Mississippi Valley Division Engineer Research and Development Center

Particle Size Distributions of 

Bed Sediments along the 

Mississippi River, Grafton, 

Illinois, to Head of Passes, 

Louisiana, November 2013

MRG&P Report No. 7 • April 2016
Mississippi River Geomorphology 

And Potamology Program 

MRG&P Report No. 7 

April 2016 

Particle Size Distribution of Bed Sediments 

along the Mississippi River, Grafton, Illinois, to 

Head of Passes, Louisiana, November 2013

Roger A. Gaines

U.S. Army Corps of Engineers, Memphis District

167 North Main Street

Memphis, TN 38103-1894

Anthony M. Priestas

Coastal and Hydraulics Laboratory

U.S. Army Engineer Research and Development Center

3909 Halls Ferry Road

Vicksburg, MS 39180-6199

Final report 

Approved for public release; distribution is unlimited. 
MRG&P Report No. 7 ii

Abstract

Changes in Mississippi River bed material gradations between Cairo, IL, 

and Head of Passes, LA, have been previously determined in 1932 and 

1989. In November 2013, bed material samples were collected from the 

thalweg and across the channel width along a reach extending from 

Grafton, IL, to Head of Passes, LA. In all, 754 samples were collected at 

496 locations, and results were compared to the earlier sampling 

programs. Results show that since 1932 the Lower Mississippi River bed 

sediments have become more uniform, the reach-averaged D50 grain 

diameter has reduced by approximately 50%, and the river has relatively 

fined upstream and coarsened downstream with little change since 1989.

DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. 

Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. 

All product names and trademarks cited are the property of their respective owners. The findings of this report are not to 

be construed as an official Department of the Army position unless so designated by other authorized documents.

DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR.
MRG&P Report No. 7 iii

Contents

Abstract .......................................................................................................................................................... ii

Figures and Tables.........................................................................................................................................v

Preface........................................................................................................................................................... ix

Unit Conversion Factors ........................................................................................................................... xiii

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

Previous efforts ........................................................................................................................ 1

Current investigation................................................................................................................ 1

2 Sampling and Analysis Program........................................................................................................3

Field sampling .......................................................................................................................... 3

Sampling vessels...................................................................................................................... 3

The samplers ............................................................................................................................ 4

Sampling procedure................................................................................................................. 6

Sample locations...................................................................................................................... 8

Initial laboratory analysis.......................................................................................................11

Quality control (QC) ................................................................................................................ 17

Revised CHL procedure..........................................................................................................21

Merging sieve and LD results ................................................................................................22

Analysis of samples containing significant mud content.........................................................24

Variability in processed data..................................................................................................26

3 Results ..................................................................................................................................................32

2013 Thalweg data ................................................................................................................32

Comparison of 2013 thalweg data with 1989 and 1932 datasets ....................................36

Matching 2013 locations with 1932 and 1989 locations.......................................................36

Comparing grain size distributions............................................................................................37

General trends............................................................................................................................ 37

Comparison of mean, D16, D50, and D84 diameters..................................................................50

2013 Cross-channel data ......................................................................................................61

Discussion of results..............................................................................................................63

4 Summary and Conclusions ...............................................................................................................66

References ...................................................................................................................................................68

Appendix A: Data Tables............................................................................................................................71

Appendix B: Plates...................................................................................................................................152

Appendix C: Daily Progress Reports, Field Sampling.......................................................................160
MRG&P Report No. 7 iv

Appendix D: Data Listing for Standard Sieve and Laser Diffraction Method............................... 170

Report Documentation Page
MRG&P Report No. 7 v

Figures and Tables

Figures

Figure 1. U.S. Coast Guard Defender Class vessel used in field sampling. ...........................................4

Figure 2. WES drag samplers: (A) Original 4 ft long sampler (top); sampler shortened by 

11 in. (bottom). (B) Photo of crab pot puller mounted to boom arm on side of boat in 

transport position. (C) With sampler deployed at bottom of river to collect sample.............................5

Figure 3. Crab pot puller and boom after retrieving sampler...................................................................6

Figure 4. Depositing sample from sampler.................................................................................................7

Figure 5. Mixing ejected sample using scoop. ...........................................................................................8

Figure 6. Placing sample material into bags to be sent back to lab for gradation analysis.................8

Figure 7. Location map of thalweg samples taken November 2013. The UMR samples are 

denoted by red markers. ...............................................................................................................................9

Figure 8. Multiple sample locations at a transect. ..................................................................................10

Figure 9. Measured water depth at thalweg sample locations, November 2013...............................11

Figure 10. Example samples for determining Dmax..................................................................................13

Figure 11. Comparison of size fraction results for QC samples (particle sizes less than 

2.00 mm to less than 0.063 mm). QC results show good agreement for sieve-only 

samples (dashed oval). Inset shown in Figure 12. ..................................................................................20

Figure 12. Comparison of size fraction results for QC samples 0% to 10% composition 

(particle sizes less than 2.00 mm to less than 0.063 mm)...................................................................20

Figure 13. Comparison of size fraction results for QC samples 50% to 100% composition 

(particle sizes less than 31.50 mm to less than 4.00 mm)...................................................................21

Figure 14. Spreadsheet example used to combine LD and sieve results in a Matlab script. 

LD volume percent results are normalized by the sieve fraction < 63 μm (0.063 mm) 

given by flaser at the truncation diameter. The sieve weight percent is then normalized by 

(1-flaser). .......................................................................................................................................................23

Figure 15. Example merged grain size distribution of sample (RM 11.9) with large mud 

percentage (flaser = 58%) by combining sieve and LD distributions.......................................................23

Figure 16. Example merged grain size distribution of sample (U196CT) with 0% mud. Note 

that the combined distribution is therefore the same as that obtained by sieving. ...........................24

Figure 17. CHL results of variability runs for cumulative percent finer for particle sizes 

using LD method with Malvern Mastersizer 2000. Each run represents a subsample of 

material from GRA3-C and is the average of three instrument measurements..................................27

Figure 18. USGS results of variability runs for cumulative percent finer for particle sizes 

using the SP method. ..................................................................................................................................28

Figure 19. Comparison of particle size analysis in terms of a cumulative distribution (A) 

and volume percent distribution using SP (USGS) and LD (CHL) methods. ........................................29

Figure 20. Examples of instrument variation between subsamples of material from 

sample GRA3C using the LD method. Variations between subsamples (Run 1 vs. Run 2) 

are due to changes in sample representativeness; however, the Malvern shows excellent 

repeatability for each subsample...............................................................................................................30
MRG&P Report No. 7 vi

