray, very silty; hard, calcareous (lake sediment)

Sand, fine to medium

Clay, gray; hard (lake sediment)

Gravel, fine

Clay, gray, silty, sandy, pebbly, very shaley; gravel lens from 82 to 84 feet, rock at 

158 feet, E-log change at 113 feet, unoxidized (till)

Clay. gray, silty, sandy, pebbly; less shaley than above interval, many shale inclusions, 

unoxidized (till)

Sand, fine; hard, cemented, rig chatter, clay layer at 327 feet

Clay, light-gray, silty; gritty, very calcareous (Niobrara Formation)

Clay, gray, shaley; soft, greasy, noncalcareous, concretion at 363 feet (Carlile Shale)

62 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N51W4DDDD R

Other identifier: R2-98-32

Site identification number: 452210097023101

Date of construction: 08-10-98

Land surface altitude: 1,960 feet

Total depth: 862 feet

Depth

0-10

10-22

22-50

50-65

65-69

69-72

72-77

77-92

92-98

98-110

110-162

162-196

196-204

204-244

244-256

256-358

358-422

422-454

454-506

506-513

513-842

842-862

Thickness 

(feet)

10

12

18

15

4

3

5

15

6

12

52

34

8

40

12

102

64

32

12

7

329

20

Altitude 

(feet)

1,960-1,950

1,950-1,938

1,938-1,910

1,910-1,895

1,895-1,891

1,891-1,888

1,888-1,883

1,883-1,868

1,868-1,862

1,862-1,850

1,850-1,798

1,798-1,764

1,764-1,756

1,756-1,716

1,716-1,704

1,704-1,602

1,602-1,538

1,538-1.506

1,506-1,454

1,454-1,447

1,447-1,118

1,118-1.098

Description

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand and gravel, oxidized

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine gravel; some coarse gravel, some clay layers

Clay, tan, very silty; greasy (loess)

Clay, grayish-brown to black, very silty; greasy (loess)

Clay, yellowish-brown, silty, very sandy, pebbly; highly oxidized (till)

Clay, grayish-brown, silty, sandy, pebbly; rocks at 86, 89, and 90 feet, sand lens from 82 

to 86 feet, partially oxidized (till)

Sand and gravel, coarse sand to fine gravel

Clay, gray, very silty; soft, unoxidized, some sand layers (lake sediment)

Clay, gray, silty, sandy, pebbly; rocks from 146 to 148 feet and from 161 to 162 feet, 

unoxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly, cobbly; oxidized, very cobbly from 162 to 

178 feet, rocks at 175 to 187 feet (till)

Clay, grayish-brown, silty, sandy, pebbly, greasy, partially oxidized (till)

Clay, dark-gray, silty, sandy, pebbly; some hints of oxidation, greasy (till)

Sand, coarse; cemented, rig chatter, poor sample

Clay, gray, silty, sandy, pebbly; many cobbles from 282 to 296 feet, gravel lens from 

351 to 354 feet and 356 to 358 feet (till)

Clay, light-gray with some greenish-brown and gray, silty, sandy, pebbly, shaley; 

oxidized and unoxidized zones, rocks at 397 and 406 feet, many shale inclusions (till)

Sand and gravel, coarse sand to fine gravel; drills fast, rig chatter, cemented

Clay, gray, silty, sandy, pebbly, shaley; greasy, with shale inclusions, rocks at 472. 492, 

and 504 feet, unoxidized (till)

Clay, dark-gray, shaley; greasy (shale block)

Clay, gray, silty, sandy, pebbly, shaley; greasy, with shale inclusions, rocks at 617, 759, 

765, and 767 feet, unoxidized, very poor cuttings (till)

Clay, dark-gray to black, shaley; very hard, greasy, very poor cuttings (Pierre Shale? or 

till?)

Electric log available

Section A - Geologic Logs 63
Local number: 122N51W4DDDD2R

Other identifier: R2-99-11

Site identification number: 452212097022702

Date of construction: 08-17-99

Land surface altitude: 1,962.2 feet

Total depth: 452 feet

Depth

0-11

11-22

22-53

53-65

65-69

69-72

72-77

77-93

93-98

98-110

110-164

164-196

196-204

204-242

242-255

255-349

349-353

353-419

419-451

451-452

Thickness 

(feet)

11

11

31

12

4

3

5

26

5

12

54

32

8

38

13

16

4

66

32

1

Altitude _. (feet) Description

1,962.2-1,951.2 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,951.2-1,940.2 Sand and gravel; oxidized

1,940.2-1,909.2 Clay, gray, silty, sandy, pebbly; rocks at 32, 41, and 46 feet, unoxidized (till)

1,909.2-1,897.2 Sand and gravel, coarse sand to fine gravel; some coarse gravel, some clay layers

1 ,897.2-1 ,893.2 Clay, tan, very silty; greasy (loess)

1,893.2-1,890.2 Clay, grayish-brown to black, very silty; greasy (loess)

1,890.2-1,885.2 Clay, yellowish-brown, silty, very sandy, pebbly; highly oxidized (till)

1,885.2-1,869.2 Clay, grayish-brown, silty, sandy, pebbly; rocks at 86, 89, and 90 feet, sand lens from 82 

to 86 feet, partially oxidized (till)

1,869.2-1,864.2 Sand and gravel, coarse sand to fine gravel

1,864.2-1,852.2 Clay, gray, very silty; soft, unoxidized, some sand layers (lake sediment)

1,852.2-1,798.2 Clay, gray, silty, sandy, pebbly; rocks from 146 to 148 feet and from 161 to 162 feet, 

unoxidized (till)

1,798.2-1,766.2 Clay, yellowish-brown, silty, sandy, pebbly, cobbly; oxidized, very cobbly from 162 to 

178 feet, rocks at 175 and 187 feet (till)

1,766.2-1,758.2 Clay, grayish-brown, silty, sandy, pebbly; greasy, partially oxidized (till)

1,758.2-1,720.2 Clay, dark-gray, silty, sandy, pebbly; some hints of oxidation, greasy (till)

1 ,720.2- 1 ,707.2 Sand, coarse; cemented, rig chatter, poor sample

1,707.2-1,613.2 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,613.2-1,609.2 Sand; hard, cemented

1,609.2-1,543.2 Clay, dark-gray, silty, sandy, pebbly, shaley; unoxidized, many shale inclusions (till)

1 ,543.2- 1 ,5 1 1 .2 Sand and gravel, coarse sand to fine gravel: drills fast, rig chatter, cemented

1,511.2-1,510.2 Clay, gray, silty, sandy, pebbly, shaley; greasy, with shale inclusions (till)

Well screened from 426.5 to 446.5 feet; 2-inch screen and PVC casing

64 Hydro-logic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N51W27BBBB R

Other identifier: R2-98-26

Site identification number: 451936097022601

Date of construction: 07-14-98

Land surface altitude: 2,025 feet

Total depth: 627 feet

Depth

0-2

2-8

8-11

11-41

41-70

70-80

80-159

159-162

162-243

243-278

278-298

298-426

426-470

470-496

496-528

528-627

Thickness 

(feet)

2

6

3

30

29

10

79

3

81

35

20

128

44

26

32

99

Electric log available; below 298

Altitude 

(feet)

2,025-2,023

2,023-2,017

2,017-2,014

2,014-1,984

1,984-1,955

1,955-1,945

1,945-1,866

1,866-1,863

1,863-1,782

1,782-1,747

1,747-1,727

1,727-1,599

1,599-1,555

1,555-1,529

1,529-1,497

1,497-1,398

Description

Clay, black, silty (topsoil)

Clay, brown, silty, sandy, pebbly; oxidized (till)

Sand and gravel, cobbly

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Clay, brown, silty, sandy, pebbly; hard, turns grayish-brown with depth, some cobbles, 

rock at 66 feet, oxidized (till)

Sand and gravel, coarse sand to fine gravel, clayey; this interval is not encountered in 

second test hole at site

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 107 feet (till)

Gravel, fine to coarse, cobbly

Clay, gray, silty, sandy, pebbly; unoxidized, gravelly from 168 to 177 feet, gravel lens 

from 181 to 184 feet and 192 to 199 feet (till)

Clay, gray, very silty; unoxidized (lake sediment)

Gravel, coarse

Clay, gray, silty, sandy, pebbly; unoxidized, sand lens from 320 to 325 feet, some shale 

inclusions, hard spots at 314 and 316 feet (till)

Clay, gray, silty, sandy, pebbly; unoxidized, E-log signature differs from above interval, 

gravel lens at 442 and 454 feet, rocks at 427, 447, and 458 feet, very poor cuttings 

(till)

Sand(?), very hard, cemented(?), some oxidized till noticed, very poor cuttings

Clay, gray, silty, sandy, pebbly, shaley; unoxidized, rocks from 525 to 528 feet, very 

poor cuttings (till)

Clay, dark-gray, shaley; hard, greasy, noncalcareous, poor cuttings (Pierre Shale)

feet most of the descriptions were made using electric log data. Drill cuttings were very poor

Section A - Geologic Logs 65
Local number: 122N51W27BBBB2R

Other identifier: R2-98-27

Site identification number: 451936097022602

Date of construction: 07-15-98

Land surface altitude: 2,025 feet

Total depth: 302 feet

_ .. Thickness 

Depth (feet)

0-2

2-7

7-11

11-14

14-40

40-79

79-265

265-283

283-298

298-302

Well screened from

2

5

4

3

26

39

186

18

15

19

282-302 feet

Altitude 

(feet)

2,025-2.023

2,023-2,018

2,018-2,014

2,014-2,011

2,011-1,985

1,985-1,946

1,946-1,760

1,760-1,742

1,742-1,727

1,727-1,723

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand, brown, fine to coarse 1

1

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Clay, brown, silty, sandy, pebbly; hard, turns grayish-brown at 54 feet, rocks at 63, 77, 

and 79 feet, oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 98 feet, maybe more than one till in 

this interval (till)

Clay, gray, very silty; unoxidized (lake sediment)

Sand and gravel, coarse sand to fine to medium gravel

Clay, gray, silty, sandy pebbly; unoxidized (till)

; 2-inch PVC screen and casing

66 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N52W1DDCC R

Other identifier: R2-98-31

Site identification number: 452213097063101

Date of construction: 07-29-98

Land surface altitude: 1,946 feet

Total depth: 462 feet

Depth

0-3

3-15

15-32

32-35

35-56

56-85

85-95

95-119

119-142

142-228

228-232

232-316

316-320

320-333

333-343

343-413

413-438

438-462

Well screened

Thickness 

(feet)

3

12

17

3

21

29

10

24

23

86

4

84

4

13

10

70

25

24

Altitude _ . .. 

(feet) Descr.pt.on

1 ,946- 1 ,943 Clay, black with some brown, silty (topsoil)

1,943-1,931 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,931-1,914 Clay, grayish-brown, silty, sandy

1,914-1,91 1 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,911-1,890 Clay, tan then brown then light-gray then tan then dark-brown, very silty; soft (loess)

1,890-1,861 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,861-1,851 Clay, grayish-brown, very silty; very soft, somewhat greasy, unoxidized (loess)

1,851-1,827 Clay, yellowish-brown, very silty

1,827-1,804 Clay, gray with brown oxidation zones, silty, sandy, pebbly; partially oxidized (till)

1 ,804- 1 ,7 1 8 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1 ,7 1 8- 1 ,7 1 4 Sand and gravel, medium to coarse sand to fine gravel

1,714-1,630 Clay, gray and brown, silty, sandy, pebbly; rocks at 262, 271, 274, and 296 feet, 

oxidized and unoxidized (till)

1 ,630- 1 ,626 Gravel, coarse; with cobbles

1,626-1,613 Clay, gray, silty, sandy, pebbly; unoxidized. very hard from 331 to 332 feet (till)

1,613-1 ,603 Sand, medium; cemented, rig chatter, poor sample

1,603-1,533 Clay, gray, silty, sandy, pebbly, shaley; unoxidized, many shale inclusions (till)

1,533-1,508 Sand and gravel, medium sand to fine gravel; cemented, rig chatter, taking water

1 ,508- 1 ,484 Clay, dark-gray to black, shaley; very greasy (Pierre Shale)

from 412 to 432 feet; 2-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 67
Local number: 122N52W9AAAA3 R

Other identifier: R2-98-34

Site identification number: 452218097095101

Date of construction: 08-25-98

Land surface altitude: 1,872 feet

Total depth: 667 feet

Depth

0-49

49-58

58-65

65-74

74-85

85-90

90-102

102-106

106-160

160-170

170-177

177-207

207-267

267-282

282-447

447-492

Thickness 

(feet)

49

9

7

9

11

5

12

4

54

10

7

30

60

15

165

45

Altitude 

(feet)

1,872-1.823

1,823-1,814

1.814-1,807

1,807-1,798

1,798-1,787

1,787-1,782

1,782-1,770

1,770-1,766

1,766-1,712

1,712-1,702

1,702-1,695

1,695-1,665

1,665-1,605

1,605-1,590

1,590-1,425

1,425-1,380

Description

Sand and gravel, coarse sand to medium to coarse gravel; oxidized

Clay, gray, silty, sandy, pebbly, unoxidized (till)

Gravel, medium to coarse

Clay, brown to dark-brown, silty, very sandy, pebbly; oxidized (till)

Clay, gray, very silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine to medium gravel

Clay, dark-gray, silty, sandy, pebbly; unoxidized, harder than till interval above (till)

Gravel

Clay, light-gray, silty, sandy, pebbly; partially oxidized, turns gray by 115 feet, gravel 

lens at 156 and 159 feet (till)

Sand, medium; cemented, poor sample

Clay, brown, very silty; oxidized (loess)

Clay, yellowish-brown, silty, sandy, pebbly; some gray noticed by 190 feet, oxidized 

(till)

Clay, gray, silty, sandy, pebbly; rock at 259 feet, unoxidized (till)

Sand and gravel, coarse sand to fine to medium gravel; rock at 282 feet

Clay, gray, silty, sandy, pebbly, shaley; unoxidized (till)

Clay, dark-gray, silty, sandy, pebbly, shaley; rocks at 454, 485, and 490 feet, E-log

signature differs slightly from above interval, unoxidized (till)

492-555 63 1,380-1,317 Clay, gray, silty, sandy, pebbly, shaley; E-log signature differs slightly from above

interval (till)

555-633 78 1,317-1,239 Sand, gray, very fine to fine, very silty; some silty clay layers

633-654 21 1,239-1,218 Clay, dark-gray to black, shaley; greasy, possibly just a block of shale and not actual

shale surface (Pierre Shale)

654-667 13 1,218-1,205 Clay, dark-gray; poor cuttings (shale? or till?) 

Electric log available; electric log signature seems to indicate till may have been re-encountered below a block of shale

68 Hydrologic snd Water-Quslity Data, 1997 through 1999, Lske Trsverse Reservation/Roberts County Investigation
Local number: 122N52W24DDDD R

Other identifier: R2-98-28

Site identification number: 451936097061201

Date of construction: 07-20-98

Land surface altitude: 1,968 feet

Total depth: 522

Depth

0-5

5-19

19-23

23-26

26-105

105-112

112-178

178-271

Thickness 

(feet)

5

14

4

3

79

7

66

93

Altitude 

(feet)

1,968-1,963

1,963-1,949

1,949-1,945

1,945-1,942

1,942-1,863

1,863-1,856

1,856-1,790

1,790-1,697

Description

Sand and gravel, medium to coarse sand to medium gravel

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, light-grayish-brown, very silty; soft (loess)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray to dark-gray with oxidized zones, silty, sandy, pebbly; hard, partially 

oxidized to unoxidized, sand zones from 42 to 45 feet and 52 to 56 feet (till)

Clay, dark-gray, very silty; somewhat greasy (loess)

Clay, yellowish-brown, silty, sandy, pebbly; hard, some gray till noticed with depth (till)

Clay, gray, silty, sandy, pebbly; unoxidized, gravel lens from 265 to 267 feet and 268 to

271-400

400-433

129

33

433-435 2 

435-472 37 

472-490 18 

490-522 32 

Electric log available

271 feet, rock at 268 feet (till)

1,697-1,568 Clay, gray, silty, sandy, pebbly; unoxidized, E-log signature differs from above interval, 

rocks at 315, 381 and 400 feet, gravel lens from 319 to 322 feet, 325 to 330 feet, and 

341 to 345 feet, some oxidized till noticed (till)

1,568-1,535 Clay, yellowish-brown and gray, silty, sandy, pebbly; oxidized zones and unoxidized 

zones, rock at 417 feet (till)

1,535-1,533 Gravel, medium to coarse

1,533-1,496 Clay, gray, silty, sandy, pebbly, shaley; unoxidized (till)

1,496-1,478 Sand, fine to medium; partially cemented, rock at 476 feet

1,478-1446 Clay, gray, shaley; hard, greasy (Pierre Shale)

Section A - Geologic Logs 69
Local number: 122N52W27BBBB R

Other identifier: R2-98-29

Site identification number: 451934097095301

Date of construction: 07-27-98

Land surface altitude: 1,875 feet

Total depth: 477 feet

Depth

0-2

2-7

7-30

30-40

40-42

42-84

84-102

102-115

115-140

140-190

190-194

194-204

204-243

243-256

256-261

261-371

371-388

388-437

437-443

443-477

Thickness 

(feet)

2

5

23

10

2

42

18

13

25

50

4

10

39

13

5

110

17

49

6

34

Altitude 

(feet)

1,875-1,873

1,873-1,868

1,868-1,851

1,851-1,841

1,841-1,839

1,839-1,797

1,797-1,779

1,779-1.766

1,766-1,741

1,741-1,691

1,691-1,687

1,687-1.677

1,677-1,638

1,638-1,625

1,625-1,620

1,620-1,510

1,510-1,493

1,493-1,444

1,444-1,438

1,438-1,404

Description

Clay, black, silty (topsoil)

Sand and gravel, medium sand to medium gravel; oxidized

Clay, tan, then dark-brown then yellowish-brown grading to grayish-brown, very 

soft, a few small pebbles, oxidized (loess?)

Clay, gray, very silty; unoxidized (loess?)

Clay, yellowish-brown, silty, sandy, pebbly; highly oxidized (till)

Clay, dark-gray, very silty, sandy, pebbly; hard, unoxidized (till)

Clay, gray, very silty: very soft, somewhat greasy (loess)

silty;

Clay, light-greenish-gray with some dark-brown, silty, sandy, pebbly; hard, oxidized 

(till)

Clay, yellowish-brown grading to light-gray with brown, silty, sandy, pebbly; oxidized 

to partially oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, medium to coarse sand to fine gravel

Clay, gray, very silty; unoxidized (lake sediment)

Sand and gravel, medium to coarse sand to fine gravel

Clay, gray, very silty; unoxidized, gravel lens from 250 feet (lake sediment?)

Gravel, fine to medium

Clay, dark-gray, silty, sandy, pebbly, shaley; unoxidized, occasional cobbles (till)

Gravel, fine to medium; hard layer from 376 to 378 feet, very clayey below 378 feet

Clay, gray, silty, sandy, pebbly, shaley; unoxidized, sand lens from 402 to 404 feet, rock 

at 390 feet (till)

Gravel, coarse; with cobbles

Clay, gray, shaley; hard, greasy (Pierre Shale)

Electric log available

70 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N52W27BBBB2 R

Other identifier: R2-98-30

Site identification number: 451934097095302

Date of construction: 07-28-98

Land surface altitude: 1,878.4 feet

Total depth: 242 feet

Depth

0-2

2-7

7-16

16-22

22-36

36-43

43-52

52-58

58-86

86-100

100-115

115-142

142-188

188-192

192-198

198-242

Thickness 

(feet)

2

5

9

6

14

7

9

6

28

14

15

27

46

4

6

44

Altitude 

(feet)

1,878.4-1,876.4

1,876.4-1,871.4

1,871.4-1,862.4

1,862.4-1,856.4

1,856.4-1,842.4

1,842.4-1,835.4

1,835.4-1,826.4

1,826.4-1,820.4

1,820.4-1,792.4

1,792.4-1,778.4

1,778.4-1,763.4

1,763.4-1,736.4

1,736.4-1,690.4

1,690.4-1,686.4

1,686.4-1,680.4

1,680.4-1,636.4

Description

Clay, black, silty (topsoil)

Sand and gravel, medium to coarse sand to medium gravel: highly oxidized

Clay, tan to yellowish-brown, very silty; soft, greasy, a few small pebbles, oxidized 

(loess?)

Clay, gray, very silty; soft, greasy, a few pebbles, unoxidized (loess?)

Clay, yellowish-brown, very silty; soft, greasy, oxidized (loess?)

Clay, yellowish-brown to brown, silty, sandy, pebbly; highly oxidized, gravel lens from 

38 to 40 feet (till)

Clay, tan to grayish-brown, very silty; oxidized (loess)

Clay, gray, very silty; greasy, unoxidized (loess)

Clay, gray, very silty, sandy, pebbly; greasy, unoxidized (till)

Clay, gray, very silty; very soft, somewhat greasy, unoxidized (loess)

Clay, light-greenish-gray with some dark brown, silty, sandy, pebbly; hard, oxidized 

(till)

Clay, yellowish-brown grading to light-gray with brown, silty, sandy, pebbly; oxidized 

to partially oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, medium to coarse sand to fine gravel

Clay, gray, very silty; unoxidized (lake sediment)

Sand and gravel, medium to coarse sand to fine gravel; clay layers common from 200 to 

208 feet, clay layer from 235 to 236 feet

Well screened from 222 to 242 feet; 2-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 71
Local number: 123N49W24AAAA

Other identifier: R2-98-21

Site identification number: 452724096442201

Date of construction: 06-23-98

Land surface altitude: 1,045 feet

Total depth: 102 feet

Depth

0-2

2-20

20-23

2324

24-39

39-42

42-67

67-75

75-102

Thickness 

(feet)

2

18

3

1

15

3

25

8

27

Altitude 

(feet)

1,045-1,043

1,043-1,025

1,025-1,022

1,022-1,021

1,021-1,006

1,006-1,003

1,003-978

978-970

970-943

Description

Sand, brown, coarse (roadfill)

Clay, brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, reddish-brown; oxidized

Clay, reddish-brown, silty, very sandy, pebbly; turns grayish-pink after 32 feet (Hawk 

Creek Till)

Sand and gravel, coarse sand to fine gravel

Clay, dark-gray, silty, sandy, pebbly; hard, unoxidized, many sand lens (till)

Clay, very light-gray, silty, sandy, pebbly; hard, gravelly, some boulders (till)

Clay, gray, shaley; hard, greasy (Carlile Shale)

Electric log available

72 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 123N50W24AAAD

Other identifier: R2-98-24

Site identification number: 452714096514501

Date of construction: 06-29-98

Land surface altitude: 1,170 feet

Total depth: 182 feet

Depth

0-1

1-12

12-42

42-47

47-50

50-102

102-123

123-138

Thickness 

(feet)

1

11

30

5

3

52

21

15

Altitude 

(feet)

1,170-1,169

1,169-1,158

1,158-1,128

1,128-1,123

1,123-1,120

1,120 1,068

1,068-1,047

1,047-1,032

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand and gravel, coarse sand to fine to medium gravel; some coarse gravel with depth

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Gravel, coarse to very coarse; some cobbles

Clay, dark-gray, shaley; hard, greasy, noncalcareous (Pierre Shale)

Clay, black, shaley; greasy, oily (Sharon Springs Member - Pierre Shale)

Clay, light-gray to white, silty; hard, gritty, chalky, very calcareous (Niobrara

138-182 42

Electric log available

Formation)

1,032-988 Clay, gray, shaley; hard, greasy, noncalcareous (Blue Hill Shale Member - Carlile 

Shale)

Section A - Geologic Logs 73
Local number: 123N51W2CCCC R

Other identifier: R2-98-33

Site identification number: 452728097011401

Date of construction: 08-19-98

Land surface altitude: 1,500 feet

Total depth: 502 feet

Depth

0-1

1-3

3-6

6-15

15-70

70-94

94-115

115-122

122-134

134-471

471-482

482-496

496-502

Thickness 

(feet)

1

2

3

9

55

24

21

7

12

337

11

14

6

Altitude 

(feet)

1,500-1,499

1,499-1.497

1,497-1,494

1,494-1,485

1,485-1,430

1,430-1,406

1,406-1,385

1,385-1,378

1,378-1,366

1,366-1,029

1,029-1,018

1,018-1,004

1,004-998

Description

Clay, black, silty (topsoil)

Sand and gravel; oxidized (roadfill)

Clay, brown, silty, sandy

Sand and gravel, coarse sand to fine gravel

Clay, gray, silty, sandy, pebbly; soft, large cuttings, sand lens from 28 to 31 feet and 52 

to 54 feet, unoxidized (till)

Clay, gray, very silty; greasy (lake sediment)

Sand and gravel, coarse sand to coarse gravel; some cobbles at base of interval

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand; some clay layers

Clay, gray, silty, sandy, pebbly, shaley: rocks at 279, 284, 342, 379, and 388 feet, very 

cobbly from 342 to 358 feet, many shale inclusions, not much change in the E-log 

signature (till)

Clay, dark-gray to black; greasy, very calcareous (Sharon Springs Member - Pierre 

Shale?)

Clay, gray, very silty; hard, very calcareous (Niobrara Formation)

Clay, gray, shaley; hard, greasy, noncalcareous (Carlile Shale)

Electric log available

74 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 123N51W19CBCB R

Other identifier: R2-99-05

Site identification number: 452507097061001

Date of construction: 06-16-99

Land surface altitude: 1,990 feet

Total depth: 792 feet

Depth

0-1

1-7

7-23

23-27

27-112

112-194

194-302

302-324

324-376

376-402

402-456

456-460

460-702

702-792

Electric log

Thickness 

(feet)

1

6

16

4

85

82

108

22

52

26

54

4

42

90

available

Altitude 

(feet)

1,990-1,989

1,989-1,983

1,983-1,967

1,967-1,963

1,963-1.878

1,878-1,796

1,796- 1,688

1,688-1,666

1,666-1,614

1,614-1,588

1,588-1,534

1,534-1,530

1,530-1,288

1,288-1,198

Description

Clay, black, silty (topsoil)

Sand, brown, medium; oxidized

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Gravel, coarse; with cobbles

Clay, gray, silty, sandy, pebbly; hard, unoxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly; rock at 114 feet, oxidized (till)

Clay, grown and gray, silty, sandy, pebbly; granite boulder from 194 to 195

Clay, gray and dark-brown, silty; greasy (lake clay or loess?)

feet (till)

Clay, yellowish-brown, silty, sandy, pebbly; rocks at 325, 343, 359, and 367 feet, 

oxidized (till)

Sand and gravel, coarse sand to fine gravel; cemented, some very hard spots

Clay, dark-gray, silty, sandy, pebbly; shaley; greasy, some shale inclusions, 

(till)

Sand; cemented, rig chatter

Clay, gray, silty, sandy, pebbly, shaley; greasy, some shale inclusions, rocks 

622 feet, unoxidized (till)

Clay, dark-gray to black, shaley; greasy, hard, noncalcareous (Pierre Shale)

unoxidized

at 533 and

Section A - Geologic Logs 75
Local number: 123N51W21DDDD R

Other identifier: R2-99-02

Site identification number: 452448097023001

Date of construction: 06-02-99

Land surface altitude: 1,824 feet

Total depth: 792 feet

Depth

0-1

1-13

13-110

110-138

138-215

215-229

229-336

336-340

340-769

769-780

780-792

Thickness 

(feet)

1

12

97

28

77

14

7

4

129

11

12

Altitude 

(feet)

1,824-1,823

1,823-1,811

1,811-1,714

1,714-1,686

1,686-1,609

1,609-1,595

1,595-1,488

1,488-1,484

1,484-1,055

1,055-1,044

1,044-1,032

Description

Clay, black, silty (topsoil)

Clay, dark-brown, silty, sandy, pebbly; greasy, some gray 15 to 18 feet, oxidized (till)

Clay, gray, silty, sandy, pebbly; greasy, gravel lens at 63 feet, rocks 84 to 86 feet and 

97 feet, unoxidized (till)

Sand and gravel, brown, medium sand to fine gravel; clay layer 

oxidized

Clay, gray to dark-gray, silty, sandy, pebbly; hard, rocks at 145, 

feet, unoxidized (till)

Sand, medium to coarse; some fine gravel

118 to 120 feet,

159, and 169 to 171

Clay, light-gray then brown, silty, sandy, pebbly; rocks at 234 and 266 feet, oxidized 

(till)

Sand and gravel

Clay, gray, very silty, sandy, pebbly, shaley; very hard, some shale inclusions, rocks at 

614, 633, 657, 703, and 724 feet, unoxidized (till)

Gravel, coarse; with cobbles

Clay, gray, silty; calcareous (Niobrara Formation)

Electric log available

Local number: 123N51W21DDDD2R

Other identifier: R20-99-48

Site identification number: 452218097022902

Date of construction: 08-18-99

Land surface altitude: 1,819.4 feet

Total depth: 138 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-1 1 1,819.4-1,818.4 Clay, black, silty (topsoil)

1-17 16 1,818.4-1,802.4 Clay, brown to yellowish-brown, silty. sandy, pebbly; greasy, some gray with reddishbrown fracture zones from 15 to 17 feet, rock at 17 feet, oxidized (till)

17-107 90 1,802.4-1,712.4 Clay, gray, silty, sandy, pebbly; greasy, gravel lens at 23 feet, rocks at 44, 73, 82, 83 to

85, 86, 87, 95, 97, 100, and 107 feet, unoxidized (till)

107-138 31 1,712.4-1,681.4 Sand and gravel, brown, medium sand to fine gravel; oxidized 

Well screened from 118 to 138 feet; 2-inch PVC screen and casing

76 Hydroiogic and Water-Quaiity Data, 1997 through 1999, Lake Traverse Reservation/Roberts County investigation
Local number: 123N52W3CCCC R

Other identifier: R2-99-01

Site identification number: 452727097095401

Date of construction: 04-28-99

Land surface altitude: 1,900 feet

Total depth: 507 feet

Depth

0-3

3-13

13-46

46-59

59-64

64-67

67-193

193-349

349-356

356-404

404-443

443-467

467-498

498-501

501-507

Thickness 

(feet)

3

10

33

13

5

3

126

336

7

48

39

24

38

3

6

Altitude 

(feet)

1,900-1,897

1,897-1,887

1,887-1,854

1,854-1,841

1,841-1,836

1,836-1,833

1,833-1,707

1,707-1,551

1,551-1,544

1,544-1,496

1,496-1,457

1,457-1,433

1,433-1,402

1,402-1,399

1,399-1,393

Description

Clay, black, silty (topsoil)

Clay, tan to yellowish-brown, silty, sandy, pebbly: rock at 7 feet, sand lens from 

9 feet, oxidized (till)

Clay, gray, silty, sandy, pebbly; greasy, unoxidized (till)

7 to

Sand and gravel, brown, medium; rock at 54 feet, clayey with rocks and coarse gravel 

54 to 59 feet

Clay, brown, silty; oxidized

Gravel, medium to coarse

Clay, brown, silty, sandy, pebbly; some gray noticed with depth, oxidized (till)

Clay, brown grading to gray with depth, silty, sandy, pebbly; E-log signature differs 

from above interval, rocks at 283 and 338 feet, oxidized (till)

Sand and gravel, coarse; rock at 352 feet

Clay, dark-gray, silty, sandy, pebbly, shaley; some shale inclusions, rocks at 372 and 

410 feet, unoxidized (till)

Sand and gravel, coarse sand to fine gravel; partially cemented, rock at 435 feet

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand(?); very hard, rig chatter, E-log signature indicates possible sand, poor sample, 

wore out the drill bit

Granite boulder

Clay, black, shaley; greasy, noncalcareous (Pierre Shale)

Electric log available

Local number: 123N52W13AADA R

Other identifier: R2-99-03

Site identification number: 452626097061201

Date of construction: 06-02-99

Land surface altitude: 2,005 feet

Total depth: 22 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-22 22 2,005-1,983 Sand and gravel, reddish-brown, coarse sand to fine gravel; highly oxidized

Section A - Geologic Logs 77
Local number: 123N52W21DDDD R

Other identifier: R2-99-04

Site identification number: 452450097095501

Date of construction: 06-09-99

Land surface altitude: 2,002 feet

Total depth: 682 feet

Depth

0-2

2-4

4-39

39-55

55-94

94-148

148-188

188-217

217 222 

222-460

460-508

508-524

524-574

574-625

625-682

Electric log

Thickness 

(feet)

2

2

35

16

39

54

40

29

5 

238

48

34

50

51

57

available

Altitude 

(feet)

2,002-2,000

2,000-1,998

1,998-1,963

1,963-1,947

1,947-1,908

1,908-1,854

1,854-1,814

1,814-1,785

1,785-1,780 

1,780-1,542

1,542-1,494

1,494-1,478

1,478-1,428

1,428-1,377

1,377-1,320

Description

Clay, black, silty (topsoil)

Sand, brown, medium; oxidized

Clay, tan to yellowish-brown, silty, sandy, pebbly; turns dark-brown then grayish-brown 

with depth, hard, oxidized (till)

Clay, gray, silty, sandy, pebbly; hard, unoxidized (till)

Clay, gray, very silty; soft, layered (lake sediment)

Clay, yellowish-brown with a greenish tinge, silty, sandy, pebbly; grades to grayishbrown with depth, oxidized (till)

Clay, light-gray, silty, sandy, pebbly; hard (till)

Clay, dark-gray to black, very silty; greasy, some dark-brown soil-like material 

(lake sediment?)

Gravel 

Clay, brown and gray, silty, sandy, pebbly; sand lens at 253, 283, 295, 297, 299,

feet, rocks at 357 and 372 feet, poor sample cuttings (till)

noticed

and 332

Clay, gray, silty, sandy, pebbly, shaley; greasy, some shale inclusions, poor sample 

cuttings, unoxidized (till)

Sand and gravel, coarse sand to fine gravel; cemented 1

Clay, gray, silty, sandy, pebbly, shaley; greasy, some shale inclusions, unoxidized (till)

Clay(?); very poor cuttings, drilled like clay but has questionable E-log signature (till?)

Clay, dark-gray to black, shaley; greasy, hard, noncalcareous (Pierre Shale)

78 Hydrologic end Water-Quality Data, 1997 through 1999, Lake Treverse Reservation/Roberts County Investigation
Local number: 124N49W19BBBC

Other identifier: R2-98-22

Site identification number: 453234096514201

Date of construction: 06-24-98

Land surface altitude: 1,130 feet

Total depth: 122 feet

Depth

0-2

2-24

24-27

27-85

85-88

88-98

98-122

Electric log

Thickness 

(feet)

2

22

3

58

3

10

24

available

Altitude 

(feet)

1,130-1.128

1,128-1,106

1,106-1,103

1,103-1,045

1,045-1,042

1,042-1.032

1,032-1,008

Description

Clay, black, silty (topsoil)

Clay, tan to yellowish-brown, silty, sandy, pebbly; oxidized, some dark-brown with 

depth (till)

Sand, brown, silty, medium to coarse

Clay, gray, silty, sandy, pebbly; unoxidized, sand lens from 33 to 35 

(till)

Sand, gray, medium; unoxidized

feet, 70 to 73 feet

Clay, gray, silty; unoxidized. very hard from 92 to 94 feet, very calcareous (Niobrara 

Formation)

Clay, gray, shaley; hard, greasy (Carlile Shale)

Local number: 124N49W21ADAD

Other identifier: R2-98-23

Site identification number: 453222096475701

Date of construction: 06-24-98

Land surface altitude: 1,095 feet

Total depth: 122 feet

Depth

0-10

10-44

44-92

92-122

Thickness 

(feet)

10

34

48

30

Altitude 

(feet)

1,095-1,085

1,085-1,051

1,051-1,003

1,003-973

Description

Clay, tan to yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 19 feet, sand lens at 28 feet, gravel 

lens from 36 to 38 feet (till)

Clay, gray, silty, sandy, pebbly; unoxidized, harder than above interval (till)

Clay, gray, shaley; hard, greasy, noncalcareous (Blue Hill Shale Member - Carlile 

Shale)

Electric log available

Section A - Geologic Logs 79
Local number: 124N51W28AAAA R

Other identifier: R2-97-48

Site identification number: 453002097022701

Date of construction: 09-08-97

Land surface altitude: 1,501 feet

Total depth: 512 feet

Depth

0-19

19-24

24-52

52-58

58-176

176-184

184-423

423-498

498-512

Thickness 

(feet)

19

5

28

6

118

8

239

75

14

Altitude 

(feet)

1,501-1,482

1,482-1,477

1,477-1,449

1,449-1,443

1,443-1,325

1,325-1,317

1,317-1,078

1,078-1,003

1,003-989

Description

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

Clay, gray, very silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Sand and gravel, coarse sand to coarse gravel; with cobbles

Clay, dark-gray, silty, sandy, pebbly; hard, rock at 78 feet, unoxidized (till)

Sand and gravel, coarse sand to medium gravel

Clay, gray to dark-gray, silty, sandy, pebbly; some hard zones, occasional rocks, drill rig 

not drilling properly, unoxidized, E-log signature changes very little over the interval 

(till)

Sand and gravel, medium to coarse sand to fine gravel; rig chatter, drills fast, cemented

Clay, black, shaley; hard, greasy, calcareous (Carlile Shale)

Electric log available

80 Hydrologic end Water-Quaiity Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 124N51W30BBBB R

Other identifier: R2-99-06

Site identification number: 452958097060901

Date of construction: 07-07-99

Land surface altitude: 2,060 feet

Total depth: 847 feet

Depth

0-38

38-70

70-81

81-132

132-140

140-152

152-211

211-275

275-377

377-405

405-417

417-427

427-722

722-730

730-847

Thickness 

(feet)

38

32

11

51

8

12

59

64

102

28

12

10

295

8

117

Altitude 

(feet)

2,060-2,022

2,022-1,990

1,990-1,979

1,979-1,928

1,928-1,920

1,920-1,908

1,908-1,849

1,849-1,785

1,785-1,683

1,683-1,655

1,655-1,643

1,643-1,633

1,633-1,338

1,338-1,330

1,330-1,213

Description

Sand and gravel, brown, fine sand to fine to medium gravel; some clay layers, oxidized

Clay, gray, silty, sandy, pebbly; hard, unoxidized (till)

Sand and gravel

Clay, brown, silty, sandy, pebbly; rocks at 87 and 88 feet, oxidized (till)

Gravel, medium; much limestone, oxidized

Clay, gray, silty; greasy (lake clay or loess?)

Clay, grayish-brown, silty, sandy, pebbly; oxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly, rock at 224 feet, highly oxidized then turns 

grayish-brown with depth (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, fine to medium; cemented, rig chatter

Clay, gray, silty; hard, smooth

Sand, gray, fine; hard, cemented, with many clay layers

Clay, gray and brown, silty, sandy, pebbly; rocks at 440, 454, 459, and 654 feet, 

cuttings, possibly more than one till unit (till)

Gravel(?)

Clay, gray, silty, sandy, pebbly; hard, unoxidized, poor cuttings (till)

poor

For electric log see R2-99-13

Section A - Geologic Logs 81
Local number: 124N51W30BBBB2 R

Other identifier: R2-99-13

Site identification number: 453002097060902

Date of construction: 08-24-99

Land surface altitude: 2,053.1 feet

Total depth: 422 feet

Depth

0-1

1-6

6-30

30-32

32-40

40-44

44-72

72-88

88-162

162-199

199-275

275-374

374-388

388-401

401-416

416-422

Thickness 

(feet)

]

5

24

2

8

4

28

16

74

37

76

99

14

13

15

6

Altitude 

(feet)

2,053.1-2,052.1

2,052.1-2,047.1

2,047.1-2,023.1

2,023.1-2,021.1

2,021.1-2,013.1

2,013.1-2,009.1

2,009.1-1,981.1

1,981.1-1,965.1

1,965.1-1,891.1

1,891.1-1,854.1

1,854.1-1,778.1

1,778.1-1,679.1

1,679.1-1,665.1

1,665.1-1,652.1

1,652.1-1,637.1

1,637.1-1,631.1

Description

Clay, tan, silty (topsoil)

Sand and gravel, brown, fine sand to fine to medium gravel: rock at 6 feet, oxidized

Clay, yellowish-brown, silty, sandy, pebbly: oxidized (till)

Sand and gravel

Clay, gray, very silty , unoxidized (lake sediment)

Sand, gray, fine

Clay, gray, silty, sandy, pebbly; hard, rocks at 64 and 72 feet, unoxidized (till)

Sand and gravel; rock at 79 feet

Clay, yellowish-brown, silty, sandy, pebbly; rocks at 87, 88, and 92 feet, grades to a 

grayish-brown by 120 feet, oxidized (till)

Clay, gray, silty, sandy, pebbly; rock at 161 feet, unoxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly; rock at 219 feet, highly oxidized then turns 

grayish-brown with depth, first few feet may have been loess (till) .

Clay, gray, silty, sandy, pebbly; rocks at 244, 246, 279, and 300 feet, unoxidized (till)

Sand, grayish-brown, fine to medium; hard, cemented, rig chatter

Clay, gray, silty; hard, smooth

Sand, gray, fine; hard, cemented, with many clay layers

Clay, gray and brown, silty, sandy, pebbly (till)

Well screened from 373 to 413 feet; 2-inch PVC screen and casing. Electric log available

82 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 124N52W9AAAC R

Other identifier: R2-99-09

Site identification number: 453234097095901

Date of construction: 08-10-99

Land surface altitude: 2,005 feet

Total depth: 807 feet

Depth

0-1

1-25

25-50

50-86

86-94

94-110

110-117

117-145

145-175

175-192

192-197

197-218

218-248

248-280

280-317

317-346

346-348

348-472

472-484

484 508

508-512

512-574

574-577

577-688

688-694

694-807

Thickness 

(feet)

1

24

25

36

8

16

7

28

30

17

5

21

30

32

37

29

2

24

12

24

4

62

3

11

6

113

Altitude 

(feet)

2,005-2,004

2,004-1,980

1,980-1,955

1,955-1,919

1,919-1,911

1,911-1,895

1,895-1,888

1,888-1,860

1,860-1,830

1,830-1,813

1,813-1,808

1,808-1,787

1,787-1,757

1,757-1,725

1,725-1,688

1,688-1,659

1,659-1,657

1,657-1,533

1,533-1,521

1,521-1,497

1,497-1,493

1,493-1,431

1,431-1,428

1,428-1,317

1,317-1,311

1,311-1,198

Description

Clay, black, silty (topsoil)

Clay, brown, silty, sandy, pebbly; oxidized (till)

Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

Clay, gray, silty, sandy, pebbly; hard, gravel lens at 69 and 74 feet

Gravel, coarse

Sand, brown, fine to medium, clayey

Gravel, coarse

Clay, grayish-brown to gray, silty, sandy, pebbly; unoxidized (till)

. unoxidized (till)

Clay, light-gray, dark-gray, brown, green and white, silty; greasy, layered, some 

calcareous zones (lake sediment)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand and gravel, coarse sand to fine gravel; oxidized

Clay, gray, silty; hard, greasy (lake sediment)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly; gravel lens from 295 

(till)

Clay, dark-gray, silty; hard, greasy (lake sediment)

Gravel

to 298 feet, oxidized

Clay, gray, silty, sandy, pebbly; rocks at 434, 446, and 454 feet, unoxidized (till)

Sand; cemented, rig chatter

Sand; cemented, with clay layers

Sand and gravel

Clay, gray, silty, sandy, pebbly; E-log signature change at 540 feet, unoxidized (till)

Gravel, coarse

Clay, gray, silty, sandy, pebbly; E-log signature change at 624 feet, unoxidized (till)

Sand, cemented

Clay, dark-gray to black, shaley; greasy, hard, noncalcareous (Pierre Shale)

Electric log available

Section A - Geologic Logs 83
Local number: 124N52W9AAAC2 R

Other identifier: R2-99-10

Site identification number: 453204097100202

Date of construction: 08-11-99

Land surface altitude: 2,003 feet

Total depth: 132 feet

Depth

0-1

1-11

11-18

18-20

20-24

24-87

87-98

98-102

102-132

Well screened

Thickness Altitude 

(feet) (feet)

1

10

7

2

4

63

11

4

30

from 112 to

2,003-2,002

2,002-1,992

1,992-1,985

1,985-1,983

1,983-1,979

1,979-1,916

1,916-1,905

1,905-1,901

1,901-1,871

132 feet; 2-inch PVC

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; rock at 32 feet, unoxidized (till)

Sand and gravel, coarse sand to fine to medium gravel; some coarse gravel

Clay, gray, silty

Sand and gravel, coarse sand to fine gravel; much black shale

screen and casing

84 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 124N52W29AAAA

Other identifier: R2-98-35

Site identification number: 453003097110901

Date of construction: 09-01-98

Land surface altitude: 1,965 feet

Total depth: 720 feet

Depth

0-1

1-14

14-26

26-48

48-62

62-92

92-125

125-136

136-146

146-153

153-178

178-229

229-239

239-262

262-380

380-450

450-454

454-597

597-720

Thickness 

(feet)

1

13

12

22

14

30

33

11

10

7

25

51

10

23

118

70

4

143

123

Altitude 

(feet) Descr.pt.on

1 ,965- 1 ,964 Clay, black, silty (topsoil)

1 ,964- 1 .95 1 Sand and gravel, coarse sand to coarse gravel; rock at 1 4 feet, oxidized

1,951-1,939 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,939-1,917 Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

1 ,9 1 7- 1 ,903 Clay, light-gray, very silty; greasy (loess)

1 ,903- 1 ,873 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,873-1,840 Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

1,840-1,829 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,829-1,819 Clay, dark-brown, very silty; somewhat greasy, oxidized (loess)

1,819-1,812 Clay, very light-gray, very silty; unoxidized (loess)

1,812-1,787 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,787- 1 ,736 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,736-1,726 Sand and gravel, medium sand to medium gravel; rock at 234 feet

1,726-1,703 Clay, gray, silty, sandy, pebbly, shaley; unoxidized (till)

1,703-1,585 Clay, gray, silty, sandy, pebbly, shaley; E-log signature differs from above interval, 

unoxidized (till)

1,585-1,515 Clay, gray, silty, sandy, pebbly, shaley

1,515-1,511 Sand, medium to coarse

1,511-1,368 Clay, gray, silty, sandy, pebbly, shaley; E-log signature differs from above interval, 

unoxidized (till)

1 ,368- 1 ,245 Clay, gray, shaley; greasy, poor cuttings, unoxidized (Pierre Shale?)

Electric log available

Section A - Geologic Logs 85
Local number: 125N50W12ABCC R

Other identifier: R2-97-23

Site identification number: 453738096515401

Date of construction: 07-15-97

Land surface altitude: 1,120 feet

Total depth: 142 feet

Depth

0-28

28-38

38-41

41-53

53-76

76-81

81-92

92-102

Thickness 

(feet)

28

10

3

12

23

5

11

10

Altitude 

(feet)

1,120-1.092

1,092-1,082

1,082-1,079

1,079-1,067

1,067-1,044

1,044-1,039

1,039-1,028

1,028-1,018

Description

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand and gravel, coarse sand to fine gravel; some medium gravel, oxidized

Clay, dark-brown, silty, sandy, pebbly; unoxidized (till)

Gravel, fine to coarse

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray, very silty; soft, drilled fast, unoxidized (lake sediment)

Clay, brown, silty, pebbly; oxidized (till)

Clay, dark-gray, silty, very sandy, pebbly; unoxidized, may be some oxidized fracture

102-118 16

118-142 24 

Electric log available

zones (till)

1,018-1,002 Sand, medium to coarse; clay lens from 113 to 116 feet, some gravel from 116 to 

118 feet

1,002-978 Clay, gray, shaley; hard, greasy, noncalcareous (Carlile Shale)

Local number: 125N50W12ABCC2 R

Other identifier: R2-97-43

Site identification number: 453738096515402

Date of construction: 08-25-97

Land surface altitude: 1,120.8 feet

Total depth: 62 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-25 25 1,120.8-1,095.8 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till) 

25-62 37 1,095.8-1,058.8 Sand and gravel, medium sand to medium gravel 

Well screened from 52 to 62 feet; 2-inch PVC casing and screen. For electric log see R2-97-23

86 Hydrologic and Water-Quelity Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigetion
Local number: 125N50W23CCCD R

Other identifier: R2-97-22

Site identification number: 453511096534301

Date of construction: 07-14-97

Land surface altitude: 1,160 feet

Total depth: 142 feet

Depth

0-1

1-18

18-100

100-112

112-117

117-142

Thickness 

(feet)

1

17

82

12

5

25

Altitude 

(feet)

1,160-1,159

1,159-1,142

1,142-1,060

1,060-1,048

1,048-1,043

1,043-1,018

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; color change to dark-brown at 14 feet, 

oxidized (till)

Clay, gray, silty, sandy, pebbly; rock at 20 feet, unoxidized (till)

Sand and gravel, coarse sand to fine gravel, rock from 110 to 112 feet

Clay, gray, silty; gritty, unoxidized, highly calcareous (Niobrara Formation)

Clay, gray, shaley; hard, greasy, noncalcareous, concretions at 135 and 139 feet (Carlile 

Shale)

Electric log available

Local number: 125N52W10BBBB R

Other identifier: R2-97-21

Site identification number: 453751097094901

Date of construction: 07-08-97

Land surface altitude: 1,970 feet

Total depth: 82 feet

Depth

0-4

4-8

8-10

10-49

49-52

52-68

68-82

Thickness 

(feet)

4

4

2

39

3

16

14

Altitude 

(feet)

1,970-1,966

1,966-1,962

1,962-1,960

1,960-1,921

1,921-1,918

1,918-1,902

1,902-1,888

Description

Clay. tan. silty

Clay, gray, silty

Sand and gravel, brown

Clay, gray, silty, sandy, pebbly: rock at 14 feet, unoxidized (till)

Clay, brown, silty, sandy, pebbly; many cobbles, oxidized (till)

Gravel, coarse to very coarse; many cobbles from 61 to 68 feet

Clay, brown, very cobbly; with large boulders, abandoned hole because of caving gravel 

and cobbles (till?)

Section A - Geologic Logs 87
Local number: 125N52W16BABB R

Other identifier: R2-99-07

Site identification number: 453659097104601

Date of construction: 07-21-99

Land surface altitude: 1,990 feet

Total depth: 942 feet

Depth

0-2

2-6

6-10

10-62

62-222

222-400

400-420

420-522

522-661

661-676

676-847

Thickness 

(feet)

2

4

4

52

160

178

20

102

139

15

171

Altitude 

(feet)

1,990-1,988

1,988-1,984

1,984-1,980

1,980-1,928

1,928-1,768

1,768-1,590

1,590-1,570

1,570-1,468

1,468-1,329

1,329-1,314

1,314-1,143

Description

Clay, black, silty (topsoil)

Sand, brown, fine; oxidized

Clay, tan, very silty; oxidized (lake sediment)

Clay, gray, very silty; greasy, unoxidized (lake sediment)

Clay, gray, very silty, sandy, pebbly, soft, gravelly from 190 to 200 feet, unoxidized

(tm)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized then grades to unoxidized with 

depth (till)

Sand and gravel, coarse sand to fine gravel; cemented

Clay, grayish-brown to gray, silty, sandy, pebbly; rocks at 471, 481, 485, and 501 feet, 

gravel lens at 490 feet, hard (till)

Clay, brown and gray, silty, sandy, pebbly; hard, very poor cuttings (till)

Sand; very hard, cemented

Clay, brown and gray, silty, sandy, pebbly; hard, very poor cuttings, rocks at 680, 696,

715, 813, 832, 840. and 847 feet (till)

847-942 95 1,143-1,048 Clay, dark-gray to black, shaley; very hard, greasy, some bentonite noticed (Pierre

Shale)

Electric log available

88 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 125N52W16BABB2 R

Other identifier: R2-99-12

Site identification number: 45365909097104502

Date of construction: 08-18-99

Land surface altitude: 1,987.9 feet

Total depth: 424 feet

Depth

0-2

2-6

6-10

10-62

62-224

224-405

405-419

419-424

Thickness 

(feet)

2

4

4

52

162

181

14

5

Altitude _ . 

(feet) Descr.pt.on

1,987.9-1,985.9 Clay, black, silty (topsoil)

1,985.9-1,981.9 Sand, brown, fine; oxidized

1 ,98 1 .9- 1 ,977.9 Clay, tan, very silty; oxidized (lake sediment)

1,977.9-1,925.9 Clay, gray, very silty; greasy, unoxidized (lake sediment)

1,925.9-1,763.9 Clay, gray, very silty, sandy, pebbly; soft, sand lens from 152 to 156 feet, unoxidized 

(till)

1,763.9-1,582.9 Clay, yellowish-brown, silty, sandy, pebbly; oxidized then grades to unoxidized with 

depth (till)

1,582.9-1,568.9 Sand and gravel, coarse sand to fine gravel; cemented

1,568.9-1,563.9 Clay, grayish-brown to gray, silty, sandy, pebbly; hard (till)

Well screened from 403 to 423 feet; 2-inch PVC screen and casing

Section A - Geologic Logs 89
Local number: 126N49W11AABA R

Other identifier: R2-97-42

Site identification number: 454303096451701

Date of construction: 08-20-97

Land surface altitude: 1,109.7 feet

Total depth: 262 feet

Depth

0-2

2-6

6-35

35-44

44-68

68-84

84-120

120-199

199-203

203-232

232-256

256-262

Thickness 

(feet)

2

4

29

19

 24

16

36

79

4

29

24

6

Well screened from 242 to 262

Altitude 

(feet)

1,109.7-1,107.7

1,107.7-1,103.7

1,103.7-1,074.7

1,074.7-1,065.7

1,065.7-1,041.7

1,041.7-1,025.7

1,025.7-989.7

989.7-910.7

910.7-906.7

906.7-877.7

877.7-853.7

853.7-8477

Description

Clay, black, silty (topsoil)

Clay, tan, silty; oxidized (loess) i

Clay, yellowish-brown, silty, sandy, pebbly; grades to dark-brown then to grayishbrown, oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Clay, gray, silty; greasy, unoxidized (lake sediment)

Sand and gravel, coarse sand to fine gravel

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 120 feet (till)

Clay, gray, silty, sandy, pebbly; unoxidized, different E-log signature than above 

interval, rock at 164 feet (till)

Gravel, fine to medium

Clay, gray, silty, sandy, pebbly, very gravelly; unoxidized (till)

Sand and gravel, coarse sand grading to fine to medium gravel; some coarse gravel

Clay, gray, silty, sandy, pebbly; unoxidized (till)

feet; 2-inch PVC casing and screen. For electric log see R2-97-41

90 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N49W11ABAA R

Other identifier: R2-97-41

Site identification number: 454305096451901

Date of construction: 08-18-19-97

Land surface altitude: 1,111 feet

Total depth: 522 feet

Depth

0-2

2-6

6-10

10-18

18-30

30-36

36-55

55-66

66-84

84-110

110-120

120-136

136-143

143-148

148-206

206-260

260-310

310-409

409-476

476-498

498-522

Thickness 

(feet)

2

4

4

8

12

6

19

11

18

26

10

16

7

5

58

54

50

99

67

22

24

Altitude _ . .. (feet) Descr.pt.on

1 , 1 1 1 - 1 , 109 Clay, black, silty (topsoil)

1,109-1,105 Clay, tan, silty (loess)

1,105-1,101 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,101-1.093 Clay, yellowish-brown, silty; greasy (lake sediment)

1,093-1,081 Clay, yellowish-brown, silty, sandy, pebbly; oxidized, grades to dark-brown by 25 feet 

(till)

1,081-1,075 Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

1,075-1,056 Clay, gray, silty, sandy, pebbly; unoxidized, some lake sediment inclusions (till)

1,056-1,045 Clay, gray, silty; soft, greasy, unoxidized (lake sediment)

1,045-1,027 Sand and gravel, medium to coarse sand to fine gravel

1 ,027- 1 ,00 1 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,001-991 Clay, gray, silty; soft, greasy, unoxidized (lake sediment)

991 -975 Sand and gravel, coarse sand to fine gravel

975-968 Clay, gray, silty; soft, greasy, unoxidized (lake sediment)

968-963 Sand, gray, fine to medium; unoxidized

963-905 Clay, gray, silty, sandy, pebbly; unoxidized, gravel lens at 188 and 197 feet (till)

905-85 1 Sand and gravel, medium to coarse sand to fine gravel

851-801 Clay, gray, sandy, pebbly; unoxidized (till)

801-702 Clay, gray, silty, sandy, pebbly; unoxidized, different E-log signature than above 

interval (till)

702-635 Clay, gray, silty, sandy, pebbly

635-613 Sand, white, fine to medium; mostly quartz, some mica (granite wash)

613-589 Clay, black with a purplish tinge, silty; very greasy, oily, noncalcareous (Graneros 

Shale)

Electric log available

Section A - Geologic Logs 91
Local number: 126N49W15ADDA R

Other identifier: R2-97-24

Site identification number: 454157096462501

Date of construction: 07-15-97

Land surface altitude: 990 feet

Total depth: 222 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-6 6 990-984 Clay, black, silty (alluvium)

6-10 4 984-980 Clay, brown, light-gray and black layered, some pebbles (lake sediment)

10-12 2 980-978 Clay, black, silty (lake sediment)

12-19 7 978-971 Clay, light-gray, silty; calcareous, some fine sand, rocks at 17 and 19 feet

19-39 20 971-951 Sand, gray, fine; unoxidized

39-52 13 951-938 Clay, silt and sand, gray; alternating layers (lake sediment)

52-118 66 938-872 Clay, gray, shaley; soft, greasy, noncalcareous (Blue Hill Shale Member - Carlile Shale)

118-187 69 872-803 Clay, dark-brownish-gray; hard, some silty zones, some greasy zones, calcareous

(Fairport Shale Member - Carlile Shale)

187-218 31 803-772 Siltstone, brown; some hard cherty layers, some white chalky layers, very calcareous

(Greenhorn Limestone)

218-222 4 772-768 Clay, gray; greasy (Graneros Shale)

92 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N50W6CCCC R

Other identifier: R2-97-36

Site identification number: 454306096584301

Date of construction: 08-11-97

Land surface altitude: 1,164 feet

Total depth: 202 feet

Depth

0-3

3-32

32-38

38-67

67-96

96-104

104-165

165-202

Thickness 

(feet)

3

29

6

29

29

8

61

37

Altitude 

(feet)

1,164-1,161

1,161-1,132

1,132-1,126

1,126-1,097

1,097-1,068

1,068-1,060

1,060-999

999-962

Description

Clay, black (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; covered by several feet of loess, 

(till)

Clay, reddish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Sand and gravel, coarse sand to fine gravel; mostly shale pebbles

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, fine to medium; some silt and clay layers, unoxidized

oxidized

Clay, gray, shaley; hard, greasy, noncalcareous, concretion from 187 to 188 feet (Carlile 

Shale)

Electric log available

Local number: 126N51W27BBBB R

Other identifier: R2-97-05

Site identification number: 454030097021901

Date of construction: 06-11 -97

Land surface altitude: 1,215 feet

Total depth: 62 feet

Depth

0-2

2-15

15-37

37-62

Electric log

Thickness 

(feet)

2

14

21

25

available

Altitude 

(feet)

1,215-1,213

1,213-1,200

1,200-1,178

1,178-1,153

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray, shaley; hard, greasy (Pierre Shale)

Section A - Geologic Logs 93
Local number: 126N52WIDDDD R

Other identifier: R2-97-09

Site identification number: 454305097060901

Date of construction: 06-17-97

Land surface altitude: 1,252 feet

Total depth: 82 feet

Depth

0-2

2-24

24-27

27-52

Thickness 

(feet)

2

22

3

25

Altitude 

(feet)

1,252-1,250

1,250-1,228

1,228-1,225

1,225-1,200

Topsoil, black

Clay, tan to brown, silty, sandy; 

(till?)

Sand, fine

Clay, tan to white, shaley; hard,

Description

turns grayish-brown at 17 feet, very shaley with depth

greasy, mottled, turns darker brown to grayish-brown

with depth (weathered Pierre Shale)

52-82 30 1,200-1,170 Clay, gray, shaley; hard, greasy, good cuttings (Pierre Shale) 

Electric log available

94 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N52W20CCCB R

Other identifier: R2-99-08

Site identification number: 454033097122101

Date of construction: 07-28-99

Land surface altitude: 2,035 feet

Total depth: 747 feet

Depth

0-2

2-36

36-75

75-83

83-108

108-124

124-184

184-282

282-286

286-466

466-476

476-627

627-637

637-720

720-747

Thickness 

(feet)

2

34

34

8

85

16

60

98

4

180

10

151

10

83

27

Altitude 

(feet)

2,035-2,033

2,033-1.999

1,999-1,960

1,960-1,952

1,952-1,927

1,927-1,911

1,911-1,851

1,851-1,753

1,753-1,749

1,749-1,569

1,569-1,559

1,559-1,408

1,408-1,398

1,398-1,315

1,315-1,288

Description

Clay brown, silty, gravelly (topsoil)

Sand and gravel, brown, medium sand grading to coarse gravel with depth; some 

cobbles, oxidized

Clay, gray, silty, sandy, pebbly; hard, unoxidized (till)

Clay, tan, silty; oxidized (loess)

Clay, yellowish-brown, silty, sandy, pebbly dark-brown at 96 feet, oxidized (till)

Clay, dark-brown and gray, very silty; greasy, layered (lake sediment)

Clay, yellowish-brown, silty, sandy, pebbly; rock at 126 feet, oxidized (till)

Clay, light-gray to gray with brown oxidation zones, silty, sandy, pebbly; partially 

oxidized (till)

Gravel

Clay, gray, silty, sandy, pebbly; rock at 3 14 feet, unoxidized (till)

Sand and gravel, coarse sand to fine gravel

Clay, gray, silty, sandy, pebbly, shaley; hard, unoxidized (till)

Sand; hard

Clay, gray, silty, sandy, pebbly, shaley; hard rocks at 670, 677, 685, 686, 689, 6%, 699 

to 702, 703, 705, 707, 709, 710, 715, 717, and 719 feet, unoxidized, poor cuttings 

(till)

Clay, dark-gray, shaley; hard, greasy (Pierre Shale)

Electric log available

Section A - Geologic Logs 95
Local number: 127N48W21DDDC R

Other identifier: R2-97-44

Site identification number: 454541096400501

Date of construction: 08-25-97

Land surface altitude: 1,090 feet

Total depth: 282 feet

Depth

0-2

2-6

6-10

10-28

28-60

60-72

72-85

85-114

114-123

123-192

192-207

207-226

226-241

241-272

272-282

Thickness 

(feet)

2

4

4

18

32

12

13

29

9

69

15

19

15

31

10

Altitude 

(feet)

1,090-1,088

1.088-1.084

1,084-1,080

1,080-1,062

1,062-1,030

1,030-1,018

1,018-1,005

1,005-976

976-967

967-898

898-883

883-864

864-849

849-818

818-808

Description

Clay, black, silty (topsoil)

Clay, tan, silty; oxidized (loess)

Sand, brown, medium; dirty, oxidized

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand, brown, fine to medium; oxidized

Sand, gray, fine to medium; unoxidized

Clay, gray, silty; greasy, unoxidized (lake sediment)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine gravel; rock at 116 feet

Clay, gray, silty, sandy, pebbly; gravel lens from 138 to 142 feet, and 148 to 150 feet, 

very gravelly clay from 151 to 155 feet, unoxidized (till)

Clay, gray, very silty; hard, greasy, unoxidized (lake sediment)

Sand, gray, medium to coarse; rock at 220 feet

Clay, gray; oily, greasy, calcareous (Fairport Shale Member - Carlile Shale)

Siltstone, brown; with brown and white silty clay layers, hard, cherty, very calcareous 

(Greenhorn Limestone)

Clay, gray; hard, greasy, slightly calcareous (Graneros Shale)

Electric log available

96 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 127N48W28AAAA R

Other identifier: R2-97-45

Site identification number: 454541096400502

Date of construction: 08-26-97

Land surface altitude: 1,090.8 feet

Total depth: 72 feet

Depth

0-2

2-8

8-28

28-60

60-72

Thickness 

(feet)

2

6

20

22

12

Altitude 

(feet)

1,090.8 1,088.8

1,088.8-1,082.8

1,082.8-1,062.8

1,062.8-1,030.8

1,030.8-1,018.8

Description

Clay, black, silty (topsoil)

Clay, tan, silty; oxidized (loess)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand, brown, fine to medium: oxidized

Sand, gray, fine to medium; unoxidized

Well screened from 62 to 72 feet; 2-inch PVC casing and screen. For electric-log see R2-97-44

Section A - Geologic Logs 97
Local number: 127N49W21DDDC R

Other identifier: R2-97-40

Site identification number: 454541096473901

Date of construction: 08-12-97

Land surface altitude: 1,092 feet

Total depth: 282 feet

Depth

0-2

2-26

26-30

30-35

35-60

60-92

92-114

114-145

145-148

148-158

158-190

190-220

220-270

270-282

Electric log

Thickness 

(feet)

2

24

4

5

25

32

22

31

3

10

32

30

50

12

available

Altitude 

(feet)

1,092-1,090

1,090-1,066

1,066-1,062

1,062-1.057

1.057-1,032

1,032-1,000

1,000-978

978-947

947-944

944-934

934-902

902-872

872-822

822-810

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, brown, silty; oxidized (lake sediment)

Clay, grayish-brown to gray, silty; hard, greasy (lake sediment)

Sand and gravel, fine to very fine sand grading to coarse sand to very fine gravel

Clay, gray, very silty; greasy, unoxidized, sand lens from 78 to 80 feet (lake sediment)

Clay, gray, silty, sandy, pebbly; hard, gravelly, unoxidized (till)

Clay, gray, silty, sandy; very hard, very few pebbles, many shale inclusions, rock at 

138 feet, unoxidized (till)

Gravel, fine to medium

Clay, light-gray, silty, very sandy, pebbly (till)

Clay, greenish-brown, silty, sandy, pebbly; rocks at 164 and 175 feet, highly oxidized 

(till)

Clay, dark-gray, silty; hard, greasy, poor cuttings (till? or lake sediment?)

Clay, brownish-black, silty; oily, greasy, chalky, calcareous (Fairport Shale Member - 

Carlile Shale)

Siltstone, brown, hard; some brown and white clay layers, cherty, very calcareous, rig 

chatter (Greenhorn Limestone)

98 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 127N50W7BBBB R

Other identifier: R2-97-37

Site identification number: 454817096584601

Date of construction: 08-11 -97

Land surface altitude: 1,168 feet

Total depth: 222 feet

Depth

0-3

3-14

14-18

18-82

82-88

88-196

96-104

104-110

110-119

119-126

126-177

177-183

183-222

Electric log

Thickness 

(feet)

3

11

4

64

6

108

8

6

9

7

51

6

39

available

Altitude 

(feet)

1,168-1,165

1,165-1,154

1,154-1,150

1,150-1,086

1,086-1,080

1,080-1,072

1,072-1,064

1,064-1,058

1,058-1,049

1,049-1,042

1,042-991

991-985

985-946

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, grayish-brown, silty, sandy, pebbly; partially oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, greasy, large cuttings, sand lens from 65 to 67 feet, 

unoxidized (till)

Clay, gray, silty; greasy (lake sediment)

Sand, gray, fine, silty; unoxidized

Clay, gray, silty; greasy (lake sediment)

Sand, gray, fine, silty; unoxidized

Clay, gray, silty, sandy; unoxidized (till?)

Sand and gravel, coarse sand to fine to medium gravel; rock at 125 feet

Clay, gray, silty. sandy, pebbly; hard, softer from 163 to 172 feet, unoxidized (till)

Gravel, medium to coarse

Clay, dark-gray, shaley; hard, greasy (Carlile Shale)

Section A - Geologic Logs 99
Local number: 127N50W9AAAA R

Other identifier: R2-97-38

Site identification number: 454818096550601

Date of construction: 08-12-97

Land surface altitude: 1,119 feet

Total depth: 162 feet

Depth

0-2

2-25

25-58

58-85

85-135

135-162

Electric log

Thickness 

(feet)

2

23

33

27

50

27

available

Altitude 

(feet)

1,119-1,117

1,117-1,094

1,094-1,061

1,061-1,034

1,034-984

984-957

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; gravel lens from 23 to 24 feet, oxidized 

(till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, gray, fine to medium sand grading to medium gravel, rock at 84 feet

Clay, gray, silty, sandy, pebbly; rocks at 98, 130, and 132 feet, gravel lens at 116 and 

124 feet, unoxidized (till)

Clay, dark-gray, shaley; hard greasy, noncalcareous (Carlile Shale)

Local number: 127N50W9AAAA2 R

Other identifier: R2-97-39

Site identification number: 454818096550602

Date of construction: 08-12-97

Land surface altitude: 1,119.2 feet

Total depth: 82 feet

Depth

0-2

2-25

25-62

62-82

Thickness 

(feet)

2

23

37

20

Altitude 

(feet)

1,119.2-1,117.2

1,117.2-1,094.2

1,094.2-1,057.2

1,057.2-1,037.2

Description

Clay, black, silty (topsoil)

Clay, yellowish-brown, silty, sandy, pebbly; rock at 20 feet,

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine gravel

oxidized (till)

Well screened from 72 to 82 feet; 2-inch PVC casing and screen. For electric log see R2-97-38

100 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 127N51W9AAAAR

Other identifier: R2-97-06

Site identification number: 454820097023601

Date of construction: 06-11-97

Land surface altitude: 1,188 feet

Total depth: 242 feet

Depth

0-3

3-6

6-18

18-21

21-24

24-67

67-99

99-143

143-177

177-208

208-242

Thickness 

(feet)

3

3

12

3

3

43

32

44

34

31

34

Altitude 

(feet)

1,188-1,185

1,185-1,182

1,182-1,170

1,170-1,167

1,167-1,164

1,164-1,121

1,121-1,089

1,089-1,045

1,045-1,011

1,011-980

980-946

Description

Topsoil. black

Clay, tan, very silty (loess)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, dark-brown, silty, sandy, pebbly; oxidized, rock at 23 feet (till)

Clay, gray, silty, sandy, pebbly; large cuttings, unoxidized, gravel lens from 55 to 57 feet 

and 58 to 59 feet (till)

Sand and gravel medium sand to fine gravel; some medium to coarse gravel, much 

shale

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray, very silty, sandy; some fine sand layers (lake sediment)

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 206 feet (till)

Clay, gray, shaley; greasy, noncalcareous (Carlile Shale)

Electric log available

Section A - Geologic Logs 101
Local number: 127N51W9AAAA2R

Other identifier: R2-97-07

Site identification number: 454820097023602

Date of construction: 06-11 -97

Land surface altitude: 1,188.7 feet

Total depth: 102 feet

Depth

0-3

3-24

24-67

67-102

Thickness 

(feet)

3

21

43

35

Altitude 

(feet)

1,188.7-1,185.7

1,185.7-1,164.7

1,164.7-1,121.7

1,121.7-1,086.7

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly, oxidized (till)

Sand and gravel, medium sand to fine gravel; some medium to coarse gravel, much 

shale

Well screened from 92 to 102 feet; 2-inch PVC screen and casing. Electric log available

Local number: 127N51W21DDDA R

Other identifier: R2-97-08

Site identification number: 454543097022701

Date of construction: 06-16-97

Land surface altitude: 1,155 feet

Total depth: 155 feet

Depth

0-3

3-5

5-15

15-90

90-122

122-135

135-155

Electric log

Thickness 

(feet)

3

2

to

75

32

13

20

available

Altitude 

(feet)

1,155-1,152

1,152-1,150

1,150-1,140

1,140-1,065

1,065-1.033

1,033-1.020

1,020-1,000

Description

Topsoil, black

Gravel and cobbles

Clay, brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly: sand lens from 80 to 82 feet (till)

Sand, gray, fine: unoxidzed

Clay, gray, silty; very silty to sandy from 127 to 135 feet (lake sediments)

Clay, gray; hard, greasy, noncalcareous, concretion at 147 feet (Carlile Shale)

102 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 127N52W4DCDCR

Other identifier: R2-97-19

Site identification number: 454819097102101

Date of construction: 07-07-97

Land surface altitude: 1,231 feet

Total depth: 102 feet

Depth

0-5

5-12

12-53

53-58

58-66

66-74

74-102

Thickness 

(feet)

5

7

41

5

8

8

28

Altitude 

(feet)

1,231-1,226

1,226-1,219

1,219-1,178

1,178-1.173

1,173-1,165

1,165-1,157

1,157-1,129

Description

Clay, tan, silty; oxidized (alluvium)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; large cuttings, unoxidized (till)

Clay, gray, very silty; unoxidized (lake clay)

Sand and gravel, coarse sand to fine gravel

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray; hard, greasy, noncalcareous (Pierre Shale)

Electric log available

Local number: 127N52W25AAAAR 

Other identifier: R2-97-10

Site identification number: 454538097061101

Date of construction:

Land surface altitude:

Total depth: 182 feet

06-17-97

1,182 feet

_ .. Thickness Altitude 

Depth (feet) (feet)

0-2 2

2-7 5

7-9 2

9-39 30

39-58 19

58-100 42

100-151 51

151-157 6

157-182 25

Electric log available

1,182-1,180

1,180-1,175

1,175-1,173

1,173-1,143

1,143-1,124

1,124-1,082

1,082-1,031

1,031-1,025

1,025-1,000

Description

Topsoil, black

Clay, brown, very silty; oxidized

Clay, gray, very silty; unoxidized

Sand and gravel, medium sand to fine gravel

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, gray, shaley; hard, greasy, noncalcareous (Pierre Shale)

Clay, black, shaley; hard, gritty, oily, noncalcareous (Sharon Springs Member- Pierre 

Shale)

Clay, gray, silty; hard, calcareous (Niobrara Formation?)

Clay, gray, shaley; hard, greasy (Carlile Shale)

Section A - Geologic Logs 103
Local number: 127N52W25AAAA2 R

Other identifier: R2-97-11

Site identification number: 454538097061102

Date of construction: 06-17-97

Land surface altitude: 1,182.4 feet

Total depth: 42 feet

Depth

0-2

2-9

9-12

12-36

36-42

Thickness 

(feet)

2

7

3

24

6

Well screened from 23.1 to 33.

Altitude 

(feet) Descr,pt,on

1 , 1 82.4- 1 , 1 80.4 Topsoil, black

1,180.4-1,173.4 Clay, brown, very silty, sandy; oxidized

1,173.4-1,170.4 Clay, gray, silty, sandy; unoxidized

1,170.4-1,146.4 Sand and gravel, fine sand grading to fine to medium gravel

1,146.4-1,140.4 Clay, gray, silty

.1 feet; 2-inch PVC casing and screen. For electric log see R2-97-10

104 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N48W19BCCC R

Other identifier: R2-97-30

Site identification number: 455123096434701

Date of construction: 07-28-97

Land surface altitude: 1,078.6 feet

Total depth: 234 feet

Depth

0-1

1-8

8-25

25-76

76-102

102-108

108-135

135-151

151-168

168-185

185-229

229-233

233-234

Thickness 

(feet)

1

7

17

51

26

6

27

16

17

17

44

4

1

Well screened from 207 to 227

Altitude _ . . 

(feet) Descr,pt,on

1,078.6-1,077.6 Topsoil, black, sandy

1 ,077.6- 1 ,070.6 Sand, brown, fine; oxidized

1,070.6-1,053.6 Clay, brown, silty, very, sandy, pebbly; oxidized (till)

1,053.6-1,002.6 Sand, gray, very fine to fine; grades into lake sediment with depth, some clay layers, 

unoxidized

1,002.6-976.6 Clay, gray, very silty, sandy; greasy, unoxidized (lake sediment)

976.6-970.6 Sand, gray, fine; unoxidized

970.6-943.6 Clay, gray, silty, sandy, pebbly; unoxidized (till)

943.6-927.6 Clay, dark-gray, silty, very sandy, pebbly; harder than above interval, unoxidized rock at 

144 feet (till)

927.6-910.6 Gravel, fine to coarse; cobbly

910.6-893.6 Clay, brown and gray, silty, sandy; alternating layers (lake sediments)

893.6-849.6 Sand, coarse; rig chatter, possibly cemented

849.6-845.6 Clay, dark-grayish-brown, silty; hard calcareous (Fairport Shale Member - Carlile 

Shale)

845.6-844.6 Siltstone; hard, cherty, calcareous (Greenhorn Limestone)

feet; 2-inch PVC casing and screen. Rosholt has installed a city well very near this observation well

Section A - Geologic Logs 105
Local number: 128N48W30BBBB R

Other identifier: R2-97-29

Site identification number: 455055096434801

Date of construction: 07-23-97

Land surface altitude: 1,092 feet

Total depth: 252 feet

Depth

0-1

1-10

10-20

20-32

32-65

65-70

70-78

78-113

113-144

144-185

185-194

194-248

248-252

Thickness 

(feet)

1

9

10

12

33

5

8

35

31

41

9

54

4

Electric log available to 180 feet;

Altitude 

(feet)

1,092-1,091

1,091-1,082

1,082-1,072

1,072-1,060

1,060-1,027

1,027-1,022

1.022-1.014

1,014-979

979-948

948-907

907-898

898-844

844-840

Description

Topsoil, black

Sand, yellowish-brown, fine to medium, silty, clayey; dirty, oxidized

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Sand, brown, fine to medium: oxidized

Sand, gray, fine to medium; unoxidized

Clay, gray, silty; greasy, unoxidized (lake sediment)

Sand, gray, fine to medium; unoxidized

Clay, gray, silty; greasy, unoxidized (lake sediments)

Clay, gray, silty, sandy, pebbly; rock at 132 feet, unoxidized (till)

Clay, gray, silty, sandy, pebbly; harder than above interval, with a differing E-log 

signature, unoxidized (till)

Clay, gray, green, and brown, silty, sandy; alternating layers (lake sediment)

Sand and gravel, coarse sand to fine gravel

Siltstone; hard, cherty, calcareous, fractured, lost all of the drilling fluid, drill stem stuck 

in hole, abandoned hole (Greenhorn Limestone)

abandoned hole when circulation could not be established

106 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N49W1DDAD R

Other identifier: R2-97-31

Site identification number: 455341096434701

Date of construction: 07'-29-97

Land surface altitude: 1,072 feet

Total depth: 262 feet

Depth

0-4

4-20

20-24

24-54

54-71

71-102

102-117

117-138

138-204

204-262

Thickness 

(feet)

4

16

4

30

17

31

15

21

66

58

Altitude 

(feet)

1,072-1,068

1,068-1,052

1,052-1,048

1,048-1,018

1,018-1,001

1,001-970

970-955

955-934

934-868

868-810

Description

Clay, black, silty (topsoil and alluvium)

Sand, brown, coarse; oxidized

Clay, brown, silty, sandy, pebbly; oxidized (till)

Sand, gray, fine, unoxidized

Silt, sand and clay, gray; very clayey from 54 to 62 feet, alternating layers (lake 

sediment)

Clay, gray, silty; greasy, unoxidized (lake sediment)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Gravel, fine to medium

Clay, gray, silty, sandy, pebbly; unoxidized, many cobbles, gravel lens from 167 to 168 

feet and 170 to 172 feet (till)

Clay, gray, silty; greasy, some calcareous zones (Graneros Shale?)

Electric log available

Local number: 128N49W1DDAD2 R

Other identifier: R2-97-32

Site identification number: 455341096435001

Date of construction: 07-29-97

Land surface altitude: 1,071.7 feet

Total depth: 142 feet

Depth

0-4

4-35

35-57

57-100

100-130

130-142

Well screened

Thickness 

(feet)

4

31

22

43

30

12

from 132 to 142

Altitude 

(feet)

1,071.7-1,067.7

1,067.7-1,036.7

1,036.7-1,014.7

1,014.7-971.7

971.7-941.7

941.7-929.7

Description

Clay, black, silty (topsoil and alluvium)

Sand, yellowish-brown, fine to coarse; some fine gravel, oxidized

Sand, gray, fine; some clay layers, unoxidized

Clay, gray, silty, sandy; greasy, unoxidized (lake sediment)

Clay, gray, silty, sandy, pebbly; sand lens at 117 feet, unoxidized (till)

Sand and gravel, coarse sand to fine to medium gravel

feet; 2-inch PVC casing and screen. For electric log see R2-97-31

Section A - Geologic Logs 107
Local number: 128N49W21DDAD R

Other identifier: R2-97-35

Site identification number: 455104096473501

Date of construction: 08-05-97

Land surface altitude: 1,076 feet

Total depth: 322 feet

Depth

0-1

1-16

16-26

26-59

59-70

70-77

77-94

94-106

106-112

112-118

118-138

138-160

160-183

183-240

240-291

291-294

294-322

Thickness 

(feet)

1

15

10

33

1]

7

17

12

6

6

20

22

23

57

51

3

28

Altitude _ . .. 

(feet) Descr,pt,on

1 ,076- 1 ,075 Clay, black (topsoil)

1,075-1,060 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1 ,060- 1 ,050 Sand, brown, medium to coarse; oxidized

1 ,050- 1 ,01 7 Sand, gray, fine; some very silty zones, unoxidized

1,017-1,006 Clay, gray, silty; greasy, unoxidized (lake sediment)

1,006-999 Sand, gray, fine, silty; unoxidized

999-982 Clay, gray, silty; greasy, unoxidized (lake sediment)

982-970 Clay, gray, silty, sandy, pebbly; unoxidized (till)

970-964 Gravel, medium to coarse; rock at 1 10 feet

964-958 Clay, gray, silty, sandy, pebbly; unoxidized (till)

958-938 Gravel, fine to coarse

938-9 16 Sand, medium to coarse

916-893 Clay, gray, silty, sandy, pebbly; unoxidized (till)

893-836 Sand and gravel, coarse sand to fine gravel

836-785 Sand, medium to coarse; hard, cemented

785-782 Gravel and boulders

782-754 Clay, dark-gray; greasy, calcareous (Graneros Shale)

Electric log available

108 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N50W1DDDC R

Other identifier: R2-97-28

Site identification number: 455334096512001

Date of construction: 07'-22-97

Land surface altitude: 1,093 feet

Total depth: 222 feet

Depth

0-3

3-17

17-20

20-24

24-36

36-64

64-70

70-86

86-120

120-125

125-163

163-168

168-180

180-194

194-198

198-222

Thickness 

(feet)

3

14

3

4

12

28

6

14

34

5

38

5

12

14

4

24

*Se De!"*«°"

1 ,093- 1 ,900 Clay, black (topsoil)

1,090-1,076 Clay, tan to yellowish-brown, silty, sandy; oxidized (loess or lake sediment?)