Figure 21. LD results from successive draws from a single sample slurry. Percent finer 

values increase with each draw from the sample slurry.........................................................................31

Figure 22. Definition sketch for grain size distribution plotted on a linear scale................................32

Figure 23. Variability for D50 sizes, UMR, Grafton, IL, to Cairo, IL. .........................................................34

Figure 24. Variability and trend for D50 sizes, LMR, Cairo, IL, to Head of Passes, LA. ........................35

Figure 25. Composition of 2013 thalweg bed material averaged by 25-mile reaches, UMR: 

Grafton to Cairo, IL. ......................................................................................................................................38

Figure 26. Composition of the 2013 thalweg bed material averaged by 25-mile reaches, 

LMR: Cairo, IL, to Head of Passes, LA........................................................................................................39

Figure 27. Composition of the 1989 bed materials averaged by 25-mile reaches, LMR, 

Cairo, IL, to Head of Passes, LA (data from Nordin and Queen 1994).................................................40

Figure 28. Composition of 1932 bed materials averaged by 25-mile reaches, LMR, Cairo, 

IL, to Head of Passes, LA (data from Nordin and Queen 1994). ...........................................................41

Figure 29. Actual percentage change in Mississippi River bed compositions from 1932 to 

2013. .............................................................................................................................................................42

Figure 30. Difference in percentage of Gravel (>2 mm) between 2013, 1989, and 1932 

samples averaged by 25-mile reaches. ....................................................................................................44

Figure 31. Difference in percentage of very coarse sand (1 mm) between 2013, 1989, 

and 1932 samples averaged by 25-mile reaches...................................................................................45

Figure 32. Difference in percentage of coarse sand (0.5 mm) between 2013, 1989, and 

1932 samples averaged by 25-mile reaches. .........................................................................................46

Figure 33. Difference in percentage of medium sand (0.25 mm) between 2013, 1989, 

and 1932 samples averaged by 25-mile reaches...................................................................................47

Figure 34. Difference in percentage of fine sand (0.125 mm) between 2013, 1989, and 

1932 samples averaged by 25-mile reaches. .........................................................................................48

Figure 35. Difference in percentage of very fine sand (0.0625 mm) between 2013, 1989, 

and 1932 samples averaged by 25-mile reaches...................................................................................49

Figure 36. Mississippi River bed material gradations, 2013.................................................................51

Figure 37. Mississippi River bed material gradations, 1989 (data from Nordin and Queen 

[1994])...........................................................................................................................................................52

Figure 38. Mississippi River bed material gradations, 1932 (data from Nordin and Queen 

[1994])...........................................................................................................................................................53

Figure 39. Variation in D16 grain size averaged by 25-mile reaches. “Expon.” indicates a 

logarithmic fit................................................................................................................................................55

Figure 40. Variation in D50 grain size averaged by 25-mile reaches. “Expon.” indicates a 

logarithmic fit................................................................................................................................................56

Figure 41. Variation in D84 grain size averaged by 25-mile reaches. “Expon.” indicates a 

logarithmic fit................................................................................................................................................57

Figure 42. Comparison of mean grain diameters for the 2013, 1989, and 1932 samples 

averaged by 25-mile reaches. ....................................................................................................................58

Figure 43. Comparison of sorting coefficients for the 2013, 1989, and 1932 samples 

averaged by 25-mile reaches. Smaller values indicate well-sorted sediment.....................................59

Figure 44. Maximum grain size of Mississippi River thalweg samples (1989 and 2013). ...............60

Figure 45. Comparison of maximum particle size frequency distributions for 2013 and 

1989 study periods. Maximum grain sizes measured along major axis..............................................61
MRG&P Report No. 7 vii

Figure 46. Cross-channel sample median grain sizes, Cairo, IL, to Head of Passes, LA, 

averaged along 25-mile reaches. Samples labeled “A” indicate right descending bank and 

“E” left descending bank. “T” indicates thalweg samples. ....................................................................62

Figure 47. Large lignite material deposited on gravel bar at RM 778 by 2011 flood. Lignite 

conglomerates range in size up to 1 m or more......................................................................................65

Figure B1. Location Map: Grafton, IL, to Cairo, IL.................................................................................153

Figure B2. Location Map: Cairo, IL, to Memphis, TN............................................................................154

Figure B3. Location Map: Below Memphis, TN, to Vicksburg, MS......................................................155

Figure B4. Location Map: Vicksburg, MS, to above New Orleans, LA................................................156

Figure B5. Location Map: New Orleans, LA, to Gulf of Mexico............................................................ 157

Figure B6. Hydrographs at Hickman, KY, for 1931–1933, 1987–1989. and 2011–2013. .........158

Figure B7. Sampler details.......................................................................................................................159

Tables

Table 1. Samples of bed material of Mississippi River and tributaries...................................................3

Table 2. ASTM standard for sieve sample sizes (modified from ASTM D6913-04, 2009). ...............14

Table 3. Overloading limits for standard sieve set (from ASTM D6913-04, 2009).............................14

Table 4. Sieve stacks used for grain size distribution measurements. ................................................15

Sieve openings..............................................................................................................................................15

Table 5. QC samples sent to USGS sediment laboratory for processing..............................................17

Table 6. Percent composition of Mississippi River bed materials averaged across reach 

indicated, Cairo, IL, to Head of Passes, LA. ..............................................................................................42

Table 7. Calculated statistics averaged from RM 950 to RM 0 for time period indicated. ................61

Table 8. Cross-channel (A–E) and thalweg (T) median grain sizes and compositions 

averaged between RM 950 and Head of Passes, LA. Refer to Figure 8 for cross-channel 

sampling scheme. Variability reported as 1 standard deviation. ..........................................................63

Table A1. Thalweg grain size distributions of material coarser than 0.063 mm for samples 

collected in the UMR (Grafton, IL, to Ohio River). ....................................................................................71

Table A2. Thalweg grain size distributions of material coarser than 0.063 mm for samples 

collected in the LMR (Cairo, IL, to Head of Passes, LA). .........................................................................73

Table A3. Cross-channel sample grain size distributions of material coarser than 0.063 

mm for samples collected in the UMR (Grafton, IL, to Cairo, IL)............................................................85

Table A4. Cross-channel sample grain size distributions of material coarser than 0.063 

mm for samples collected in the LMR (Cairo, IL, to Head of Passes, LA).............................................86

Table A5. Grain size distributions of material coarser than 0.063 mm for QC by USGS 

sediment laboratory, KY. .............................................................................................................................92