1,076-1,073 Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

1,073-1,069 Clay, gray, silty, sandy, pebbly; unoxidized (till)

1,069-1,057 Sand, gray, fine, silty; unoxidized

1,057-1,029 Silt, sand, and clay, gray; alternating layers (lake sediment)

1 ,029- 1 ,023 Sand, gray, fine; unoxidized

1,023-1,007 Clay, gray, silty; greasy, unoxidized (lake sediment)

1,007-973 Clay, gray, silty, sandy, pebbly; rocks and gravel from 91 to 95 feet, gravel lens from 

108 feet, unoxidized (till)

973-968 Sand and gravel, coarse sand to medium gravel

968-930 Clay, gray, silty, sandy, pebbly; unoxidized (till)

930-925 Sand and gravel, medium sand to fine gravel

925-913 Clay, gray, silty; greasy, unoxidized, some sandy zones (lake sediment)

913-899 Clay, gray, silty, sandy, pebbly; unoxidized (till)

899-895 Sand and gravel, coarse sand to fine gravel

895-87 1 Clay, dark-gray to brownish-black; hard, greasy, calcareous (Carlile Shale)

Electric log available

Section A - Geologic Logs 109
Local number: 128N50W25AAAB R

Other identifier: R2-97-25

Site identification number: 455058096511801

Date of construction: 07-21-97

Land surface altitude: 1,096 feet

Total depth: 258 feet

Depth

0-1

1-10

10-19

19-22

22-62

62-83

83-92

92-122

122-210

210-222

222-248

248-256

256-258

Thickness 

(feet)

1

9

9

3

40

21

9

30

88

12

26

8

2

Altitude 

(feet)

1,096-1,095

1,095-1,086

1,086-1,077

1,077-1,074

1,074-1,034

1,034-1,013

1,013-1,004

1,004-974

974-886

886-874

874-848

848-840

840-838

Description

Clay, black (topsoil)

Clay, tan, silty (roadfill and loess)

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, fine to medium; unoxidized clay layers from 42 to 50 feet

Clay, gray, very silty; unoxidized (lake sediment)

Sand, gray, fine to medium; unoxidized

Clay, gray, silty, sandy, pebbly; unoxidized, rocks at 90, 92, 105, and 122 feet, shale 

gravel lens at 105 feet (till)

Sand and gravel, coarse sand to fine to medium gravel; many clay layers and clayey

zones

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Gravel, coarse to very coarse; with cobbles

Clay, dark-gray; hard, greasy, calcareous (Fairport Shale Member - Carlile Shale)

Siltstone, brown; very hard, cherty, very calcareous (Greenhorn Limestone)

Electric log available

110 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N50W25AAAB2R

Other identifier: R2-97-26

Site identification number: 455058096511802

Date of construction: 07-22-97

Land surface altitude: 1,095.9 feet

Total depth: 202 feet

Depth

0-17

17-26

26-67

67-96

96-130

130-202

Well screened

Thickness Altitude 

(feet) (feet)

17

9

41

29

34

72

from 190 to

1,095.9-1,078.9

1,078.9-1.069.9

1,069.9-1,028.9

1,028.9-999.9

999.9-965.9

965.9-893.9

Description

Clay, tan to yellowish-brown, silty (loess over oxidized till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, very fine to fine, unoxidized

Clay, gray, very silty, sandy; unoxidized, gravel lens near bottom of interval (lake 

sediment)

Clay, gray, silty, sandy, pebbly, unoxidized, gravel lens at 107 feet (till)

Sand and gravel, coarse sand to fine to medium gravel; some clay layers

200 feet; 2-inch PVC casing and screen. For electric-log see R2-97-25. North of two wells

Local number: 128N50W25AAAB3 R

Other identifier: R2-97-27

Site identification number: 455058096511803

Date of construction: 07-22-97

Land surface altitude: 1,095.4 feet

Total depth: 62 feet

Depth

0-18

18-27

27-62

Well screened

Thickness 

(feet)

18

9

35

Altitude 

(feet)

1,095.4-1,077.4

1,077.4-1,068.4

1,068.4-1,033.4

Description

Clay, yellowish- brown, silty, sandy, pebbly; oxidized

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand, gray, very fine to fine; unoxidized

(till)

from 52 to 62 feet; 2-inch PVC casing and screen. For electric log see R2-97-25. South of two wells

Section A - Geologic Logs 111
Local number: 128N50W28AAAA R

Other identifier: R2-97-14

Site identification number: 455054096550201

Date of construction: 06-24-97

Land surface altitude: 1,102 feet

Total depth: 342 feet

Depth

0-10

10-17

17-20

20-36

36-62

62-114

114-126

126-202

202-223

223-261

261-296

296-342

Thickness 

(feet)

10

7

3

16

26

52

12

76

21

38

35

46

Altitude 

(feet)

1,102-1,092

1,092-1,085

1,085-1,082

1,082-1,066

1,066-1,040

1,040-988

988-976

976-900

900-879

879-841

841-806

806-760

Description

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, medium sand to fine gravel

Clay, gray, very silty, sandy; unoxidized

Sand, gray, fine; unoxidized

Clay, gray, silty, very sandy, pebbly; sand lens 75 to 80 feet and 99 to 102 feet 

unoxidized (till)

Sand, gray, fine; unoxidized

Clay, gray, silty, sandy, pebbly; rocks at 137 and 152 feet, unoxidized (till)

Sand and gravel, medium sand to fine gravel; clay layer from 218 to 222 feet

Clay, dark-gray, silty; gritty, calcareous (Fairport Shale Member - Carlile Shale)

Clay, brownish-gray to dark-gray, silty; some white calcareous layers, some hard 

calcareous limestone layers, very calcareous (Greenhorn Limestone)

Clay, dark-gray, shaley; hard, greasy (Graneros Shale)

Electric log available

Local number: 128N50W30BABB R

Other identifier: R2-97-13

Site identification number: 455054096582101

Date of construction: 06-23-97

Land surface altitude: 1,172 feet

Total depth: 242 feet

Depth

0-1

1-21

21-86

86-98

98-193

193-242

Thickness 

(feet)

1

20

65

12

95

49

Altitude 

(feet)

1,172-1,171

1,171-1,151

1,151-1,086

1,086-1,074

1,074-979

979-930

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; large cuttings, unoxidized, (till)

Sand and gravel; clay layer 89 to 92 feet

Clay, gray, silty, sandy, pebbly; rock at 107 feet, smaller cuttings than above till interval, 

hard, unoxidized, gravel lens 130 to 134 feet, 147 to 151 feet, 155 to 157 feet, 164 to 

167 feet, 187 to 190 feet, and 191 to 193 feet (till)

Clay, dark-gray, shaley; hard, greasy (Carlile Shale)

Electric log available

112 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N51W27BBBB R

Other identifier: R2-97-12

Site identification number: 455056097023101

Date of construction: 06-18-97

Land surface altitude: 1,222 feet

Total depth: 282 feet

Depth

0-2

2-20

20-24

24-112

112144

144-172

172-216

216-247

247-282

Thickness 

(feet)

2

18

4

88

32

28

44

31

35

Altitude 

(feet)

1,222-1,220

1,220-1.202

1,202-1.198

1,198-1,110

1,110-1,078

1,078-1,050

1,050-1,006

1,006-975

975-940

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; oxidized (till)

Clay, gray, very silty, greasy flake clay inclusion)

Clay, gray, silty, sandy, pebbly; large cuttings, unoxidized (till)

Sand and gravel, coarse sand grading to fine gravel; some coarse gravel and cobbles 

near base of interval

Clay, gray, very silty; greasy (lake clay)

Sand, gray, very fine to fine; unoxidized

Clay, gray, silty, sandy, pebbly; some gravel lens, unoxidized (till)

Clay, dark-gray, shaley; very hard, greasy, noncalcareous (Carlile Shale)

Electric log available

Section A - Geologic Logs 113
Local number: 128N52W1DDDD R

Other identifier: R2-97-15

Site identification number: 455332097061301

Date of construction: 06-25-97

Land surface altitude: 1,204 feet

Total depth: 262 feet

Depth

0-1

1-30

30-74

74-100

100-168

168-208

208-235

235-262

Thickness 

(feet)

1

29

44

26

68

40

27

27

Altitude 

(feet)

1,204-1,203

1,203-1,174

1,174-1,130

1,130-1,104

1,104-1,036

1,036-996

996-969

969-942

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; turns grayish-brown at 10 feet, 

reddish-brown from 17 to 19 feet, oxidized (till)

some

Clay, gray, silty, sandy, pebbly; large cuttings, unoxidized, fine gravel lens from 34 to 

37 feet (till)

Clay, gray, very silty; unoxidized, sand content increased with depth (lake sediment)

Sand, gray, fine; unoxidized

Clay, gray, very silty, sandy; layered, unoxidized (lake sediment)

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, dark-gray, shaley; hard, greasy, noncalcareous, concretion at 237 feet 

Shale)

(Carlile

Electric log available

Local number: 128N52W1DDDD2 R

Other identifier: R2-97-18

Site identification number: 455335097061501

Date of construction: 07-02-97

Land surface altitude: 1,204.2 feet

Total depth: 162 feet

_ .. Thickness Altitude _ . .. 

Depth (feet) (feet) Descnpt.on

0-1

1-30

30-74

74-100

100-162

Well screened from

1

29

44

26

62

152 to

1 ,204.2- 1 ,203 .2 Topsoil, black

1,203.2-1,174.2 Clay, yellowish-brown, silty, sandy, pebbly; turns grayish-brown at 10 feet, some 

reddish-brown from 17 to 19 feet, oxidized (till)

1,174.2-1,130.2 Clay, gray, silty, sandy, pebbly; large soft cuttings, unoxidized (till)

1,130.2-1,104.2 Clay, gray, very silty, unoxidized (lake sediment)

1,104.2-1,042.2 Sand, gray, fine; unoxidized

162 feet; 2-inch PVC casing and screen. For electric log see R2-97-I5

114 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N52W3CCCB R

Other identifier: R2-97-16

Site identification number: 455337097095501

Date of construction: 06-30-97

Land surface altitude: 1,195 feet

Total depth: 242 feet

Depth

0-2

2-30

30-48

48-70

70-112

112-146

146-174

174-211

211-242

Thickness 

(feet)

2

28

18

22

42

34

28

37

31

Altitude 

(feet)

1,195-1,193

1,193-1,165

1,165-1,147

1,147-1,125

1,125-1,083

1,083-1,049

1,049-1,021

1,021-984

984-953

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; turns grayish-brown at 25 feet, 

(till)

oxidized

Clay, gray, silty, sandy, pebbly; unoxidized, gravel lens from 34 to 38 feet and 44 to 48 

feet (till)

Clay, gray, very silty; greasy, unoxidized (lake clay)

Clay, gray, very silty, sandy; sand layers common, unoxidized (lake sediment)

Sand, gray, fine; unoxidized

Silt and sand; alternating layers (lake sediment)

Clay, gray, silty, sandy, pebbly; contains many gravel lens, unoxidized (till)

Clay, dark-gray, shaley; hard greasy, noncalcareous (Carlile Shale)

Electric log available

Local number: 128N52W3CCCB2 R

Other identifier: R2-97-17

Site identification number: 455337097095502

Date of construction: 07-01-97

Land surface altitude: 1,194.8 feet

Total depth: 142 feet

Depth

0-2

2-30

30-44

44-52

52-70

70-112

112-142

Thickness 

(feet)

2

28

14

8

18

42

30

Well screened from 132 to 142

Altitude 

(feet)

1,194.8-1.192.8

1,192.8-1,164.8

1,164.8-1,150.8

1,150.8-1,142.8

1,142.8-1,124.8

1,124.8-1,082.8

1,082.8-1,052.8

Description

Topsoil, black

Clay, yellowish-brown, silty, sandy, pebbly; gravel lens from 6 to 8 feet and 27 to 

29 feet, oxidized (till)

Clay, gray, silty, sandy, pebbly; gravel lens from 34 to

Gravel, fine

Clay, gray, very silty; unoxidized (lake clay)

38 feet, unoxidized (till)

Clay, gray, very silty, sandy; numerous sand layers, unoxidized (lake sediment)

Sand, gray, fine; unoxidized

feet; 2-inch PVC screen and casing. For electric log see R2-97-16

Section A - Geologic Logs 115
Local number: 128N52W27BBBC R

Other identifier: R2-97-20

Site identification number: 455049097095501

Date of construction: 07-08-97

Land surface altitude: 1,213.7 feet

Total depth: 152 feet

DeP(h ,7 7 ZT« Description

0-2 2 1,213.7-1,211.7 Topsoil, black

2-22 20 1,211.7-1,191.7 Clay, yellowish-brown, silty, sandy, pebbly; color change to dark-brown at 14 feet,

oxidized (till)

22-88 66 1,191.7-1,125.7 Clay, gray, silty, sandy, pebbly; unoxidized (till)

88-135 47 1,125.7-1,078.7 Sand and gravel, coarse sand to fine gravel; some coarse gravel, clay layers from 96 to

101 feet

135-152 17 1,078.7-1,061.7 Clay, gray, shaley; hard greasy (Pierre Shale) 

Well screened from 120 to 130 feet; 2-inch PVC casing and screen; 20 feet blank casing below and open to screen

116 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N49W27BACCR

Other identifier: R2-97-34

Site identification number: 455557096470201

Date of construction: 08-05-97

Land surface altitude: 1,068 feet

Total depth: 292 feet

Depth

0-2

2-14

14-20

20-72

72-103

103-142

142-148

148-159

159-214

214-217

217-220

220-228

228-292

Thickness 

(feet)

2

12

6

52

31

39

6

11

55

3

3

8

64

Altitude 

(feet)

1,068-1,066

1,066-1.054

1,054-1,048

1,048-996

996-965

965-926

926-920

920-909

909-854

854-851

851-848

848-840

840-776

Description

Clay, black (topsoil)

Clay, yellowish-brown, tan, and blackish-brown, very silty; some reddish-brown, with 

concretions, layered (lake sediment)

Clay, gray, very silty: greasy, unoxidized (lake sediment)

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Clay, gray, very silty, sandy, unoxidized (lake sediment)

Clay, gray, silty, very sandy, pebbly; hard, some cobbles, fine gravel lens from 

133 feet, unoxidized (till)

Gravel, coarse; with many cobbles

Clay, gray; very hard, greasy, unoxidized (lake sediment)

128 to

Silt grading to fine sand, gray; drills very fast, poor cuttings, unoxidized (lake sediment)

Chert boulder; very hard

Granite boulder; hard

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Clay, dark-gray, silty; greasy, calcareous (Graneros Shale)

Electric log available

Section A - Geologic Logs 117
Local number: 129N49W30CBBB R

Other identifier: R2-97-33

Site identification number: 455543096510701

Date of construction: 08-04-97

Land surface altitude: 1,101 feet

Total depth: 302 feet

Depth

0-3

3-24

24-62

62-76

76-85

85-142

142-193

193-197

197-219

219-225

225-270

270-298

298-302

Thickness 

(feet)

3

21

38

14

9

57

55

4

22

6

45

28

4

Altitude 

(feet)

1,101-1,098

1,098-1,077

1,077-1.039

1,039-1.025

1,025-1.016

1,016-959

959-908

908-904

904-882

882-876

876-831

831-803

803-799

Description

Topsoil, black

Clay, yellowish-brown, silty. sandy, pebbly; oxidized (till)

Clay, gray, silty, sandy, pebbly; soft, large cuttings, unoxidized (till)

Sand, gray, fine, silty; unoxidized

Clay, gray, silty, sandy, pebbly; unoxidized (till)

Sand and gravel, coarse sand to fine gravel; grades to medium gravel with depth, some

coarse

Clay, gray, silty, sandy, pebbly; chert boulder at 150 feet, unoxidized (till)

Gravel, fine to medium

Clay, gray, silty, sandy, pebbly; unoxidized, rock at 198 feet (till)

Gravel, fine

Clay, dark-gray to blackish-brown; hard, greasy, calcareous (Fairport Shale Member - 

Carlile Shale)

Siltstone, white and brown; hard, cherty, very calcareous (Greenhorn Limestone)

Clay, gray, shaley; greasy, hard (Graneros Shale)

Electric log available

118 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Selected Existing Test Holes and Observation Wells in Which the Bedrock was Reached

Local number: 118N52W8AAAD R

Other identifier: R2-85-69

Site identification number: 450250097051001

Date of construction: 7-23-85

Land surface altitude: 1,795 feet

Total depth: 530 feet

Depth

0-1

1-56

56-83

83-104

104-138

138-157

157-185

185-233

233-254

254-337

337-341

341-359

359-368

368-413

413-465

465-530

Electric log

Thickness 

(feet)

1

55

27

21

34

19

28

48

21

83

4

18

9

45

52

65

available

Altitude 

(feet)

1,795-1,794

1,794-1,739

1,739-1,712

1,712-1,691

1,691-1,657

1,657-1,638

1,638-1,610

1,610-1,562

1,562-1,541

1,541-1,458

1,458-1,454

1,454-1,436

1,436-1,427

1,427-1,382

1,382-1,330

1,330-1,265

Description

Topsoil, black

Clay, tan to brown, sandy, silty, pebbly (till)

Clay, gray, sandy, silty, pebbly (till)

Clay. tan. sandy, silty, pebbly (till)

Clay, tan, sandy, silty, pebbly (till)

Clay, gray, sandy, silty, pebbly (till)

Clay, gray, very sandy, silty, pebbly, (till)

Clay, gray, sandy, silty, pebbly (till)

Clay, tan, silty, sandy, pebbly; some thin sand stringers (till)

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel

Clay, gray, sandy, silty, pebbly (till)

Gravel, fine; coarse sand; oxidized

Clay, gray, silty, sandy, pebbly, very sandy from 395 to 404 feet (till)

Sand and gravel, gray, medium sand to fine gravel; clay stringer from 432 to 437 feet 

(Altamont aquifer?)

Shale, dark-gray; greasy; bentonite (Pierre Shale)

Section A - Geologic Logs 119
Local number: 118N52W21AAAA

Other identifier: Rl-85-61

Site identification number: 450113097032401

Date of construction: 7-22-85

Land surface altitude: 1,810 feet

Total depth: 560 feet

Depth

0-1

1-3

3-19

19-34

34-47

47-91

91-142

142-152

152-162

162-175

175-177

177-181

181-185

185-191

191-244

244-276

276-278

278-314

314-398

398-407

407-461

461-471

471-560

Electric log

Thickness 

(feet)

1

2

16

15

13

44

51

10

10

13

2

4

4

6

53

32

2

36

84

9

54

10

89

Altitude _ . . 

(feet) Descr,pt,on

1 ,8 10- 1 .809 Topsoil, black

1 ,809- 1 ,807 Sand and gravel, brown, medium sand to fine gravel

1 ,807- 1 ,79 1 Clay, tan to brown, silty, sandy, pebbly (till)

1,791-1,776 Clay, gray, very silty, sandy, pebbly (till)

1,776-1,763 Clay, light-gray, very silty; calcareous (lake sediments?)

1,763-1,719 Clay, brown, sandy, silty, pebbly (till)

1,719-1,668 Clay, brown and gray mixed, sandy, silty, pebbly (till)

1,668-1,658 Clay, gray, very sandy, silty, pebbly (till)

1,658-1,648 Sand and gravel, medium sand to fine gravel; possibly oxidized

1,648-1,635 Sand and gravel, medium sand to fine gravel, clayey

1 ,635- 1 ,633 Clay, gray, silty, sandy, pebbly (till)

1,633-1,629 Sand and gravel

1 ,629- 1 ,625 Clay, gray, silty, sandy, pebbly (till)

1,625-1,619 Sand and gravel

1,619-1,566 Clay, gray, silty, sandy, pebbly (till)

1,566-1,534 Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till)

1,534-1,532 Sand and gravel

1,532-1,496 Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till)

1,496-1,412 Clay, gray, silty, sandy, pebbly (till)

1 ,4 1 2- 1 .403 Sand, fine to coarse; some fine gravel

1,403-1,349 Clay, gray, very sandy, silty, pebbly; many sand stringers (till?)

1 ,349- 1 ,339 Sand, clayey

1 ,339- 1 ,250 Shale, dark-gray; greasy, brittle (Pierre Shale)

available. Clay interval from 407 to 461 feet may be a very clay rich sand (Altamont aquifer equivalent?)

120 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 118N53W36DDDD

Other identifier: R2-85-68

Site identification number: 445837097073502

Date of construction: 7-22-85

Land surface altitude: 1,745 feet

Total depth: 540 feet

Depth

0-1

1-11

11-17

17-21

21-30

30-129

129-139

139-224

224-244

244-269

269-293

293-296

296-332

332-394

394-540

Thickness 

(feet)

1

10

6

4

9

99

10

85

20

25

24

3

36

62

146

Altitude 

(feet)

1,745-1,744

1,744-1,734

1,734-1,728

1,728-1,724

1,724-1,715

1,715-1,616

1,616-1,606

1,606-1,521

1,521-1,501

1,501-1,476

1,476-1,452

1,452-1,449

1,449-1,413

1,413-1,351

1,351-1,205

Description

Topsoil, black

Sand and gravel, tan, medium sand to fine gravel

Clay, tan, sandy, silty, pebbly (till)

Clay, gray, sandy, silty, pebbly (till)

Sand and gravel

Clay, gray, very sandy, silty, pebbly; some stringers of sand (till)

Sand and gravel

Clay, gray, sandy, silty, pebbly (till)

Clay, tan(?), sandy, silty, pebbly (till)

Clay, gray, very sandy, silty, pebbly (till)

Clay, gray, sandy, silty, pebbly (till)

Sand and gravel

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel, clay, clayey (Altamont aquifer?)

Shale, dark-gray; hard, brittle greasy (Pierre Shale)

Well screened from 357 to 372 feet; 2-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 121
Local number: 119N52W8AAAAR

Other identifier: Rl-85-62

Site identification number: 450627097110701

Date of construction: 7-23-85

Land surface altitude: 1,818 feet

Total depth: 530 feet

Depth

0-1

1-38

38-54

54-89

89-118

118-147

147-160

160-189

189-228

228-275

275-281

281-291

291-298

298-358

358-386

386-530

Well screened

Thickness 

(feet)

1

37

16

35

29

29

13

29

39

47

6

10

7

60

28

144

from 372 to 387

Altitude 

(feet)

1,818-1,817

1,817-1,780

1,780-1,764

1,764-1,729

1,729-1,700

1,700-1,671

1,671-1,658

1,658-1,629

1,629-1,590

1,590-1,543

1,543-1,537

1,537-1,527

1,527-1,520

1,520-1,460

1,460-1,432

1,432-1,288

Description

Topsoil, black

Clay, yellow brown, sandy, silty, pebbly; soft (till)

Clay, tan to brownish-gray, sandy, silty, pebbly; soft (till)

Silts, light-brown to light-gray, clayey; some fine sand; some greenish silts; upper 

portion appears oxidized (lake sediments)

Clay, tan to orangish-tan, very sandy, silty, pebbly; sand stringers(?) (till)

Clay, light-gray to gray, sandy, silty, pebbly; some brownish-clays (till)

Silt, medium-gray to black; greasy, noncalcareous (lake silts)

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; hard (till)

Clay, brown, silty, sandy, pebbly (till)

Sand and gravel, medium sand to fine gravel; oxidized(?)

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till)

Sand and gravel, fine sand to fine gravel; some yellow brown clay in upper portion

Claystone, dark-gray to black; brittle, greasy (Pierre Shale) <

feet; 2-inch PVC screen and casing. Electric log available

122 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 120N51W9BBBCR

Other identifier: RB-86-104

Site identification number: 451140097034101

Date of construction: 10-28-86

Land surface altitude: 1,940 feet

Total depth: 652 feet

Depth

0-1

1-23

23-69

69-78

78-135

135-190

190-286

286-306

306-396

396-408

408-470

470-486

486-606

606-614

614-652

Thickness 

(feet)

1

22

46

9

57

55

96

20

90

12

62

16

120

8

38

Altitude _ . . 

(feet) Descr.pt.on

1 ,940- 1 ,939 Topsoil, black

1 ,939- 1 ,9 1 7 Clay, yellow brown, silty, sandy, pebbly (till)

1 ,9 1 7- 1 ,87 1 Clay, gray, silty, sandy, pebbly (till)

1 ,87 1 - 1 ,862 Clay, dark-brown to medium gray, silty

1 ,862- 1 ,805 Clay, yellow brown, silty, sandy, pebbly (till)

1,805-1,750 Clay, gray, silty, sandy, pebbly; sand content increases with depth (till)

1,750-1,654 Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till)

1,654-1,634 Clay, grayish-brown, silty, sandy, pebbly (till)

1,634-1,544 Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till)

1 ,544- 1 ,532 Sand and gravel

1 ,532- 1 ,470 Clay, gray, silty, sandy, pebbly, shaley (till)

1 ,470- 1 ,454 Sand and gravel

1,454-1,334 Clay, dark-gray, silty, sandy, pebbly, shaley (till)

1 ,334- 1 ,326 Sand and gravel

1 ,326- 1 ,288 Shale, dark-gray; greasy (Pierre Shale)

Electric log available

Section A - Geologic Logs 123
Local number: 120N51W17DDDD

Other identifier: R2-87-27

Site identification number: 451140096575301

Date of construction: 6-30-87

Land surface altitude: 1,915 feet

Total depth: 745 feet

Depth

0-1

1-49

49-62

62-73

73-154

154-179

179-230

230-368

368-378

378-386

386-454

454-528

528-585

585-682

682-693

693-745

Thickness 

(feet)

1

48

13

11

81

25

51

138

10

8

68

74

57

97

11

52

Altitude 

(teet)

1,915-1,914

1,914-1,866

1,866-1.853

1,853-1,842

1,842-1,761

1,761-1,736

1,736-1,685

1,685-1,547

1,547-1,537

1,537-1,529

1,529-1,461

1,461-1,387

1,387-1,330

1,330-1,233

1,233-1,222

1,222-1,170

Description

Topsoil, black

Sand and gravel, tan, medium sand to fine gravel coarse gravel common below 30 feet

Clay, tannish-gray, silty, sandy, pebbly (till)

Clay, dark-gray, silty, sandy, pebbly(?); strong gamma-kick, possibly organic (lacustrine 

sediments?)

Clay, gray, silty, sandy, pebbly; sand content higher between 97 and 130 feet; some sand 

stringers (till)

Clay, yellow brown to tan, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; minor sand and gravel stringers; strong gamma-kick at 

base may indicate primary or incorporated ash(?) (till)

Clay, gray, silty, sandy, pebbly; many sand and gravel stringers, particularly between 

230 and 252 feet and 352 and 368 feet (till)

Clay, light-gray, sandy (lacustrine)

Clay, light-tray (lacustrine)

Clay, gray, silty, sandy, pebbly, shaley (till)

Clay, dark-grayish-brown, silty, sandy, shaley; sand and gravel from 497 to 504 feet 

(till)

Clay, gray, silty, sandy, pebbly, shaley (till)

Clay, dark-gray, silty, sandy, pebbly, shaley; sand and gravel between 624 and 635 feet

Sand and gravel

Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

Electric log available. Interval from 73 to 130 feet may be three separate drift units. Several of the lower drift units were separated based 

on the geophysical log

124 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 120N52W8AAAB R

Other identifier: R2-86-107

Site identification number: 451138097111301

Date of construction: 11 -4-86

Land surface altitude: 1,850 feet

Total depth: 516 feet

Depth

0-2

2-31

31-57

57-67

67-115

115-147

147-224

224-282

282-293

293-310

310-424

424-482

482-516

Thickness 

(feet)

2

29

26

10

48

32

77

58

11

17

114

58

34

Altitude 

(feet)

1,850-1,848

1,848-1,819

1,819-1,793

1,793-1,783

1,783-1,735

1,735-1,703

1,703-1,626

1,626-1.568

1,568-1,557

1,557-1,540

1,540-1,426

1,426-1,368

1,368-1,334

Description

Topsoil, black

Clay, yellow brown to brown, very silty, sandy pebbly (till)

Clay, gray, very silty, sandy, pebbly (till)

Clay, grayish-green to olive, silty; noncalcareous (lacustrine?)

Clay, yellow brown to tan, silty, sandy, pebbly; scattered sand stringers (till)

Sand and gravel, yellow brown to gray, medium sand to fine gravel; yellow brown clay 

layers in upper half, gray layers in lower portion

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel, gray, medium to coarse sand, some fine gravel; scattered gray clay 

layers, mostly in lower half

Clay, light-gray to tan, silty

Clay, yellow brown, silty, sandy, pebbly; a few sand stringers (till)

Clay, gray, silty, sandy, pebbly (till)

Sand, gray

Shale, dark-gray; greasy (Pierre Shale)

Electric log available

Section A - Geologic Logs 125
Local number: 120N52W11AAAA R

Other identifier: R2-88-19

Site identification number: 451143097072501

Date of construction: 7-26-88

Land surface altitude: 1,835 feet

Total depth: 527 feet

Depth

0-1

1-27

27-34

34-39

39-75

75-102

102-143

143-161

161-181

181-238

238-289

289-295

295-337

337-354

354-438

438-481

481-527

Thickness 

(feet)

1

26

7

5

36

27

41

18

20

57

51

6

42

17

84

43

46

Altitude 

(feet) Descr,pt,on

1 ,835- 1 ,834 Topsoil, yellow brown, silty

1 ,834- 1 ,808 Sand and gravel, medium sand to medium gravel; oxidized

1,808-1,801 Clay, gray, silty, sandy, pebbly (till)

1,801-1,796 Sand and gravel, coarse sand and fine gravel

1,796-1,760 Clay, yellow brown silty, sandy, pebbly (till)

1,760-1,733 Clay, brownish-gray to gray, silty, sandy, pebbly (till)

1,733-1 ,692 Sand and gravel, medium sand to medium gravel; oxidized; some yellow brown till

stringers

1,692-1,674 Clay, gray, silty, sandy, pebbly (till)

1 ,674- 1 ,654 Gravel, medium to coarse; some sand

1,654-1,597 Clay, gray, very silty, sandy, pebbly; clayey sands from 213 to 219 feet and 225 to 

238 feet (till?)

1 ,597- 1 ,546 Clay, gray, silty, sandy, pebbly (till)

1,546-1,540 Sand and gravel

1,540-1,498 Clay, yellow brown to brown, silty, sandy, pebbly (till)

1,498-1,481 Clay, gray, silty, sandy, pebbly; sand stringers (till)

1 ,48 1 - 1 ,397 Clay, gray, silty, sandy, pebbly (till)

1,397-1,354 Sand, gray, medium; some fine gravel

1,354-1,308 Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

Electric log available

126 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 121N47W4AAAA

Other identifier: R2-88-25

Site identification number: 451935096343201

Date of construction: 9-7-88

Land surface altitude: 1,110 feet

Total depth: 270 feet

Depth

0-3

3-18

18-43

43-45

45-67

67-73

73-115

115-120

120-145

145-205

205-250

Thickness 

(feet)

3

15

25

2

22

6

42

5

25

60

45

Altitude 

(feet)

1,110-1.107

1,107-1,092

1,092-1,067

1,067-1,065

1,065-1,043

1,043-1,037

1,037-995

995-990

990-965

965-905

905-860

Description

Topsoil, black

Clay, tan to light-brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Gravel, coarse

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel

Clay, reddish-brown, sandy, silty, pebbly (till)

Sand

Clay, dark-gray, silty, sandy, pebbly (till)

Sand, gray, fine to medium

Siltstone, dark-brown with tan specks; calcareous (Fairport Shale Member - Carlile

Shale)

250-270 20 860-840 Siltstone, dark-brown with tan specks; calcareous; crystalline carbonate layers;

fractured (Greenhorn Limestone)

Encountered standard till sequence (New Ulm through Whetstone). Greenhorn Limestone is apparently fractured as a result of movement 

along Morris Fault. Lost circulation at depth of 270 feet. Plugged and abandoned hole

Section A - Geologic Logs 127
Local number: 121N48W3BBCC

Other identifier: R2-87-20

Site identification number: 451928096404001

Date of construction: 5-28-87

Land surface altitude: 1,150 feet

Total depth: 319 feet

Depth

0-1

1-12

12-32

32-58

58-89

89-124

124-261

261-318

318-319

Thickness 

(feet)

1

11

20

26

31

35

137

57

1

Altitude 

(feet)

1,150-1,149

1,149-1,138

1,138-1,118

1,118-1,092

1,092-1,061

1,061-1,026

1,026-889

889-832

832-831

Description

Topsoil black

Clay, yellow brown to tan, silty, sandy, pebbly; sand stringers (till - New Ulm?)

Clay, yellow brown, silty, sandy, pebbly; some carbonate gravels (till - Granite Falls?)

Clay, gray, silty, sandy, pebbly; some carbonate gravels (till - Granite Falls?)

Clay, reddish-brown to reddish-gray, sandy, silty, pebbly (till - Hawk Creek?)

Clay, dark-gray, silty, sandy, pebbly (till - Whetstone?)

Shale, dark-gray; greasy, noncalcareous; scattered mica rich sand intervals (Blue Hill 

Member - Carlile Shale)

Shale, dark-brown with tan specks; calcareous (Fairport Shale Member - Carlile Shale)

Limestone, gray; dirty (Greenhorn Limestone)

Electric log available

Local number: 121N48W6AAAA

Other identifier: R2-86-83

Site identification number: 451935096430901

Date of construction: 9-11-86

Land surface altitude: 1,140 feet

Total depth: 360 feet

Depth

0-7

7-42

42-46

46-54

54-274

274-331

331-360

Thickness 

(feet)

7

35

4

8

220

57

29

Aititude 

(feet)

1,140-1,133

1,133-1,098

1,098-1,094

1,094-1,086

1,086-866

866-809

809-780

Description

Clay, yellow brown and gray, silty, sandy, pebbly (till - New Ulm or Granite Falls)

Clay, reddish-brown, sandy, silty, pebbly; many sand stringers (till - Hawk Creek)

Clay, gray, silty, sandy, pebbly (till - Whetstone)

Clay, dark-brownish-gray, silty; greasy, noncalcareous; organic looking (Carlile Shale?)

Shale, dark-gray; greasy, noncalcareous; scattered fine sand partings (Blue Hill Shale 

Member - Carlile Shale)

Shale, dark-brown with tan specks; calcareous (Fairport Shale Member - Carlile Shale)

Limestone, dark-brownish-gray; dirty; some dark-brown calcareous shale (Greenhorn 

Limestone)

Electric log available

128 Hydroiogic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County investigation
Local number: 121N49W3BBBC

Other identifier: R1-82-47

Site identification number: 451927096480201

Date of construction: 5-18-82

Land surface altitude: 1,195 feet

Total depth: 155 feet

Depth

0-2

2-13

13-21

21-55

55-66

66-145

145-155

Thickness 

(feet)

2

11

8

34

11

79

10

Altitude 

(feet)

1,195-1,193

1,193-1,182

1,182-1,174

1,174-1,140

1,140-1,129

1,129-1,050

1,050-1,040

Description

Topsoil

Clay, brown, silty, pebbly (till)

Sand, medium to coarse

Clay, gray, silty, pebbly (till)

Clay, olive, silty, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, gray (shale)

Local number: 121N50W1BBBB

Other identifier: R2-86-77

Site identification number: 451944096525701

Date of construction: 8-29-86

Land surface altitude: 1,305 feet

Total depth: 500 feet

Depth

0-2

2-17

17-22

22-43

43-65

65-83

83-116

116-152

152-190

190-290

290-464

464-500

Thickness 

(feet)

2

15

5

21

22

18

33

36

38

100

174

36

Altitude 

(feet)

1,305-1,303

1,303-1,288

1,288-1,283

1,283-1,262

1,262-1,240

1,240-1,222

1,222-1,189

1,189-1,153

1,153-1,115

1,115-1,015

1,015-841

841-805

Description

Topsoil, black

Clay, yellow brown to tan, silty, sandy, pebbly (till)

Clay, dark-brown, silty; noncalcareous; brittle (lacustrine or shale block?)

Clay, yellow brown to brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, yellow brown, silty, sandy, pebbly; several sand and gravel stringers (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; sand stringers (till)

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel, gray; scattered clay layers (Revillo aquifer?)

Shale, dark-blue gray; greasy, noncalcareous; scattered fine sand partings (Blue Hill 

Shale Member - Carlile Shale)

Shale, dark-brown with tan specks; calcareous (Fairport Shale Member - Carlile Shale)

Electric log available

Section A - Geologic Logs 129
Local number: 121N50W5BBBB

Other identifier: R2-87-44

Site identification number: 451935096575101

Date of construction: 7-30-87

Land surface altitude: 1,700 feet

Total depth: 785 feet

Depth

0-2

2-24

24-55

55-105

105-142

142-159

159-187

187-214

214-301

301-335

335-419

419-488

488-574

574-661

661-673

673-692

692-785

Thickness 

(feet)

2

22

31

50

37

17

28

27

87

34

84

69

86

87

12

19

93

Altitude _ . .. 

(feet) Descr,pt,on

1 ,700- 1 ,698 Topsoil, black

1 ,698- 1 ,676 Clay, yellow brown, silty, sandy, pebbly (till)

1 ,676- 1 ,645 Clay, gray, silty, sandy, pebbly (till)

1,645-1,595 Clay, gray, sandy, silty, pebbly; many sand stringers (till)

1,595-1,558 Clay, gray, silty, sandy, pebbly (till)

1,558-1,541 Clay, gray, silty, sandy, pebbly; many sand and gravel stringers (till?)

1,541-1,513 Clay, grayish-brown, silty, sandy, pebbly (till)

1,5 13-1,486 Clay, brownish-gray to gray, silty, sandy, pebbly (till)

1,486-1,399 Clay, gray, silty, sandy, pebbly; sandier below 262 feet (till)

1 ,399- 1 ,365 Sand and gravel, medium and to fine gravel; scattered clay layers

1,365-1,281 Clay, gray, silty, sandy, pebbly, several sand and gravel stringers between 410 and 

419 feet (till)

1,281-1,212 Clay, gray, silty, sandy, pebbly, shaley; darker than previous interval (till)

1,212-1,126 Clay, gray, silty, sandy, pebbly, shaley; quite sandy from 517 to 532 feet and 566 to 

574 feet (till)

1 , 1 26- 1 ,039 Clay, gray, silty, sandy, pebbly, shaley (till)

1 ,039- 1 ,027 Sand and gravel(?), clayey

1 ,027- 1 ,008 Shale, gray; greasy, noncalcareous (Carlile Shale?)

1,008-915 Shale, gray; greasy, noncalcareous; a few fine sand partings (Blue Hill Shale Member - 

Carlile Shale)

Electric log available

130 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 121N51W14DADB

Other identifier: R2-86-85

Site identification number: 451720097002801

Date of construction: 9-18-86

Land surface altitude: 1,990 feet

Total depth: 585 feet

Depth

0-1

1-33

33-85

85-125

125-170

170-223

223-236

236-255

255-269

269-301

301-313

313-388

388-436

436-493

493-515

515-562

562-574

574-585

Thickness 

(feet)

1

32

52

40

45

53

13

19

14

32

12

75

48

57

22

47

12

11

Altitude 

(feet) Descr,pt,on

1 ,990- 1 ,989 Topsoil, black

1,989-1,957 Clay, yellow brown, sandy, silty, pebbly; many sand and gravel stringers (till)

1,957-1,905 Clay, gray, sandy, silty, pebbly; many sand and gravel stringers; sand and gravel 

between 42 and 49 feet (till)

1,905-1,865 Clay, yellow brown to tan, silty, sandy, pebbly; numerous sand and gravel stringers (till)

1,865-1,820 Clay, medium-gray, silty, sandy, pebbly; many sand and gravel stringers (till)

1 ,820- 1 ,767 Clay, gray, silty, sandy, pebbly (till)

1,767-1,754 Clay, yellow brown, silty, sandy, pebbly (till)

1,754-1,735 Clay, gray, silty, sandy, pebbly; a few sand stringers (till)

1,735-1,721 Clay, yellow brown, sandy, silty, pebbly (till)

1 ,721-1.789 Clay, gray, sandy, silty, pebbly (till)

1,789-1,777 Sand and gravel, medium sand to medium gravel; a few clay layers

1,777-1,602 Clay, gray, silty, sandy, pebbly; may be partially oxidized from 313 to about 340 feet 

(till)

1,602-1,554 Clay, light-gray, silty, sandy, pebbly; soft, greasy; a few sand stringers (till)

1 ,554- 1 ,497 Clay, gray, silty, sandy, pebbly (till)

1,497-1,475 Clay, olive gray, silty, sandy, pebbly; a few sand stringers (till)

1,475-1,428 Clay, gray, silty, sandy, pebbly; a few sand stringers (till)

1,428-1,416 Sand and gravel, clayey

1,416-1,405 Shale, dark-gray; greasy, noncalcareous; inoceramus fragments (Pierre Shale)

Electric log available

Section A - Geologic Logs 131
Local number: 121N51W17AAAAR

Other identifier: R2-86-103

Site identification number: 451603097034201

Date of construction: 10-22-86

Land surface altitude: 2,030 feet

Total depth: 758 feet

Depth

0-1

1-42

42-100

100-185

185-239

239-295

295-347

347-364

364-399

399-423

423-465

465-503

503-601

601-701

701-739

739-758

Electric log

Thickness 

(feet)

1

41

58

85

54

56

52

17

35

24

42

38

98

100

38

19

available

Altitude

(feet)

2,030-2,029

2,029-1,988

1,988-1,930

1,930-1,845

1,845-1,791

1,791-1,735

1,735-1,683

1,683-1,666

1,666-1,631

1,631-1,607

1,607-1,565

1,565-1,527

1,527-1,429

1,429-1,329

1,329-1,291

1,291-1,272

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly; minor sand and gravel (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, gray, very silty, sandy, pebbly (till)

Clay, yellow brown silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; a few sand and gravel stringers below 270 feet (till)

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel; minor clay layers

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel, clayey

Clay, brown, silty, sandy, pebbly; shaley; scattered sand and gravel intervals (till)

Clay, gray, silty, sandy, pebbly, shaley; scattered sand and gravel intervals (till)

Clay, dark-gray, silty, sandy, pebbly, shaley; scattered sand intervals (till)

Clay, dark-gray, silty, sandy, pebbly, shaley (till)

Sand and gravel

Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

132 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 121N51W35CDDD

Other identifier: Rl-87-53

Site identification number: 451427097010101

Date of construction: 7-24-87

Land surface altitude: 1,955 feet

Total depth: 860 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-1 1 1,955-1,954 Topsoil, tan, sandy

1-26 25 1,954-1,929 Sand and gravel, brown, medium sand to medium gravel; numerous clay stringers

26-48 22 1,929-1,907 Clay, yellow brown to brown, sandy, silty, pebbly (till)

48-65 17 1,907-1,890 Sand and gravel, lower portion clayey

65-113 48 1,890-1,842 Clay, dark-gray, silty, sandy, pebbly (till)

113-117 4 1,842-1,838 Sand and gravel

117-169 52 1,838-1,786 Clay, gray, silty, sandy, pebbly (till)

169-212 43 1,786-1,743 Clay, yellow brown to brown, silty, sandy, pebbly (till)

212-233 21 1,743-1,722 Sand and gravel, lower portion clayey

233-242 9 1,722-1,713 Clay, brown, silty, sandy, pebbly (till)

242-350 108 1,713-1,605 Clay, gray, silty, sandy, pebbly (till)

350-378 28 1,605-1,577 Sand and gravel, clayey

378-407 29 1,577-1,548 Clay, yellow brown(?), silty, sandy, pebbly (till)

407-453 46 1,548-1,502 Clay, gray, sandy, silty, pebbly (till)

453-537 84 1,502-1,418 Clay, gray, silty, sandy, pebbly (till)

537-542 5 1,418-1,413 Sand

542-610 68 1,413-1,345 Clay, gray, silty, sandy, pebbly (till)

610-614 4 1,345-1,341 Sand and gravel, medium sand to medium gravel

614-680 66 1,341-1,275 Clay, gray, silty, sandy, pebbly (till)

680-715 35 1,275-1,240 Clay, brownish-gray, silty, sandy pebbly (till)

715-722 7 1,240-1,233 Sand, brown

722-820 98 1,233-1,135 Clay, gray, silty, sandy, pebbly (till)

820-860 40 1,135-1,095 Shale(?)