Table A6. Grain size distributions of silts and clays determined by LD method (CHL). ......................94

Table A7. Grain size distributions of silts and clays determined by pipet method for QC 

(USGS Sediment Laboratory, KY)...............................................................................................................94

Table A8. Diameter of largest gravel particle recorded for each sample, 2013..................................95

Table A9. Computed statistics for the 2013 samples.............................................................................97

Table A10. GPS coordinates of sample locations..................................................................................117
MRG&P Report No. 7 viii

Table D1 Particle size distributions of thalweg samples using sieve (>2 mm) and LD (1 

mm>), UMR Grafton to Cairo, IL...............................................................................................................171

Table D2 Particle size distributions of thalweg samples using sieve (>2 mm) and LD (1 

mm>), LMR Cairo, IL, to Head of Passes. .............................................................................................. 173

Table D3 Particle size distributions of cross-channel samples using sieve (>2 mm) and LD 

(1 mm>), UMR Grafton to Cairo, IL. ........................................................................................................184

Table D4 . Particle size distributions of cross-channel samples using sieve (>2 mm) and 

LD (1 mm>), LMR Cairo, IL, to Head of Passes.....................................................................................185

Table D5. Computed statistics for the 2013 samples using sieve (>2 mm) and LD (1 mm>). ......... 191
MRG&P Report No. 7 ix

Preface

The research documented in this report was conducted as part of the 

Mississippi River Geomorphology and Potamology (MRG&P) Program. 

The MRG&P is part of the Mississippi River and Tributaries Program 

(MR&T) and is managed by the U.S. Army Corps of Engineers (USACE), 

Mississippi Valley Division (MVD), and Districts. The MRG&P Senior 

Program Manager was Freddie Pinkard, and the Technical Director was 

Dr. Barbara Kleiss. The MVD Commander was MG Michael C. Wehr. The 

MVD Director of Programs was James A. Bodron. 

Mississippi River engineering direction and policy advice were provided by 

the Mississippi River Commission. The Commission members were 

MG Wehr, USACE; the Honorable Sam E. Angel; the Honorable 

R. D. James; the Honorable Norma Jean Mattei, Ph.D.; RDML Gerd F. 

Glang, National Oceanic and Atmospheric Administration; BG Richard G. 

Kaiser, USACE; and BG David C. Hill, USACE.

This investigation was directed by Roger A. Gaines of USACE-Memphis 

District. The report was prepared under the general supervision of 

David P. Berretta, P.E., Chief, Hydraulics and Hydrology Branch, and 

Donny D. Davidson, Chief, Engineering Division. COL Jeffery A. Anderson 

was Commander of the Memphis District. Organizational support was 

provided by Dr. Barb Kleiss (MVD), Freddie Pinkard (MVK), Thad Pratt 

(ERDC), Dennis Evans (USGS), and Bill Baldwin (USGS).

The investigation was conducted by a collaboration among the following 

offices and agencies: MVD, the U.S. Army Engineer Research and 

Development Center (ERDC) Coastal and Hydraulics Laboratory (CHL), 

the U.S. Geological Survey (USGS), and the U.S. Army Engineer Districts, 

Memphis (MVM), New Orleans (MVN), St. Louis (MVS), and Vicksburg 

(MVK). Funding for the study was provided by MVD. The study was 

conducted between November 2013 and October 2014. The following is a 

list of personnel involved in field sampling:
MRG&P Report No. 7 x

Field Personnel Organization 

Thad Pratt ERDC

Terry Waller ERDC

William Butler ERDC

John Bull ERDC

Mike Kirklin ERDC

Bryan Herring ERDC

Chris Callegan ERDC

Matt Taylor ERDC

Anna Nottmeier USGS

Tyler Franklin USGS

Katie Clancey-Rivera MVS

Ivan Nguyen MVS

Robert Gambill MVM

Brian Hall MVM

Richie McComas MVK

Dana Foxworth MVK

Devon Gijsbers MVK

Lawrence Damba MVN

Gregory Dornier MVN

Direct supervision of the CHL aspects of this effort was provided by Dr. Ty 

Wamsley, Chief of the Flood and Storm Division (CERD-HF); James P. 

McKinney, Chief of the Data Collection and Analysis Branch (CERDHNF); and Dr. Robert McAdory, Chief of the Estuarine Engineering 

Branch (CERD-HFE). COL Jeffrey R. Eckstein was Commander and 

Executive Director of ERDC, and Dr. Jeffrey P. Holland was Director.

MRG&P studies are designed to provide a comprehensive analysis of 

physical forces that influence the flood-carrying capacity and navigability 

of the Mississippi River. Their purpose is to define cause-and-effect 

relationships that result in short- and long-term changes in the stagedischarge relationships of the Mississippi River and to develop improved 

design concepts and criteria for construction of channel stabilization 

works that will improve flood control, navigation, and environmental 

conditions along the river. The Lower Mississippi River Division (LMVD) 

Potamology Programs (T-1) and (P-1) were initiated to address these 
MRG&P Report No. 7 xi

concerns. A summary of the programs and detailed bibliography of works 

related to the Lower Mississippi River Potamology Program can be found 

in Biedenharn et al. (2014). Historical potamology reports and studies can 

be accessed on the internet via 

http://www.mvd.usace.army.mil/Missions/MississippiRiverScienceTechnology/MSRiverGeomorphologyPot

amology.aspx. 

This investigation is directly related to the following previous studies of 

the sediment regime of the Mississippi River Basin:

Phase I, conducted under the earlier USACE LMVD Potamology Program 

(T-1), resulted in the publication of the USACE Waterways Experiment 

Station (WES) technical report Inventory of Sediment Sample Collection 

Stations in the Mississippi River Basin (Keown et al. 1977). 

Phase II resulted in LMVD Potamology Program (P-1) Report 1, 

Characterization of the Suspended-Sediment Regime and Bed-Material 

Gradation of the Mississippi River Basin (Keown et al. 1981). The Phase II 

study identified a decreasing trend in Mississippi River suspendedsediment loads that apparently began approximately in the middle of the 

twentieth century.

Phase III examined suspended-sediment sampling, analysis, and load 

computation procedures using key stations along major streams in the 

Mississippi River Basin and the possible correlation of these procedures 

with the decreasing trend in suspended-sediment loads. Results of Phase 

III were reported in Potamology Program (P-1) Report 5, Downward 

Trend in Mississippi River Suspended-Sediment Loads (Dardeau and 

Causey 1990). 

Phase IV examined existing regime equations and their applicability to 

major alluvial systems, with a principal focus on the effects of changes in 

suspended-sediment loads as they relate to the regime of alluvial rivers.

Phase IV results were published in October 1990 as Potamology Program 

(P-1) Report 6, Impact of Changes in Suspended Sediment Loads on the 

Regime of Alluvial Rivers (Mueller and Dardeau 1990).

There were many entities and individuals who assisted the 2013 sampling 

effort. Sincere appreciation is extended to the U.S. Army Engineer 

Research and Development Center (ERDC), Coastal and Hydraulics 
MRG&P Report No. 7 xii

Laboratory (CHL), for their logistical efforts in assembling the boats, 

equipment, and support staff to get sampling underway. The U.S. 

Geological Survey (USGS) provided quality control (QC) during sampling 

and performed laboratory cross checks. The U.S. Army Engineer Districts 

Memphis (MVM), New Orleans (MVN), St. Louis (MVS), and Vicksburg 

(MVK) staff members completed the sampling teams and contributed to 

the effort’s overall success. Charles McKenzie (CHL), Ivan Nguyen (MVS), 

Brian Hall (MVM) and Richie McComas (MVK) are gratefully 

acknowledged for their efforts processing the 754 sediment samples. Much 

appreciation is expressed to S. Jarrell Smith (CHL) for his invaluable 

assistance with data processing. Additional acknowledgment is extended 

to Charles Little (CHL), David Abraham (CHL), Rob McAdory (CHL), Barb 

Kleiss (MVD), Ty Wamsley (CHL), and Tony Tullos (ITL), whose critical 

reviews, suggestions, and edits significantly improved the report.
MRG&P Report No. 7 xiii

Unit Conversion Factors

Multiply By To Obtain 

degrees Fahrenheit (F-32)/1.8 degrees Celsius

feet 0.3048 meters

inches 0.0254 meters

microns 1.0 E-06 meters

miles (nautical) 1,852 meters

miles (U.S. statute) 1,609.347 meters

pounds (mass) 0.45359237 kilograms

square feet 0.09290304 square meters
MRG&P Report No. 7 1

1 Introduction

Previous efforts

In 1932 and again in 1989, the U.S. Army Corps of Engineers (USACE) 

sponsored efforts to collect and analyze data to investigate bed sediments 

from the Mississippi River channel thalweg between Cairo, IL, and the Head 

of Passes, LA, a distance of 1070 miles in 1932. The reach from Cairo to 

Head of Passes is generally referred to as the Lower Mississippi River 

(LMR) and currently extends for a length of 955 miles. The 1932 data are 

reported in Waterways Experiment Station (WES) Paper Number 17 (WES 

1935). The 1989 data are reported in the USACE Lower Mississippi Valley 

Division (LMVD) Potamology Program Report 7 (Nordin and Queen 1992).

The many changes that occurred on the Mississippi River between 1932 

and 1989 were considered a significant reason for investigating changes in 

the river bed sediments for that period of time. The three predominant 

changes were construction of dams on the Missouri River, shortening of 

the river by cutoffs and channel realignment, and construction of bank 

revetments and training works. Since 1989 there has been a continued 

effort to construct bank revetments and training works, but there have 

been no additional reservoirs or cutoffs. Comparatively, the magnitude of 

changes in the Mississippi River that have occurred between 1989 and 

2013 are not as significant as the changes seen between 1932 and 1989; 

yet, recent data and studies indicate that the LMR continues to adjust in 

response to earlier and on-going construction works. Recent studies 

involving the update of the Low Water Reference Plane (LWRP) in 2007 

indicate continued adjustment in the river profile (USACE 2007). The 

profile adjustments along with field observations signify continued change 

in bed material composition throughout the LMR channel. There were also 

unsubstantiated claims that the bed is finer within the MVN reach than in 

previous sampling programs, and it was conjectured that the bed has 

further coarsened in the upper reaches of MVM. While these claims are 

not directly addressed herein, this report may clarify such questions. 

Current investigation

In 2013, the USACE determined to undertake a sampling program to 

duplicate as closely as possible the previous sampling programs from 1932 
MRG&P Report No. 7 2

and 1989. Concerns with volume and gradation of sediments moving 

through the Mississippi River also pointed to a need to assess sources of 

sediment in the upper reaches of the basin. The Missouri River is a 

predominant contributor of these sediments and was altered by 

construction of major flood control reservoirs on its main channel. For this 

reason, the sampling program was extended to include the Mississippi 

River upstream of the Ohio River confluence to Grafton, IL. The 

Mississippi River upstream of the Ohio River confluence is referred to as 

the Upper Mississippi River (UMR). 

The sampling effort took 9 days to sample from Grafton, IL, to the Head of 

Passes, LA, approximately 95 miles downstream of New Orleans, LA. The 

CHL teams left Vicksburg, MS, on 6 November 2013 and met with MVM 

and USGS staff in Memphis, TN, to review sampling goals. Two of the USGS 

staff joined the CHL teams and continued to Pontoon, IL, and prepared to 

begin sampling at Grafton, IL, the next day. MVS staff joined the teams on 

7 November 2013, and sampling began. Sampling continued through 

14 November 2013, finishing at Head of Passes, LA, at River Mile 0 (RM 0).
MRG&P Report No. 7 3

2 Sampling and Analysis Program

Field sampling

The bed samples were taken by field parties on research vessels from CHL.

Field parties on each vessel were comprised of a core staff of CHL 

researchers, a representative from the USGS, and USACE District staff.

Each District was responsible for providing support staff to sample their 

respective areas of responsibility. Sampling was conducted from two 

vessels that operated over adjacent reaches of the river beginning at the 

upstream-most sampling site within their assigned segment and 

proceeding downstream. Each vessel covered approximately 50–60 river 

miles per day, for a combined 100 river miles being sampled daily. Daily 

reports were provided (Appendix C), which documented the sampling 

progress. Table 1 lists the dates when the various portions of the river were 

traversed along with the number of samples obtained for each District.

Table 1. Samples of bed material of Mississippi River and tributaries. 