Electric log available. Lithologic breaks to 551 feet were called using the geophysical log. Below 551 feet they are based on the driller's 

logs. Nature of the shale, Pierre Shale or Carlile Shale, is uncertain, but it is probably Carlile Shale

Section A - Geologic Logs 133
Local number: 121N52W2AAAA R

Other identifier: R1-87-37

Site identification number: 451748097072501

Date of construction: 6-11 -87

Land surface altitude: 1,890 feet

Total depth: 560 feet

Depth

0-2

2-15

15-27

27-63

63-81

81-94

94-144

144-166

166-194

194-225

225-280

280-332

332-345

345-392

392-473

473-528

528-560

Thickness 

(feet)

2

13

12

36

18

13

50

22

28

31

55

52

13

47

81

55

32

Aititude (feet) Descr,pt,on

1 ,890- 1,888 Topsoil, black, sandy

1,888-1,875 Gravel, brown, fine to medium; some sand

1,875-1,863 Clay, yellow brown, silty, sandy, pebbly (till)

1 ,863- 1 ,827 Clay, gray, silty, sandy, pebbly (till)

1,827-1,809 Clay, olive green, silty; minor sand

1 ,809- 1 ,796 Clay, yellow brown, silty, sandy, pebbly (till)

1,796-1,746 Clay, gray, silty, sandy, pebbly, sandy near base (till)

1,746-1,724 Sand and gravel, coarse sand to medium gravel

1,724-1,696 Clay, yellow brown, sandy, silty, pebbly; scattered sand stringers (till)

1,696-1,665 Clay, yellow brown, silty, sandy, pebbly (till)

1,665-1,610 Clay, gray, silty, sandy, pebbly; some sand stringers (till)

1,610-1,558 Clay, gray, silty, sandy, pebbly (till)

1,558-1.545 Clay, gray, silty, sandy, pebbly; grading to clayey sand

1,545-1,498 Clay, yellow brown to gray, silty, sandy, pebbly (till)

1,498-1.417 Clay, gray, silty, sandy, pebbly; sand and gravel abundant between 423 and 435 feet 

(till)

1,417-1,362 Sand and gravel, gray, medium sand to fine gravel; several clayey zones; grades to 

medium gravel at base

1,362-1,330 Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

Electric log available

134 Hydroiogic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County investigation
Local number: 121N52W9CDDD R

Other identifier: R2-86-106

Site identification number: 451607097103001

Date of construction: 10-30-86

Land surface altitude: 1,852 feet

Total depth: 510 feet

Depth

0-1

1-22

22-52

52-65

65-120

120-127

127-147

147-212

212-280

280-297

297-349

349-369

369-401

401-434

434-493

493-510

Thickness 

(feet)

1

21

30

13

55

7

20

65

68

17

52

20

32

33

59

17

Altitude 

(feet)

1,852-1,851

1,851-1,830

1,830-1,800

1,800-1,787

1,787-1,732

1,732-1,725

1,725-1,705

1,705-1.640

1,640-1,572

1,572-1,555

1,555-1,503

1,503-1,483

1,483-1,451

1,451-1,418

1,418-1,359

1,359-1,342

Well screened from 500 to 5 10 feet; 2-inch PVC

Description

Topsoil, black

Clay, yellow brown, very silty, sandy, pebbly; soft (till)

Clay, dark-brown to gray, very silty, sandy, pebbly; soft (till)

Sand, gray, medium to coarse; some gravel

Silt, gray, clayey; only minor sand and pebbles; some interbedded sands

Silt, black to purplish-brown to green, clayey; a strong gamma kick in 

suggests a possible ash layer

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, gray, sandy, silty, pebbly; a few sand and gravel stringers below

Clay, yellow brown to brown, silty, sandy, pebbly (till)

this segment

259 feet (till)

Clay, gray, silty, sandy, pebbly: sandier interval or clayey sands from 336 to 349 feet 

(till)

Clay, dark-brown to gray, silty, sandy, pebbly, shaley(?) (till)

Clay, dark-gray, silty, sandy, pebbly, shaley(?) (till)

Clay, dark-gray, silty, sandy, pebbly, shaley(?) (till)

Sand, brown to gray, medium; minor clay intervals throughout

Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

screen and casing. Electric log available

Section A - Geologic Logs 135
Local number: 121N52W18BBBB R

Other identifier: R-65

Site identification number: 451605097133101

Date of construction: 8-12-70

Land surface altitude: 1,873 feet

Total depth: 530 feet

Depth

0-27

27-39

39-63

63-65

65-96

96-124

124-128

128-245

245-288

288-312

312-497

497-505

505-530

Thickness 

(feet)

27

12

24

2

31

28

4

117

43

24

185

8

25

Altitude 

(feet)

1,873-1,846

1,846-1,834

1,834-1,810

1,810-1,808

1,808-1,777

1,777-1,749

1,749-1,745

1,745-1,628

1,628-1,585

1.585-1,561

1,561-1,376

1,376-1,368

1,368-1,343

Description

Till, brown

Till gray

Silt and sand, light-gray to light-brownish bray: possibly oxidized silt or till

Gravel

Till, yellowish-brown; iron staining

Gravel; and silty layers, yellowish-brown

Clay, light-gray, silty, sandy; fat, calcareous

Till, gray to brown; rocks from 227 to 229, 231 to 233, 

gravelly from 233 to 235 feet

Till, light-brown

Sand and gravel; rocks

and 244 to 245 feet; rocky and

Till, brown and gray; some dark-clay in samples from 420 to 440 feet

Gravel

Shale

Electric log available

136 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 121N52W25BBBB R

Other identifier: R1-87-35

Site identification number: 451420097072301

Date of construction: 6-9-87

Land surface altitude: 1,915 feet

Total depth: 725 feet

Depth

0-2

2-41

41-87

87-93

93-138

138-154

154-162

162-189

189-275

275-306

306-358

358-413

413-475

475-564

564-696

696-725

Thickness 

(feet)

2

39

46

6

45

16

8

27

86

31

52

55

62

89

132

29

Altitude 

(feet)

1,915-1,913

1,913-1,874

1,874-1,828

1,828-1,822

1,822-1,777

1,777-1,761

1,761-1,753

1,753-1,726

1,726-1,640

1,640-1,609

1,609-1,557

1,557-1,502

1,502-1,440

1,440-1,351

1,351-1.219

1,219-1,190

Description

Topsoil, black

Clay, yellow brown to tan, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; sand and gravel from 58 to 60 feet (till)

Sand and gravel

Clay, brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Sand and gravel, clayey

Clay, gray, silty, sandy, pebbly (till)

Clay, gray, sandy, silty, pebbly; many thin sand and gravel stringers (till)

Sand and gravel, coarse sand to medium gravel; possibly some oxidized till

Clay, gray, silty, sandy, pebbly, grading to very sandy below 346 feet (till)

Clay, gray, silty, sandy, pebbly, grades to very sandy below 399 feet; there is a gamma 

spike at the top of the interval, possibly indicating an ashy layer (till)

Clay, dark-brown, silty, sandy, pebbly; a few sand stringers (till)

Clay, dark-grown to gray, silty, sandy, pebbly; a few sand stringers below 535 feet (till)

Sand and gravel, gray, medium sand to fine gravel, generally clayey; possibly 

interbedded gray till units

Shale, dark-gray; greasy, noncalcareous, inoceramus fragments (Pierre Shale)

Electric log available

Section A - Geologic Logs 137
Local number: 121N53W1AAAA R

Other identifier: R2-87-25

Site identification number: 451750097133501

Date of construction: 6-9-87

Land surface altitude: 1,915 feet

Total depth: 545 feet

Depth

0-3

3-26

26-71

71-155

155-185

185-222

222-309

309-373

373-416

416-449

449-479

479-545

Thickness 

(feet)

3

23

45

84

30

37

87

64

43

33

30

66

Altitude 

(feet)

1,915-1,912

1,912-1,889

1,889-1,844

1,844-1,760

1,760-1,730

1,730-1,693

1,693-1,606

1,606-1,542

1,542-1,499

1,499-1,466

1,466-1,436

1,436-1,370

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, dark-yellow brown to gray, silty, sandy, pebbly

Clay, yellow brown, silty, sandy, pebbly; sand and gravel stringers common; sand 

content increases below 96 feet (till)

Clay, gray, silty, sandy, pebbly (till)

Clay, tan brown, silty, sandy, pebbly (till)

Clay, brown to gray(?), sandy, silty, pebbly; numerous sand and gravel intervals; very 

sandy below 259 feet (till)

Clay, tan, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly (till)

Sand, gray, medium; scattered clay layers

Sand, gray, medium, shaley(?); some shale blocks included

Shale, dark-gray; greasy, noncalcareous (Pierre Shale) ;

Electric log available. Increase in general sand content at 96 feet in the 71- to 155-foot interval may mark a different drift unit. Very 

sandy till between 259 and 309 feet may be a clayey sand instead '

138 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 121N53W24DDDD R

Other identifier: R1-87-36

Site identification number: 451423097174501

Date of construction: 6-10-87

Land surface altitude: 1,855 feet

Total depth: 515 feet

Depth

0-2

2-9

9-31

31-42

42-82

82-133

133-190

190-203

203-213

213-245

245-294

294-304

304-329

329-381

381-420

420-480

480-515

Thickness 

(feet)

2

7

22

11

40

51

57

13

10

32

49

10

25

52

39

60

35

Altitude 

(feet) Descr.pt.on

L ,855- 1 .853 Topsoil, black

1,853- 1 ,846 Clay, yellow brown, sandy, silty, pebbly (till)

1,846-1,824 Sand, brown to gray, medium to coarse; some gravel; clay stringers

1,824-1,813 Clay, gray, silty, sandy, pebbly (till)

1,813-1,773 Clay, yellow brown to tan, silty, sandy, pebbly (till)

1,773-1,722 Clay, gray, silty, sandy, pebbly; possible increase in clay content at 113 feet (till)

1,722-1,665 Clay, medium-gray, silty, sandy, pebbly; some oxidized clay (till)

1 ,665- 1 ,652 Sand and gravel, gray; interbedded clay

1,652-1,642 Clay, gray, silty; minor sand

1,642-1,610 Clay, yellow brown, silty, sandy, pebbly; scattered sand and gravel layers (till)

1,610-1,561 Clay, gray, silty, sandy, pebbly; a few sand and gravel stingers (till)

1,561-1,551 Sand and gravel

1 ,55 1 - 1 ,526 Clay, brown(?), silty, sandy, pebbly (till)

1,526-1,474 Clay, gray, silty, sandy, pebbly; scattered sand and gravel stringers (till)

1 ,474- 1 ,435 Clay, gray, silty, sandy, pebbly (till)

1,435-1,375 Sand, gray, medium; several clay layers

1,375-1,340 Shale, dark-gray; greasy, noncalcareous (Pierre Shale)

Electric log available

Section A - Geologic Logs 139
Local number: 122N47W35DDCD

Other identifier: R2-85-28

Site identification number: 451935096310001

Date of construction: 5-9-85

Land surface altitude: 1,100 feet

Total depth: 200 feet

Depth

0-37

37-51

51-54

54-59

59-86

86-124

124-130

130-161

161-182

182-200

Thickness 

(feet)

37

14

3

5

27

38

6

31

21

18

Altitude 

(feet)

1,100-1,063

1,063-1,049

1,049-1,046

1,046-1,041

1,041-1,014

1,014-976

976-970

970-939

939-918

918-900

Description

Clay, brown, silty, very sandy, pebbly (till)

Clay, gray, silty, very sandy, pebbly (till)

Sand, coarse

Clay, gray, very silty, sandy, pebbly, shaley (till)

Sand, medium, to medium gravel; clay layer from 80 to 82 feet

Clay, gray, silty, sandy, pebble; shale rich (till)

Sand, coarse; to fine gravel

Clay, gray, silty, sandy, pebbly; shale rich; lake deposits, clay and fine silt from 143 to 

150 feet (till)

Mudstone, dark-brown, tan speckles; calcareous, hard (Fairport Shale Member? - 

Carlile Shale)

Mudstone, dark-brown, tan speckles, calcareous; crystalline carbonate fragments, soft,

calcareous, white clays, drill chatter (Greenhorn Limestone)

Well screened from 74 to 79 feet; 2-inch PVC screen and casing. Electric log available

140 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County investigation
Local number: 122N48W35DDDD

Other identifier: R2-85-23

Site identification number: 451935096381501

Date of construction: 5-7-85

Land surface altitude: 1,110 feet

Total depth: 290 feet

Depth

0-1

1-18

18-36

36-48

48-78

78-92

92-118

118-122

122-136

136-205

Thickness 

(feet)

1

17

18

12

30

14

26

4

14

69

Altitude 

(feet)

1,110-1,109

1,109-1,092

1,092-1,074

1,074-1,062

1,062-1,032

1,032-1,018

1,018-992

992-988

988-974

974-905

Description

Topsoil, black

Clay, tan to brown, very silty, sandy, pebbly (till)

Clay, gray, very silty, sandy, pebbly (till)

Sand, medium to coarse; to fine travel in lower portion; upper parts look oxidized

Clay, pinkish- to brownish-gray, silty, very sandy, pebbly; some sand stringers

Sand, medium; to fine gravel; clay layers

Clay, dark-gray, silty, very sandy, pebbly (till)

Gravel, coarse

Clay, dark-gray to black, silty, sandy, pebbly (?); might be shale

Claystone, dark-brown to black; greasy, noncalcareous; fine sand partings with very soft

205-240

240-290

35

50

905-870

870-820

Unit contacts in bedrock are from cuttings log, 

Limestone

clay (Blue Hill Member? - Carlile Shale)

Mudstone, dark-brown, tan speckles; calcareous; hard (Fairport Shale Member? - 

Carlile Shale)

Mudstone, dark-brown, tan speckles; calcareous; drill chatter; soft white calcareous 

clays, crystalline calcite fragments (Greenhorn Limestone)

so they may both be exact. May have penetrated Graneros Shale below the Greenhorn

Section A - Geologic Logs 141
Local number: 122N49W33CCCB

Other identifier: R20-88-47

Site identification number: 451941096491701

Date of construction: 9-14-88

Land surface altitude: 1,214 feet

Total depth: 458 feet

Depth

0-2

2-21

21-107

107-116

116-257

257-362

632-454

454-458

Thickness 

(feet)

2

19

86

9

141

105

92

4

Altitude 

(feet)

1,214-1,212

1,212-1,193

1,193-1,107

1,107-1,098

1,098-957

957-852

852-760

760-756

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, gray, silty, sandy, pebbly; sand intervals from 32 to 36, 50 to 57, and 60 to 62 feet 

(till)

Clay, olive gray, silty, sandy, pebbly (till)

Sand, medium to fine, clayey to 175 feet

Clay, gray, (Blue Hill Shale Member - Carlile Shale)

Clay, dark-brown; calcareous (Fairport Shale Member - Carlile Shale)

Limestone, dark-brown (Greenhorn Limestone)

Local number: 122N49W35BBBB

Other identifier: Rl-82-46

Site identification number: 452026096464801

Date of construction: 5-18-82

Land surface altitude: 1,169 feet

Total depth: 65 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-2

2-12

12-45

45-65

2 1.169-1,167 Topsoil, black

10 1,167-1,157 Clay, brown, silty, sandy, pebbly (till)

33 1,157-1,124 Clay, gray, silty

20 1,124-1,104 Shale

142 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 122N49W35DDDD

Other identifier: R2-86-80

Site identification number: 451946096453701

Date of construction: 9-9-86

Land surface altitude: 1,165 feet

Total depth: 372 feet

Depth

0-2

2-10

10-22

22-42

42-51

51-79

79-303

303-360

360-372

Electric log

Thickness 

(feet)

2

8

12

20

9

28

224

57

12

available

Altitude 

(feet)

1,165-1,163

1,163-1,155

1,155-1,143

1,143-1,123

1,123-1,114

1,114-1,086

1,086-862

862-805

805-793

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly (till - New Ulm?)

Clay, gray, silty, sandy, pebbly (till - Granite Falls? or Whetstone?)

Silt, gray; calcareous; minor sand initially, increasing with depth

Sand and gravel, gray

Shale, dark-brownish-gray, silty; noncalcareous; organic looking (Carlile Shale?)

Shale, dark-blue-gray; greasy, noncalcareous; some fine sand partings between 240 and 

280 feet (Blue Hill Shale Member - Carlile Shale)

Shale, dark-brown with tan specks, silty; calcareous (Fairport Shale Member - Carlile 

Shale)

Limestone, dark-brownish-gray; dirty, some dark-brown shale (Greenhorn Limestone)

Section A - Geologic Logs 143
Local number: 122N52W19CCCC R

Other identifier: R-70

Site identification number: 451936097133301

Date of construction: 8-20-70

Land surface altitude: 1,870 feet

Total depth: 515 feet

Depth

0-14

14-80

80-109

109-120

120-170

170-220

220-289

289-311

311-336

336-346

346-416

416-437

437-483

483-515

Thickness 

(feet)

14

66

29

11

50

50

69

22

25

10

70

21

46

32

Altitude _. . .. 

(feet) Descr.pt.on

1 ,870- 1 ,856 Sand and gravel, coarse

1 ,856- 1 ,790 Clay, yellowish-brown, pebbly

1,790- 1 ,76 1 Clay, gray, pebbly

1,761-1,750 Gravel and clay stringers

1,750-1,700 Clay, gray, pebbly

1,700-1,650 Clay; partially oxidized (till)

1 ,650- 1,581 Clay, gray, pebbly

1 ,58 1 - 1 ,559 Gravel and clay stringers

1 ,559- 1 ,534 Clay, gray, pebbly

1,534-1,524 Sand and gravel, medium to coarse

1 ,524- 1 ,454 Clay, gray, pebbly

1,545-1,433 Sand and gravel, clayey; with clay stringers

1,433-1,387 Clay, light-gray to white; some gravel (marl)

1,387-1,355 Shale

Electric log available

144 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigetion
Local number: 122N53W16DCCD R

Other identifier: WA-6

Site identification number: 454030097174501

Date of construction: 6-66

Land surface altitude: 1,812 feet

Total depth: 445 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-2

2-15

15-47

47-80

80-124

124-195

195-210

210-385

385-419

419-445

2

13

32

33

44

71

15

175

34

26

1,812-1,810 Topsoil

1,810-1,797 Gravel

1,797-1,765 Clay, gray; several thin sand lenses

1,765-1,732 Gravel medium to coarse

1,732-1,688 Sand

1,688-1,617 Clay, gray; gravel stringers and 163 to 195 feet

1,617-1,602 Gravel; and clay stringers

1,602-1,427 Clay, gray; thin gravel lenses at 210 to 240 feet, rocky at 360 to 375 feet (till)

1,427-1,393 Gravel

1,393-1,367 Pierre Shale

Electric log available

Local number: 123N53W13CCCC R

Other identifier: R-71

Site identification number: 452544097144801

Date of construction: 8-20-70

Land surface altitude: 1,874 feet

Total depth: 700 feet

Depth

0-17

17-56

56-72

72-98

98-142

142-190

190-684

684-700

Thickness 

(feet)

17

39

16

26

44

48

494

16

Altitude 

(feet)

1,874-1,857

1,857-1,818

1,818-1,802

1,802-1,776

1,776-1,732

1,732-1,684

1,684-1,190

1,190-1,174

Description

Clay, yellow brown, sandy, pebbly (till)

Clay, gray, sandy, pebbly (till)

Clay, yellow brown, silty, sandy (till)

Sand, yellow brown, clayey, gravelly

Clay, dark-gray, pebbly; very hard (till)

Clay, yellow (till)

Clay, gray, silty, sandy, pebbly (till)

Shale, dark-gray; thin bentonite layers

Electric log available

Section A - Geologic Logs 145
Local number: 123N53W27CCCC R

Other identifier: R-69

Site identification number: 452357097171601

Date of construction: 8-18-70

Land surface altitude: 1,882 feet

Total depth: 840 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-17 17 1,882-1.865 Clay, yellow, silty, pebbly, gravelly in spots

17-60 43 1,865-1.822 Sand and gravel, medium to coarse

60-103 43 1,822-1,779 Clay, gray, silty, pebbly

103-106 3 1,779-1,776 Clay, yellow

106-123 17 1,776-1,759 Clay, light-gray, silty, sandy

123-137 14 1,759-1,745 Sand and gravel, medium to coarse; with some clay

137-152 15 1,745-1,730 Till, yellow to gray; gravel stringers

152-166 14 1,730-1,716 Clay, medium-gray to green; slightly oxidized, some black organic clay

166-185 19 1,716-1,697 Clay, gray, compact

185-200 15 1,697-1,682 Clay, gray, pebbly

200-207 7 1,682-1,675 Sand and gravel

207-217 10 1,675-1,665 Clay, gray

217-255 38 1,665-1,627 Clay, yellow, gravelly; sample contains gray and yellow oxidized clay, and some gravel

255-360 105 1,627-1,522 Clay, gray, silty, pebbly

360-425 65 1,522-1,457 Clay, dark-gray, very sandy; with gravelly layers and rocks

425-620 195 1,457-1,262 Clay, dark-gray, sandy, pebbly; some reworked shale present

620-645 25 1,262-1,237 Clay, gray (lacustrine)

645-685 40 1,237-1,197 Till(?), gray, silty, pebbly; some light-gray marl

685-700 15 1,197-1,182 Clay, gray; lots of marl, cuttings look like shale and yellow clay

700-710 10 1,182-1,172 Clay, medium to dark-gray, silty; some hard, dark-shale

710-785 75 1,172-1,097 Clay, medium to light-gray, silty, marly; calcareous

785-840 55 1,097-1,042 Shale, bluish-black; blocky, compact 

Electric log available. E-log places bedrock surface at 672 feet

146 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 124N49W8ADDC R

Other identifier: RB-81-23

Site identification number: 453354096491901

Date of construction: 6-25-81

Land surface altitude: 1,022 feet

Total depth: 170 feet

Depth

0-2

2-20

20-26

26-37

37-50

50-111

111-116

116-145

145-148

148-152

152-156

156-161

161-163

163-170

Thickness 

(feet)

2

18

6

11

13

61

5

29

3

4

4

5

2

7

Altitude 

(feet)

1,022-1,020

1,020-1,002

1,002-996

996-985

985-972

972-911

911-906

906-877

877-874

874-870

870-866

866-861

861-859

859-852

Description

Clay, yellow brown, silty, sandy, pebbly (till)

Sand, brown, medium to fine, well sorted; estimate 85-90% of cuttings are quartz grains 

(Veblen aquifer)

Sand, gray, medium to fine; dominantly quartz grains (Veblen aquifer)

Shale; poor sample return

Shale, medium-gray; noncalcareous, samples are cut into "ribbons" (Carlile Shale)

Shale, medium-gray; very slightly calcareous, samples cut into "ribbons" (Carlile 

Shale)

Shale, light- to medium-brown, with orangish-brown mottling; very calcareous (Carlile 

Shale)

Shale, medium-gray; noncalcareous (Carlile Shale)

Sand(?); poor return but noticed slightly harder drilling (Codell Sandstone Member - 

Carlile Shale)

Shale, medium-gray (Carlile Shale)

Sand(?); poor sample return (Codell Sandstone Member - Carlile Shale)

Shale, medium-gray, samples are cut into "ribbons" (Carlile Shale)

Sand(?); poor sample return (Codell Sandstone Member? - Carlile Shale)

Shale, medium-gray; samples are cut into "ribbons" (Carlile Shale)

Electric log available

Section A - Geologic Logs 147
Local number: 124N50W5CADD R

Other identifier: PEEVER 8

Site identification number: 453250096565301

Date of construction: 1973

Land surface altitude: 1,185 feet

Total depth: 140 feet

Depth

0-4

4-13

13-126

126-140

Thickness 

(feet)

4

9

113

14

Altitude 

(feet)

1,185-1,181

1,181-1,172

1,172-1,059

1,059-1,045

Soil, dark-gray

Clay, yellowish-brown

Clay, gray (till)

Clay, dark-gray (shale)

Description

Local number: 124N50W6BBCC R

Other identifier: BARSE

Site identification number: 453318096583201

Date of construction: 12-22-76

Land surface altitude: 1,218 feet

Total depth: 800 feet

Depth

0-154

154-213

213-326

326-331

331-474

474-513

513-600

600-686

686-701

701-784

784-800

Thickness 

(feet)

154

59

113

5

143

39

87

86

15

83

16

Altitude 

(feet)

1,218-1,064

1,064-1,005

1,005-892

892-887

887-744

744-705

705-618

618-532

532-517

517-434

434-418

Glacial drift

Pierre Shale

Niobrara Formation

Description

Codell Sandstone Member - Carlile Shale

Carlile Shale

Greenhorn Limestone

Belle Fourche Shale Member - Graneros Shale

Mowry Shale Member - Graneros Shale

Dakota Formation

Wash?

Granite Wash

Private well screened from 780 to 800 feet. Yielded very little if any water. Electric log available

148 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 124N53W1DDDD2 R

Other identifier: R-75

Site identification number: 453237097133802

Date of construction: 8-26-70

Land surface altitude: 2,027 feet

Total depth: 800 feet

Depth

0-34

34-37

37-43

43-80

80-100

100-232

232-264

264-270

270-290

290-308

308-367

367-376

376-744

744-800

Thickness 

(feet)

34

3

6

37

20

132

32

6

20

18

59

9

368

56

*£? Description

2,027-1,993 Till, brown

1,993-1,990 Till, gray

1 ,990- 1 ,984 Sand and gravel, medium to coarse

1,984-1,947 Till, yellow

1,947-1,927 Clay, grayish-brown (lacustrine)

1,927-1,795 Till, yellow

1,795-1,763 Till, gray

1 ,763- 1 ,757 Sand and gravel, clayey

1,757-1,737 Till, gray

1,737-1,719 Sand and gravel, well sorted

1,719-1,660 Till, gray

1 ,660- 1 ,65 1 Gravel, fine, sandy

1,651-1,283 Clay, gray; possibly some water laid material (till)

1,283-1,227 Shale

Electric log available

Section A - Geologic Logs 149
Local number: 124N53W33DADD2 R

Other identifier: R-72

Site identification number: 452833097172002

Date of construction: 8-24-70

Land surface altitude: 1,929 feet

Total depth: 560 feet

Depth

0-17

17-59

59-76

76-138

138-154

154-527

527-560

Thickness 

(feet)

17

42

17

62

16

373

33

Altitude 

(feet)

1,929-1.912

1,912-1,870

1,870-1,853

1,853-1,791

1,791-1,775

1,775-1,402

1,402-1,369

Description

Clay, yellow brown, silty; oxidized (till)

Clay, gray, silty; unoxidized (till)

Clay, yellow brown, silty, pebbly (till)

Gravel, red-brown, coarse, very sandy

Clay, yellow brown, silty, pebbly (till)

Clay, gray, sandy, very sandy at 480 to 527 feet, marly, pebbly (till)

Shale, gray

Electric log available

150 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 125N50W6BCCB R

Other identifier: RB-81 -14

Site identification number: 453822096584001

Date of construction: 4-21-81

Land surface altitude: 1,264 feet

Total depth: 215 feet

_ .. Thickness Altitude 

Depth (feet) (feet)

0-2

2-26

26-29

29-43

43-60

60-67

67-73

73-91

91-93

93-99

99-102

102-112

112-128

128-144

144-156

156-166

166-204

204-210

210-215

Well screened from

2

24

3

14

17

7

6

18

2

6

3

10

16

16

12

10

38

6

5

118 to

1,264-1,262

1,262-1,238

1,238-1,235

1,235-1,221

1,221-1,204

1,204-1,197

1,197-1,191

1,191-1,173

1,173-1,171

1,171-1,165

1,165-1,162

1,162-1,152

1,152-1,136

1,139-1,120

1,120-1,108

1,108-1,098

1,098-1.060

1,060-1.054

1,054-1,049

Description

Topsoil, black

Clay, yellow brown, silty, pebbly (till)

Clay, light-gray

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Clay, medium-reddish-brown, silty; no sand (buried weathering horizon)

Clay, medium-dark-gray, silty; non sand (loess?/lake clay?)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Sand, gray, fine to coarse

Clay, medium-dark-gray

Sand, gray, fine to coarse

Clay, gray, sandy, gravelly (till)

Sand, gray, medium to coarse; with fine gravel

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Gravel, gray, fine; with medium to very coarse sand

Clay, gray, gravelly (till)

Shale, very dark-gray (Pierre Shale)

Shale, very dark-gray; rig chatters through this interval (Pierre Shale)

Shale, very dark-gray (Pierre Shale)

123 feet; 2-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 151
Local number: 125N50W6CCCC R

Other identifier: RB-81 -15

Site identification number: 453752096584001

Date of construction: 4-21-81

Land surface altitude: 1,200 feet

Total depth: 90 feet

Depth

0-3

3-20

20-22

22-36

36-40

40-56

56-61

61-90

Thickness 

(feet)

3

17

2

14

4

16

5

29

Well screened from 37 to 40 feet;

Altitude 

(feet)

1,200-1,197

1,197-1,180

1,180-1,178

1,178-1,164

1,164-1,160

1,160-1,144

1,144-1,139

1,139-1,110

Description

Topsoil, black

Sand, medium to coarse; clayey in spots

Sand, medium to coarse

Sand, gray, medium to coarse, clayey

Sand, gray, medium to coarse

Clay, medium-dark-gray; very sandy form 46 to 48 feet

Sand, gray, medium to coarse; with very fine gravel

Shale, dark-gray (Pierre Shale)

2-inch PVC screen and casing. Electric log available

152 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 125N50W6DCCC R

Other identifier: RB-81-16

Site identification number: 453732096580301

Date of construction: 4-22-81

Land surface altitude: 1,230 feet

Total depth: 155 feet

Depth

0-1

1-21

21-25

25-42

42-50

50-56

56-64

64-82

82-107

107-118

118-128

128-134

134-155

Thickness Altitude 

(feet) (feet)

1

20

4

17

8

6

8

18

25

11

10

6

21

Well screened from 97.4 to

1,230-1,229

1,229-1,209

1,209-1,205

1,205-1,188

1,188-1,180

1,180-1,174

1,174-1,166

1,166-1,148

1,148-1,123

1,123-1,112

1,112-1,102

1,102-1,096

1,096-1,075

102.4 feet; 2-inch

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly (till)

Gravel, coarse

Clay, gray, silty, sandy, pebbly (till)

Sand, gray, fine to coarse

Clay, gray, silty (loess? or lake clay?)

Sand, gray; with medium to coarse gravel

Clay, gray; very silty and sandy from 68 to 72 feet

Sand, medium to coarse; with thin clay stringers

Sand, medium to coarse; clayey

Clay, gray, silty, sandy, pebbly (till)

Sand, gray, medium to coarse; with gravel

Shale, gray (Pierre Shale)

PVC screen and casing. Electric log available

Section A - Geologic Logs 153
Local number: 125N50W8BBBAR

Other identifier: RB-81 -11

Site identification number: 453751096572401

Date of construction: 4-9-81

Land surface altitude: 1,216 feet

Total depth: 140 feet

Depth

0-9

9-17

17-43

43-44

44-67

67-102

Thickness 

(feet)

9

8

26

1

23

35

Altitude 

(feet)

1,216-1,207

1,207-1,199

1,199-1.173

1,173-1,172

1,172-1,149

1,149-1,114

Description

Silt, black, clayey (colluvium)

Clay, yellow brown, silty, sandy, pebbly (till)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Clay, light-gray; moderately calcareous

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Clay, medium-dark-gray, silty, sandy, pebbly; interbedded with very coarse sand and

gravel lenses (till)

102-114 12 1,114-1,102 Sand, gray, medium to very coarse; lots of shale grains which are very coarse sand to

fine gravel size

114-140 26 1,102-1,076 Shale, dark-gray; soft on top but becoming harder with depth (Pierre Shale) 

Well screened from 105 to 110 feet; 2-inch PVC screen and casing. Electric log available

154 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 125N50W8CCCC R

Other identifier: RB-81-06

Site identification number: 453700096572701

Date of construction: 4-8-81

Land surface altitude: 1,207 feet

Total depth: 170 feet

Depth

0-1

1-6

6-12

12-30

30-38

30-50

50-58

58-73

73-100

100-143

143-170

Thickness 

(feet)

1

5

6

18

8

12

8

15

27

43

27

Altitude 

(feet)

1,207-1,206

1,206-1,201

1,201-1,195

1,195-1,177

1,177-1,169

1,169-1,157

1,157-1,149

1,149-1,134

1,134-1,107

1,107-1,064

1,064-1,037

Description

Topsoil, brown

Sand, brown, medium to coarse

Clay, yellow brown, silty, pebbly (till)

Sand, brown, medium to very coarse

Clay, gray, very silty (lake clay)

Sand, brownish-gray, medium to very coarse; with gravel and many dark-gray Vi-inch 

shale fragments

Clay, gray (lake clay?)

Sand, gray, medium to very coarse; with gravel and clayey from 63 to 67 feet

Clay, medium-dark-gray, silty, sandy, pebbly; soft (till)

Clay, medium-dark-gray, sandy, gravelly (till)

Shale, dark-gray; hard (Pierre Shale)

Electric log available

Section A - Geologic Logs 155
Local number: 125N50W20DDDD R

Other identifier: RB-81-04

Site identification number: 453514096561401

Date of construction: 4-7-81

Land surface altitude: 1,214 feet

Total depth: 200 feet

Depth

0-15

15-25

25-139

139-154

154-179

179-181

181-200

Thickness 

(feet)

15

10

114

15

25

2

19

Aititude 

(feet)

1,214-1,199

1,199-1,189

1,189-1,075

1,075-1,060

1,060-1,035

1,035-1,033

1,033-1,014

Description

Sand, brown, medium to very coarse

Clay, yellow brown, silty, pebbly (till)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Clay, medium-dark-gray, gravelly, sandy, (till)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Gravel; poor sample return

Clay, light- to medium-gray, silty; calcareous, samples turn brownish-gray upon being 

acidized, drill rig chatters through this interval (Niobrara Formation)

Electric log available. E-log suggests some change occurs from 108 to 139 feet, but it was not observed in drilling

Local number: 125N51W1DBBB R

Other identifier: RB-81-19

Site identification number: 453817096591801

Date of construction: 4-22-81

Land surface altitude: 1,261 feet

Total depth: 155 feet

Depth Thickness

0-1

1-42

42-46

46-58

58-99

99-112

112-120

120-126

126-135

135-155

Well screened from

1

41

4

12

41

13

8

6

9

20

117 to 123

Aititude 

(feet)

1,261-1,260

1,260-1,219

1,219-1,215

1,215-1,203

1,203-1,162

1,162-1,149

1,149-1,141

1,141-1,135

1,135-1,126

1,126-1,106

Description

Topsoil, black

Clay, yellow brown, silty, sandy, pebbly (till)

Sand, brown, coarse; with very fine gravel

Clay, yellow brown, silty. sandy, pebbly (till)

Clay, medium-dark-gray, silty, sandy, pebbly (till)

Sand, gray, coarse; with cream colored rock fragments, shale grains

Gravel, gray, very coarse; Vi- to %-inch diameter, also with very coarse to coarse sand - 

excellent material!

Clay, gray; poor sample

Gravel, gray, very coarse; with very coarse sand

Shale, dark-gray (Pierre Shale)

feet; 2-inch PVC screen and casing. Electric log available

156 Hydroiogic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County investigation
Local number: 125N51W13ABBB R

Other identifier: RB-81-09

Site identification number: 453658096591701

Date of construction: 4-9-81

Land surface altitude: 1,202 feet

Total depth: 50 feet

Depth

0-9

9-14

14-17

17-21

21-50

Electric log

Thickness 

(feet)

9

5

3

4

29

available

Altitude 

(feet)

1,202-1,193

1,193-1,188

1,188-1,185

1,185-1,181

1,181-1,152

Sand, brown, medium to coarse

Clay, yellow brown, silty

Description

Sand, grayish-brown, medium to coarse

Clay, gray, silty

Shale, dark-gray (Pierre Shale)

Local number: 125N51W25ABAB R

Other identifier: RB-81 -01

Site identification number: 453514096591201

Date of construction: 4-6-81

Land surface altitude: 1,214 feet

Total depth: 50 feet

Depth

0-2

2-7

7-17

17-20

20-26

26-50

Thickness 

(feet)

2

5

10

3

6

24

Altitude 

(feet)

1,214-1,212

1,212-1,207

1,207-1,197

1,197-1,194

1,194-1,188

1,188-1,164

Description

Topsoil, black

Clay, light-gray

Sand, brown, very coarse, poorly sorted; color becomes gray with fine gravel at the base

Clay, olive gray, very sandy (till)

Clay, medium-dark-gray, silty, sandy (till)

Shale, light-bluish-gray; color grades to dark-gray, hard

Electric log available

Section A - Geologic Logs 157
Local number: 125N55W36CDCD

Other identifier: R-l

Site identification number: 453517097222501

Date of construction: 8-19-68

Land surface altitude: 1,853 feet

Total depth: 900 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-17 17 1,853-1,836 Clay, pebbly, sandy, silty, tan (till)

17-166 149 1,836-1,687 Clay, silty, very rocky, gray (till)

166-183 17 1,687-1,670 Gravel, brownish-gray

183-223 40 1,670-1,630 Clay, gray (till)

223-225 2 1,630-1,628 Gravel

225-245 20 1,628-1,608 Clay, pebbly, yellowish-brown (till)

245-323 78 1,608-1,530 Clay, pebbly, much gravel (till)

323-335 12 1,530-1,518 Gravel

335-395 60 1,518-1,458 Clay, sandy (till)

395-410 15 1,458-1,443 Gravel

410-440 30 1,443-1,413 Clay, gravelly, some very fine sand (till)

440-465 25 1,413-1,388 Clay, sandy, a lot of gravel (till)

465-560 95 1,388-1,293 Clay, sandy, dark-gray (till)

560-620 60 1,293-1,233 Clay, gravelly (till)

620-677 57 1,233-1,176 Clay, sandy, a lot of graveHtill)

677-740 63 1,176-1,113 Gravel

740-755 15 1,113-1,098 Clay, very gravelly and sandy (till)

755-770 15 1,098-1,083 Gravel, lots of lignite

770-800 30 1,083-1,053 Gravel

800-820 20 1,053-1,033 Clay, some sand, light-gray

820-900 80 1,033-953 Shale 

Electric log available. Electric log shows shale at depth of 805 feet

158 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N49W32BBBB R

Other identifier: RB-81-25

Site identification number: 453934096495701

Date of construction: 6-30-81

Land surface altitude: 995 feet

Total depth: 230 feet

Depth

0-1

1-7

7-24

24-27

27-122

122-130

130-185

Thickness 

(feet)

1

6

17

3

95

8

55

Altitude 

(feet)

995-994

994-988

988-971

971-968

968-873

873-865

865-810

Description

Topsoil, black

Sand, brown; with fine gravel

Clay, medium-dark-gray, silty, sandy, pebbly; calcareous (till)

Sand, gray, medium to coarse

Shale, dark-gray; slightly calcareous, hard and cuts into "ribbons," uniform drilling 

(Carlile Shale)

Sand(?); based on electric log (Codell Sandstone Member - Carlile Shale)

Shale, dark-gray; slightly calcareous, hard and cuts into "ribbons," uniform drilling,

185-199

199-222

14

23

222-230 8 

Electric log available

concretions(?) at 140 feet (Carlile Shale)

810-796 Limestone, medium-brown to dark-brownish-gray; interbedded with shale, angular 

limestone chips are calcareous and occur in lumps of shale (Greenhorn Limestone)

796-773 Shale, dark-gray; interbedded with brown limestone and occasional bentonites 

(Greenhorn Limestone)

773-765 Shale, dark-gray to very dark-gray (Graneros Shale)

Local number: 126N51W9AAAB R

Other identifier: RB-79-18

Site identification number: 454305097023501

Date of construction: 9-19-79

Land surface altitude: 1,160 feet

Total depth: 80 feet

Depth

0-1

1-14

14-55

55-80

Thickness 

(feet)

1

13

41

25

Altitude 

(feet)

1,160-1,159

1,159-1,146

1,146-1,105

1,105-1,080

Description

Topsoil, black

Clay, yellow brown (till)

Clay, gray; a few sand stringers (till)

Clay, gray, black; shell fragments, good shale cuttings (shale)

Section A - Geologic Logs 159
Local number: 126N51W30CCCC R

Other identifier: RB-81-24

Site identification number: 453940097060701

Date of construction: 6-30-81

Land surface altitude: 1,410 feet

Total depth: 735 feet

Depth

0-24

24-115

115-145

145-160

160-185

185-245

245-280

280-300

300-350

350-377

377-397

397-428

428-505

505-550

550-560

560-580

580-600

600-653

653-699

Thickness 

(feet)

24

91

30

15

25

60

35

20

50

27

20

31

77

45

10

20

20

53

46

Altitude 

(feet)

1,410-1,386

1,386-1,295

1,295-1,265

1,265-1,250

1,250-1,225

1,225-1,165

1,165-1,130

1,130-1,110

1,110-1,060

1,060-1,033

1,033-1,013

1,013-982

982-905

905-860

860-850

850-830

830-810

810-757

757-711

Description

Shale, medium-dark-gray; with orangish-iron stains, bentonitic (Pierre Shale)

Shale, black to very dark-gray, bentonite at 85 feet (Pierre Shale)

Shale, medium-dark-gray; bentonitic (Pierre Shale)

Shale, medium to light-gray (Pierre Shale)

Shale, medium-dark-gray (Pierre Shale)

Shale, light-gray, with bentonite (Pierre Shale)

Shale, medium-gray; easier drilling than interval from 185 to 245 feet, noncalcareous 

(Pierre Shale)

Shale, medium-gray; soft, easy drilling (Pierre Shale)

Shale, medium-dark-gray; hard, cuttings almost "snap" into pieces, noncalcareous 

(Pierre Shale)

Shale, very dark-gray; hard cuttings almost "snap" into pieces (Sharon Springs 

Member - Pierre Shale)

Clay, medium-olive-gray; very calcareous, cuttings turn olive brown color upon 

acidization, trace of cream colored rock chips (Niobrara Formation)

Shale, medium-dark-gray; with faint blue sheen; concretions, slightly calcareous 

(Carlile Shale)

Shale, medium-dark-gray; with faint blue sheen, quiet and uniform drilling

Shale, dark-gray; waxy, noncalcareous (Carlile Shale)

Shale, medium-dark-gray; with medium-gray calcareous fragments

Shale, medium-gray; calcareous, soft, uphole abrasion of cuttings seems to yield 

rounded or oblate shapes (Carlile Shale)

Shale, medium-dark-gray; noncalcareous (Carlile Shale)

Shale, dark-gray to very dark-gray; noncalcareous (Carlile Shale)

Clay, gray; interbedded shale and limestone, rig alternately drills very hard layers and

then soft layers, trace of light-gray bentonite (Greenhorn Limestone) 

699-735 36 711-675 Shale, gray (Graneros Shale) 

Electric log available to depth of 550 feet. Below 550 feet, lithology is based on cuttings sampled at 10-foot increments and driller's log

160 Hydrologic and Wster-Quslity Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N52W16DDC R

Other identifier: LONG HOLLOW

Site identification number: 454125097102601

Date of construction: 7-2-85

Land surface altitude: 1,730 feet

Total depth: 1,265 feet

Depth

0-293

293-635

635-711

711-930

930-972

972-1,176

1,176-1,265

1,265

Thickness 

(feet)

293

342

76

219

42

204

89

Altitude 

(feet)

1,730-1,437

1,437-1,095

1,095-1,019

1,019-800

800-758

758-554

554-465?