River Engineer District River Mile Number of Samples Dates of Sampling 

Upper/Middle 

Mississippi

St. Louis 5–218

Above mouth of Ohio River 110 Nov 7–8, 2013

Mississippi Memphis 595.6–958.8

AHP* 291 Nov 9–11, 2013

Mississippi Vicksburg 321.1–592.1

AHP 183 Nov 12–13, 2013

Mississippi New Orleans 2.8–316

AHP 170 Nov 14–15, 2013

*Above Head of Passes

Sampling vessels

Work was carried out aboard two vessels operated out of the CHL. The craft 

were former U.S. Coast Guard Defender Class vessels that were converted to 

accommodate the sampling missions of the CHL (Figure 1). The vessels 

(length: 25 ft, beam: 8 ft 6 in., draft: 1 ft 8 in., displacement: 8,300 lb) 

provided an ideal platform for conducting this sampling program. The boats 

could be transported by trailer between launch points along the Mississippi 

River. Each boat was equipped with a side-mounted, 1000 lb capacity boom 

aft of the cabin. The boom was fitted with a winch in the form of a crab pot 

puller that facilitated easy handling of the samplers.
MRG&P Report No. 7 4

Figure 1. U.S. Coast Guard Defender Class vessel used in field sampling.

The samplers

The sampling device used was the same WES drag sampler design used in 

1932 and again in 1989, which consists of a 4 in. inside diameter steel pipe, 

4 ft long, closed at one end, and flared to 8 in. diameter at the other end 

(Figure 2 and Figure B7 in Appendix B). The device was attached by means 

of an integral shackle and 0.5 in. diameter rope that fed through a pulley at 

the end of the boom arm. The rope was attached to the shackle with knots 

and could be broken if sufficient tension were applied. Safety was also 

provided by having a knife to cut the line if the sampler became lodged and 

boat stability was in jeopardy.

The sampler is lifted by use of a crab pot puller mounted to the base of a 

boom arm that extends over the side of the boat (Figure 3). Two 

adaptations were incorporated into the original sampler design to aid in its 

handling and sample ejection. First, a D-loop was added on the closed end 

to serve as a handle. Second, an air injection valve was added to the closed 

end to provide a means for using compressed air to eject the sample. 

During actual sampling, it was not necessary to use the air valve.
MRG&P Report No. 7 5

Figure 2. WES drag samplers: (A) Original 4 ft long sampler (top); sampler shortened by 11 in. 

(bottom). (B) Photo of crab pot puller mounted to boom arm on side of boat in transport 

position. (C) With sampler deployed at bottom of river to collect sample. 

After sampling commenced, it was determined that shortening the 

sampler would improve its handling without altering its performance in 

collecting consistent samples. Therefore, two samplers were taken to a 

fabrication shop and shortened by 11 in. (Figure 2A). The shorter samplers 

were found to return the same volume of sample with a significant 

improvement in handling aboard the vessel.

Additional suggested alterations for sampler handling include changing 

the D-handle to provide a better handle. The original D-handles used had 

a radius that made it difficult to grasp without pinching the operator’s 

hand. A proposed alternate handle configuration is shown in Figure B7, 

Appendix B.
MRG&P Report No. 7 6

Figure 3. Crab pot puller and boom after retrieving 

sampler. 

Sampling procedure

The 2013 sampling utilized only the 4 in. diameter pipe dredge in two 

forms: the first was the sampler with a length of 4 ft; the second was the 

sampler with a length of 3 ft 1 in. (original sampler shortened by 11 in.).

The procedure for subsampling the retrieved material described by 

Dr. Fred Ogden1 was followed for the 2013 sampling program.

When sampling with the drag sampler, the vessel navigated to the 

predetermined transect location and ascertained the location of the thalweg.

The drag sampler was then lowered to the bottom and allowed to settle flat 

on the bottom. A length of rope approximately two to three times the flow 

depth was extended to reduce any tendency to pull the sampler up, so the 

sampler dragged almost horizontally along the bed during sampling. The 

vessel was then moved downstream to drag the sampler and collect the bed 

material sample. Once the winch operator determined that the sampler had 

been pulled a sufficient distance to obtain a sample, the sampler was 

retrieved using the crab pot puller and vessel-mounted side boom 

(Figure 3).

 

1 Dr. Fred Ogden, University of Wyoming, personal communication, 2013.
MRG&P Report No. 7 7

The intent of the 2013 sampling program was to replicate prior sampling 

in terms of location and methodology. Nordin and Queen (1992) provided 

a basic description of the methodology used to acquire samples with the 

various samplers. However, there was no detailed description of how 

samples were prepared for transfer to the bags used to transport them to 

the lab for processing. Dr. Ogden, who assisted with the Nordin and Queen 

sampling, was contacted and he provided a detailed description of how the 

pipe dredge samples were processed into bags. Dr. Ogden described the 

method for selecting a representative subsample in the following manner:

1. Empty sampler contents into a steel pan (Figure 4).

2. Mix the sampler contents well with a large spoon by stirring in the pan 

(Figure 5).

3. Select two large scoops of the material and place into sample bags 

(Figure 6).

4. Where coarser material (larger than sand sizes) is in the collected sample, 

examine the material by hand and select the largest particle sizes.

5. Measure the largest particle sizes and record the measurement with the 

sample as the Dmax; place selected Dmax particles into sample bag.

6. Discard remaining material, pack the sample bag to be transported back to

the lab, and then proceed with next sample.

Figure 4. Depositing sample from sampler. 
MRG&P Report No. 7 8

Figure 5. Mixing ejected sample using scoop.

Figure 6. Placing sample material into bags to be sent back to lab 

for gradation analysis.

Sample locations

The 2013 study collected 754 samples between Grafton, IL, and Head of 

Passes, LA. Sample locations were targeted to coincide with locations used 

in previous sampling in WES (1935) and Nordin and Queen (1992), 

although actual locations could vary slightly according to local river and 

weather conditions. On average, one sample was collected every 2–3 river 

miles. Additional sites were added to capture cross-channel variations and 

to acquire data needed for specific model studies. In addition to 
MRG&P Report No. 7 9

resampling the Mississippi River downstream of Cairo, IL, a base-line 

sampling was completed for the UMR between Grafton and Cairo, IL. 

General sample locations are shown in Figure 7; red markers denote UMR 

sites, and Green markers denote LMR sites. Additional location details can 

be found in Table A10, Appendix A, and Figures B1 through B5 of 

Appendix B. The additional transect samples were collected at every tenth 

sample location or as required for specific sediment modeling studies. The 

1989 sampling program documented only three locations where multiple 

samples were taken across the channel, at RM 777.4, 663.9, and 257.6.

Figure 7. Location map of thalweg samples taken 

November 2013. The UMR samples are denoted by 

red markers. 
MRG&P Report No. 7 10

Where transect locations were indicated, five samples were collected: one 

at the thalweg and the other four equally distributed across the remaining 

open water subject to safe boat access. In some cases, it was not possible to 

obtain a total of five samples because of water levels or other situations 

that limited access. A few samples on sand bars were obtained from land 

where access permitted. 

Transect sample names were appended A through E: “A” indicated the 

right descending bank and “E” the left descending bank (Figure 8). All 

thalweg samples were labeled according to RM (e.g., 933.0) unless located 

at a transect, in which case the thalweg was labeled by appending a “T” to 

the sample name (e.g., 926.7 AT), since the thalweg location could be any 

distance across the transect. Water depth for thalweg samples is shown 

graphically in Figure 9 and listed in Table A10.

Figure 8. Multiple sample locations at a transect. 
MRG&P Report No. 7 11

Figure 9. Measured water depth at thalweg sample locations, November 2013. 

Initial laboratory analysis

Collected field samples were shipped to the sediment laboratory at CHL 

for analyses. The following describes steps used during initial sample 

processing. This procedure was later changed as noted in the QC section.

1. Visual inspection of sample: Prior to any analysis all samples were 

visually inspected to determine the integrity of the sample bag and the 

texture of the sample. Samples in bags that had been torn, ripped, leaking, 

or otherwise compromised were placed in a new bag. Samples were then

separated into two categories:

a. Sandy/Gravel

b. Muddy/Fine (The cohesive nature of samples with significant silt 

and clay content precluded them from dry sieving. Proceed directly 

to step six.)
MRG&P Report No. 7 12

Methods for Sandy/Gravel samples only:

2. Dry samples: 

a. Sample bags were opened, rolled down, and placed in the oven at 

75 °C until dry. (Whirl-PakTM samples bags are not rated for 

temperatures over 82 °C. To prevent possible melting or deterioration of the samples bags, drying was accomplished at oven 

temperatures of 75 °C or less.) 

3. Determination of Dmax:

a. Bag contents were poured into a large sample tray/bin, and sample 

was spread out so an easy visual inspection could be made.

b. Large grains that were significantly larger than the majority of the 

sample were identified.

c. Such large grains were extracted from the bulk sample and their 

size measured (longest axis). The number and size of these grains 

were recorded as the Dmax of the sample. These grains were not to 

be weighed and included in the grain size distribution data. 

d. The Dmax grains were placed in a separate sample bag and labeled 

with the appropriate sample name.

Note: Not all samples had a Dmax recorded. This exercise was to remove 

any outlying coarse grains that would bias the weighted percent grain size 

distribution towards a few large grains in the sample. Well-sorted samples 

were likely not going to have a Dmax recorded. In addition, even poorly 

sorted samples may not have had a clear Dmax. Identifying a Dmax was not 

the same as removing all the coarse grains from a sample. The pictures in 

Figure 10 are included to help illustrate samples with and without Dmax

particles.
MRG&P Report No. 7 13

Figure 10. Example samples for determining Dmax. 

4. Split sample: Due to the large volume of sample that was collected in the 

field, it was not possible to analyze the entire sample for grain size 

distribution. To obtain a representative subsample, a sediment splitter was 

utilized as follows:

a. Emptied and wiped out the splitter and catch pans from any 

previous sediment.

b. Poured entire sample through splitter. Tapped splitter as necessary 

to make sure grains fall into catch pans. Grains too large to pass 

through the splitter were split by hand, by adding a grain to each 

catch pan until all grains were removed from the splitter.

c. The above process was repeated until an appropriately sized 

subsample had been obtained. The weight of the subsample was 

determined by the approximate grain size of the sample, in 

accordance with ASTM D6913-04 (2009). Table 2 lists the 

minimum sample mass required for analysis while Table 3 lists the 

maximum sample mass each sieve can accommodate to prevent 

sieve overloading. These two tables should be referenced when 

targeting an appropriate weight of the subsample during the 

splitting process. Table 4 indicates the sieve set used in the 

analyses.

d. Once the appropriate size subsample had been split, it was placed in 

a sample bag and labeled accordingly. The remaining sample 

contents were returned to the original sample bag and kept for 

archival purposes. 
MRG&P Report No. 7 14

Table 2. ASTM standard for sieve sample sizes (modified from ASTM D6913-04, 2009). 

ASTM D6913-04 (2009) 

Maximum Particle Size of Material 

(99% or more passes) Minimum Dry Mass of Specimen, g or kgA 

Alternative Size 

Designation 

Maximum Particle Size, 

mm 

Method A Results 

Reported to Nearest 1% 

Method B Results Reported 

to Nearest 0.1% 

No. 40 0.425 50 g 75 g

No. 10 2.00 50 g 100 g

No. 4 4.75 75 g 200gB

3/8 in. 9.5 165gC D

3⁄4 in. 19.0 1.3 kgC D

1 in. 25.4 3 kgC D

11⁄2 in. 38.1 10 kgC D

2 in. 50.8 25 kgC D

3 in. 76.2 70 kgE D

A Specimen masses should not significantly exceed (by more than approximately 50%) the presorted values because 

excessively large specimens may result in sieve overloading (see section 11.3), increasing the difficulty of 

specimen processing.

B The same as “C” except multiplied by 10.

C These values are based on the mass of an individual spherical-shaped particle, at the given sieve, multiplied by 

100 then 1.2 (factor to account uncertainty), and finally rounded to a convenient number.

D Specimens of this size require composite sieving. The sample sizes required for composite sieving causes this 

sensitivity to be unrealistic for specimens with these larger-size particles.

E Same as “C” except 1.2 factor is omitted.

Table 3. Overloading limits for standard sieve set (from ASTM D6913-04, 2009). 

Alternative 

Sieve 

Designation 

Standard Sieve 

Designation 

Number of 

Grain Layers 

on Given 

Sieve 

Maximum Mass 

Retained on 

200 mm (8 in.) 

Diameter Sieve, gA 

Maximum Mass 

Retained on 

305 mm (12 in.) 

Diameter Sieve, g 

Maximum Mass 

Retained on 370 by 

580 mm (14.6 by 

22.8 in.) Sieve, g 

3 in. 75 mm 0.8 2700 6100 18000

2 in. 50 mm 0.9 2000 4500 13000

1 1⁄2 in. 37.5 mm 0.9 1500 3400 10000

1 in. 25 mm 1 1100 2500 7000

3⁄4 in. 19.0 mm 1 900 2000 6000

3/8 in. 9.5 mm 1.25 550 1200 3600

No. 4 4.75 mm 1.5 325 730 2000

No. 10 2.00 mm 2 180 410 1000

No. 20 850 μm 3 115 260 800

No. 40 425 μm 4 75 170 500

No. 60 250 μm 5 60 140 400
MRG&P Report No. 7 15

Alternative 

Sieve 

Designation 

Standard Sieve 

Designation 

Number of 

Grain Layers 

on Given 

Sieve 

Maximum Mass 

Retained on 

200 mm (8 in.) 