465?

Description

Glacial drift

Pierre Shale

Niobrara Formation

Carlile Shale

Greenhorn Limestone

Graneros Shale

Dakota Formation

Precambrian basement (granite)?

Electric log available

Section A - Geologic Logs 161
Local number: 126N53W10DADA R

Other identifier: R-59

Site identification number: 454228097161501

Date of construction: 8-24-71

Land surface altitude: 1,950 feet

Total depth: 523 feet

Depth

0-12

12-20

20-60

60-76

76-82

82-100

100-112

112-115

115-123

123-142

142-156

156-193

193-213

213-218

218-258

258-261

261-268

268-306

306-312

312-368

368-374

374-488

488-505

505-523

Thickness 

(feet)

12

8

40

16

6

18

12

3

8

19

14

37

20

5

40

3

7

38

6

56

6

114

17

18

ASe Descrip«°-

1,950-1,938 Clay, gray

1 ,938- 1 ,930 Clay, silty, dark-black

1,930-1,890 Clay, silty, gravelly, gray

1 ,890- 1 ,874 Clay and gravel layers

1,874-1,868 Gravel

1 ,868- 1 ,850 Clay, silty, gray

1 ,850- 1 ,838 Gravel with large rocks ;

1,838-1,835 Clay, pebbly, gray (till)

1 ,835- 1 ,827 Gravel with clay stringers

1 ,827- 1 ,808 Clay, silty, pebbly, gravel stringers

1 ,808- 1 ,794 Gravel, large rocks and clay stringers

1 ,794- 1 ,757 Clay, gray, pebbly (till)

1,757-1,737 Gravel, clean

1,737-1,732 Clay, gray, pebbly (till)

1 ,732- 1 ,692 Gravel, layers of clayey gravel

1,692-1,689 Clay

1,689-1,682 Gravel

1,682-1 ,644 Clay, gray, pebbly (till)

1,644-1,638 Gravel, clayey

1,638-1,582 Clay, pebbly, gray (till)

1,582-1,576 Gravel, clayey

1,576-1,462 Clay, gray, pebbly (till)

1,462-1,445 Gravel with clay layers

1 ,445- 1 ,427 Clay, black (Pierre Shale)

Electric log available

162 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: L26N54W3CBDB R

Other identifier: R-58

Site identification number: 454327097243501

Date of construction: 8-19-71

Land surface altitude: 1,862 feet

Total depth: 425 feet

Depth

0-1

1-31

31-80

80-92

92-124

124-280

280-287

287-336

336-342

342-346

346-376

376-393

393-397

397-425

Thickness 

(feet)

1

30

49

12

32

156

7

49

6

4

30

17

4

28

Altitude (feet) Descr,pt,on

1 ,862- 1 ,86 ] Topsoil, black

1 ,86 1 - 1 ,83 1 Clay, yellow brown, pebbly (till)

1 ,83 1 - 1 ,782 Clay, silty, pebbly, gray (till)

1,782-1,770 Gravel

1,770-1,738 Clay, gray

1,738-1,582 Clay, gray, pebbly (till)

1,582-1,575 Gravel

1 ,575- 1 ,526 Clay, silty, gray, pebbly (till)

1,526-1,520 Gravel

1,520-1,516 Clay, gray

1 ,5 1 6- 1 ,486 Sand and gravel

1,486-1 ,469 Clay, some sand layers

1 ,469- 1 ,465 Sand, coarse

1 ,465- 1 ,437 Shale, dark-gray (Pierre Shale)

Electric log available

Section A - Geologic Logs 163
Local number: 126N54W25AAAA2 R

Other identifier: R-61

Site identification number: 454025097211502

Date of construction: 8-26-71

Land surface altitude: 1,845 feet

Total depth: 485 feet

Depth

0-8

8-19

19-23

23-95

95-155

155-172

172-215

215-275

275-292

292-338

338-418

418-422

422-456

456-465

465-485

Thickness 

(feet)

8

11

4

72

60

17

43

60

17

46

80

4

34

9

20

Altitude 

(feet) Description

1,845-1,837 Clay, silty, yellowish-brown, pebbly (till)

1 ,837- 1 ,826 Clay, brownish-gray, pebbly (till)

1,826-1,822 Gravel

1 ,822- 1 ,750 Clay, silty, gray, pebbly (till)

1,750-1,690 Clay, gray, gravelly in spots (till), some 3-inch to 1-foot gravel stringers

1,690-1,673 Gravel, some clay layers

1,673-1,630 Clay, yellow, some gravel stringers (till)

1,630-1,570 Clay, gray, pebbly, gravel stringers

1,570-1,553 Gravel

1,553-1,507 Clay, gray, gravelly, some gravel stringers

1 ,507- 1 ,427 Clay, light-gray mixed with brown, pebbly (till)

1,427-1,423 Gravel

1,423-1,389 Clay, light-gray an d brown, gravelly (till)

1,389-1,380 Gravel

1,380-1,360 Clay, dark-bluish-gray (Pierre Shale)

Electric log available

164 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 126N55W31CCCD

Other identifier: R-52

Site identification number: 454030097285401

Date of construction: 8-6-71

Land surface altitude: 1,800 feet

Total depth: 785 feet

Depth

0-3

3-15

15-25

25-28

28-42

42-63

63-65

65-192

192-212

212-239

239-248

248-290

290-308

308-352

352-380

380-393

393-487

487-505

505-554

554-601

601-607

607-614

614-618

618-621

621-668

668-740

740-747

747-785

Electric log

Thickness 

(feet)

3

12

10

3

14

21

2

127

20

27

9

42

18

44

28

13

94

18

49

47

6

7

4

3

47

72

7

38

available

Altitude 

(feet)

1,800-1,797

1,797-1,785

1,785-1,775

1,775-1,772

1,772-1,758

1,758-1,737

1,737-1,735

1,735-1,608

1,608-1,588

1,588-1,561

1,561-1,552

1,552-1,510

1,510-1,492

1,492-1,448

1,448-1,420

1,420-1,407

1,407-1,313

1,313-1,295

1,295-1,246

1,246-1,199

1,199-1,193

1,193-1,186

1,186-1,182

1,182-1,179

1,179-1,132

1,132-1,060

1,060-1,053

1,053-1,015

Description

Topsoil

Clay, yellow, pebbly (till)

Clay, yellow turning gray at 25 feet (lake deposits)

Clay, gray, pebbly (till)

Sand, gray

Clay, gray, silty, pebbly (till)

Gravel

Clay, gray, silty, gravelly in spots (till)

Gravel, clay layer at 204 to 210 feet

Clay, gray, gravelly (till)

Gravel

Clay, gray, gravelly (till)

Gravel

Clay, dark-gray, pebbly (till)

Sand, fine to very coarse, clayey, gray

Clay, light-green to light-gray, light-green is clean clay, gray is pebbly

Clay, gray, pebbly (till)

Clay, gray, some very fine sand (lake deposits)

Clay, dark-gray, pebbly (till)

Sand, fine to very coarse; some pea size gravel, some clay

Clay, dark-gray, compact, pebbly

Sand

Clay, gray, pebbly

Sand

Clay, dark-gray, pebbly (till)

Sand and gravel, lots of coal from 692 to 725 feet

Clay, whitish-gray to light-gray, silty

Clay, bluish-black, compact (Pierre Shale)

Section A - Geologic Logs 165
Local number: 127N50W18AAAD R

Other identifier: SATHER

Site identification number: 454725096573301

Date of construction: 1965?

Land surface altitude: 1,150 feet

Total depth: 753 feet

Depth

0-85

85-99

99-132

132-155

155-165

165-358

358-390

390-585

585-729

729-753

Thickness 

(feet)

85

14

33

23

10

193

32

195

144

24

AJeeT

1,150-1,065

1,065-1,051

1,051-1,018

1,018-995

995-985

985-792

792-760

760-565

565-421

421-397

Description

Clay

Poor sand

Good sand

Clay

Good sand

Carlile Shale

Greenhorn Limestone

Graneros Shale

Dakota Formation

Granite Wash

Electric log available

Local number: 127N53W1AAAA R

Other identifier: R-4

Site identification number: 454907097134401

Date of construction: 8-26-69

Land surface altitude: 1,252 feet

Total depth: 65 feet

Depth

0-3

3-12

12-18

18-40

40-65

Thickness 

(feet)

3

9

6

22

25

Altitude 

(feet)

1,252-1,249

1,249-1,240

1,240-1,234

1,234-1,212

1,212-1,187

Topsoil, black

Clay, yellowish, some pebbles

Description

Very large rocks (limestone?), gravel, some sand

Clay, gray, gravelly, pebbly

Shale

166 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 127N54W3AAAA R

Other identifier: R-60

Site identification number: 454400097233301

Date of construction: 8-24-71

Land surface altitude: 1,847 feet

Total depth: 380 feet

Depth

0-7

7-11

11-13

13-18

18-160

160-164

164-285

285-295

295-320

320-340

340-364

364-380

Thickness 

(feet)

7

4

2

5

142

4

121

10

25

20

24

16

Altitude 

(feet)

1,847-1,840

1,840-1,836

1,836-1,834

1,834-1,829

1,829-1,687

1,687-1,683

1,683-1,562

1,562-1,552

1,552-1,527

1,527-1,507

1,507-1,483

1,483-1,467

Description

Clay, yellowish-brown, pebbly (till)

Clay, gray, silty, pebbly (till)

Clay, brownish-gray (lake clay?)

Clay, gray, silty, clayey (lake clay?)

Clay, gray, silty, clayey, pebbly (till) some thin gravel stringers

Clay, gray, very tough, drilled like shale, had to use pulldown

Clay, gray, gravelly in spots (till)

Clay, same as above, some brown silty clay mixed

Clay, gray, pebbly (till)

Clay, gray, pebbly, gravelly in spots (till)

Clay, gray, sandy and gravelly (till)

Clay, dark-bluish-gray (shale)

in with it

Electric log available

Section A - Geologic Logs 167
Local number: 127N56W36AABB

Other identifier: R-51

Site identification number: 454632097291701

Date of construction: 8-4-71

Land surface altitude: 1,840 feet

Total depth: 545 feet

Depth

0-5

5-12

12-20

20-32

32-76

76-81

81-140

140-148

148-165

165-172

172-185

185-235

235-336

336-345

345-355

355-376

376-391

391-394

394-430

430-475

475-510

510-545

Thickness 

(feet)

5

7

8

12

44

5

59

8

17

7

13

50

101

9

10

21

15

3

36

45

35

35

A,zr *-

1,840-1,835 Sand and gravel

1.835-1.828 Clay, yellowish-brown, pebbly (till)

1,828-1.820 Clay, gray, pebbly (till)

1 .820- 1 .808 Clay, gray, sandy, gravelly (till)

1 ,808- 1 ,764 Clay, gray, pebbly (till)

1 ,764- 1 ,759 Gravel, some clay

1,759-1,700 Clay, gray, pebbly, some thin gravel stringers (till)

1 ,700- 1 ,692 Sand and gravel

1 ,692- 1 ,675 Clay, silty, gray, pebbly (till)

1 ,675- 1 ,668 Sand and clay layers

1 ,668- 1 ,655 Clay, gray (lake deposits)

1 ,655- 1 ,605 Clay, silty, gray, pebbly (till)

1 ,605- 1 ,504 Clay, gray, pebbly, some gravel layers

1,504-1,495 Gravel

1 ,495- 1 ,485 Clay, gray, pebbly (till)

1,485-1,464 Clay, greenish-brown, pebbly, hard drilling

1 ,464- 1 ,449 Clay, dark-gray to blackish-gray, pebbly (till)

1 ,449- 1 ,446 Sand, coarse, some fine sand, marly

1,446-1,410 Sand, fine to coarse, clay layers

1 ,4 10- 1 ,365 Clay, dark-gray, pebbly (till)

1,365-1,330 Clay, gray to brown, pebbly

1,330-1,295 Clay, bluish-black, compact (Pierre Shale)

Electric log available

168 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N53W10BBBB R

Other identifier: R-l

Site identification number: 455329097172501

Date of construction: 8-25-69

Land surface altitude: 1,250 feet

Total depth: 215 feet

Depth

0-21

21-27

27-110

110-120

120-130

130-140

140-160

160-170

170-178

178-215

Thickness 

(feet)

21

6

83

10

10

10

20

10

8

37

Altitude 

(feet)

1,250-1,229

1,229-1,223

1,223-1.140

1,140-1,130

1,130-1,120

1,120-1,110

1,110-1,090

1,090-1,080

1,080-1,072

1,072-1,035

Description

Clay, yellowish-brown

Clay, yellowish-brown, gravelly

Clay, gray, gravelly

Sand, coarse, gray

Gravel

Gravel, coarse

Gravel, fine and very coarse sand

Sand, very coarse, some gravel

Gravel

Shale

Section A - Geologic Logs 169
Local number: 128N53W12AAAA R

Other identifier: R-2

Site identification number: 455329097134401

Date of construction: 8-26-69

Land surface altitude: 1,210 feet

Total depth: 200 feet

Depth

0-28

28-45

45-60

60-75

75-78

78-110

110-120

120-130

130-140

140-150

150-168

168-200

Thickness 

(feet)

28

17

15

15

3

32

10

10

10

10

18

32

"Sc > 

1,210-1,182 Clay, yellowish-brown, silty, sandy

1,182-1,165 Clay, yellowish-brown, silty, pebbly (till)

1 , 1 65- 1 , 1 50 Clay, gray, very silty, slightly pebbly (till)

1,150-1,135 Clay, gray, silty, pebbly (till)

1,135-1,132 Clay, gray, shaley pebbly, gravelly

1 , 1 32- 1 , 100 Clay, gray, silty, pebbly (till)

1 , 1 00- 1 ,090 Sand, medium, some coarse

1,090-1,080 Sand, clayey

1,080-1,070 Sand, coarse, some very coarse

1 ,070- 1 ,060 Sand, very coarse, clay layers

1 ,060- 1 ,042 Sand, medium

1,042-1,010 Shale

Electric log available

Local number: 128N53W14CCCC R

Other identifier: R-7

Site identification number: 455148097161001

Date of construction: 9-12-70

Land surface altitude: 1,250 feet

Total depth: 95 feet

Depth

0-1

1-18

18-78

78-95

Thickness 

(feet)

1

17

60

17

Altitude 

(feet)

1,250-1,249

1,249-1,232

1,232-1,172

1,172-1,155

Topsoil

Clay, yellowish-brown, pebbly

Clay, silty, gray, pebbly

Shale (Pierre Shale)

Description

170 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N53W15BAAA R

Other identifier: R-9

Site identification number: 455337097165201

Date of construction: 9-2-70

Land surface altitude: 1,250 feet

Total depth: 200 feet

Depth

0-3

3-15

15-120

120-170

170-195

195-200

Thickness 

(feet)

3

12

105

50

25

5

Altitude 

(feet)

1,250-1,247

1,247-1,235

1,235-1.130

1,130-1,080

1,080-1,055

1,055-1,050

Topsoil, black

Silt (lake deposits)

Clay, silty, yellowish-brown to gray

Gravel

Description

Clay, gray, pebbly (gravel layer on top of shale)

Shale (Pierre Shale)

Electric log available

Local number: 128N53W15CAAA R

Other identifier: R-10

Site identification number: 455211097165201

Date of construction: 9-3-70

Land surface altitude: 1,252 feet

Total depth: 110 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-26 26 1,252-1,226 Clay, yellowish-brown, pebbly (till)

26-58 32 1,226-1,194 Clay, silty, some very fine sand, gray, some pebbles (till)

58-60 2 1,194-1,192 Sand and gravel

60-89 29 1,192-1,163 Clay, silty, some very fine sand, gray

89-110 21 1,163-1,142 Shale, bluish-black, compact (Pierre Shale)

Section A - Geologic Logs 171
Local number: 128N53W15CBCB R

Other identifier: R-6

Site identification number: 455204097172501

Date of construction: 9-2-70

Land surface altitude: 1,268 feet

Total depth: 80 feet

Depth

0-9

9-16

16-72

72-80

Thickness 

(feet)

9

7

56

8

Altitude 

(feet)

1,268-1,259

1,259-1,252

1,252-1,196

1,196-1,188

Sand, rocks, gravel, and clay (till)

Clay, yellowish-brown, gravelly

Description

Clay, gray, pebbly (6-inch gravel stringer at 50 feet, 2-foot gravel stringer at 60 feet)

Shale (Pierre Shale)

Local number: 128N53W20BBBB R

Other identifier: ATH-22

Site identification number: 455144097195501

Date of construction: 10-11-68

Land surface altitude: 1,350 feet

Total depth: 108 feet

Depth

0-20

20-40

40-95

95-100

100-108

Thickness 

(feet)

20

20

55

5

8

Altitude 

(feet)

1,350-1,330

1,330-1,310

1,310-1,255

1,255-1,250

1,250-1.242

Description

Clay, light-tan, with light-gray streaks and some red spots (rust)

Clay, light-gray, streaked with light-tan

Clay, light-gray

Weathered shale (about 95 feet)

Shale

172 Hydrologic end Water-Quality Data, 1997 through 1999, Lake Traverse Reservetion/Roberts County Investigation
Local number: L28N53W22CCCC R

Other identifier: ATH-20

Site identification number: 455055097172501

Date of construction: 6-25-68

Land surface altitude: 1,305 feet

Total depth: 77 feet

Depth

0-2

2-10

10-12

12-15

15-19

19-45

45-55

55-77

Thickness 

(feet)

2

8

2

3

4

26

10

22

Altitude 

(feet)

1,305-1,303

1,303-1,295

1,295-1,293

1,293-1,290

1,290-1,286

1,286-1,260

1,260-1,250

1,250-1,228

Description

Topsoil

Clay, pebbly, light-brown

Clay, pebbly, yellow gray

Clay, pebbly, light-gray streaked with light-brown

Clay, pebbly, light-brown with some white streaks

Clay, light-tan with lighter and dark streaks

Clay, light-gray

Shale

Local number: 128N53W25AAAA R

Other identifier: R-3

Site identification number: 455052097134401

Date of construction: 8-26-69

Land surface altitude: 1,230 feet

Total depth: 110 feet

Depth

0-17

17-24

24-72

72-80

80-92

92-110

Thickness 

(feet)

17

7

48

8

12

18

Altitude 

(feet)

1,230-1,213

1,213-1,206

1,206-1,158

1,158-1,150

1,150-1,138

1,138-1,120

Clay, yellowish (till)

Clay, gray (till)

Clay, gray, pebbly (till)

Description

Sand, coarse to very coarse, and gravel, gray

Gravel and very coarse sand, gray

Shale

Electric log available

Section A - Geologic Logs 173
Local number: 128N53W33DDDD R

Other identifier: ATH-21

Site identification number: 454911097173001

Date of construction: 6-25-68

Land surface altitude: 1,430 feet

Total depth: 48 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-10 

10-15 

15-25 

25-30 

30-43 

43-48

10 1,430-1,420 Sand, very coarse; gravel, very fine to medium

5 1,420-1,415 Sand, very coarse, silty, large cobbles; water level at 7.4 feet

10 1,415-1,405 Sand, coarse to very coarse, saturated, less cobbles and gravel

5 1,4051,400 Sand, medium to very coarse

13 1,400-1,387 Clay, pebbles, gray; gravel

5 1,387-1,382 Shale?

174 Hydroiogic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 128N55W31CCBC R

Other identifier: R-50

Site identification number: 455102097284501

Date of construction: 8-3-71

Land surface altitude: 1,885 feet

Total depth: 470 feet

Depth

0-22

22-67

67-185

185-208

208-235

235-314

314-386

386-392

392-395

395-405

405-415

415-450

450-453

453-470

Thickness 

(feet)

22

45

118

23

27

79

72

6

3

10

10

35

3

17

Altitude 

(feet)

1,885-1,863

1,863-1,818

1,818-1,700

1,700-1,677

1,677-1,650

1,650-1,571

1,571-1,499

1,499-1,493

1,493-1,490

1,490-1,480

1,480-1,470

1,470-1,435

1,435-1,432

1,432-1,415

Description

Clay, yellowish-brown with some gray, pebbly (till)

Clay, gray, pebbly (till)

Clay, gray, sandy, gravelly in spots (till)

Clay, gray, tough in spots, clayey (till)

Clay, gray gravelly in spots (till)

Clay, gray, pebbly (till)

Clay, gray, gravelly in spots, very tough drilling (cut mud at 327 feet, drills easier now); 

clay is very sticky, clayey, shaley at 360 feet

Gravel

Clay, shaley

Gravel

Clay, gray, sandy, pebbly, gravelly in spots

Clay, grayish-brown, tough, shaley. mud turned brown (another till?); some white marl 

in cuttings (lake deposit?); brown clay between 440 to 450 feet

Sand and gravel layer, not very good but took water

Clay, bluish-black, compact (shale)

Section A - Geologic Logs 175
Local number: 128N56W1AAAA

Other identifier: R-48

Site identification number: 455606097284901

Date of construction: 8-2-71

Land surface altitude: 1,720 feet

Total depth: 260 feet

Depth

0-31

31-46

46-164

164-167

167-216

216-230

230-260

Electric log

Thickness 

(feet)

31

15

118

3

49

14

30

available

Altitude 

(feet)

1,720-1,689

1,689-1,674

1,674-1,556

1,556-1,553

1,553-1,504

1,504-1,490

1,490-1,460

Description

Clay, yellowish-brown, pebbly (till)

Clay, light-brownish-gray, pebbly (till)

Clay, dark-gray, pebbly (till), becomes gravelly at 98 feet

Gravel

Clay, dark-gray, very gravelly (till)

Clay, yellow brown

Clay, dark-blue gray (shale), bentonite mixed in with shale

176 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N50W24CCD R

Other identifier: 12186A

Site identification number: 455755096520101

Date of construction: 09-08-88

Land surface altitude: 1,089.52 feet

Total depth: 215 feet

_ .. Thickness 

Depth (feet)

0-2

2-17

17-47

47-92

92-110

110-117

117-123

123-138

138-145

145-157

157-177

177-180

180-204

204-215

Well screened from

2

15

30

45

18

7

6

15

7

12

20

3

24

11

198 to 203

Altitude _ . m. 

(feet) Descr.pt.on

1,089.52-1,087.52 Topsoil

1,087.52-1,072.52 Silt, clayey to pebbly, soft, slightly plastic, oxidized; gravel from 14 to 15 feet (till)

1 ,072.52- 1 ,042.52 Silt, clayey to pebbly, olive-gray, soft, slightly plastic (till)

1,042.52-997.52 Sand, fine, well sorted, subrounded and rounded quartz; contains detrital lignite 

below 60 feet

997.52-979.52 Silt, clayey, soft, nonplastic

979.52-972.52 Silt, clayey, soft, nonplastic; interbedded sand and gravel

972.52-966.52 Gravel, fine, granular, subangular to rounded; limestone and igneous

966.52-951 .52 Sand, coarse and very coarse, pebbly, subangular to rounded; interbedded clay and 

gravel

951.52-944.52 Gravel, coarse, subrounded and rounded, igneous and limestone

944.52-932.52 Clay, silty to pebbly, olive-gray, firm, nonplastic (till)

932.52-912.52 Clay, olive-black, firm, slightly plastic; pebbly with depth; sand from 174 to 175 feet

912.52-909.52 Gravel, fine to coarse, granular

909.52-885.52 Sand, fine to very coarse, granular, subrounded and rounded

885.52-874.52 Shale, brownish-black, firm

feet; 2-inch PVC screen and casing

Section A - Geologic Logs 177
Local number: 129N51W8CCC R

Other identifier: 13037

Site identification number: 455755097045501

Date of construction: 8-18-92

Land surface altitude: 1,196.2 feet

Total depth: 240 feet

0-2

2-4

4-23

23-25

25-33

33-36

36-40

40-45

45-77

77-81

81-127

127-136

136-155

155-163

163-189

189-231

231-240

Well screened from

2

2

19

2

8

3

4

5

32

4

46

9

19

8

26

42

9

148 to

1,196.2-1,194.2

1,194.2-1,192.2

1,192.2-1,173.2

1,173.2-1,171.2

1,171.2-1,166.2

1,166.2-1,160.2

1,160.2-1,156.2

1,156.2-1,151.2

1,151.2-1,119.2

1,119.2-1,115.2

1,115.2-1,069.2

1,069.2-1,060.2

1,060.2-1,041.2

1,041.2-1,033.2

1,033.2-1,007.2

1,007.2-965.2

965.2-956.2

Topsoil, black

Clay, light-olive gray, soft, plastic, oxidized; mottled to 10 feet (till)

Clay, silty, sandy, pebbly, light-olive-gray, slightly firm, oxidized; mottled to 10 feet 

(till)

Sand, fine and medium, oxidized

Clay, silty, sandy, pebbly, light-olive-gray, slightly firm, unoxidized (till)

Clay, silty, sandy, pebbly, olive-gray, oxidized

Silt, clayey, light-olive-gray, oxidized

Silt, clayey, olive-gray, unoxidized

Sand, fine, slightly pebbly, fine, well sorted, quartz, igneous, shale

Silt, clayey, medium-dark-gray, soft, slightly stick, plastic

Sand, fine, slightly pebbly, fine, well sorted, quartz, igneous, shale; some lignite return

Silt, clayey, medium-dark-gray, soft, slightly sticky, plastic

Sand, fine and medium, pebbly, fine, medium sorted, quartz, igneous, shale; coarser 

with depth

Sand, medium and coarse, pebbly, fine to coarse, medium sorted, angular to subrounded, igneous, carbonate, shale

Silt, clayey, medium-dark-gray, soft, sticky, plastic

Clay, silty, sandy, pebbly, olive-gray, slightly firm; cobbles at 189 feet; firm from 209 to 

231 feet (till)

Shale, grayish-black, hard; waxy appearance

153 feet; 2-inch PVC screen and casing

178 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N51W19ABAR

Other identifier: 13422

Site identification number: 455701097051501

Date of construction: 9-21-94

Land surface altitude: 1,191.23 feet

Total depth: 240 feet

Depth

0-2

2-7

7-28

28-34

34-53

53-55

55-65

65-87

87-142

Thickness 

(feet)

2

5

21

6

19

2

10

22

55

Altitude 

(feet)

1,191.23-1,189.23

1,189.23-1,184.23

1,184.23-1,163.23

1,163.23-1,157.23

1,157.23-1,138.23

1,138.23-1,136.23

1,136.23-1,126.23

1,126.23-1,104.23

1,104.23-1,049.23

Description

Topsoil. clay loam black

Clay, light-olive-brown, slightly firm, slightly sticky, slightly plastic, oxidized

Clay, silty, sandy, pebbly, light-olive-brown, slightly firm, slightly sticky, slightly 

plastic, oxidized

Clay, slightly silty, light-olive-brown, soft, sticky, plastic, oxidized

Clay, slightly silty, olive gray

Interbedded clay, silt, and sand

Sand, fine to coarse, pebbly, fine, predominantly shale, subangular to rounded

Silt, clayey, sandy, olive gray; interbedded sand, silty from 74 to 75 feet

Sand, fine and medium, pebbly, fine, mixed mineralogy, subangular to rounded;

detrital lignite; silt, sandy, olive gray from 103 to 108 feet, sand, fine to coarse, 

granular, pebbly, fine from 120 to 140 feet

142-203 61 1,049.23-988.23 Clay, silty, sandy, olive gray, soft, sticky, nonplastic; clay, slightly silty, plastic below

167 feet; clay, silty below 200 feet (lacustrine)

203-227 24 988.23-964.23 Clay, silty, sandy, pebbly, olive gray, slightly firm, slightly sticky, slightly plastic,

occasional cobble (till)

227-240 13 964.23-951.23 Clay, olive black, slightly firm, sticky, plastic, noncalcareous; waxy appearance

(shale)

Well screened from 128 to 133 feet; 2-inch PVC screen and casing

Section A - Geologic Logs 179
Local number: 129N52W14AAA R

Other identifier: 13494

Site identification number: 455932097092401

Date of construction: 10-11 -95

Land surface altitude: 1,220 feet

Total depth: 270 feet

Depth

0-2

2-32

32-52

52-60

60 124

124-218

218-264

Thickness 

(feet)

2

30

20

8

64

94

46

Altitude 

(feet)

1,220-1,218

1,218-1,188

1,188-1,168

1,168-1,160

1,160-1,096

1,096-1,002

1,002-956

Description

Loam, black

Clay, silty, sandy, pebbly, dusky yellow, firm slightly sticky, slightly plastic, oxidized; 

slightly reduced, light-olive-gray with depth

Clay, silty, sandy, pebbly, olive gray, firm, slightly sticky, slightly plastic, reduced

Clay, very silty, olive gray, soft, slightly sticky, nonplastic

Sand, very fine and fine; lignite return

Clay, silty, very sandy, olive gray; lignite return

Clay, silty, sandy, pebbly, olive gray, firm, slightly sticky, nonplastic, rock at 223 feet

264-270

(till)

6 956-950 

Well screened from 78 to 83 feet; 2-inch PVC screen and casing

Clay, slightly silty, olive black, firm, sticky, plastic, noncalcareous; waxy appearance 

(shale)

180 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N52W19ABB R

Other identifier: 13495

Site identification number: 455658097130201

Date of construction: 10-11-95

Land surface altitude: 1,170 feet

Total depth: 220 feet

Depth

0-2

2-12

12-15

15-35

35-89

89-108

108-124

124-132

132-140

140-142

142-202

Thickness 

(feet)

2

10

3

20

54

19

16

8

8

2

60

Altitude 

(feet)

1,170-1,168

1,168-1,158

1,158-1,155

1,155-1,135

1,135-1,081

1,081-1,062

1,062-1,046

1,046-1,038

1,038-1,030

1,030-1,028

1,028-968

Description

Clay loam, black

Clay, slightly silty, slightly sandy, slightly pebbly, dusky yellow, firm, slightly sticky, 

plastic, oxidized

Clay, slightly silty, slightly sandy, slightly pebbly, light-olive-gray, firm, slightly sticky, 

plastic, slightly reduced

Clay, slightly silty, slightly sandy, slightly pebbly, olive gray, firm, sticky, plastic, 

reduced

Clay, silty, sandy, pebbly, olive gray, slightly firm, sticky, plastic; occasional cobble; 

interbedded sand and gravel less than 1-foot beds, from 47 to 56 feet (till)

Sand, fine to coarse, predominantly coarse, gravel fine and medium, mixed mineralogy, 

subangular and subrounded

Sand, fine to coarse, predominantly coarse

Clay, olive gray

Clay, very sandy, olive gray

Sand and gravel

Clay, silty, sandy, pebbly, olive gray, slightly firm; occasional cobble; interbedded sand

202-220 18 968-950

and gravel, less than 1-foot beds, from 142 to 166 feet; very sandy by 166 feet; firm 

by 183 feet (till)

Clay, slightly silty, olive black, firm, sticky, plastic, noncalcareous; waxy appearance 

(shale)

Well screened from 114 to 119 feet; 2-inch PVC screen and casing. Well flowed, less than 1 gallon per minute or about 3.3 feet above 

land surface. Well was plugged by NDSWC on 11-02-95

Section A - Geologic Logs 181
Local number: 129N52W21CCC R

Other identifier: 12277

Site identification number: 455610097110901

Date of construction: 11 -29-88

Land surface altitude: 1,221.2 feet

Total depth: 280 feet

_. .. Thickness Altitude 

Depth (feet) (feet)

0-3

3-16

16-21

21-41

41-59

59-62

62-136

136-186

186-189

189-204

204-223

223-263

263-280

Well screened from

3

13

5

20

18

3

74

50

3

15

19

40

17

128 to

1,221.2-1,218.2

1,218.2-1,205.2

1,205.2-1,200.2

1,200.2-1,180.2

1,180.2-1,162.2

1,162.2-1,159.2

1,159.2-1,085.2

1,085.2-1,035.2

1,035.2-1,032.2

1,032.2-1,017.2

1017.2-998.2

998.2-958.2

958.2-941.2

Description

Topsoil

Clay, silty to pebbly, dark-yellowish-orange, soft, plastic, oxidized (till)

Clay, slightly silty, dark-yellowish-orange, soft, plastic, oxidized (lacustrine)

Sand, fine and medium, granular, subrounded and rounded limestone, shale and 

quartz; interbedded gravel

Silt, slightly clayey, oxidized

Silt, slightly clayey, olive gray

Sand, medium, subrounded and rounded, quartz and carbonate; interbedded 

clay and gravel; contains detrital lignite

Clay, silty and very sandy, olive gray

Gravel, rounded, shale and limestone

sandy

Clay, very sandy, very pebbly, olive gray, nonplastic; interbedded gravel (till)

Clay, very silty, to pebbly, olive gray, soft, slightly plastic (till)

Clay, very silty, very sandy, pebbly, olive gray firm; sand from 252 to 253 feet (till)

Shale, olive black, plastic

133 feet; l'/4-inch PVC screen and casing

182 Hydroiogic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N53W4BAA

Other identifier: 13447

Site identification number: 460117097195801

Date of construction: 8-29-95

Land surface altitude: 1,163 feet

Total depth: 260 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-29 29 1,163-1,134 Clay, silty, sandy, pebbly pale yellow, gray, and brown, oxidized (till)

29-31 2 1,134-1,132 Sand and gravel, sand very fine to very coarse, gravel up to Vi-inch diameter; yellow

stained, oxidized; angular to rounded, quartz, shield silica, carbonate, shale

31 -36 5 1,132-1,127 Sand and gravel, as above, interbedded with till as above

36-85 49 1,127-1,078 Clay, silty, sandy, pebbly, soft, olive gray (till)

85-91 6 1,078-1,072 Till interbedded with shale and carbonaceous sand and gravel

91-172 81 1,072-991 Sand (90%) very fine to very coarse, predominantly medium, and gravel (10%),

predominantly very fine, up to V4-inch diameter; occasional silty clay; clayey silt 

layers where bit slowed; lots of quartz, shale and carbonates, shield silicates, minor 

detrital shale, subangular to well rounded, light bit chatter; at 142 to 144 feet bit 

slowed, silty clay/clayey silt layer

172-192 20 991-971 Silty, clay, slightly sandy (very fine) greenish-gray, bit slowed, soft, drilled smooth, no

chatter, good recovery

192-201 9 971-962 Clay silt, as 172- to 192-foot interval, with sand and gravel layers

201-229 28 962-934 Gravel (50-70%) up to 1-inch diameter, predominantly fine, and sand, very fine to very

coarse, predominantly coarse (30-50%); lots of quartz, shield silica, carbonates, 

shale, some occasional silty clay/clayey silty layers where bit slowed, otherwise 

moderate bit chatter

229-235 6 934-928 Clay, silty, brownish-black, very calcareous, does not appear to be bedrock shale, soft,

greasy

235-260 25 928-903 Clay, black, sticky, noncalcareous, does not effervesce in dilute HC1; ribbon-like sample

returns (Carlile Shale)

Well screened from 204 to 209 feet; 2-inch PVC screen and casing Electric log available

Section A - Geologic Logs 183
Local number: 129N53W7BBA R

Other identifier: 9248

Site identification number: 455842097210301

Date of construction: 12-5-74

Land surface altitude: 1,171 feet

Total depth: 220 feet

Depth

0-1

1-4

4-12

12-66

66-102

102-200

Thickness 

(feet)

1

3

8

54

36

98

Altitude 

(feet)

1,171-1,170

1,170-1,167

1,167-1,159

1,159-1,105

1,105-1,069

1,069-971

Description

Topsoil, silty loam, dusky brown

Clay, silty, sandy, pebbly; grayish-orange; soft, sticky, oxidized (till)

Clay, silty, sandy, pebbly; dark-yellowish-brown; firm plastic, oxidized (till)

Clay, silty, sandy, predominantly very coarse sand grains, pebbly; dark-gray; 

moderately firm, plastic (till)

Clay, silty, sandy, pebbly; olive gray; moderately firm, plastic (till)

Sand, medium-dark-gray, medium to very coarse, angular to round, about 70% quartz,

200-220 20

10% gneiss, 10% carbonates, 8% shale, 2% detrital lignite (some fragments); at 

laminations taking some water

971-951 Pierre Shale, grayish-black; silicaceous, plastic, slightly fissile, noncalcareous

Well screened from 178 to 184 feet; 1'4-inch PVC screen and casing. Electric log available

Local number: 129N53W9AAA R

Other identifier: 9249

Site identification number: 455842097173701

Date of construction: 12-5-74

Land surface altitude: 1,170 feet

Total depth: 240 feet

Depth

0-1

1-6

6-62

62-120

120-180

Thickness 

(feet)

1

5

56

58

60

Altitude 

(feet)

1,170-1,169

1,169-1.164

1,164-1,108

1,108-1,050

1,050-990

Description

Topsoil. silty loam, dusky brown

Clay, silty, sandy, pebbly; grayish-orange, iron stained, moderately firm, plastic, 

oxidized (till)

Clay, silty, sandy, pebbly; dark-gray; moderately firm, plastic, tight; occasional gravel 

lens, boulders (till)

Clay, silty, sandy, pebbly; olive gray; moderately firm, plastic (till)

Silt, slightly sandy, dark-gray; tight, moderate plasticity, thin sand lenses; occasional

light-gray laminae

180-217 37 990-953 Sand, about 5% gravel; fine to coarse; angular to subrounded; about 70% quartz,

10% shale, 10% carbonates, 10% gneiss; silt lenses

217-240 23 953-930 Pierre Shale, silicaceous, dark-gray to grayish-black; noncalcareous, plastic, tight 

Well screened from 198 to 201 feet; IVi-inch PVC screen and casing. Electric log available

184 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N53W11AAA R

Other identifier: 9250

Site identification number: 455844097145701

Date of construction: 12-6-74

Land surface altitude: 1,171 feet

Total depth: 260 feet

Depth T'

0-1

1-4

4-26

26-40

40-82

82-92

92-174

174-230

230-260

Well screened from

lickne!

1

3

22

14

42

10

82

56

30

138 to

ss Altitude 

(feet)

1,171-1,170

1.170-1,167

1,167-1,145

1,145-1,131

1,131-1,089

1,089-1,079

1,079-997

997-941

941-911

Description

Topsoil, silty loam, dusky yellow brown

Clay, silty, sandy, pebbly; medium-yellow-brown; soft, sticky, oxidized (till)

Clay, silty, sandy, pebbly; medium-yellow-brown; firm, plastic, oxidized (till)

Clay, silty, sandy, pebbly; dark-gray; moderately firm, plastic, gravelly (till)

Clay, silty, sandy, pebbly; olive gray, moderately firm, plastic (till)

Sand, very fine to fine, medium-dark-gray; angular to subangular; about 80% quartz, 

10% carbonates, 5% gneiss, 5% shale, trace detrital lignite; micaceous; till lenses

Sand, as above; clean, well sorted, little caving taking very little water (deltaic?)

Silt, olive gray, soft, poor recovery, washing out, sand-gravel lenses (deltaic?)