Diameter Sieve, gA 

Maximum Mass 

Retained on 

305 mm (12 in.) 

Diameter Sieve, g 

Maximum Mass 

Retained on 370 by 

580 mm (14.6 by 

22.8 in.) Sieve, g 

No. 100 150 μm 6 40 90 300

No. 140 106 μm 6 30 70 200

No. 200 75 μm 6 20 50 100

A For sieve sizes other than those listed above, determine the surface area of the sieve(s) cloth being used in m2 and 

divide this number by 0.028m2 (the appropriate surface area of a 200 mm or 8 in. diameter sieve). Then, multiply this 

area ratio by the masses listed in this column to form a column of acceptable masses for the different sieve area of 

interest. Round these values so the significant digits are similar to those presented.

5. Sieve sample: The sieves utilized for this study can be found in Table 4 

below. Samples were sieved down to a 1000 μm sieve (#18 ASTM). 

Particles that passed the 1000 μm sieve were split as necessary and further 

analyzed for grain size distribution by laser diffraction (LD). The sieving 

procedure is described in the following steps a through e:

a. Record initial weight of sample to be introduced to sieve stack.

b. Clean and record the tare weight of all sieves and the catch pan to 

be utilized.

c. Introduce sample to sieve stack and place in a Rotap shaker for 

minimum of 10 minutes.

d. Reweigh sieves and pan and record sample weight. Make sure that 

sample weights in each sieve do not exceed those listed in Table 3.

e. Transfer sample from catch pan to sample bag. Label and store for 

LD analysis.

Table 4. Sieve stacks used for grain size distribution measurements. 

Sieve openings 

ASTM 2.5” 1.25” 5/8” 5/16” 5 10 18 35 60 120 230

Mesh Size 

(μm) 63000 31500 16000 8000 4000 2000 1000 500 250 125 63

6. Laser diffraction (LD): When possible, grain size analysis was 

performed by LD using a Malvern Mastersizer 2000 to measure the 

particle size distributions. The procedures used to analyze samples with 

this equipment are listed below.
MRG&P Report No. 7 16

Sandy Samples < 1000μm

a. Split sample recovered from the sieve catch pan as necessary to 

obtain appropriate size subsample for LD analysis.

b. Deflocculate overnight in a solution of sodium metaphosphate 

(40g/L). 

c. Pass sample through a 1000 μm (#18 ASTM) sieve into the instrument’s reservoir to remove any large organic debris from the sample. 

Continue to add sample until obscuration level is between 5% to 

20%. If possible, introduction of the entire subsample is preferred.

d. Sonicate sample in reservoir for 60 seconds prior to analysis.

e. Run sample.

Muddy/Fine samples (continued from Step 1)

a. Homogenize sample by stirring with spatula or spoon.

b. After mixing, take two subsamples of the sediment of 

approximately equal size (2–5 grams). Place samples in preweighed 

beakers. Record the weights of both subsamples.

c. Place one of the subsamples in the drying oven at 75 °C. Once dry, 

reweigh the sample and record the dry weight. If needed, these 

weights will be used to determine the water weight of the sample.

d. The other subsample should be dispersed overnight in a solution of 

sodium metaphosphate (40g/L).

e. Stir sample using magnetic stir bar and stir plate.

f. Using an eye dropper, pass sample through a 1000 μm (#18 ASTM) 

sieve into the instruments reservoir to remove any large organic 

debris from the sample. Continue to add sample until obscuration 

level is between 5% to 20%. 

g. Note any grains that are retained on the sieve. If there are only a 

few grains, these will need to be measured and recorded as Dmax

(see step 3). If there are numerous grains on the sieve, they will 

need to be retained, dried, and sieved (see step 5).

h. Run sample.

7. Grain size distribution calculation: The LD grain size data were 

exported from the instrument into an excel file. These data were then 

appended to the appropriate sieve data to each sample in this Excel file. A 

grain size distribution was calculated by combining the two data sets using 

a Matlab script as described under the section on merging sieve and LD 

results.
MRG&P Report No. 7 17

Quality control (QC)

An independent check of the CHL sediment analysis was included in the 

original study scope. This check included duplicate analysis of 10% of 

samples by the USGS Kentucky Water Science Center Sediment 

Laboratory. 

The QC samples were selected from two pools of samples that were 

processed at the CHL. Samples were selected randomly from each of the 

pools. A random number generator was used in Excel to seed a lookup 

function whereby sample names were pulled from each group of samples.

Original sample material was split using standard sample splitting 

techniques described previously. One part was processed using CHL 

facilities and techniques. The remaining part was shipped to the USGS 

sediment lab in Kentucky for analysis using their standard techniques.

USGS lab techniques used mechanical sieve analysis for particle sizes 

larger than 0.0625 mm and the pipet method for particle sizes finer than 

0.0625 mm. Shreve and Downs (2005) provides a description of 

laboratory procedures at the USGS Kentucky Sediment Lab. 

Table 5 provides a list of samples analyzed at the USGS sediment lab.

Table 5. QC samples sent to USGS sediment laboratory for processing. 

Count 

Sample Name 

Sample Pool 1 Sample Pool 2 

1 U10 235.0

2 U30A 268.4

3 U131D 269.5A

4 U145 269.5 B

5 U175 304.2

6 U184 312.8 C

7 U188 338

8 U192.5 353.7

9 U195.5 MOA 408.7 B

10 U196C 415

11 33.0E 427.5 A

12 44.8 432

13 221.3C 466.7

14 508.6 476.6 D

15 566.0CT 488.2
MRG&P Report No. 7 18

Count 

Sample Name 

Sample Pool 1 Sample Pool 2 

16 595.6AT 516

17 595.6B 525.3 C

18 623.1 525.3 E

19 625.5 527.4

20 632.1 541.5

21 641 542.9

22 664.9 545

23 677.5 556.8

24 687.6 ARK CT

25 692 ARK D

26 705.0C 2.8B

27 754.3A 2.8E

28 764.8 26

29 764.8 42.8

30 770.3 55.4

31 773.4A 86

32 797.5 116.7

33 804.5 204.8

34 848.2 221.3B

35 856 221.3C

36 862.7B

37 864.5

38 870

39 879.8AT

40 879.8C

41 882.2

42 890.5

43 897.9E

44 901

45 916.8

46 927.9

47 933.0A

48 938.8

49 ARKA

50 GRA3C

51 SRR11.1AT
MRG&P Report No. 7 19

Once results from the USGS laboratory became available, they were 

compared with the CHL results. Comparison of sieve results indicated that 

percentage finer values were in good agreement for particle sizes 1.00 mm 

and larger. However, distributions for particles finer than 1.00 mm did not 

agree. Figure 11 shows the QC results between the CHL and the USGS. 