Pierre Shale; silicaceous; grayish-black; tight, plastic; noncalcareous

141 feet; 114-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 185
Local number: 129N53W25AADA R

Other identifier: R-5

Site identification number: 455559097134401

Date of construction: 9-1-70

Land surface altitude: 1,188 feet

Total depth: 245 feet

Depth

0-11

11-40

40-47

47-55

55-75

75-142

142-151

151-177

177-218

218-245

Thickness 

(feet)

11

29

7

8

20

67

9

26

41

27

Altitude 

(feet)

1,188-1,177

1,177-1,148

1,148-1,141

1,141-1,133

1,133-1,113

1,113-1,046

1,046-1,037

1,037-1,011

1,011-970

970-943

Description

Clay, yellowish-brown, pebbly (till)

Sand, fine to coarse, brown

Sand, fine to coarse, light-gray

Clay, very silty, gray, with very fine sand

Sand, very fine to medium, gray

Clay, quite silty, gray, with very fine sand

Sand, medium to coarse, and gravel

Clay, very silty, gray, with very fine sand and gravel and sand stringers

Clay, calcareous, gray, pebbly, sandy (Niobrara Formation)

Shale, bluish-black (Carlile Shale)

Electric log available

186 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N53W27BBBB R

Other identifier: R-ll

Site identification number: 455606097172501

Date of construction: 9-3-70

Land surface altitude: 1,255 feet

Total depth: 260 feet

Depth

0-12

12-20

20-30

30-50

50-60

60-80

80-90

90-110

110-130

130-140

140-150

150-160

160-170

170-180

180-190

190-203

203-218

218-223

223-242

242-243

243-260

Thickness 

(feet)

12

8

10

20

10

20

10

20

20

10

10

10

10

10

10

13

15

5

19

1

17

Altitude 

(feet)

1,255-1,243

1,243-1,235

1,235-1,225

1,225-1,205

1,205-1,195

1,195-1.175

1,175-1.165

1,165-1,145

1,145-1,125

1,125-1,115

1,115-1,105

1,105-1,095

1,095-1,085

1,085-1,075

1,075-1,065

1,065-1,052

1,052-1,037

1,037-1,032

1,032-1,013

1,013-1,012

1,012-995

Description

Clay, yellowish-brown, pebbly (till)

Sand, medium, some gravel, brown

Sand, coarse some gravel, brown

Sand, medium to coarse, brown

Sand, coarse to very coarse, brown

Sand, medium to coarse, brown, some very coarse from 70 to 80 feet

Sand, coarse to very coarse, brown

Sand, medium to coarse, brown

Sand, coarse to very coarse, gray, some coal from 120 to 130 feet

Sand, fine to medium, gray, some coal

Sand, fine to medium, gray, some coal

Sand, medium, gray, some coal

Sand, medium to coarse, gray, some coal

Sand, fine to medium, gray, much coal

Sand, coarse, gray, some coal

Sand, coarse t very coarse, gray, some coal

Clay, sandy, gray, with pebbles

Sand and gravel, gray

Clay, gray, pebbly (till)

Rocks

Shale, bluish-black

Section A - Geologic Logs 187
Local number: 129N54W1AAA

Other identifier: 13452

Site identification number: 460118097230501

Date of construction: 9-5-95

Land surface altitude: 1,162 feet

Total depth: 231 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-28 28 1,162-1,134 Clay, silty. sandy, pebbly, some cobbles; pale yellow; gray brown with red yellow

stringers; oxidized, soft (till)

28-62 34 1,134-1,100 Clay, as above, olive gray, unoxidized (till)

62-218 156 1,100-944 Sand, very fine to very coarse, predominantly medium coarse (90%) and gravel (10%)

up to abut Vz-inch diameter, mostly less than 0.2-inch diameter, lots of quartz, shield 

silica, carbonates, detrital shale and lignite, subangular to well rounded; takes water; 

some large pebbles sized weathered niobrara shale chunks; at 109 feet, finer section, 

(less than 1% very fine gravel; sand, predominantly fine to medium); At 135 to 

140 feet, slight rig chatter numerous detrital lignite fragments; after about 160 feet, 

finer section, mostly very fine to fine sand, good recovery; at 180 feet mixed one bag 

bentonite

218-220 2 944-942 Silt, clayey, greenish-gray, good recovery, bit slowed, smooth 

220-231 11 942-931 Clay, black, sticky, does not effervesce in dilute HC1, noncalcareous (Carlile Shale) 

IVi-inch PVC casing and 2-inch PVC screen from 195 to 200 feet. Electric log available

188 Hydrologlc and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N54W3ADD R

Other identifier: 12263

Site identification number: 455914097231801

Date of construction: 10-25-82

Land surface altitude: 1,186 feet

Total depth: 200 feet

_ .. Thickness 

Depth (feet)

0-1

1-43

43-120

120-132

132-138

138-140

140-156

156-188

188-200

Well screened from

1

42

77

12

6

2

16

32

12

125 to 128

Altitude 

(feet)

1,186-1,185

1,185-1,143

1,143-1,066

1,066-1,054

1,054-1,048

1,048-1,046

1,046-1,030

1,030-998

998-986

Description

Topsoil

Clay, yellow brown, iron stained, oxidized, silty, sandy, with pebbles (till)

Clay, olive gray, silty, sandy, with pebbles, unoxidized (till) poorly sorted

Sand, fine to coarse, some gravel, predominantly shale, well rounded to subrounded, 

fair sorting

Clay, olive gray, some layers of sand and gravel

Sand, very fine, poor return

Silt, poor return, drills fast, olive gray

Clay, olive gray, silty, sandy, with pebbles (till)

Clay, black, snaps when broken (bedrock)

feet; IVS-inch PVC screen and casing

Section A - Geologic Logs 189
Local number: 129N54W10AAA R

Other identifier: 12264

Site identification number: 455846097231801

Date of construction: 10-26-82

Land surface altitude: 1,186 feet

Total depth: 200 feet

Depth

0-1.5

1.5-18

18-183

183-200

Electric log

Thickness 

(feet)

1.5

16.5

165

17

available

Altitude 

(feet)

1,186-1,184.5

1,184.5-1,168

1,168-1003

1,003-986

Description

Topsoil

Clay, yellow brown; iron stained, silty, sandy, pebbly, oxidized (till)

Clay, olive gray, unoxidized, silty, sandy, pebbly (till), poorly sorted sand lens at 112 to 

113 feet

Clay, black, greasy (bedrock)

Local number: 129N54W1OADD R

Other identifier: 12265

Site identification number: 455821097231801

Date of construction: 10-26-82

Land surface altitude: 1,232 feet

Total depth: 200 feet

Depth

0-2

2-13

13-53

53-69

69-94

94-97

97-190

190-200

Thickness 

(feet)

2

11

40

16

25

3

93

10

Well screen from 58 to 63 feet; 

available

Altitude 

(feet)

1,232-1,230

1,230-1,219

1,219-1,179

1,179-1,163

1,163-1,138

1,138-1,135

1,135-1,042

1,042-1,032

Description

Topsoil

Clay, yellow brown, oxidized, iron stained, silty, sandy, pebbly (till)

Clay, olive gray, silty, sandy, pebbly (till)

Sand, medium to coarse with some pebble gravel, well rounded to subrounded, fair 

sorting, predominantly shale with 10% carbonates and igneous; also a couple of clay

seams

Till, as above

Sand, drills fast, poor return, predominantly shale, composition unknown due to upper

sands

Till, as above

Clay, black, greasy, peels off like bacon (bedrock) some siltstone

l!/2-inch PVC screen and casing. Well was flowing so it was plugged with grout on 11-16-82. Electric log

190 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 129N54W25AAAA R

Other identifier: R-12

Site identification number: 455607097211501

Date of construction: 9-4-70

Land surface altitude: 1,260 feet

Total depth: 230 feet

Depth

0-3

3-33

33-120

120-160

160-173

173-213

213-230

Thickness 

(feet)

3

30

87

40

13

40

17

Altitude 

(feet)

1,260-1,257

1,257-1,227

1,227-1,140

1,140-1,100

1,100-1,087

1,087-1,047

1,047-1,030

Description

Topsoil, black

Yellow brown clay, fatty

Clay, gray; 6- to 8-inch gravel stringer at 87 feet

Gravel

Silty (till), smooth cutting, gravel stringer at

Silt; rock at 21 3 feet

Shale cuttings

173 feet

Local number: 129N54W27BBBB R

Other identifier: R-13

Site identification number: 455607097245701

Date of construction: 9-8-70

Land surface altitude: 1,365 feet

Total depth: 110 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-5 5 1,365-1,360 Mostly gravel, some clay

5-15 10 1,360-1,350 Clay, yellow, very gravelly

15-35 20 1,350-1,330 Clay, gray, very silty

35-100 65 1,330-1,265 Clay, whitish-gray (drills and looks like shale)

100-110 10 1,265-1,255 Shale, dark-gray

Section A - Geologic Logs 191
Local number: 129N54W29CCC

Other identifier: 9244

Site identification number: 455659097291601

Date of construction: 12-3-74

Land surface altitude: 1,520 feet

Total depth: 40 feet

Depth

0-4

4-12

12-15

15-40

Thickness 

(feet)

4

8

3

25

Altitude 

(feet)

1,520-1,516

1,516-1,508

1,508-1,505

1,505-1,480

Description

Clay, very silty, sandy, pebbly; moderately yellow brown; soft, sticky, oxidized (till)

Clay, silty, sandy, pebbly; dark-yellow-brown; firm, moderately plastic, oxidized (till)

Clay, silty, sandy, pebbly; dark-gray, moderately plastic (till)

Pierre Shale; grayish-black; (brittle upper contact), tight, moderately plastic, 

noncalcareous, bentonitic

Local number: 130N54W27CCC R

Other identifier: 12261

Site identification number: 460033097245701

Date of construction: 9-21-82

Land surface altitude: 1,180 feet

Total depth: 190 feet

_ .. Thickness Altitude 

Depth (feet) (feet)

0-1

1-27

27-101

101-112

112-141

141-170

170-176

176-190

Well screened from

1

26

74

11

29

29

6

14

158to

1,180-1,179

1,179-1,153

1,153-1,079

1,079-1,068

1,068-1,039

1,039-1,010

1,010-1,004

1,004-990

Description

Topsoil

Clay, yellow brown, oxidized, iron stains, silty, sandy, pebbly (till)

Clay, olive gray, silty, sandy, pebbly (till); rock at 80 feet, put rock bit on

Sand and gravel, coarse sand to medium gravel, predominantly very coarse sand, 

angular to rounded, predominantly rounded, predominantly quartz, some very coarse 

detrital lignite

Till, olive gray clay, slightly pebbly, cohesive and plastic

Sand, fine to medium grain, predominantly medium, predominantly rounded, 

interbedded with sandy and/or silty clay and lenses of coarse detrital lignite; below 

153 feet, appears to be strictly medium sand, no clay; below 164 feet, interbedded 

clay and detrital lignite

Till, brownish- to olive-gray, silty and pebbly, moderately cohesive

Bedrock shale, dark-gray to black, interbedded with dark-gray clayey siltstone

163 feet; IVi-inch PVC screen and casing. Electric log available

192 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 130N54W32CCC R

Other identifier: 9246

Site identification number: 455909097272801

Date of construction: 12-4-74

Land surface altitude: 1,187 feet

Total depth: 180 feet

Depth

2-0

2-6

6-23

23-70

70-151

151-159

159-180

Thickness 

(feet)

2

4

17

47

81

8

21

Altitude _ ._. 

(feet) Descr,pt,on

1,187-1,185 Topsoil. silty, loam; dusky yellow brown

1,185-1,181 Clay, silty, sandy, pebbly; grayish-orange, soft, sticky, oxidized (till)

1,181-1,164 Clay, silty, sandy, pebbly; dark-yellow orange; firm, plastic, iron stained: oxidized (till)

1 , 1 64- 1,117 Clay, very silty, sandy, few pebbles, very coarse sand grains ; dark-gray ; moderately soft, 

plastic, occasional thin gravel lenses (till)

1,117-1,036 Clay, silty, sandy, pebbly, olive gray; moderately firm, moderately plastic (till)

1,036-1,028 Clay, silty, very sandy, pebbly; dark-gray; firm, tight, slightly friable; gravel lenses (till)

1,028-1,007 Pierre Shale; gray, slightly black, plastic, tight, noncalcareous, very slightly fissile

Electric log available

Local number: 130N54W33DDD R

Other identifier: 12262

Site identification number: 455909097245901

Date of construction: 9-22-82

Land surface altitude: 1,158 feet

Total depth: 200 feet

_ _ Thickness 

Depth (feet)

0-1

1-10

10-27

27-120

120-129

129-172

172-183

183-200

Well screened from

1

9

17

93

9

43

11

17

138 to 145

Altitude 

(feet)

1,158-1,157

1,157-1,148

1,148-1,131

1,131-1,038

1,038-1,029

1,029-986

986-975

975-958

Description

Topsoil

Till, yellow brown, oxidized, silty, very pebbly; cohesive, plastic

Till, yellow brown, oxidized, slightly silty, slightly pebbly, very clayey; cohesive, 

slightly brittle; at 18 feet, color becomes dark-brown, still oxidized

Till, olive gray, silty, pebbly, moderately cohesive, moderately plastic, below 60 feet till 

seems softer, more pliable, same composition; at 116 to 120 feet, becomes gravelly

Till, olive gray, silty, pebbly, very cohesive, tight, plastic

Sand and gravel, coarse sand to medium gravel, predominantly very coarse sand and 

fine gravel, angular to rounded, predominantly subangular, equal proportions quartz, 

shale and carbonates; below 140 feet becomes more rounded and spherical

Till? no sample

Bedrock shale, dark-gray to black, slightly carbonaceous, silty

feet; IVi-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 193
Local number: 130N54W34DCC R

Other identifier: 12267

Site identification number: 455941097241701

Date of construction: 10-26-82

Land surface altitude: 1,155 feet

Total depth: 180 feet

Depth

0-1

1-11

11-107

107-118

118-136

136-150

Thickness 

(feet)

1

10

96

11

18

14

Altitude 

(feet)

1,155-1,154

1,154-1,144

1,144-1,048

1,048-1,037

1,037-1,019

1,019-1005

Description

Topsoil

Clay, yellow brown, iron stained, oxidized, silty, sandy with pebbles (till) |

Clay, olive gray, unoxidized, silty, sandy with pebbles ("till), layer of sand and gravel at 

104 to 105 feet

Till with numerous layers of shale sand and gravel; drills slow then fast in 1- to 2-foot

increments

Gray till as above, rocky

Gravel, pebbly, subrounded, some medium to coarse sand, 30% shale, 40% carbonates,

30% igneous, drills choppy and fast

150-170 20 1005-985 Silt, olive gray, poor return, drills real smooth and fast, could be some very fine sands

mixed in

170-180 10 985-975 Clay, blackish, greasy, bedrock?, lost circulation, put soap in and gained circulation;

poor return?

Well screened from 145 to 150 feet; 1'/4-inch PVC screen and casing. Electric log available

194 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Local number: 130N54W35CCC R

Other identifier: 9247

Site identification number: 455941097234001

Date of construction: 12-4-74

Land surface altitude: 1,170 feet

Total depth: 240 feet

Depth Thickness 

(feet)

Altitude 

(feet) Description

0-4 4 1,170-1,166 Clay, silty, sandy, pebbly; dark-yellow-orange, soft, sticky, oxidized (till) 

4-27 23 1,166-1,143 Clay, silty, sandy, pebbly; dark-yellow-brown; firm, plastic, tight, oxidized (till)

27-68 41 1,143-1,102 Clay, silty, sandy, pebbly; dark-gray; firm moderately plastic, tight (till); occasional thin

gravel lens

68-96 28 1,102-1,074 Clay, silty, sandy, pebbly; olive gray; moderately soft, plastic; gravel lenses; larger

pebbles (till)

96-118 22 1,074-1,052 Clay, silty, sandy, pebbly; dark-gray to grayish-black, moderately firm, plastic,

numerous thin gravel lenses (till)

118-130 12 1,052-1,040 Sand and gravel; sand medium to very coarse, angular to subrounded, about 60%

quartz, 30% carbonates, 5% shale, 5%gneiss; gravel, fine to coarse, angular to 

subrounded, about 70% gneiss, 10% quartz, 10% shale, 10% carbonates, clean sorted

130-134 4 1,040-1,036 Clay, very silty, sand, very coarse sand grains; dark-gray; soft, plastic (till)

134-150 16 1,036-1,020 Clay, dark-gray, noncalcareous; light-gray mottling (calcareous), tight, plastic; weak

laminae (lacustrine)

150-174 24 1,020-9% Clay, as above with sand lenses

174-200 26 996-970 Sand and gravel, dark-gray sand, medium to very coarse, angular to round; gravel, fine

to medium, angular to subround, about 60% quartz, 30% shale, 10% carbonates, 

igneous, and moderate lignite fragments

200-218 18 970-952 Clay, silty, slightly sandy, occasional coarse sand grains; grayish-black, calcareous, very

plastic, soft (glaciofluvial - silt/till?)

218-240 22 952-930 Pierre Shale, grayish-black; noncalcareous, tight, plastic, stiff

Well screened from 188 to 191 feet; IVi-inch PVC screen and casing. Electric log available

Section A - Geologic Logs 195

Section B - Hydrographs

I

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WATER LEVEL, IN FEET ABOVE (+) 

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WATER LEVEL, IN FEET 

ABOVE SEA LEVEL

oo

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w wW to
Site number from location map: 3 

Local well number: 119N52W4ADDD R 

Station identification number: 450655097092301 

Other identifier: CD-77B 

County: Codington, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,770 feet 

Measuring point: 2.4 feet

Extremes: December 1, 1977, to October 6, 1999: Highest, 1.9 feet, July 2, 1991; lowest, 7.67 feet, December 1, 

1988.

h- LLJ 0

LU O

LU <

LL LL

Z § 2

_,- CO 

UJ §!' D

rl 6

§B!

s ID 8

n i i i i r

i i i i i i i i i i i i i i i i i i i i i i

1770

1,768

1,766 > J0

_l LU

1,764 m O

1- CD

1,762

D J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B3. Hydrograph for observation well 119N52W4ADDD R (site number 3).

Site number from location map: 4 

Local well number: 119N52W10DDDD R 

Station identification number: 450538097083901 

Other identifier: CD-77C 

County: Codington, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,770 feet 

Measuring point: 3.6 feet

Extremes: December 1,1977, to October 6,1999: Highest, 1.0 foot, June 23,1994; lowest, 9.2 feet, December 29, 

1981.

1.770 K

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B4. Hydrograph for observation well 119N52W10DDDD R (site number 4).

,762

200 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 5 

Local well number: 119N52W33DCDC R 

Station identification number: 450208097101401 

Other identifier: CD-60A 

County: Codington, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,745 feet 

Measuring point: 1.9 feet

Extremes: June 13, 1960, to October 7, 1999: Highest, 2.80 feet, Apr. 30, 1997; lowest, 10.6 feet, November 1, 

1990.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND ' 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B5. Hydrograph for observation well 119N52W33DCDC R (site number 5).

1,737

Site number from location map: 6 

Local well number: 119N53W6BBBB 

Station identification number: 450904097145501 

Other identifier: R2-85-111 

County: Codington, South Dakota 

Aquifer: Altamont 

Altitude of land surface: 1,878 feet 

Measuring point: 1.9 feet

Extremes: April 30,1997, to August 31,1999: Highest, 118.71 feet, April 1,1999; lowest, 120.14feet, August 25, 

1997.

LLJ < 

LL LL

"9

120

121

\ \ \ \ I I I I \

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1,760 K 

111

1,759

111 

HI

< 

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DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B6. Hydrograph for observation well 119N53W6BBBB (site number 6).

1758 B5 g

i_ CD

1,757

Section B - Hydrographs 201
Site number from location map: 7 

Local well number: 120N51W19BBCC R 

Station identification number: 450947097060901 

Other identifier: GT-77A 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,894.99 feet 

Measuring point: 2.0 feet

Extremes: July 20, 1977, to October 6, 1999: Highest, 75.5 feet, November 8, 1995; lowest, 121.5 feet, July 29, 

1988.

D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D 

1996 1997 1998 1999

CALENDAR YEAR

Site number from location map: 8 

Local well number: 120N52W9BBBB R 

Station identification number: 451143097110501 

Other identifier: GT-79C 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,834 feet 

Measuring point: 1.4 feet

Extremes: October 25,1979, to October 6, 1999: Highest, 14.5 feet, June 6.1996; lowest, 26.2 feet, September 7, 

1988.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,814

CALENDAR YEAR 

Figure B8. Hydrograph for observation well 120N52W9BBBB R (site number 8).

202 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 11 

Local well number: 120N52W27CDDD R 

Station identification number: 450814097091601 

Other identifier: CD-76D 

County: Codington, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,800 feet 

Measuring point: 4.6 feet

Extremes: June 16,1976, to November 30, 1999: Highest, -4.7 feet, November 8,1995; lowest, 52.1 feet, July 29, 

1988.

,820

LLJ LU

LiJ CC 40 .

h-O DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND

1997 1998 1999

CALENDAR YEAR 

Figure B11. Hydrograph for observation well 120N52W27CDDD R (site number 11).

Site number from location map: 12 

Local well number: 120N52W28DDDD R 

Station identification number: 450814097095301 

Other identifier: CD-56A 

County: Codington, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,781.62 feet 

Measuring point: 1.6 feet

Extremes: August 29, 1957, to October 6, 1999: Highest, 4.4 feet, July 2, 1991; lowest, 11.6 feet, December 7, 

1966.

D J FMAMJ J ASONDJFMAMJ JASONDJ FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B12. Hydrograph for observation well 120N52W28DDDD R (site number 12).

204 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 13 

Local well number: 120N54W23DDDC 

Station identification number: 451050097161601 

Other identifier: DA-78H 

County: Day, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,830 feet 

Measuring point: 3.0 feet

Extremes: October 16,1978, to October 6,1999: Highest, 41.7 feet, October 6,1999; lowest, 56.2 feet, August 4, 

1982, October3, 1983.

LLJ 

CO 44

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND ' 

1996 1997 1998 1999

1,786

CALENDAR YEAR 

Figure B13. Hydrograph for observation well 120N54W23DDDC (site number 13).

Site number from location map: 14 

Local well number: 121N47W1AAAA 

Station identification number: 451936096294001 

Other identifier: CO-86-03 

County: Grant, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,092 feet 

Measuring point: 3.0 feet

Extremes: December 11,1996, to August 25, 1999: Highest, 50.8 feet, June 20, 1997; lowest, 54.77 feet, July 20, 

1998.

LLJ 

CO 56

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B14. Hydrograph for observation well 121N47W1AAAA (site number 14).

Section B - Hydrographs 205
Site number from location map: 15 

Local well number: 121N47W2DDDD 

Station identification number: 451844096305401 

Other identifier: CO-86-05 

County: Grant, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,115 feet 

Measuring point: 3.0 feet

Extremes: April 29, 1997, to August 25,1999: Highest, 45.13 feet, June 20, 1997; lowest, 48.03 feet, August 25, 

1999.

LU 44 

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LU 

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1996 1997 1998 1999

1,071

1,069

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LU LU 

LU

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LU

1,067 .>

1,065

CALENDAR YEAR 

Figure B15. Hydrograph for observation well 121N47W2DDDD (site number 15).

Site number from location map: 16 

Local well number: 121N47W6CCCC 

Station identification number: 451848096363501 

Other identifier: GT-79E 

County: Grant, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1 ,104.00 feet 

Measuring point: 2.8 feet

Extremes: October 25,1979, to October 5, 1999: Highest, 19.22 feet: Apr. 29,1997; lowest, 38.4 feet, October 4, 

1983, November 8, 1983.

LU

m 30

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B16. Hydrograph for observation well 121N47W6CCCC (site number 16).

206 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 17 

Local well number: 121N51W29BBBB R 

Station identification number: 451418097045501 

Other identifier: GT-77E 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,955 feet 

Measuring point: 3.6 feet

Extremes: May 2, 1978, to October 6, 1999: Highest, 73.5 feet, June 6, 1996; lowest, 84.72 feet, September 26, 

1988.

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1,881

- 1,880

- 1,879

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LU LU 

LU

is

77

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,878

CALENDAR YEAR 

Figure B17. Hydrograph for observation well 121N51W29BBBB R (site number 17).

Site number from location map: 18 

Local well number: 121N52W1CBBB R 

Station identification number: 451725097072101 

Other identifier: GT-57A 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,885 feet 

Measuring point: 1.75 feet

Extremes: April 29, 1997, to October 6, 1999: Highest, 4.16 feet, April 29, 1997; lowest, 10.3 feet, October 6, 

1999

D J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B18. Hydrograph for observation well 121N52W1CBBB R (site number 18).

1,873

Section B - Hydrogrephs 207
Site number from location map: 19

Local well number: 121N52W2ADDD R

Station identification number: 451606097072501

Other identifier: GT-82A

County: Grant, South Dakota

Aquifer: Big Sioux

Altitude of land surface: 1,881.25 feet

Measuring point: 3.2 feet

Extremes: June 29, 1982, to October 6, 1999: Highest, 0.92 foot, April 29, 1997; lowest, 6.7 feet, July 30, 1998.

m

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B19. Hydrograph for observation well 121N52W2ADDD R (site number 19).

Site number from location map: 20 

Local well number: 121N52W2BAAA R 

Station identification number: 451749097080601 

Other identifier: R20-84-31 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,87 8.4 feet 

Measuring point: 3.0 feet

Extremes: April 29, 1997, to August 26, 1999: Highest, -0.49 foot, April 17, 1998; lowest, 2.07 feet, August 18, 

1998.

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1,878

1,876

ID

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5 1996 1997 1998 1999

CALENDAR YEAR 

Figure B20. Hydrograph for observation well 121N52W2BAAA R (site number 20).

i_ CO I"

208 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 21 

Local well number: 121N52W2BBBA R 

Station identification number: 451750097083001 

Other identifier: CO-87-66 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,885 feet 

Measuring point: 2.6 feet

Extremes: April 29, 1997, to August 26, 1999: Highest, 23.03 feet, May 28, 1998; lowest 26.37 feet, August 26, 

1999.

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LU D

LU 

CD

24

28

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1996 1997 1998 1999

LU 

1,862 LL

1,860

1,858

CALENDAR YEAR 

Figure B21. Hydrograph for observation well 121N52W2BBBA R (site number 21).

Site number from location map: 22 

Local well number: 121N52W2CCCC R 

Station identification number: 451701097083701 

Other identifier: R20-84-26 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,869 feet 

Measuring point: 2.0 feet

Extremes: April 29,1997, to August 26,1999: Highest, 0.21 foot, February 26,1998; lowest, 8.64 feet, August 26, 

1999.

- 1,867

LU 

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LU

1,865 r-J <

LU LU

m W

1,863 3 LU

1,861 K 8

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B22. Hydrograph for observation well 121N52W2CCCC R (site number 22).

1,859 r

Section B - Hydrographs 209
Site number from location map: 23 

Local well number: 121N52W3CCBB R 

Station identification number: 451716097095901 

Other identifier: R20-84-25 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,857.9 feet 

Measuring point: 3.0 feet

Extremes: April 29, 1997, to August 26, 1999: Highest, 6.74 feet, April 29, 1997; lowest, 12.8 feet, August 26, 

1999.

= 1.850

in

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B23. Hydrograph for observation well 121N52W3CCBB R (site number 23).

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I <

Site number from location map: 24 

Local well number: 121N52W4BBAB R 

Station identification number: 451749097105501 

Other identifier: R20-84-27 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,843.7 feet 

Measuring point: 2.8 feet

Extremes: December 11, 1996, to August 26, 1999: Highest, 3.1 feet, April 29, 1997; lowest 13.81 feet, 

December 11, 1996.

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B24. Hydrograph for observation well 121N52W4BBAB R (site number 24).

210 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 25 

Local well number: 121N52W8DCCCR 

Station identification number: 451608097114101 

Other identifier: GT-77B 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,831.17 feet 

Measuring point: 2.6 feet

Extremes: December 1, 1977, to October 6, 1999: Highest, 4.7 feet, April 29, 1997; lowest, 9.8 feet, October 20, 

1981.

H in 4

mo

LU

LU

CD 12

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1996 1997 1998 1999

LU 

1,826 LL

1,824

1.822

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1,820 <

CALENDAR YEAR 

Figure B25. Hydrograph for observation well 121N52W8DCCC R (site number 25).

Site number from location map: 26 

Local well number: 121N52W8DDDD R 

Station identification number: 451608097110801 

Other identifier: R20-84-30 

County: Grant, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,839.2 feet 

Measuring point: 3.0 feet

Extremes: April 29, 1997, to August 20, 1999: Highest, 11.39 feet, April 29,1997; lowest 15.08 feet, August 20, 

1999.

LU

CD 16

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B26. Hydrograph for observation well 121N52W8DDDD R (site number 26).

Section B - Hydrographs 211
Site number from location map: 27 

Local well number: 121N52W13BBBA R 

Station identification number: 451605097071701 

Other identifier: GT-79A 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,916.87 feet 

Measuring point: 2.2 feet

Extremes: June 9, 1982, to October 6, 1999: Highest, 66.6 feet, September 8, 1992; lowest, 85.4 feet, August 25, 

1988.

- 1,850 

1,845

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95

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1996 1997 1998 1999

1,825 < <

CALENDAR YEAR 

Figure B27. Hydrograph for observation well 121N52W13BBBA R (site number 27).

Site number from location map: 28 

Local well number: 121N52W22CCCC R 

Station identification number: 451423097095201 

Other identifier: GT-77C 

County: Grant, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,837 feet 

Measuring point: 3.0 feet

Extremes: December I, 1977, to October 6, 1999: Highest, 2.9 feet, June 5, 10, 15, 1996; lowest, 20.8 feet, 

August 25, 1988.

DJFMAMJJASOND JFMAMJJASOND JFMAMJJASOND

18 1997 1998

CALENDAR YEAR 

Figure B28. Hydrograph for observation well 121N52W22CCCC R (site number 28).

1999

212 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Altitude oflandsurface: 1,860Measuring point:1.6 feetExtremes: December 1,977,1 

1988.

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Site number from location map: 31 

Local well number: 121N54W34AADA 

Station identification number: 451506097170401 

Other identifier: DA-78E 

County: Day, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,803 feet 

Measuring point: 3.0 feet

Extremes: September 27, 1978, to October 6,1999: Highest, 4.5 feet, June 4.1998; lowest. 24.7 feet, August 19, 

1982.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B31. Hydrograph for observation well 121N54W34AADA (site number 31).

1,793

Site number from location map: 32 

Local well number: 122N47W35DDCD 

Station identification number: 451935096310001 

Other identifier: R2-85-28 

County: Roberts, South Dakota 

Aquifer: Wilmot

Altitude of land surface: 1,100 feet 

Measuring point: 3.0 feet

Extremes: December 11,1996, to August 25, 1999: Highest, 23.53 feet, August 25,1999; lowest, 26.82, April 1, 

1999.

51

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1996 1997 1998 1999

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1,072

CALENDAR YEAR 

Figure B32. Hydrograph for observation well 122N47W35DDCD (site number 32).

214 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 33 

Local well number: 122N48W13DDDD2 

Station identification number: 452211096365902 

Other identifier: R2-98-15 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,085.9 feet 

Measuring point: 2.25 feet

Extremes: April 1, 1999, to September 13, 1999: Highest, 18.96 feet, April 1, 1999; lowest, 19.89 feet, 

September 13, 1999.

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Figure B33. Hydrograph for observation well 122N48W13DDDD2 R (site number 33).

Site number from location map: 34 

Local well number: 122N49W7BBBB 

Station identification number: 452352096513901 

Other identifier: RB-77N 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,199.9 feet 

Measuring point: 1.7 feet

Extremes: November 30,1977, to October 5,1999: Highest, 23.74 feet, April 29,1997; lowest, 43.2 feet, July 28, 

1988.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B34. Hydrograph for observation well 122N49W7BBBB (site number 34).

-=> 1,165

Section B - Hydrographs 215
Site number from location map: 35 

Local well number: 122N49W17AAAD 

Station identification number: 452257096491801 

Other identifier: RB-77P 

County: Roberts, South Dakota 

Aquifer: Wilmot

Altitude of land surface: 1,163.9 feet 

Measuring point: 2.4 feet

Extremes: November 30, 1977, to October 5, 1996: Highest, 6.7 feet, April 26, 1994; lowest, 12.1 feet, 

September 8, 1988.

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B35. Hydrograph for observation well 122N49W17AAAD (site number 35).

Site number from location map: 36 

Local well number: 122N49W18AAAA 

Station identification number: 452302096503101 

Other identifier: RB-77O 

County: Roberts, South Dakota 

Aquifer: Wilmot

Altitude of land surface: 1,184.2 feet 

Measuring point: 1.5 feet

Extremes: November 30, 1977, to October 5,1999: Highest, 8.16 feet, Apr. 29, 1997; lowest, 25.8 feet, July 28, 

1988.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B36. Hydrograph for observation well 122N49W18AAAA (site number 36).

216 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 37 

Local well number: 122N49W30BBBB 

Station identification number: 452117096514201 

Other identifier: RB-77Q 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,248.3 feet 

Measuring point: 1.0 foot

Extremes: November 30, 1977, to October 5, 1999: Highest, 42.02 feet, May 21, 1997; lowest, 49.1 feet, 

August 18, 1982, September 1, 1982.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B37. Hydrograph for observation well 122N49W30BBBB (site number 37).

Site number from location map: 38 

Local well number: 122N50W13DDDC 

Station identification number: 452210096514701 

Other identifier: R2-97-46 

County: Roberts, South Dakota 

Aquifer: Wilmot

Altitude of land surface: 1,228 feet 

Measuring point: 1.5 feet

Extremes: October 23,1997, to August 25,1999: Highest 19.52 feet, May 28,1998; lowest 21.36 feet, October 23, 

1997.

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1,217

1.216

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CALENDAR YEAR 

Figure B38. Hydrograph for observation well 122N50W13DDDC (site number 38).

Section B - Hydrographs 217
Site number from location map: 39 

Local well number: 122N51W4DDDD2 R 

Station identification number: 452212097022702 

Other identifier: R2-99-11 

County: Roberts, South Dakota 

Aquifer: Eden

Altitude of land surface: 1,962.2 feet 

Measuring point: 2.0 feet

Extremes: September 14, 1999, to December 12, 1999: Highest, 208.35 feet, September 14, 1999; lowest, 

208.73 feet, December 8, 1999.

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1997 1998 1999

CALENDAR YEAR 

Figure B39. Hydrograph for observation well 122N51W4DDDD2 R (site number 39).

Site number from location map: 40 

Local well number: 122N51W27BBBB2 R 

Station identification number: 451936097022602 

Other identifier: R2-98-27 

County: Roberts, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 2,025.4 feet 

Measuring point: 2.25 feet

Extremes: March 11, 1999, to September 14, 1999: Highest, 220.92 feet, March 11, 1999; lowest 221.01 feet, 

September 14, 1999.

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Figure B40. Hydrograph for observation well 122N51W27BBBB2 R (site number 40). 

Site number from location map: 41

218 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 43 

Local well number: 122N52W2BBBB R 

Station identification number: 452304097083901 

Other identifier: RB-77T 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,910.9 feet 

Measuring point: 2.1 feet

Extremes: November 30, 1977, to October 5, 1999: Highest, 10.02 feet, April 30, 1997; lowest, 23.20 feet, 

November 30,1977.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B43. Hydrograph for observation well 122N52W2BBBB R (site number 43).

Site number from location map: 44 

Local well number: 122N52W3ABBB R 

Station identification number: 452304097091501 

Other identifier: CO-93-36 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,908 feet 

Measuring point: 2.3 feet

Extremes: December 12, 1996, to August 26, 1999: Highest, 12.0 feet, April 30, 1997; lowest 16.29 feet, 

February 26, 1998.

1.898

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1996 1997 1998 1999

1,890

CALENDAR YEAR 

Figure B44. Hydrograph for observation well 122N52W3ABBB R (site number 44).

220 Hydrologlc and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 47 

Local well number: 122N52W5CCCC R 

Station identification number: 452215097121801 

Other identifier: RB-77R 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,871.7 feet 

Measuring point: 1.5 feet

Extremes: November 30, 1977, to October 6, 1999: Highest, 7.85 feet, April 30, 1997; lowest, 16.4 feet, April 1, 

1982.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B47. Hydrograph for observation well 122N52W5CCCC R (site number 47).

Site number from location map: 48 

Local well number: 122N52W9AAAA2 R 

Station identification number: 452213097095602 

Other identifier: CO-93-31 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,872 feet 

Measuring point: 2.1 feet

Extremes: December 12, 1996, to August 26, 1999: Highest, 1.42 feet. February 26, 1998: lowest, 3.17 feet, 

August 26, 1999.

1,871

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B48. Hydrograph for observation well 122N52W9AAAA2 R (site number 48).

1,868

222 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 49 

Local well number: 122N52W11BBBB R 

Station identification number: 452212097083901 

Other identifier: RB-93C 

County: Roberts, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,921 feet 

Measuring point: 2.3 feet

Extremes: December 12, 1996, to October 6, 1999: Highest, 37.18 feet, May 21, 1997; lowest 39.82 feet, 

February 26, 1998.

1,884

1,883

- 1,882

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1996 1997 1998 1999

,881

CALENDAR YEAR 

Figure B49. Hydrograph for observation well 122N52W11BBBB R (site number 49).

Site number from location map: 50 

Local well number: 122N52W12CCCC R 

Station identification number: 452122097072301 

Other identifier: RB-76B 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,904.9 feet 

Measuring point: 2.3 feet

Extremes: December 1, 1976, to October 9, 1996: Highest, -1.08 feet, March 26, 1998; lowest, 13.0 feet, May 7, 

1991.

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^ 1996 1997 1998 1999

CALENDAR YEAR 

Figure B50. Hydrograph for observation well 122N52W12CCCC R (site number 50).

Section B - Hydrographs 223
Site number from location map: 51 

Local well number: 122N52W14BBBB R 

Station identification number: 452119097083901 

Other identifier: RB-76A 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,897.9 feet 

Measuring point: 2.9 feet

Extremes: December 1, 1976, to October 6, 1999: Highest, 10.1 feet, October 21, 1993; lowest, 22.8 feet, 

October 11, 1983, November 9, 1983.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B51. Hydrograph for observation well 122N52W14BBBB R (site number 51).

Site number from location map: 52 

Local well number: 122N52W16BBBC R 

Station identification number: 452115097110601 

Other identifier: RB-82B 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,855.5 feet 

Measuring point: 2.7 feet

Extremes: June 29, 1982, to October 6, 1999: Highest, 12.1 feet, August 4, 1993; lowest, 14.8 feet, October 11, 

1983.

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1996 1997 1998 1999

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1,842

in

CALENDAR YEAR 

Figure B52. Hydrograph for observation well 122N52W16BBBC R (site number 52).

224 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 53 

Local well number: 122N52W27BBBB2 R 

Station identification number: 451934097095302 

Other identifier: R2-98-30 

County: Roberts, South Dakota 

Aquifer: Lonesome Lake 

Altitude of land surface: 1,878.4 feet 

Measuring point: 2.3 feet

Extremes: March 11, 1999, to September 14, 1999: Highest, 51.14 feet, March 11, 1999; lowest, 51.54 feet, 

September 14, 1999.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B53. Hydrograph for observation well 122N52W27BBBB2 R (site number 53).

Site number from location map: 54 

Local well number: 122N52W32AAAA R 

Station identification number: 451841097110901 

Other identifier: RB-77S 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,851.7 feet 

Measuring point: 1.8 feet

Extremes: May 23, 1978, to October 6, 1999: Highest, 7.6 feet, August 4, 1993; lowest, 12.0 feet, October 21, 

1981.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B54. Hydrograph for observation well 122N52W32AAAA R (site number 54).

Section B - Hydrographs 225
Site number from location map: 55 

Local well number: 122N52W36BCCB2 R 

Station identification number: 451822097072401 

Other identifier: R20-84-34 

County: Roberts, South Dakota 

Aquifer: Big Sioux 

Altitude of land surface: 1,888 feet 

Measuring point: 3.0 feet

Extremes: April 29, 1997, to August 26, 1999: Highest, 0.76 feet, March 27, 1998; lowest, 4.33 feet, August 26, 

1999.

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1996 1997 1998 1999

1,888

1,886

LU

LU

1,882

CALENDAR YEAR 

Figure B55. Hydrograph for observation well 122N52W36BCCB2 R (site number 55).

Site number from location map: 56 

Local well number: 122N53W11DDDD R 

Station identification number: 452120097145001 

Other identifier: DA-78D 

County: Day, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,830 feet 

Measuring point: 2.8 feet

Extremes: September 27, 1978, to October 6, 1999: Highest, 0.99 foot. February 26, 1998; lowest, 10.5 feet, 

September 1, 1982.

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1996 1997 1998 1999

1,827

CALENDAR YEAR 

Figure B56. Hydrograph for observation well 122N53W11DDDD R (site number 56).

226 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 59 

Local well number: 123N50W23AAAA 

Station identification number: 452721096525701 

Other identifier: RB-77L 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,175.2 feet 

Measuring point: 3.5 feet

Extremes: November 30, 1977, to October 5, 1999: Highest, -3.5 feet, June 17, 1998; lowest, 16.0 feet, July 28, 

1988.

1,180

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CALENDAR YEAR 

Figure B59. Hydrograph for observation well 123N50W23AAAA (site number 59).

Site number from location map: 60 

Local well number: 123N50W35AAAA 

Station identification number: 452537096525701 

Other identifier: RB-77M 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,216.1 feet 

Measuring point: 2.3 feet

Extremes: November 30, 1977, to October 5, 1999: Highest, 39.91 feet, March 11, 1997; lowest, 59.1 feet, 

July 29, 1988.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B60. Hydrograph for observation well 123N50W35AAAA (site number 60).

228 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Robarts County Investigation
Site number from location map: 61 

Local well number: 123N51W21DDDD2 R 

Station identification number: 452218097022902 

Other identifier: R20-99-48 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,819.4 feet 

Measuring point: 2.0 feet

Extremes: September 14,1999, to December 8, 1999: Highest 26.86 feet, September 14,1999; lowest, 27.23 feet, 

December 8, 1999.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B61. Hydrograph for observation well 123N51W21DDDD2 R (site number 61).

1,792.0

Site number from location map: 62 

Local well number: 123N52W6DDDA R 

Station identification number: 452728097122401 

Other identifier: CO-93-28 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,870 feet 

Measuring point: 2.0 feet

Extremes: April 30, 1997, to August 26, 1999: Highest, 0.08 foot, February 26, 1998; lowest, 0.91 foot, 

September 18, 1997.

1,870.0

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1996 1997 1998 1999

1,869.0

CALENDAR YEAR 

Figure B62. Hydrograph for observation well 123N52W6DDDA R (site number 62).

Section B - Hydrographs 229
Site number from location map: 63 

Local well number: 123N52W8BAAA R 

Station identification number: 452724097114701 

Other identifier: CO-93-26 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,895 feet 

Measuring point: 2.0 feet

Extremes: April 30,1997, to August 26,1999: Highest, 23.06 feet, April 30,1997; lowest, 25.62 feet, February 26, 

1998.

D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B63. Hydrograph for observation well 123N52W8BAAA R (site number 63).

1,869

Site number from location map: 64 

Local well number: 123N52W19BABA R 

Station identification number: 452540097130901 

Other identifier: RB-81C 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,918.0 feet 

Measuring point: 2.3 feet

Extremes: August 18, 1982, to October 6, 1999: Highest, 2.5 feet, July 22, 1997; lowest, 11.1 feet, September 8, 

1988.

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1996 1997 1998 1999

1,916

1,914

1,912

CALENDAR YEAR 

Figure B64. Hydrograph for observation well 123N52W19BABA R (site number 64).

230 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 67 

Local well number: 123N52W35CBBB2 R 

Station identification number: 452330097083802 

Other identifier: CO-93-34 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,910 feet 

Measuring point: 2.0 feet

Extremes: April 30,1997, to August 26, 1999: Highest, -0.95 foot, April 30, 1997; lowest, 5.83 feet, February 26, 

1998.

D J F M A M J J A S O N D J F M A M J J A S O N D JFMAMJJASOND 

1998 1999

CALENDAR YEAR 

Figure B67. Hydrograph for observation well 123N52W35CBBB2 R (site number 67).

Site number from location map: 68 

Local well number: 123N53W13CCCC2 R 

Station identification number: 452544097144802 

Other identifier: RO-7 

County: Day, South Dakota 

Aquifer: Prairie Coteau 

Altitude of land surface: 1,874 feet 

Measuring point: 1.6 feet

Extremes: April 30, 1997, to August 26, 1999: Highest, 17.72 feet, April 30, 1997; lowest, 18.8 feet, 

September 18, 1997, and October 27, 1997.

1,857

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B68. Hydrograph for observation well 123N53W13CCCC2 R (site number 68).

1,855

232 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 69 

Local well number: 124N50W27BBBB R 

Station identification number: 452959096545901 

Other identifier: R2-94-54 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,210.1 feet 

Measuring point: 2.17 feet

Extremes: December 12, 1996, to August 25, 1999: Highest, 25.75 feet, April 29, 1997; lowest, 33.88 feet, 

August 19, 1998.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B69. Hydrograph for observation well 124N50W27BBBB R (site number 69).

Site number from location map: 70 

Local well number: 124N51W25AAAB R 

Station identification number: 453001096584801 

Other identifier: R2-94-55 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,274 feet 

Measuring point: 1.6 feet

Extremes: December 11, 1996, to August 25, 1999: Highest, 12.52 feet, April 29, 1997; lowest, 14.32 feet, 

February 5, 1998.

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1997 1998

CALENDAR YEAR 

Figure B70. Hydrograph for observation well 124N51W25AAAB R (site number 70).

1999

Section B - Hydrographs 233
Site number from location map: 71

Local well number: 124N51W30BBBB2 R

Station identification number: 453002097060902

Other identifier: R2-99-13

County: Roberts, South Dakota

Aquifer: Marday

Altitude of land surface: 2,053.1 feet

Measuring point: 1.9 feet

Extremes: Single measurement of 323.44 feet on December 8, 1999.

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1996 1997 1998 1999

1,730.0

1,729.5

CALENDAR YEAR 

Figure B71. Hydrograph for observation well 124N51W30BBBB2 R (site number 71).

Site number from location map: 72 

Local well number: 124N51W4DDDDR 

Station identification number: 453240097022701 

Other identifier: R2-95-01 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,425 feet 

Measuring point: 2.5 feet

Extremes: December 11,1996, to August 26,1999: Highest, 156.6 feet, December 11, 1996; lowest, 161.63 feet, 

September 14, 1998.

LU

LU 

CD 162

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B72. Hydrograph for observation well 124N51W4DDDD R (site number 72).

234 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 73 

Local well number: 124N52W9AAAC2 R 

Station identification number: 453204097100202 

Other identifier: R2-99-10 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 2,003 feet 

Measuring point: 1.1 feet

Extremes: September 13, 1999, to December 8,1999: Highest, 49.48 feet, September 13,1999; lowest, 49.57 feet, 

December 13, 1999.

EH o 49"u 

ffiL?

55

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1,953.0 ^

CALENDAR YEAR 

Figure B73. Hydrograph for observation well 124N52W9AAAC2 R (site number 73).

Site number from location map: 74 

Local well number: 125N50W6CBBB R 

Station identification number: 453815096584001 

Other identifier: R2-93-53 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,225 feet 

Measuring point: 1.9 feet

Extremes: April 29, 1997, to August 25, 1999: Highest, 22.07 feet, April 29, 1997; lowest, 23.82 feet, August 25, 

1999.

|- LU 22 

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24

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1.203

1,202

1,201

CALENDAR YEAR 

Figure B74. Hydrograph for observation well 125N50W6CBBB R (site number 74).

Section B - Hydrographs 235
Site number from location map: 75 

Local well number: 125N50W6CCCC R 

Station identification number: 453752096584001 

Other identifier: RB-81-15 

County: Roberts, South Dakota

Aquifer: Undetermined I 

Altitude of land surface: 1,200 feet 

Measuring point: 2.5 feet

Extremes: April 29,1997, to August 25,1999: Highest, 4.22 feet, April 29,1997; lowest, 7.52 feet, September 14, 

1998.

LLJ

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B75. Hydrograph for observation well 125N50W6CCCC R (site number 75).

1,192

Site number from location map: 76 

Local well number: 125N50W6DCCC R 

Station identification number: 453752096580301 

Other identifier: RB-81-16 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,230 feet 

Measuring point: 1.6 feet

Extremes: April 29,1997, to August 25, 1999: Highest, 33.76 feet, April 29,1997; lowest, 35.44 feet, August 25, 

1999.

1,200

1,199

ul

1,198 - >

LLJ

m 36

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND ' 

1996 1997 1998 1999

1,197

CALENDAR YEAR 

Figure B76. Hydrograph for observation well 125N50W6DCCC R (site number 76).

236 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 77 

Local well number: 125N50W6DCCC2 R 

Station identification number: 453752096580302 

Other identifier: RB-81-17 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,231 feet 

Measuring point: 1.1 feet

Extremes: December 11, 1996, to October 5, 1999: Highest, 17.64 feet, May 27, 1998; lowest, 20.68 feet, 

March 11, 1997.

DJFMAMJ JASONDJFMAMJ JASONDJ FMAMJ JASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B77. Hydrograph for observation well 125N50W6DCCC2 R (site number 77).

Site number from location map: 78 

Local well number: 125N50W7ADDD R 

Station identification number: 453725096572801 

Other identifier: R2-93-54 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,205 feet 

Measuring point: 2.0 feet

Extremes: April 29,1997, to August 25,1999: Highest, 2.92 feet, April 29, 1997; lowest, 6.04 feet, September 14, 

1999.

cr >

1,198 H*

DJFMAMJ JASONDJFMAMJ JASONDJFMAMJ JASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B78. Hydrograph for observation well 125N50W7ADDD R (site number 78).

Section B - Hydrographs 237
Site number from location map: 79 

Local well number: 125N50W8BBBA R 

Station identification number: 453751096572401 

Other identifier: RB-11 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,216 feet 

Measuring point: 3.5 feet

Extremes: December 11, 1996, to October 5, 1999: Highest, 17.64 feet, May 27, 1998; lowest, 20.68 feet, 

March 11, 1997.

tig 16

18

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DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,198

1,197

1,196

1,195

LJJ

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Si

CALENDAR YEAR 

Figure B79. Hydrograph for observation well 125N50W8BBBA R (site number 79).

Site number from location map: 80 

Local well number: 125N50W8CCCC2 R 

Station identification number: 453700096572702 

Other identifier: RB-7W 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,207 feet 

Measuring point: 2.8 feet

Extremes: December 10, 1996, to August 25. 1999: Highest, 0.25 foot. April 29, 1997; lowest. 5.98 feet, 

August 25, 1999.

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1996 1997 1998 1999

1,206 UJ

1,204

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fij W 

1,202 -I UJ s°

1,200 < <

CALENDAR YEAR 

Figure B80. Hydrograph for observation well 125N50W8CCCC2 R (site number 80).

238 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 81 

Local well number: 125N50W8CCCC3 R 

Station identification number: 453700096572701 

Other identifier: RB-7E 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,207 feet 

Measuring point: 3.0 feet

Extremes: December 10, 1996, to October 5, 1999: Highest, 0.52 foot, April 29, 1997; lowest, 4.71 feet, 

September 29, 1997.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B81. Hydrograph for observation well 125N50W8CCCC3 R (site number 81).

Site number from location map: 82 

Local well number: 125N50W12ABCC2 R 

Station identification number: 453738096515402 

Other identifier: R2-97-43 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,120 feet 

Measuring point: 2.1 feet

Extremes: October 23, 1997, to August 25, 1999: Highest, 56.98 feet, October 23, 1997; lowest, 59.85 feet, 

August, 25, 1999.

1,064

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B82. Hydrograph for observation well 125N50W12ABCC2 R (site number 82).

1,060

Section B - Hydrographs 239
Site number from location map: 83 

Local well number: 125N50W20DDDD2 R 

Station identification number: 453514096561402 

Other identifier: RB-5 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,215 feet 

Measuring point: 3.3 feet

Extremes: December 11, 1996, to October 5, 1999: Highest, 4.96 feet, April 29, 1997; lowest, 11.94 feet, 

February 25, 1998.

1,215

LJJ

LLJ 

CO 15

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,200

CALENDAR YEAR 

Figure B83. Hydrograph for observation well 125N50W20DDDD2 R (site number 83).

Site number from location map: 84 

Local well number: 125N51W1DCCC R 

Station identification number: 453752096591801 

Other identifier: RB-12E 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,215 feet 

Measuring point: 2.3 feet

Extremes: April 29, 1997, to October 5, 1999: Highest, 19.02 feet, April 29, 1997; lowest, 20.86 feet, 

September 14, 1998.

I l I I l l l l I 1,197

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B84. Hydrograph for observation well 125N51W1DCCC R (site number 84).

240 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 85 

Local well number: 125N51W1DCCC2 R 

Station identification number: 453752096591802 

Other identifier: RB-12W 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,215 feet 

Measuring point: 2.3 feet

Extremes: April 29, 1997, to August 25, 1999: Highest, 18.91 feet, April 29, 1997; lowest, 21.05 feet, 

September 14, 1998.

1,193 

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND

1996 1997 1998 1999

CALENDAR YEAR 

Figure B85. Hydrograph for observation well 125N51W1DCCC2 R (site number 85)

Site number from location map: 86 

Local well number: 125N51W13ABBB2 R 

Station identification number: 453658096591702 

Other identifier: RB-10 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,222 feet 

Measuring point: 4.3 feet

Extremes: May 27, 1997, to October 5, 1999: Highest, 19.0 feet. May 20, 1997; lowest, 21.94 feet, February 25, 

1998.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B86. Hydrograph for observation well 125N51W13ABBB2 R (site number 86).

Section B - Hydrographs 241
Site number from location map: 87 

Local well number: 125N51W32CCCC R 

Station identification number: 453331097045301 

Other identifier: R2-96-01 

County: Roberts, South Dakota 

Aquifer: Revillo

Altitude of land surface: 1,660.1 feet 

Measuring point: 2.0 feet

Extremes: April 29,1997, to August 26,1999: Highest, 396.69, August 26,1999; lowest, 397.66 feet, October 23, 

1997.

HLU 396.0

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LLJ Q

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LU § 397.5

397.0

LU

m 398.0 I I I I I I I I I I I I I

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

I I I I I I I I I

1,264.1 fr]

1,263.5

1,263.0 LLJ w

_l LU

1,262.5 ^ CD

£ <

CALENDAR YEAR 

Figure B87. Hydrograph for observation well 125N51W32CCCC R (site number 87).

Site number from location map: 88 

Local well number: 125N51W7BBBB2 R 

Station identification number: 453751097060702 

Other identifier: R2-95-05 

County: Roberts, South Dakota 

Aquifer: Roslyn

Altitude of land surface: 1,525 feet 

Measuring point: 1.75 feet

Extremes: April 29, 1997, to August 26, 1999: Highest, 72.26 feet, August 26, 1999; lowest, 74.8 feet, April 16, 

1998.

I- L1J 72

LLJ O

LLJ <

LU

m 75

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,450

CALENDAR YEAR 

Figure B88. Hydrograph for observation well 125N51W7BBBB2 R (site number 88).

242 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 89 

Local well number: 125N52W16BABB2 R 

Station identification number: 453659097104502 

Other identifier: R2-99-12 

County: Roberts, South Dakota 

Aquifer: Eden

Altitude of land surface: 1,987.9 feet 

Measuring point: 2.2 feet

Extremes: September 13, 1999, to December 8, 1999: Highest, 296.57 feet, September 13, 1999; lowest, 

296.95 feet, December 8, 1999.

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297

298

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1,691

1,690 §

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B89. Hydrograph for observation well 125N52W16BABB2 R (site number 89).

Site number from location map: 90 

Local well number: 125N52W23CCCC R 

Station identification number: 453515097083801 

Other identifier: CO-93-19 

County: Roberts, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,972 feet 

Measuring point: 1.9 feet

Extremes: April 29, 1997, to August 26. 1999: Highest, 2.35 feet, April 7, 1999; lowest, 7.09 feet, February 25, 

1998.

CD

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,964

CALENDAR YEAR 

Figure B90. Hydrograph for observation well 125N52W23CCCC R (site number 90).

Section B - Hydrographs 243
Site number from location map: 91 

Local well number: 125N53W12CCCC R 

Station identification number: 453700097144901 

Other identifier: CO-93-42 

County: Marshall, South Dakota 

Aquifer: Coteau Lakes 

Altitude of land surface: 1,875 feet 

Measuring point: 2.7 feet

Extremes: March 11,1997, to August 26,1999: Highest, 9.43 feet, May 28,1998; lowest, 13.52 feet, February 25, 

1998.

LLJ 

CO 14

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B91. Hydrograph for observation well 125N53W12CCCC R (site number 91). [

Site number from location map: 92

Local well number: 126N49W7BBBB2 R

Station identification number: 454304096511302

Other identifier: R2-96-56

County: Roberts, South Dakota

Aquifer: Rosholt

Altitude of land surface: 1,098.5 feet

Measuring point: 1.9 feet

Extremes: April 29,1997, to August 25,1999: Highest, 47.7 feet, April 6,1999; lowest, 48.66 feet, May 20,1997.

8 47'5

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1996 1997 1998 1999

I I I I I I I I I I

1,051.0 H

1,050.5

1,050.0

1,049.5

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CALENDAR YEAR 

Figure B92. Hydrograph for observation well 126N49W7BBBB2 R (site number 92).

244 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 95 

Local well number: 126N50W32CCCB R 

Station identification number: 453819096572501 

Other identifier: RB-79D 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,164.4 feet 

Measuring point: 2.0 feet

Extremes: October 26, 1979, to October 5, 1999: Highest, 52.71 feet, April 29, 1997; lowest, 60.4 feet, 

September 1, 1982.

LU 

CD 58

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B95. Hydrograph for observation well 126N50W32CCCB R (site number 95).

Site number from location map: 96 

Local well number: 126N51W35AADAR 

Station identification number: 453928096595601 

Other identifier: RB-79C 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,160.6 feet 

Measuring point: 2.5 feet

Extremes: October 26,1979, to October 5, 1999: Highest, 2.46 feet, May 27,1998; lowest, 14.5 feet, October 21, 

1981.

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LU

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1996 1997 1998 1999

1,158

1,156

LU 

LU

1,152

CALENDAR YEAR 

Figure B96. Hydrograph for observation well 126N51W35AADA R (site number 96).

246 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 97 

Local well number: 126N51W36DCCC R 

Station identification number: 453844096591801 

Other identifier: RB-20 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,200 feet 

Measuring point: 3.1 feet

Extremes: December 11, 1996, to October 5, 1999: Highest, 5.97 feet, April 29, 1997; lowest, 7.79 feet, 

December 11, 1996.

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B97. Hydrograph for observation well 126N51W36DCCC R (site number 97).

1,192

Site number from location map: 98

Local well number: 127N48W2BBBB R

Station identification number: 4549110963 84601

Other identifier: RB-77F

County: Roberts, South Dakota

Aquifer: Rosholt

Altitude of land surface: 1,069 feet

Measuring point: 1.0 foot

Extremes: May 28, 1978, to October 5, 1999: Highest, 10.95 feet, April 28,1997; lowest, 28.2 feet, July 20, 1982.

tig 10

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1,059

LU

LU 

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B98. Hydrograph for observation well 127N48W2BBBB R (site number 98).

Section B - Hydrographs 247
Site number from location map: 99 

Local well number: 127N48W7BBBB R 

Station identification number: 454818096434501 

Other identifier: RB-77G 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,079.9 feet

Measuring point: 1.9 feet ' 

Extremes: November 30,1977, to October 5,1999: Highest, 0.63 feet, April 6,1999; lowest, 13.9 feet, October 4, 

1983, November 9, 1983.

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B99. Hydrograph for observation well 127N48W7BBBB R (site number 99).

Site number from location map: 100 

Local well number: 127N48W7BBBB2 R 

Station identification number: 454818096434502 

Other identifier: RB-77H 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,079.7 feet 

Measuring point: 3.6 feet

Extremes: November 30, 1977, to October 5, 1999: Highest, 8.2 feet, July 1,13, 1998; lowest, 20.6 feet. October 

4, 1983, November 9, 1983.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND

CD

CALENDAR YEAR 

Figure B100. Hydrograph for observation well 127N48W7BBBB2 R (site number 100).

248 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 103 

Local well number: 127N48W28AAAAR 

Station identification number: 454541096400502 

Other identifier: R2-97-45 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,090 feet 

Measuring point: 2.0 feet

Extremes: October 22, 1997, to August 25, 1999: Higher, 45.73 feet, April 6, 1999; lowest, 46.09 feet, 

September 14, 1998.

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1996 1997 1998 1999

1,044.5

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1,044.0 > $

1,043.5

CALENDAR YEAR 

Figure B103. Hydrograph for observation well 127N48W28AAAA R (site number 103).

Site number from location map: 104 

Local well number: 127N49W10BBBB2 R 

Station identification number: 454818096473002 

Other identifier: R2-96-53 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,089.2 feet 

Measuring point: 1.9 feet

Extremes: December 10, 1996, to August 25, 1999: Highest, 11.57 feet, May 27, 1998; lowest, 18.88 feet, 

August 25, 1999.

DJFMAMJJASOND JFMAMJJASOND

1997

JFMAMJJASOND 

1998 1999

CALENDAR YEAR 

Figure B104. Hydrograph for observation well 127N49W10BBBB2 R (site number 104).

250 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 105 

Local well number: 127N49W14DAAA R 

Station identification number: 454658096450301 

Other identifier: RB-77I 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,109.3 feet 

Measuring point: 2.2 feet

Extremes: November 30,1977, to October 5,1999: Highest, 36.9 feet, July 13,1998; lowest, 51.2 feet, October 4, 

1983.

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure BIOS. Hydrograph for observation well 127N49W14DAAA R (site number 105).

Site number from location map: 106 

Local well number: 127N49W14DAAA2 R 

Station identification number: 454658096450402 

Other identifier: RB-77J 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,109.9 feet 

Measuring point: 2.0 feet

Extremes: November 30,1977, to October 5, 1998: Highest, 19.8 feet, June 1,1998; lowest, 42.5 feet, October 4, 

1983.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B106. Hydrograph for observation well 127N49W14DAAA2 R (site number 106).

Section B - Hydrographs 251
Site number from location map: 107 

Local well number: 127N49W26DDDD R 

Station identification number: 454449096450201 

Other identifier: RB-77C 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,124.5 feet 

Measuring point: 1.6 feet

Extremes: June 6, 1977, to October 5, 1999: Highest, 54.0 feet, July 13, 1998; lowest, 70.0 feet, September 20, 

1977.

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CALENDAR YEAR 

Figure B107. Hydrograph for observation well 127N49W26DDDD R (site number 107).

Site number from location map: 108 

Local well number: 127N49W29DCDC2 R 

Station identification number: 454550096491302 

Other identifier: LTR-16 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,111.4 feet 

Measuring point: 4.0 feet

Extremes: December 10, 1996, to August 25, 1999: Highest, 54.68 feet, August 25, 1999; lowest, 58.78 feet, 

December 10, 1996.

DJ FMAMJ J ASONDJFMAMJ JASONDJ FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B108. Hydrograph for observation well 127N49W29DCDC2 R (site number 108).

252 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 111 

Local well number: 127N50W19CCCB R 

Station identification number: 454547096584301 

Other identifier: LTR-2 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,175.4 feet 

Measuring point: 2.0 feet

Extremes: February 24, 1998, to August 6, 1999: Highest, 40.09 feet, August 6, 1999; lowest, 42.45 feet, 

March 25, 1998.

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41

42

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1996 1997 1998 1999

1,135

1,134

1,133 j §

CALENDAR YEAR 

Figure B111. Hydrograph for observation well 127N50W19CCCB R (site number 111).

Site number from location map: 112 

Local well number: 127N50W21DDDDR 

Station identification number: 454541096550001 

Other identifier: R2-96-50 

County: Roberts, South Dakota 

Aquifer: Veblen 

Altitude of land surface: 1,139 feet 

Measuring point: 2.3 feet

Extremes: April 29, 1997, to August 25, 1999: Highest, 24.63 feet, April 6,1999; lowest, 26.69 feet, February 25, 

1998.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B112. Hydrograph for observation well 127N50W21DDDD R (site number 112).

254 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 113 

Local well number: 127N50W25ADAD2 R 

Station identification number: 454523096511602 

Other identifier: R2-96-58 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,099.5 feet 

Measuring point: 1.6 feet

Extremes: April 29,1997, to August 25,1999: Highest, 51.48 feet, August 18, 1998; lowest, 52.23 feet, April 16, 

1998.

to 51 '°

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B113. Hydrograph for observation well 127N50W25ADAD2 R (site number 113).

1,047.0

Site number from location map: L14 

Local well number: 127N51W3AAAAR 

Station identification number: 454910097011501 

Other identifier: RB-81A 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,226.3 feet 

Measuring point: 1.7 feet

Extremes: May 29, 1981, to September 1, 1999: Highest, 69.4 feet, September 1, 1999; lowest, 84.8 feet, 

October 4, 1983.

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1996 1997 1998 1999

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1 '156

1 '154

CALENDAR YEAR 

Figure B114. Hydrograph for observation well 127N51W3AAAA R (site number 114).

Section B - Hydrographs 255
Site number from location map: 115 

Local well number: 127N51W9AAAA2 R 

Station identification number: 454820097023602 

Other identifier: R2-97-07 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,192 feet 

Measuring point: 1.7 feet

Extremes: October 22, 1997, to August 6. 1999: Highest, 30.95 feet, August 6, 1999: lowest, 33.58 feet, 

February 24, 1998.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B115. Hydrograph for observation well 127N51W9AAAA2 R (site number 115).

1,162

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Site number from location map: 116 

Local well number: 127N52W25AAAA2 R 

Station identification number: 454838097061102 

Other identifier: R2-97-11 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,188 feet 

Measuring point: 1.9 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 0.14 foot, April 6, 1999; lowest, 5.72 feet, October 22, 

1997.

1,188

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1996 1997 1998 1999

1,182

CALENDAR YEAR 

Figure B116. Hydrograph for observation well 127N52W25AAAA2 R (site number 116).

256 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
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Site number from location map: 119 

Local well number: 128N48W4DDDD R 

Station identification number: 455336096400301 

Other identifier: R2-96-63 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,046.6 feet 

Measuring point: -0.2 foot

Extremes: December 10, 1996, to April 6, 1999: Highest, 20.58 feet, December 10, 1996; lowest, 33.96 feet, 

March 11, 1997.

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Figure B119. Hydrograph for observation well 128N48W4DDDD R (site number 119).

Site number from location map: 120 

Local well number: 128N48W6BBBB R 

Station identification number: 455423096434501 

Other identifier: LTR-10 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,098.2 feet 

Measuring point: 2.75 feet

Extremes: April 28. 1997, to August 6. 1999: Highest, 41.33 feet, August 6, 1999; lowest, 43.85 feet, April 28, 

1997.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B120. Hydrograph for observation well 128N48W6BBBB R (site number 120).

258 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 121 

Local well number: 128N48W19BCCC R 

Station identification number: 455123096434701 

Other identifier: R2-97-30 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,080 feet 

Measuring point: 1.7 feet

Extremes: October 22, 1997, to October 5, 1999: Highest, 8.88 feet, October 22, 1997; lowest, 23.7 feet, July 27, 

1999.

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1996 1997 1998 1999

1,080

1,070

1,060

1,050

CALENDAR YEAR 

Figure B121. Hydrograph for observation well 128N48W19BCCC R (site number 121).

Site number from location map: 122 

Local well number: 128N48W20BBBB R 

Station identification number: 455148096423101 

Other identifier: RB-77D 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,070.7 feet 

Measuring point: 2.1 feet

Extremes: November 30, 1977, to October 5, 1999: Highest, 1.14 feet, April 28, 1997; lowest, 18.6 feet, 

October 4, 1983.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B122. Hydrograph for observation well 128N48W20BBBB R (site number 122).

Section B - Hydrographs 259
Site number from location map: 123 

Local well number: 128N48W29DDDD R 

Station identification number: 455005096411801 

Other identifier: RB-77E 

County: Roberts, South Dakota

Aquifer: Rosholt ; 

Altitude of land surface: 1,081.5 feet 

Measuring point: 1.2 feet

Extremes: May 23, 1978, to October 5, 1999: Highest, 0.33 feet, April 28, 1997; lowest, 22.6 feet, October 4, 

1983.

1 0

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B123. Hydrograph for observation well 128N48W29DDDD R (site number 123).

Site number from location map: 124 

Local well number: 128N49W1DDAD2 R 

Station identification number: 455341096435001 

Other identifier: R2-97-32 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,074 feet 

Measuring point: 2.2 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 8.64 feet, August 6, 1999; lowest, 10.28 feet, 

February 24, 1998.

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LU

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1996 1997 1998 1999

1,066

1,065

1,064

1,063

CALENDAR YEAR 

Figure B124. Hydrograph for observation well 128N49W1DDAD2 R (site number 124).

260 Hydrologlc and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 125 

Local well number: 128N49W20BBBB R 

Station identification number: 455146096500001 

Other identifier: LTR-6 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,082.6 feet 

Measuring point: 4.0 feet

Extremes: December 10,1996, to August 6,1999: Highest, 8.9 feet, April 6,1999; lowest, 9.62 feet, December 10, 

1996.

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1996 1997 1998 1999

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CALENDAR YEAR 

Figure B125. Hydrograph for observation well 128N49W20BBBB R (site number 125).

Site number from location map: 126 

Local well number: 128N49W36AAAA R 

Station identification number: 455003096434701 

Other identifier: LTR-21 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,078.9 feet 

Measuring point: 3.9 feet

Extremes: December 10, 1996, to April 6, 1999: Highest, -1.48 feet, December 10, 1996; lowest, 1.36 feet, 

April 28, 1997.

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> 1996 1997 1998 1999

CALENDAR YEAR 

Figure B126. Hydrograph for observation well 128N49W36AAAA R (site number 126).

1,073

Section B - Hydrographs 261
Site number from location map: 127 

Local well number: 128N50W10BBBB2R 

Station identification number: 455333096550002 

Other identifier: R2-95-18 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,092.3 feet 

Measuring point: 3.7 feet

Extremes: December 10, 1996, to August 5, 1999: Highest, 13.96 feet, April 28, 1997; lowest, 16.53, 

September 15, 1998.

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1996 1997 1998 1999

1,087

1,085

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1,081

CALENDAR YEAR 

Figure B127. Hydrograph for observation well 128N50W10BBBB2 R (site number 127).

Site number from location map: 128 

Local well number: 128N50W21AAAAR 

Station identification number: 455148096550001 

Other identifier: LTR-5 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,093.7 feet 

Measuring point: 3.7 feet

Extremes: December 10, 1996, to August 5,1999: Highest, 3.02 feet, May 27, 1998; lowest, 3.79 feet, 

October 22, 1997.

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1996 1997 1998 1999

1,090.5 > 

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1,090.0 CC

CALENDAR YEAR 

Figure B128. Hydrograph for observation well 128N50W21AAAA R (site number 128).

262 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 129 

Local well number: 128N50W21 AABA R 

Station identification number: 455147096551301 

Other identifier: RB-79A 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,094.3 feet 

Measuring point: 2.5 feet

Extremes: October 26, 1979, to October 5, 1999: Highest, 0.3 feet, June 4, 1996; lowest, 6.8 feet, September 8, 

1981.

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B129. Hydrograph for observation well 128N50W21 AABA R (site number 129).

Site number from location map: 130 

Local well number: 128N50W21CCCC R 

Station identification number: 455057096561501 

Other identifier: RB-79B 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,112.8 feet 

Measuring point: 4.25 feet

Extremes: October 26, 1979, to December 1, 1999: Highest, -4.7 feet, June 30, 1999; lowest, 4.5 feet, August 14, 

1990.

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CALENDAR YEAR 

Figure B130. Hydrograph for observation well 128N50W21CCCC R (site number 130).

Section B - Hydrographs 263
Site number from location map: 131 

Local well number: 128N50W25AAAB2 R 

Station identification number: 455058096511802 

Other identifier: R2-97-26 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,095 feet 

Measuring point: 1.6 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 21.78 feet, May 27, 1988 and April 6, 1999; lowest, 

22.21 feet, October 22, 1997.

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1996 1997 1998 1999

1,074

1,073

1,072

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CALENDAR YEAR 

Figure B131. Hydrograph for observation well 128N50W25AAAB2 R (site number 131).

Site number from location map: 132 

Local well number: 128N50W25AAAB3 R 

Station identification number: 455058096511803 

Other identifier: R2-97-27 

County: Roberts, South Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,095 feet 

Measuring point: 2.1 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 9.69 feet, May 27, 1998; lowest, 12.08 feet, August 6, 

1999.

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1996 1997 1998 1999

1,087

1,085

1,083

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1,081

CALENDAR YEAR 

Figure B132. Hydrograph for observation well 128N50W25AAAB3 R (site number 132).

264 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 133 

Local well number: 128N51W23AABAR 

Station identification number: 455148097001401 

Other identifier: LTR-4 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,210.0 feet 

Measuring point: 2.25 feet

Extremes: December 12, 1996, to August 6, 1999: Highest, 50.23 feet, August 6, 1999; lowest, 53.64 feet, 

December 10, 1996.

tig 50

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B133. Hydrograph for observation well 128N51W23AABA R (site number 133).

Site number from location map: 134 

Local well number: 128N51W26BBB2 R 

Station identification number: 455608097010801 

Other identifier: 12276B 

County: Richland, North Dakota 

Aquifer: Veblen

Altitude of land surface: 1,198.7 feet 

Measuring point: 2.0 feet

Extremes: March 10, 1997, to August 5, 1998: Highest, 30.24 feet, August 5, 1999; lowest, 37.39 feet, March 10, 

1997.

tig 3°

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1996 1997 1998 1999

CALENDAR YEAR 

Figure B134. Hydrograph for observation well 128N51W26BBBB2 R (site number 134).

Section B - Hydrographs 265
Site number from location map: 135 

Local well number: 128N52W1DDDD2 R 

Station identification number: 455335097061501 

Other identifier: R2-97-18 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,205 feet 

Measuring point: 2.3 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 25.43 feet, August 6, 1999; lowest, 29.84 feet, 

February 25 and March 25, 1998.

D J FMAMJ J ASONDJ FMAMJ J ASOND J FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B135. Hydrograph for observation well 128N52W1DDDD2 R (site number 135).

1,175

Site number from location map: 136 

Local well number: 128N52W3CCCB2 R 

Station identification number: 455337097095502 

Other identifier: R2-97-17 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,201 feet 

Measuring point: 2.3 feet

Extremes: October 22, 1997, to August 6, 1999: Highest, 12.42 feet, August 6, 1999; lowest, 16.20 feet, 

August 18, 1998.

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1996 1997 1998 1999

1,189 H

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1,187 . -I

1,185

1,183

CALENDAR YEAR 

Figure B136. Hydrograph for observation well 128N52W3CCCB2 R (site number 136).

266 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 137 

Local well number: 128N52W25AAAB2 R 

Station identification number: 455053097061702 

Other identifier: R2-95-10 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,188 feet 

Measuring point: 2.0 feet

Extremes: April 28, 1997, to August 6, 1999: Highest, 13.62 feet, August 6, 1999; lowest, 17.9 feet, April 28, 

1997.

I- LU 19

UJ O

LU <

LU

m 18

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,170

CALENDAR YEAR 

Figure B137. Hydrograph for observation well 128N52W25AAAB2 R (site number 137).

Site number from location map: 138 

Local well number: 128N52W25AAAB R 

Station identification number: 455053097061701 

Other identifier: R2-95-09 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,188 feet 

Measuring point: 2.5 feet

Extremes: December 12, 1996, to August 6. 1999: Highest, 13.82 feet, August 6, 1999; lowest, 18.07 feet, 

December 12, 1996.

H LU 12

LU O

LU <

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1996 1997 1998 1999

1 ' 176 t

KG) 

1,174 Z LU

1,172 £§aS

1,170 £gl <

1,168 -*

CALENDAR YEAR 

Figure B138. Hydrograph for observation well 128N52W25AAAB R (site number 138).

Section B - Hydrographs 267
Site number from location map: 139 

Local well number: 128N52W27BBBC R

Station identification number: 455049097095501 I 

Other identifier: R2-97-20 i 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,212 feet 

Measuring point: 2.5 feet

Extremes: October 22,1997, to August 6,1999: Highest, 35.78 feet, August 6,1999; lowest, 38.85 feet, March 25, 

1998.

1,178

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1996 1997 1998 1999

1,172

CALENDAR YEAR 

Figure B139. Hydrograph for observation well 128N52W27BBBC R (site number 139).

Site number from location map: 140 

Local well number: 128N53W10BBBB R 

Station identification number: 455329097172501

Other identifier: ML-69A I 

County: Marshall, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,250 feet 

Measuring point: 2.3 feet

Extremes: December 4,1969, to October 6,1999: Highest, 59.2 feet, October 6,1999; lowest, 75.5 feet, August 2, 

1977, September 7, 1977.

tig 58

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1,192

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1996 1997 1998 1999

1,186

CALENDAR YEAR 

Figure B140. Hydrograph for observation well 128N53W10BBBB R (site number 140).

268 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 141

Local well number: 128N56W3BBBB

Station identification number: 455606097322901

Other identifier: ML-70C

County: Marshall, South Dakota

Aquifer: Undetermined

Altitude of land surface: 1,352 feet

Measuring point: 0.75 foot

Extremes: June 7,1977, to October 6,1999: Highest, 35.49 feet, March 25,1998; lowest, 42.9 feet, April 2, 1986.

1,317

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B141. Hydrograph for observation well 128N56W3BBBB (site number 141).

Site number from location map: 142 

Local well number: 129N48W33ADDAR 

Station identification number: 455457096395201 

Other identifier: LTR-9 

County: Roberts, South Dakota 

Aquifer: Fairmount 

Altitude of land surface: 1,051.7 feet 

Measuring point: 1.9 feet

Extremes: December 10,1996, to August 6,1999: Highest, 1.69 feet, April 6,1999; lowest, 1.03 feet, February 24, 

1998.

1,053.7

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B142. Hydrograph for observation well 129N48W33ADDA R (site number 142).

1 1,052.2

Section B - Hydrographs 269
Site number from location map: 143 

Local well number: 129N50W24CCD R 

Station identification number: 455611096520101 

Other identifier: 12186A 

County: Richland, North Dakota 

Aquifer: Rosholt

Altitude of land surface: 1,089.5 feet 

Measuring point: 1.1 feet

Extremes: May 7, 1992, to April 6. 1999: Highest, 17.04 feet, June 6, 1996; lowest, 20.11 feet, November 10, 

1992.

il o 17'°

LJJ <

LL LL

17.5 -

LJJ D 

LJJ <

CC

LJJ

<^ 

5 LJJ

> m

18.0 -

18.5

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B143. Hydrograph for observation well 129N50W24CCD1 R (site number 143).

Site number from location map: 144

Local well number: 129N50W24CCD2 R

Station identification number: 455611096520102

Other identifier: 12186B

County: Richland, North Dakota

Aquifer: Rosholt I

Altitude of land surface: 1,089.5 feet !

Measuring point: 2.3 feet

Extremes: May 7, 1992, to April 6, 1999: Highest, 16.91 feet. May 16, 1995, lowest; 21.66 feet. October 13.1992.

h- LJJ 

LJJ O

_JCO 18 

LJJ Q

LJJ 

CQ 22

| I I I I

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,072 Z LU

1,070

- 1,068

!?. CO

CALENDAR YEAR 

Figure B144. Hydrograph for observation well 129N50W24CCD2 R (site number 144).

270 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 145

Local well number: 129N50W24CCD3 R

Station identification number: 455611096520103

Other identifier: 12186C

County: Richland, North Dakota

Aquifer: Rosholt

Altitude of land surface: 1,089.5 feet

Measuring point: 0.9 foot

Extremes: May 7, 1992, to April 6,1999: Highest, 15.39 feet, May 16, 1995; lowest, 20.42 feet, October 13, 1992.

WO 

LJJ <

LL LL

LJJ Q

§5

CC > 

LJJ ^

|3> CO

14

16

18

20

D J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND 

1996 1997 1998 1999

1,074

1,072

1,070

CALENDAR YEAR 

Figure B145. Hydrograph for observation well 129N50W24CCD3 R (site number 145).

Site number from location map: 146 

Local well number: 129N50W27BBBB2R 

Station identification number: 455607096545002 

Other identifier: R2-95-21 

County: Roberts, South Dakota 

Aquifer: Undetermined 

Altitude of land surface: 1,106 feet 

Measuring point: 2.19 feet

Extremes: December 10,1996, to April 6,1999: Highest, 1.05 feet, April 6,1999; lowest, 2.14 feet, December 10, 

1996.

tig 1 '° 

LJJ <

LL LL

-r CC

LJJ Q 

LJJ <

tr

LJJ

2.0

S UJ 

5 CQ

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,104.5

1,104.0

1,103.5

LJJ

CALENDAR YEAR 

Figure B146. Hydrograph for observation well 129N50W27BBBB2 R (site number 146).

Section B - Hydrographs 271
Site number from location map: 147 

Local well number: 129N51W8CCC R 

Station identification number: 455755097045501 

Other identifier: 13037 

County: Richland, North Dakota 

Aquifer: Veblen

Altitude of land surface: 1,196.2 feet 

Measuring point: 1.5 feet

Extremes: September 2, 1992, to August 5, 1999: Highest, 31.06 feet, August 5, 1999; lowest, 43.85 feet, 

November 10, 1992.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B147. Hydrograph for observation well 129N51W8CCC R (site number 147).

Site number from location map: 148 

Local well number: 129N51W19ABA R 

Station identification number: 455701097051501 

Other identifier: 13422 

County: Richland, North Dakota 

Aquifer: Veblen

Altitude of land surface: 1,191.2 feet 

Measuring point: 1.7 feet

Extremes: October 25, 1994, to August 5, 1999: Highest, 17.65 feet, August 5, 1999; lowest, 27.36 feet. 

December 14, 1994.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B148. Hydrograph for observation well 129N51W19ABA R (site number 148).

272 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 149 

Local well number: 129N52W14AAA 

Station identification number: 455932097092401 

Other identifier: 13494 

County: Richland, North Dakota 

Aquifer: Veblen

Altitude of land surface: 1,220 feet 

Measuring point: 1.6 feet

Extremes: November 21, 1995, to August 5, 1999: Highest, August 5, 1999; lowest 38.70 feet, November 21, 

1995.

LU <

LL LL

_JC7> 

LU Q

LJJ <

25

30

35

LJJ

LJJ 

CQ 40 I I I I I

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,195 H

LJJ

1,190

' "B 11

1,180

CALENDAR YEAR 

Figure B149. Hydrograph for observation well 129N52W14AAA (site number 149).

Site number from location map: 150 

Local well number: 129N52W21CCC R 

Station identification number: 455610097110901 

Other identifier: 12277 

County: Richland, North Dakota 

Aquifer: Veblen

Altitude of land surface: 1,221.2 feet 

Measuring point: 2.5 feet

Extremes: July 17, 1991, to August 5, 1999: Highest, 35.86 feet. August 5, 1999; lowest. 42.97 feet, April 13, 

1993.

I- LJJ 34 LJJ 34

O 

LJJ <

LL LL

** 

_,-W 

LJJ D

LJJ <

LJJ 

CO

36

38

40 I I I I I I I I I I I I I I I I I I I I I I I

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

«.

LJJ

yj LJJ

1,184 > CO

UJ

1,182 < <

CALENDAR YEAR 

Figure B150. Hydrograph for observation well 129N52W21CCC R (site number 150).

Section B - Hydrographs 273
Site number from location map: 151 

Local well number: 129N52W25AAAB2 R 

Station identification number: 455608097061702 

Other identifier: R2-95-13 

County: Roberts, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,196 feet 

Measuring point: 2.4 feet

Extremes: December 10, 1996, to August 5, 1999: Highest, 17.54 feet, August 5, 1999: lowest, 24.24 feet, 

March 10, 1997.

Co 

LU < 

Li- LJ.

Z ^ 

± 13 or.

_j CO 20 

LU Q

111 <

-1 3 25

Eg 

|3

> DO ^noU

| 1 1 1 1 1 1 1 1 I 1 1

 __-^^

1 i i i i i i i i i i i

D|J FMAMJ J ASOND

i i i i i i i i i i i

^^

I I I I I I I I I I I

JFMAMJJASOND

i i i i i i i i I i I

-

-

1 1 1 1 1 1 1 1 1 1 1

JFMAMJJASOND

1,180 Uj_, 

IL "-J

z LJJ

1,175 J < 1JJ LiJ

$Z

1,170 £ 0 

^^

CALENDAR YEAR 

Figure B151. Hydrograph for observation well 129N52W25AAAB2 R (site number 151).

Site number from location map: 152 

Local well number: 129N53W7BBAR 

Station identification number: 455842097210301 

Other identifier: 9248 

County: Sargent, North Dakota 

Aquifer: Spiritwood 

Altitude of land surface: 1,171 feet 

Measuring point: 1.8 feet

Extremes: March 10, 1997, to August 5, 1999: Highest, 32.54 feet, April 6, 1999; lowest, 34.46 feet, August 17, 

1998.

LiJ

m 35

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,136

CALENDAR YEAR 

Figure B152. Hydrograph for observation well 129N53W7BBA R (site number 152).

274 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Site number from location map: 153 

Local well number: 129N53W9AAA R 

Station identification number: 455842097173701 

Other identifier: 9249 

County: Sargent, North Dakota 

Aquifer: Spiritwood 

Altitude of land surface: 1,170 feet 

Measuring point: 1.2 feet

Extremes: March 10, 1997, to August 5, 1999: Highest, 29.76 feet, August 5, 1999; lowest, 3U 

1997.

; feet, June 19,

LU

m 32

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B153. Hydrograph for observation well 129N53W9AAA R (site number 153).

Site number from location map: 154 

Local well number: 129N53W27BBBB R 

Station identification number: 455606097172501 

Other identifier: ML-70A 

County: Marshall, South Dakota 

Aquifer: Veblen

Altitude of land surface: 1,255 feet 

Measuring point: 2.6 feet

Extremes: June 7, 1977, to October 6, 1999: Highest, 63.2 feet, October 6, 1999; lowest. 79.6 feet, August 19, 

1983.

68

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND ' 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B154. Hydrograph for observation well 129N53W27BBBB R (site number 154).

1,187

Section B - Hydrographs 275
Site number from location map: 155

Local well number: 129N54W1AAA

Station identification number: 460118097230501

Other identifier: 13452

County: Sargent, North Dakota

Aquifer: Spiritwood

Altitude of land surface: 1,162 feet

Measuring point: 2.1 feet

Extremes: April 28, 1997, to April 6, 1999: Highest, 13.78 feet, April 6, 1999; lowest, 15.62 feet, July 23, 1997.

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998

CALENDAR YEAR 

Figure B155. Hydrograph for observation well 129N54W1 AAA (site number 155).

Site number from location map: 156 

Local well number: 129N54W1AAA2 

Station identification number: 460118097230502 

Other identifier: 13453 

County: Sargent, North Dakota 

Aquifer: Spiritwood 

Altitude of land surface: 1,162 feet 

Measuring point: 1.8 feet

Extremes: April 28,1997, to April 6, 1999: Highest, 13.58 feet, April 6, 1999; lowest, 15.34 feet, October 22, 

1997.

z ^

LU Q

§1 

gj|

5 m

13

14

15

16

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,149

1,148

1,147

1,146

Lu

-I 

LU

CALENDAR YEAR 

Figure B156. Hydrograph for observation well 129N54W1AAA2 (site number 156).

276 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
31 in

I 

CD 

Ol

oo

><

D.3-o

I

o

ro 

>

1 

m

2 

1

i§ 33

WATER LEVEL, IN FEET 

BELOW LAND SURFACE

IOl 

00

§m

&

3 o

1/3

WATER LEVEL, IN FEET 

ABOVE SEA LEVEL

-JO

oI

VOo"O)oo 

o

 S

Isr

WATER LEVEL, IN FEET 

BELOW LAND SURFACE

= 

O

m

<

o m o 

>

O)

WATER LEVEL, IN FEET 

ABOVE SEA LEVEL

I

N3

oo
Site number from location map: 159 

Local well number: 130N53W4BAA 

Station identification number: 460117097195801 

Other identifier: 13447 

Countj': Sargent, North Dakota 

Aquifer: Spiritwood 

Altitude of land surface: 1,163 feet

Measuring point: 1.5 feet ' 

Extremes: April 28, 1997, to April 6. 1999: Highest. 25.47 feet, April 6, 1999; lowest, 27.18 feet, September 18, 

1997.

tig 25

_

U Q 

§1

26

27

LU o

LU 

CO 28

| I I I I I I I I I I I | I I I I I I I I I I I

\

I I I I I I I I I I

D J FMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

1,138

1,137

1,136 Q. >

^ | 

1,135 ^

CALENDAR YEAR 

Figure B159. Hydrograph for observation well 130N53W4BAA (site number 159).

Site number from location map: 160

Local well number: 130N53W4BAA2

Station identification number: 460117097195802

Other identifier: 13448

County: Sargent, North Dakota

Aquifer: Spiritwood

Altitude of land surface: 1,163 feet

Measuring point: 1.6 feel

Extremes: April 28,1997, to April 6,1999: Highest, 25.06 feet, April 6, 1999; lowest, 26.78 feet, August 21, 1997.

1,138

111

EC >

'"§

UJ

CO 27

D J FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B160. Hydrograph for observation well 130N53W4BAA2 (site number 160).

278 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
WATER LEVEL, IN FEET 

BELOW LAND SURFACE

(D 

CDPI

I" "O

o"Io'§COO O O 

3D

c8

§00

|l |jli||I

o>

WATER LEVEL, IN FEET 

ABOVE SEA LEVEL

CTQfT

oo

r- 

>

S

O3

oaf? J*

t i

I

WATER LEVEL, IN FEET 

BELOW LAND SURFACE

= 

O

w 

^

9 

m

8 

2

s. SO. "

a

5

^B 

§

CTQi"

O\&' 

O\

WATER LEVEL, IN FEET 

ABOVE SEA LEVEL

o\

w 

S

?ifs ^l

4^. to 

"

OV -J 

_

n

to

oo
Site number from location map: 163 

Local well number: 130N54W35CCCR 

Station identification number: 455941097234001 

Other identifier: 9247 

County: Sargent, North Dakota 

Aquifer: Spiritwood 

Altitude of land surface: 1,170 feet 

Measuring point: 2.4 feet

Extremes: March 10,1997, to August 5,1999: Highest, 43.17 feet, August 5,1999; lowest, 50.76 feet, March 10, 

1997.

tig 40

LJJ <

DJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND 

1996 1997 1998 1999

CALENDAR YEAR 

Figure B163. Hydrograph for observation well 130N54W35CCC R (site number 163).

1-115

280 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Section C - Annual peak-flow information
Table C1 . Annual peak-flow measurements for station 05050000, Bois de Sioux River near White Rock, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year; 1, gage height affected by backwater; 2, gage height not the maximum for the year. ft3/s, cubic feet per 

second]

Water 

year

1997

1998

1999

Date

04-20-97

03-08-98

06 11 99

Peak 

.. . Discharge oischarge .

(ft'/s) codes

8,750

1,070

737

(feet)

16.90

10.32

8.83

Gage-height Highest 

codes since

2

Maximum 

gage height 

(feet)

11.81

Date Ga9e-height 

codes

03-10-98 1

Table C2. Annual peak-flow measurements for station 05051650, La Belle Creek near Veblen, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year; 1, gage height affected by backwater; 2, gage height not the maximum for the year. ft3/s, cubic feet per 

second]

Water 

year

1997

1998

1999

Date

04-04-97

05-12-98

07-08-99

Peak _. . discharge Dis^arge

(ft'/s) C°deS

100

133

97

Gage 

height 

(feet)

10.60

5.41

5.15

Gage-height Higl 

codes sir

L,2

2

Maximum 

"f gage height 

(feet)

12.57

5.30

Date G

04-01-97

02-26-99

.ge-h.ght

1

1

Table C3. Annual peak-flow measurements for station 05289985, Big Coulee Creek near Peever, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year; 1. gage height affected by backwater; 2, gage height not the maximum for the year. fAs, cubic feet per 

second]

Water 

year

Peak _. .

 » j. ._ Discharge 3

Date discharge . 3 

(ft3/s) codes

Gage _ ..... ..... Maximum ' Gage-height Highest height 

(feet)

_. codes . since gage height Date 

(feet)

Gage-height 

codes

1997 04-05-97 358

1998 05-12-98 614

1999 10-17-98 136

7.73

7.42

5.18

9.43

5.59

03-27-97

06-06-99

Section C - Annual Peak-Flow Informetion 283
Table C4. Annual peak-flow measurements for station 05290000, Little Minnesota River near Peever, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year; 1, gage height affected by backwater; 2, gage height not the maximum for the year. ftVs, cubic feet per 

second]

Water 

year

Date

(feet)

1997

1998

1999

03-28-97

05-17-98

06-07-99

3,590

1,340

306

14.40

6.31 2

4.20

6.58 02-29-98 1

Table C5. Annual peak-flow measurements for station 05291000, Whetstone River near Big Stone City, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year. ft3/s, cubic feet per second]

Water 

year

Date discharge Dischar9e height 

(ft3/s) codes (feet)

Gage-height Highest 

codes since

Maximum

gage height

(feet)

Dete Gage-height 

codes

1997 04-06-97 7,930

1998 03-27-98 1,230

1999 03-17-99 325

14.21

7.09

3.62

Table C6. Annual peak-flow measurements for station 05292000, Minnesota River at Ortonville, Minn.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value; 7. discharge is a historic peak. Gage height codes: no code, stage or 

gage height is the maximum, unaffected value for the station during the year, ft /s, cubic feet per second]

Water 

year

1997

1998

1999

Date

04-10-97

04-08-98

05-17-99

Peak 

discharge 

(fl3/s)

5,070

1,980

671

Discharge 

codes

7

Gage 

height 

(feet)

12.85

8.03

4.59

Gage-height Highest 

codes since

04-13-52

Maximum 

gage height 

(feet)

Date Gage-heig 

codes

284 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table C7. Annual peak-flow measurements for station 06479215, Big Sioux River near Florence, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value. Gage height codes: no code, stage or gage height is the maximum, 

unaffected value for the station during the year; 1, gage height affected by backwater; 2, gage height is not the maximum for the year. ft3/s, cubic feet per 

second]

Water 

year

1997

1998

1999

Date

04-04-97

05-16-98

10-17-98

Peak _. . Gage ..... ... ._ Maximum _ ... discharge Dls<*ar9e height Ga9e-he'9ht H '?hest gage height Date Ga9e-he'9ht 

(ft'/s) C0des (feet) codes Slnce (feet) COdes

2,000

528

134

9.32 2

8.12 2

6.55

9.52 04-02-97 1

8.23 02-26-98 1

Table C8. Annual peak-flow measurements for station 06479438, Big Sioux River near Watertown, S. Dak.

[Discharge codes: no code, peak flow or discharge is a maximum instantaneous value; 7, discharge is a historic peak. Gage height codes: no code, stage or 

gage height is the maximum, unaffected value for the station during the year; 1, gage height affected by backwater; 2, gage height is not the maximum for 

the year, fr/s, cubic feet per second]

Water 

year

Peak 

Date discharge 

(ft3/s)

Discharge 

codes

Gage 

height 

(feet)

Gage-height 

codes

Highest 

since

Maximum 

gage height 

(feet)

Date Gage-height 

codes

1997

1998

1999

04-05-97

05-17-98 

10-17-98

7,820

1,140

946

12.09

8.87

8.60

1881

9.91 02-26-98

Section C - Annual Peak-Flow Information 285
Section D - Mean flow and summary statistics
Table D1.1. Mean flow, in cubic feet per second, for station 05051650, LaBelle Creek near Veblen, S. Dak.

Water

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Month

Oct Nov

0 0

0 0

0 0

0 0

0 0

.002 .137

.176 .269

.486 .373

2.27 1.16

.146 .084

.095 .171

.842 2.84

Dec

0

0

0

0

0

.036

.701

.140

.154

.240

.110

1.81

Jan

0

0

0

0

.005

.009

.548

.023

.105

.326

.048

.303

Feb Mar

0.293 0.932

0 3.13

0 .217

.078 .361

.503 1.79

.006 7.03

.372 14.3

.761 22.4

3.26 9.86

.258 1.96

2.41 7.75

1.36 6.59

Table D1 .2. Statistics on mean flow, in cubic feet per second, 

(October 1988 through September 1999)

Statistic -

Number

Maximum

Percentile

75th

50th

25th

Minimum

Mean

Standard 

deviation

Skewness

Coefficient 

of variation

Percent of

annual 

flow

Apr

0.281

5.49

.264

.669

.858

12.7

L3.9

114

1.53

20.9

13.6

5.99

for station

May

0.091

1.18

.151

.495

.132

2.50

5.84

8.67

15.1

3.37

L1.9

5.53

Jun

0.001

.115

.041

3.43

3.12

6.46

.206

2.41

2.29

.409

6.25

1.51

Jul

0

.020

0

3.07

1.83

14.1

1.93

2.78

.111

.295

3.14

2.74

05051650, LaBelle Creek

Aug

0

.281

0

.389

.072

7.42

.038

.455

.003

.117

.127

.417

 i

Sep

0

.028

0

.105

.241

.771

.086

.235

0

.016

0

7.09

Eknnual

0.133

.854

.056

.718

.710

4.29

3.21

4.21

3.00

2.33

3.80

3.08

near Veblen, S. Dak.

Month

Oct. Nov.

12 12

2.27 2.84

.409 .347

.049 .110

0 0

0 0

.33 .42

.66 .83

2.69 2.70

1.98 1.98

1.27 1.59

Dec.

12

1.81

.218

.073

0

0

.27

.53

2.75

1.97

1.01

Jan.

12

.548

.254

.016

0

0

.11

.18

1.66

1.58

0.43

Feb. Mar.

12 12

3.26 22.4

1.21 9.33

.333 4.86

.024 1.15

Apr.

12

20.9

134

5.74

.716

0 .217 .264

.78 6.36

1.05 6.67

1.67 1.42

1.36 1.05

2.94 24.16

7.30

6.99

0.59

.96

27.72

May.

12

15.1

7.96

2.93

.237

.091

4.58

5.02

1.07

1.10

17.40

Jun.

12

6.46

3.35

1.90

.138

.001

2.19

2.31

0.93

1.05

8.31

Jul.

12

14.1

3.00

1.88

.043

0

2.50

3.88

2.79

1.55

9.50

Aug.

12

7.42

.410

.122

.012

0

0.78

2.10

3.42

2.70

2.95

Sep.

12

7.09

.240

.057

0

0

0.71

2.02

3.39

2.83

2.71

- Annual

12

4.29

3.65

2.66

.712

.056

2.20

1.61

-0.11

0.73

*99.99

'Less than 100 percent due to rounding.

Mean Flow and Summary Statistics 289
Table D1.3. Serial correlation for 1-year lag for monthly and annual mean flows for station 05051650, LaBelle Creek near 

Veblen, S. Dak. (October 1988 through September 1999

Month

Oct. Nov. Dec. Jan. Feb. Mar. Apr. May.

0.099 0.055 0.006 -0.145 0.088 0.564 0.231 0.404

Table D1 .4. Correlation matrix for monthly mean flow for station 05051 650, 

1988 through September 1999)

[ , not computed]

Month Month 

Oct. Nov. Dec. Jan. Feb. Mar. Apr.

Oct 1 0.596 0.273 0.149 0.800 0.347 -0.166

Nov - 1 .890 .366 .475 .210 -.065

Dec - - 1 .646 .195 .205 .151

Jan - - - 1 .057 .286 .539

Feb - - - - 1 .320 -.026

Mar - - - - - 1 .403

Apr - - - - - - 1

May

Jun

Jul

Aug

C^r,

OCJJ 

Jun. Jul.

-0.139 -0.003

Aug.

-0.138

LaBelle Creek near Veblen, S.

May. Jun.

0.750 -0.026

.385 -.053

.181 -.180

.211 -.354

.905 .304

.636 .144

.275 .184

1 .306

1

-

-

-

Jul.

-0.192

-.018

-.015

-.140

-.166

.164

.294

-.046

.742

1

-

-

Sep.

-0.711

Annual

0.606

Dak. (October

Aug.

-0.163

-.078

-.109

-.109

-.240

.057

.251

-.131

.596

.956

1

-

Sep.

0.220

.909

.915

.915

.143

.032

-.036

.041

-.026

.121

.047

1

290 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table D1.5. Lowest mean flow, in cubic feet per second, and ranking for the following number of consecutive days, for 

station 05051650, LaBelle Creek near Veblen, S. Dak.

Water 

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Flow, in cubic feet per second, and ranking for number of consecutive days

1

0 1

0 2

0 3

0 4

0 5

0 6

0 7

0 8

0 9

0 10

0 11

0 12

3

0 1

0 2

0 3

0 4

0 5

0 6

0 7

.007 12

0 8

0 9

0 10

0 11

7

0 1

0 2

0 3

0 4

0 5

0 6

0 7

.010 12

0 8

0 9

0 10

.009 11

14

0 1

0 2

0 3

0 4

0 5

0 6

.001 10

.016 11

0 7

0 8

1 9

.036 12

30

0 1

0 2

0 3

0 4

0 5

0 6

.024 11

.018 10

0 7

.016 9

0 8

.28 12

60

0 1

0 2

0 3

0 4

0 5

.008 7

.061 9

.049 8

.001 6

.068 11

.062 10

.28 12

90

0 1

0 2

0 3

0 4

0 5

.013 6

.38 11

.090 8

.029 7

.13 10

.10 9

.82 12

120

0 1

0 2

0 3

0 4

0 5

.028 6

.43 10

.16 8

.47 11

.20 9

.10 7

1.43 12

183

0.062 2

.58 8

.010 1

.076 3

.38 4

1.36 7

2.86 11

4.14 12

2.68 10

.67 6

1.85 8

2.36 9

Table D1.6. Highest mean flow, in cubic feet per second, and ranking for the following number of consecutive days, for 

station 05051650, LaBelle Creek near Veblen, S. Dak.

Water 

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Flow, In cubic feet per second, and ranking for number of consecutive days

1

3.50 11

20.0 9

.77 12

29.0 8

13.0 10

81.0 3

75.0 4

200 1

150 2

75.0 5

60.0 6

49.0 7

3

2.83 11

18.3 8

.50 12

15.1 9

11.6 10

51.0 4

53.3 3

130 1

80.3 2

48.3 5

45.3 6

28.7 7

7

1.96 11

13.7 8

.47 12

9.59 9

9.40 10

35.9 4

37.6 3

72.9 1

46.9 2

32.1 6

34.0 5

18.5 7

15

1.58 11

11.9 8

.40 12

8.43 9

6.75 10

27.0 5

28.3 3

41.7 1

27.2 4

25.4 6

31.1 2

30

1.17 11

7.79 8

.33 12

5.45 9

4.71 10

18.9 5

21.0 3

26.5 1

16.0 6

21.5 2

19.5 4

21.1 7 1 10.2 7

60

0.76 11

4.69 8

.27 12

3.37 9

2.53 10

12.3 5

16.3 2

18.5 1

8.92 6

12.9 4

15.9 3

7.74 7

90

0.53 11

3.34 8

.22 12

2.35 9

1.83 10

9.54 4

11.5 3

14.8 1

9.53 5

8.84 6

12.5 2

6.30 7

120

0.41 11

2.51 8

.17 12

1.96 9

1.56 10

9.99 3

8.78 4

11.9 1

7.94 5

6.74 6

10.7 2

5.29 7

183

0.27 11

1.70 8

.11 12

1.41 9

1.37 10

8.51 1

6.10 4

8.16 2

5.39 5

4.51 7

7.49 3

4.60 6

Mean Flow and Summary Statistics 291
Table D2.1 . Mean flow, in cubic feet per second, for station 05289985, Big Coulee Creek near Peever, S. Dak.

Water

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Month

Oct Nov Dec

000

000

.193 .223 0

.002 .018 .023

1.64 .547 .488

.340 1.61 .530

2.70 3.69 1.29

3.76 1.18 .679

4.48 2.24 1.24

2.13 .906 .778

.996 1.25 1.24

3.08 3.26 1.66

Jan

0

0

0

0

.666

.059

.026

.750

.819

.957

.486

.166

Feb

0.847

0

0

0

2.90

.738

1.36

1.53

5.60

1.39

7.15

4.00

Mar

5.28

11.8

3.48

1.42

6.59

10.2

20.1

23.4

21.3

10.6

9.92

6.64

Apr

1.71

12.0

1.52

3.61

2.41

12.6

10.4

16.2

21.0

34.0

18.5

6.00

May

1.09

2.76

1.30

3.99

1.25

6.37

6.55

19.0

8.53

6.85

22.5

6.05

Jun

0.013

.059

.789

11.1

4.09

7.38

6.84

8.78

3.62

2.21

4.17

5.00

Jul

0

0

.008

7.85

2.31

16.6

2.84

2.85

4.63

1.34

2.51

5.55

Aug

0

.003

.002

3.58

.370

3.69

.573

3.24

2.85

.704

.523

.617

t

Sep

0

1.19

0

2.52

2.91

.825

2.10

.374

.593

.013

.014

1. 47

Table D2.2. Statistics on mean flow, in cubic feet per second for station 05289985, Big Coulee Creek near Peever, S 

(October 1988 through September 1999)

Statistic

Number

Maximum

Percentile

75th

50th

25th

Minimum

Mean

Standard

deviation

Skewness

Coefficient

of variation

Percent of

annual

flow

Month

Oct. Nov. Dec.

12 12 12

4.48 3.69 1.66

2.98 2.08 1.24

1.32 1.04 .604

.050 .069 .006

000

1.61 1.24 0.66

1.60 1.26 0.59

.54 .92 .27

1.00 1.01 .89

3.47 2.68 1.42

Jan.

12

.957

.729

.112

0

0

0.33

0.38

.60

1.16

0.71

Feb.

12

7.15

3.72

1.38

.184

0

2.13

2.34

1.21

1.10

4.58

Mar.

12

23.4

18.0

10.1

5.61

1.42

10.89

7.16

.67

.66

23.46

Apr.

12

34.0

17.9

11.2

2.71

1.52

11.66

9.73

1.05

.83

25.11

May.

12

22.5

8.11

6.21

1.66

1.09

7.19

6.84

1.52

.95

15.48

Jun.

12

11.1

7.24

4.13

1.14

.013

4.50

3.51

.40

.78

9.70

Jul.

12

16.6

5.32

2.67

.341

0

3.87

4.66

2.08

1.20

8.34

Aug.

12

3.69

3.14

.595

.095

0

1.35

1.51

.78

1.12

2.90

Sep.

12

2.91

1.94

.709

.013

0

1.00

1.04

.74

1.04

2.16

knnual

0.748

2.32

.630

2.85

2.17

5.11

4.90

6.86

6.41

5.14

5.76

3.62

.Dak.

- Annual

12

6.86

5.61

4.26

2.21

.630

3.88

2.13

-.23

.55

hoo.oi

Greater than 100 percent due to rounding.

292 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table D2.3. Serial correlation for 1 -year lag for monthly and annual mean flows for station 05289985, Big Coulee Creek near 

Peever, S. Dak. (October 1988 through September 1999)

Oct. Nov. Dec. Jan. Feb.

0.572 0.367 0.703 0.440 0.207

Month

Mar. Apr. May.

0.633 0.510 0.164

Table D2.4. Correlation matrix for monthly mean flow for station 05289985, 

1988 through September 1999)

[--, not computed]

Month 

Oct. Nov. Dec. Jan.

Oct. 1 0.681 0.750 0.657

Nov. - 1 .888 .077

Dec. - - 1 .383

Jan. - - - 1

Feb.

Mar.

Apr.

May.

Jun.

Jul.

Aug.

Sep.

Month

Feb. Mar. Apr.

0.506 0.753 0.441

.422 .518 .193

.742 .474 .400

.500 .462 .708

1 .260 .321

1 .522

1

--

-

--

--

Jun.

0.192

Jul.

-0.107

Aug.

-0.178

Big Coulee Creek near Peever,

May.

0.403

.251

.501

.452

.604

.512

.504

1

-

--

-

-

Jun.

0.231

.298

.215

.011

-.019

.183

-.037

.344

1

-

-

--

Jul.

-0.047

.263

.135

-.169

-.031

-.034

-.002

.049

.622

1

-

-

Sep.

0.088

S.Dak.

Aug.

0.237

.084

.025

.157

-.043

.287

.171

.284

.777

.743

1

-

Annual

0.675

(October

Sep.

0.001

.164

.022

-.198

-.140

-.146

-.443

-.368

.476

.218

.116

1

Mean Flow and Summary Statistics 293
Table D2.5. Lowest mean flow, in cubic feet per second, and ranking for the following number of consecutive days, for 

station 05289985, Big Coulee Creek near Peever, S. Dak.

Water 

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Flow, in cubic feet per second, and ranking for number of consecutive days

1

0 1

0 2

0 3

0 4

0 5

.020 12

0 6

0 7

0 8

.010 11

0 9

0 10

3

0 1

0 2

0 3

0 4

0 5

.027 12

0 6

0 7

0 8

.010 11

0 9

0 10

7

0 1

0 2

0 3

0 4

.001 9

.030 11

0 5

0 6

0 7

.010 10

0 8

.10 12

14

0 1

0 2

0 3

0 4

.014 10

.032 11

0 5

0 6

0 7

.011 9

0 8

.12 12

30

0 1

0 2

0 3

0 4

.11 10

.044 8

0 5

.25 12

.091 9

.013 6

.014 7

.16 11

60

0 1

0 2

0 3

0 4

.49 10

.26 6

.096 5

.66 11

.85 12

.36 8

.27 7

.48 9

90

0 1

0 2

0 3

.007 4

.54 6

.43 5

.69 9

.62 7

1.03 11

.67 8

.92 10

1.58 12

120

0 1

0 2

.014 4

.010 3

.67 6

.64 5

1.54 10

.83 7

1.79 11

.97 8

1.00 9

1.97 12

183

0.47 2

2.10 4

.60 3

.26 1

2.14 5

2.38 6

4.86 10

5.33 11

5.96 12

3.25 8

3.48 9

3.15 7

Table D2.6. Highest mean flow, in cubic feet per second, and ranking for the following number of consecutive days, for 

station 05289985, Big Coulee Creek near Peever, S. Dak.

Water 

year

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Flow, in cubic feet per second, and ranking for number of consecutive days

1

10.0 12

75.0 7

20.0 11

118 5

30.0 10

170 3

65.0 8

250 2

110 6

163 4

305 1

59.0 9

3

8.67 12

58.3 6

15.0 11

53.3 7

20.7 10

69.7 5

46.7 8

140 1

83.3 4

113 3

124 2

43.0 9

7

7.71 12

43.6 5

9.29 11

25.9 8

14.0 10

33.7 6

30.7 7

70.9 3

51.4 4

86.7 1

77.1 2

19.8 9

15

7.33 11

31.1 5

6.13 12

18.2 8

11.1 10

25.3 6

22.2 7

38.3 4

39.0 3

62.1 1

41.2 2

11.5 9

30

5.88 11

19.4 6

4.05 12

11.5 8

8.41 10

17.8 7

21.0 5

27.4 4

32.4 2

40.9 1

29.7 3

9.19 9

60

3.92 11

12.9 6

2.75 12

10.2 8

5.45 10

12.7 7

15.6 5

23.7 3

22.6 4

24.8 1

24.0 2

7.77 9

90

2.99 11

9.01 7

2.24 12

8.05 8

4.21 10

10.5 6

12.5 5

20.5 1

17.8 3

17.7 4

18.6 2

6.88 9

120

2.28 11

6.76 9

1.81 12

7.14 7

4.11 10

12.0 5

11.3 6

17.5 1

14.7 3

13.6 4

15.2 2

7.02 8

183

1.50 11

4.55 9

1.19 12

5.56 7

3.27 10

9.55 4

8.11 6

12.3 1

11.1 2

9.36 5

10.8 3

5.52 8

294 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Section E - Water-level measurements

Table E1 . Water-level measurements for Bitter Lake in Day County

Date

04-10-97

04-11-97

04-12-97

04-13-97

04-14-97

04-15-97

04-16-97

04-17-97

04-18-97

04-19-97

04-20-97

04-21-97

04-22-97

04-25-97

04-28-97

05-01-97

05-05-97

05-09-97

05-13-97

05-14-97

05-20-97

Water-level 

elevation 

(feet)

1,786.7

1,786.7

1.786.7

1,787.0

1,787.1

1,787.2

1,787.4

1,787.5

1,787.6

1,787.7

1,787.8

1,787.9

1,788.0

1,788.2

1,788.2

1,788.5

1,788.6

1,788.8

1,788.9

1,788.5

1,789.0

Date

10-07-97

05-04-98

05-20-98

05-25-98

05-26-98

06-02-98

06-08-98

06-12-98

06-16-98

06-22-98

07-06-98

07-20-98

07-20-98

07-27-98

08-05-98

08-10-98

08-21-98

11-13-98

03-23-99

04-07-99

04-12-99

Water-level 

elevation 

(feet)

1,788.4

1,790.1

1,791.1

1,791.3

1,791.26

1,791.3

1,791.2

1,791.3

1,791.5

1,791.5

1,791.58

1,791.5

1,791.3

1,791.3

1,791.3

1.791.3

1,791.1

1,791.0

1,791.3

1,791.47

1,791.53

Date

04-19-99

04-26-99

05-05-99

05-13-99

06-01-99

06-10-99

06-14-99

06-21-99

07-01-99

07-07-99

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-23-99

09-03-99

09-13-99

09-20-99

09-27-99

Water-level 

elevation 

(feet)

1,791.51

1,791.53

1,791.67

1,791.71

1,791.63

1,791.91

1,791.87

1,791.99

1,791.97

1,791.91

1.792.01

1,791.93

1,791.68

1,791.89

1,792.09

1,791.95

1.791.81

1,792.11

1,792.05

1,792.05

1,792.11

Section E - Water-Level Measurements 297
Table E2. Water-level measurements for Blue Dog Lake in Day County

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

04-07-97

04-10-97

04-11-97

04-12-97

04-13-97

04-14-97

04-15-97

04-16-97

04-17-97

04-18-97

04-19-97

04-20-97

04-21-97

04-22-97

04-25-97

04-28-97

05-01-97

05-09-97

05-13-97

05-16-97

05-20-97

10-01-97

10-07-97

03-01-98

04-01-98

1,802.3

1,801.9

1,802.2

1,802.1

1,801.8

1,801.7

1,801.5

1,801.5

1,801.7

1,801.8

1,802.0

1,802.1

1,802.1

1,802.2

1,802.0

1,801.8

1,801.6

1,801.4

1,801.2

1,800.58

1,801.0

1,800.5

1,800.0

1,800.9

1,802.0

05-04-98

05-01-98

05-20-98

05-25-98

05-26-98

05-29-98

06-02-98

06-08-98

06-15-98

06-16-98

06-22-98

06-29-98

07-06-98

07-20-98

07-27-98

08-05-98

08-10-98

08-21-98

08-25-98

08-28-98

09-04-98

11-13-98

04-07-99

04-12-99

04-19-99

1,802.1

1,802.9

1,802.87

1,802.9

1,802.88

1,802.9

1,802.9

1,802.8

1,803.0

1,803.0

1,803.0

1,803.1

1,803.04

1,803.0

1,802.8

1,802.3

1,802.7

1,802.5

1,802.6

1,802.6

1.802.5

1,802.8

1,803.55

1,803.59

1,803.63

04-26-99

05-05-99

05-13-99

06-01-99

06-10-99

06-14-99

06-21-99

07-01-99

07-07-99

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-23-99

09-03-99

09-13-99

09-20-99

09-27-99

10-04-99

10-12-99

10-18-99

10-25-99

11-02-99

1,803.61

1,803.73

1,803.89

1,803.83

1,804.29

1,804.23

1,804.21

1,804.21

1,804.19

1,804.19

1,804.09

1,804.06

1,803.98

1,803.92

1,803.76

1,803.66

1,803.62

1,803.68

1,803.56

1,803.54

1,803,42

1,803.36

1,803.32

1,803.3

1,803.24

298 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table E3. Water-level measurements for Buffalo Lake North in Marshall County

Water-level 

Date elevation Date 

(feet)

05-19-97 1,837.7 05-05-98 

10-07-97 1,836.5 09-28-98

Table E4. Water-level measurements for Buffalo Lake South

Water-level 

Date elevation Date 

(feet)

05-19-97 1,838.6 05-05-98 

10-07-97 1,835.3 09-28-98

Water-level 

elevation 

(feet)

1,836.6 

1,834.7

in Marshall County

Water-level 

elevation 

(feet)

1,838.1 

1,835.4

Date

05-03-99 

09-28-99

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

1,836.4 

1,836.0

Water-level 

elevation 

(feet)

1,837.6 

1,837.0

Table E5. Water-level measurements for Clear Lake in Marshall County

Water-level 

Date elevation Date 

(feet)

05-19-97 1,822.9 05-05-98 

10-07-97 1,821.5 09-28-98

Table E6. Water-level measurements for Clubhouse Lake in

Water-level 

Date elevation Date 

(feet)

Water-level 

elevation 

(feet)

1,822.5 

1.821.9

Roberts County

Water-level 

elevation 

(feet)

Date

05-03-99 

09-28-99

Date

Water-level 

elevation 

(feet)

1,822.3 

1,822.0

Water-level 

elevation 

(feet)

05-13-971 972.7

'Water-level measurements discontinued after this date.

Table E7. Water-level measurements for Cottonwood Lake (North) in Roberts County

Weter-level 

Date elevation Date 

(feet)

05-13-97 1,030.6 05-05-98 

10-07-97 1,029.6 09-28-98

Water-level 

elevation 

(feet)

1,030.0 

1,029.3

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

1,030.0 

1,029.7

Section E - Water-Level Measurements 299
Table E8. Water-level measurements for Cottonwood Lake in Marshall County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

1,827.7 

1,826.3

Date

05-05-98 

09-28-98

Water-level 

elevation 

(feet)

1,827.3 

1,826.5

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

1.827.3 

1,827.3

Table E9. Water-level measurements for Drywood Lakes in Roberts County

[Note: North and South Drywood Lakes have coalesced into one lake]

Date

05-13-97 

10-07-97

Water-level 

elevation 

(feet)

1,948.8 

1,947.8

Date

05-05-98 

09-29-98

Water-level 

elevation 

(feet)

1,949.1 

1,948.7

Date

05-04-99 

09-28-99

Water-level 

elevation 

(feet)

1,950.0 

1,949.6

300 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table E10. Water-level measurements for Enemy Swim Lake in Day County

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

04-10-97

04-11-97

04-12-97

04-13-97

04-14-97

04-15-97

04-16-97

04-17-97

04-18-97

04-21-97

04-22-97

04-25-97

04-28-97

05-05-97

05-08-97

05-12-97

05-20-97

05-26-97

10-08-97

10-29-97

05-04-98

05-18-98

05-26-98

1,856.0

1,856.0

1,856.1

1,856.2

1,856.2

1,856.3

1,856.27

1,856.2

1,856.2

1,856.1

1,856.1

1,856.0

1,855.8

1,855.5

1,855.4

1,855.2

1,854.9

1,854.85

1,853.3

1,853.32

1,854.6

1,854.85

1,854.85

06-02-98

06-08-98

06-12-98

06-15-98

06-16-98

06-22-98

06-29-98

07-06-98

07-20-98

07-27-98

08-05-98

08-10-98

08-21-98

08-28-98

09-04-98

11-13-98

03-23-99

04-07-99

04-12-99

04-19-99

04-26-99

05-05-99

05-13-99

1,854.6

1,854.4

1,854.4

1,854.4

1,854.4

1,854.3

1,854.2

1,854.2

1,854.0

1,853.9

1,853.7

1.853.6

1,853.5

1,853.6

1,853.4

1,853.9

1,854.0

1,854.14

1,854.12

1,854.08

1,854.02

1,854.14

1,854.14

06-01-99

06-10-99

06-14-99

07-01-99

07-07-99

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-24-99

09-03-99

09-13-99

09-20-99

09-27-99

10-04-99

10-12-99

10-18-99

10-25-99

11-02-99

1,853.92

1,854.16

1,854.06

1,853.9

1,853.59

1,853.82

1,853.7

1,854.03

1,853.56

1,853.48

1,853.42

1,853.36

1,853.48

1,853.58

1,853.50

1,853.52

1,853.44

1,853.40

1,853.38

1,853.6

1,853.32

Section E - Water-Level Meaaurements 301
Table E11 . Water-level measurements for Hillebrands Lake in Day County

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

04-01-97

04-10-97

05-20-97

10-01-97

10-08-97

11-14-97

04-14-98

04-20-98

04-27-98

04-28-98

05-04-98

05-04-98

05-05-98

05-07-98

05-11-98

05-11-98

05-12-98

05-15-98

1,798.3

1,797.5

1,799.2

1,800.08

1,799.4

1,799.98

1,801.34

1,801.43

1,801.9

1,801.9

1,801.6

1,801.95

1,801.95

1,801.94

1,801.98

1,802.02

1,802.4

1,802.48

05-18-98

05-20-98

05-26-98

07-06-98

11-13-98

03-23-99

04-07-99

04-12-99

04-19-99

04-26-99

05-05-99

05-13-99

06-01-99

06-10-99

06-14-99

06-21-99

07-01-99

07-07-99

1,802.59

1,802.6

1,802.68

1,802.57

1,802.1

1,802.7

1,802.91

1,802.93

1,802.93

1,802.93

1,803.07

1,803.21

1,803.21

1,803.55

1,803.51

1,803.53

1,803.61

1,803.59

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-24-99

09-03-99

09-13-99

09-20-99

09-27-99

10-04-99

10-12-99

10-18-99

10-25-99

11-02-99

1,803.61

1,803.55

1,804.03

1,803.97

1,803.83

1,803.83

1,803.67

1,803.75

1,803.75

1,803.65

1,803.65

1,803.47

1,803.92

1.803.37

1,803.33

1,803.23

Table E12. Water-level measurements for Hurricane Lake in Roberts County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

1,751.1 

1,750.7

Date

05-05-98 

09-29-98

Water-level 

elevation 

(feet)

1,751.3 

1,750.4

Date

05-04-99 

09-28-99

Water-level 

elevation 

(feet)

1,751.0 

1,750.6

302 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation
Table E13. Water-level measurements for Pickerel Lake in Day County

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

Date

Water-level

elevation

(feet)

04-11-97

04-12-97

04-13-97

04-14-97

04-15-97

04-16-97

04-17-97

04-18-97

04-21-97

04-22-97

04-25-97

04-28-97

05-01-97

05-05-97

05-08-97

05-12-97

05-20-97

10-08-97

05-04-98

05-20-98

05-25-98

1,846.6

1,846.5

1,846.4

1,846.4

1,846.4

1,846.5

1,846.5

1,846.5

1,846.5

1,846.5

1,846.3

1,846.2

1,846.0

1,845.9

1,845.9

1,845.8

1,846.6

1,846.7

1,846.6

1,846.00

1,845.9

05-26-98

06-02-98

06-12-98

06-16-98

06-22-98

06-29-98

07-06-98

07-20-98

07-27-98

08-05-98

08-10-98

08-21-98

08-28-98

09-04-98

04-07-99

04-12-99

04-19-99

04-26-99

05-05-99

05-13-99

06-01-99

1,845.89

1,845.7

1,845.7

1,845.7

1,845.5

1,845.5

1.845.6

1,845.3

1,845.2

1,845.0

1,845.1

1,845.1

1.845.2

1,845.0

1,845.73

1,845.68

1,845.62

1,845.52

1.845.62

1,845.76

1,845.46

06-10-99

06-21-99

07-01-99

07-07-99

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-24-99

09-03-99

09-13-99

09-20-99

09-27-99

10-04-99

10-12-99

10-18-99

10-25-99

11-02-99

1,846.08

1,845.72

1,845.66

1,845.56

1,845.64

1,845.46

1,845.38

1,845.34

1,845.28

1,845.32

1,845.26

1,845.42

1,845.54

1.845.46

1,845.44

1,845.36

1,845.36

1,845.36

1,845.36

1,845.38

Table E14. Water-level measurements for Piyas Lake in Marshall County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

1,831.5 

1,830.9

Date

05-05-98 

09-28-98

Water-level 

elevation 

(feet)

1,831.3 

1,831.0

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

1,832.4 

1,832.6

Table E15. Water-level measurements for Red Iron Lake North in Marshall County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

1,830.6 

1,829.3

Date

05-05-98 

09-28-98

Water-level 

elevation 

(feet)

1,829.3 

1,828.5

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

1,829.2 

1,828.7

Section E - Water-Level Measurements 303
Table E16. Water-level measurements for Spring Lake in Day County

Date

Water-level

elevation

(feet)

Date

Weter-level

elevation

(feet)

Date

Water-level

elevation

(feet)

04-01-97

04-10-97

05-29-97

06-09-97

10-01-97

10-08-97

11-14-97

04-14-98

04-20-98

04-27-98

04-28-98

05-04-98

05-04-98

05-05-98

05-07-98

05-11-98

05-11-98

05-12-98

1,798.22

1,796.4

1,799.2

1,799.6

1,800.08

1,799.4

1,799.98

1,801.34

1,801.43

1,801.9

1,801.9

1,801.6

1,801.95

1,801.95

1,801.94

1,801.98

1,802.02

1,802.4

05-15-98

05-18-98

05-20-98

05-26-98

07-06-98

11-13-98

03-23-99

04-07-99

04-12-99

04-19-99

04-26-99

05-05-99

05-13-99

06-01-99

06-10-99

06-14-99

06-21-99

07-01-99

1,802.48

1,802.59

1,802.60

1,802.68

1,802.57

1,802.1

1.802.7

1,802.91

1,802.93

1,802.93

1,802.93

1,803.07

1,803.21

1,803.21

1,803.55

1,803.51

1,803.53

1,803.61

07-07-99

07-12-99

07-19-99

07-26-99

08-02-99

08-09-99

08-16-99

08-24-99

09-03-99

09-13-99

09-20-99

09-27-99

10-04-99

10-12-99

10-18-99

10-25-99

11-02-99

1,803.59

1,803.61

1,803.55

1,804.03

1,803.97

L803.83

1,803.83

1,803.67

1,803.75

1,803.75

1,803.65

1.803.65

1,803.47

1,803.92

1,803.37

1,803.33

1,803.23

Table E17. Water-level measurements for Whitestone Lake North in Roberts County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

2,015.0 

2,013.9

Date

05-05-98 

09-29-98

Water-level 

elevation 

(feet)

2,015.3 

2,013.9

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

2,015.0 

2,014.9

Table E18. Water-level measurements for Whitestone Lake South in Roberts County

Date

05-19-97 

10-07-97

Water-level 

elevation 

(feet)

2,015.0 

2,014.0

Date

05-05-98 

09-29-98

Water-level 

elevation 

(feet)

2,015.3 

2,013.9

Date

05-03-99 

09-28-99

Water-level 

elevation 

(feet)

2,015.0 

2,014.9

304 Hydrologic and Water-Quality Data, 1997 through 1999, Lake Traverse Reservation/Roberts County Investigation

* U.S. GOVERNMENT PRINTING OFFICE: 2000 673-482 / 60002 Region No. 8