Investigation into why the percent finer values 1.00 mm and smaller 

differed between the two methods pointed to differences between 

conventional sieving techniques employed by the USGS and the CHL

techniques, which used a combination of sieving (64 to 1 mm) and LD 

(< 1 mm). Eshel et al. (2004) indicate that LD results, which are partially 

dependent on particle shape, would typically yield coarser sizes than would 

be obtained with conventional sieve analysis. In other words, sieving biases 

toward a minimum particle diameter whereas LD may bias toward a 

maximum diameter. As a result, there is good agreement for sieved QC 

samples (dashed oval, Figure 11) but significant divergence for percent finer 

values less than 1 mm, which were obtained by LD. Figure 12 is an expanded 

view of the inset of Figure 11 and illustrates the considerable variability 

when comparing percent finer values less than 0.125 mm. In addition, it 

also shows the lack of data points available for comparison of percent finer 

values less than 0.063 mm, which is due to the paucity of fine-grained 

samples in the QC sample list. Conversely, Figure 13 shows fair agreement 

for grain sizes greater than 2.00 mm; here, variability increases for larger 

size classes likely due to grain underrepresentation. This trend was verified 

across all QC samples evaluated in this study.

The differences between LD and conventional sieve analysis results for 

sizes between 0.063 mm and 1.00 mm were significant because the intent 

of this study was to replicate previous study efforts and to make 

comparisons between the earlier data sets. It was therefore determined 

that the CHL sample analysis would be repeated using additional sieve 

sizes down to a No. 230 (0.063 mm) sieve. Final CHL results for particles 

sizes less than 0.063 mm were derived from LD techniques. 
MRG&P Report No. 7 20

Figure 11. Comparison of size fraction results for QC samples (particle sizes less than 2.00 mm to 

less than 0.063 mm). QC results show good agreement for sieve-only samples (dashed oval). 

Inset shown in Figure 12. 

Figure 12. Comparison of size fraction results for QC samples 0% to 10% composition (particle 

sizes less than 2.00 mm to less than 0.063 mm). 

(mm)
MRG&P Report No. 7 21

Figure 13. Comparison of size fraction results for QC samples 50% to 100% composition 

(particle sizes less than 31.50 mm to less than 4.00 mm). 

Revised CHL procedure

Following QC checks, all samples processed by CHL were resieved using 

standard sieves down to a No. 230 size as indicated in Table 4. Samples 

processed in the finer mesh sieves had to be washed following ASTM 

protocols. The additional sieve results were then merged with previous 

sieve data to obtain the sample grain size distribution. Particle size 

percentages for sizes smaller than 0.063 mm were taken from the Malvern 

LD data. The data were merged using the methods described below.

Note: The previous 1932 and 1989 studies used conventional sedimentation methods (pipet or hydrometer) for analysis of fine particle gradations: 

particle sizes smaller than 0.063 mm. Present practice is transferring to use 

of LD techniques that require significantly less analysis time. Data obtained 

from the present sample analysis was done using both techniques and 

provides insight into how the two methods compare. Such comparisons may 

be valuable when using size fraction results derived from both techniques in 

numeric sedimentation models. Data for the present investigation are given 

for both laboratory methods; however, with the exception of particles < 

0.063 mm, study findings are based upon the conventional mechanical 

sieve methods for consistency in comparing results with previous work.

50

55

60

65

70

75

80

85

90

95

100

50 60 70 80 90 100

ERDC PERCENT FINER

USGS PERCENT FINER

%< 4.00mm %< 8.00mm %< 16.00mm %< 31.50mm
MRG&P Report No. 7 22

Recommended procedure: For future comparisons, use sieve analysis 

down to particle sizes of 0.063 mm (#230 standard sieve) and then use LD 

for sizes less than 0.063 mm. This recommendation is based on experience 

gained from processing more than 700 samples. The experience shows 

that the amount of time required to fully process a sample using both sieve 

(> 1.00 mm) and LD methods (< 1.00 mm) provided no net time savings 

over using sieves. Using this recommended procedure also maintains 

consistency with decades of percent composition data determined from 

prior sediment samples.

Merging sieve and LD results

Mechanical sieve analysis is one of the most commonly used and reliable 

methods to determine the grain size distribution of a soil sample but is 

typically limited to grain sizes greater than 0.063 mm (very fine sand). 

Sedimentation techniques, such as the hydrometer and pipet methods, are 

traditionally used to obtain the silt and clay fractions. More recently, 

however, LD methods are increasingly utilized, which can size particles 

ranging from 0.02 μm up to 3.00 mm (depending on instrument 

manufacturer). Thus, determination of a complete grain size distribution 

spanning gravel to clay is not possible using a single methodology; 

therefore, the integration of data from different measurement techniques 

is required. As a result, a Matlab program was developed at the CHL to 

accomplish this task in a consistent manner. Theory of LD can be found on 

manufacturers’ websites (such as Malvern or Horiba) and the 

International Standards Organization (ISO Catalog 13320:2009).

The weight and volume percent obtained from mechanical sieving and LD, 

respectively, are tabulated on a standardized spreadsheet (Figure 14). The 

program truncates the LD data at the truncation bin, which is automatically 

set at the truncation diameter according to the lowest test sieve used in the 

mechanical sieve analysis, in this case 0.063 mm (Figure 14). This is similar 

to the procedure by Dinis and Castilho (2012). The mass fraction of sieved 

material that passes the lowest test sieve is referred to as flaser. The program 

then applies a weighting function to the LD data equal to flaser, then adjusts 

the sieved data by the factor (1 - flaser). Since LD data are reported as a 

volume percent (converted from optical intensity) and sieve data as a weight 

percent, it is assumed that the particles are of equal density (2.65 g/cm3) 

and that small variations in density do not significantly affect the results, 

even for significant quantities of heavy minerals (Dinis and Castilho 2012). 
MRG&P Report No. 7 23

Figure 14. Spreadsheet example used to combine LD and sieve results in a Matlab script. LD volume percent 

results are normalized by the sieve fraction < 63 μm (0.063 mm) given by flaser at the truncation diameter. The 

sieve weight percent is then normalized by (1-flaser). 

The frequency and cumulative distributions for each sample are 

automatically calculated at user-defined size class boundaries. Grain size 

statistics are calculated by linear interpolation of the log-transformed 

cumulative distribution at user-defined percentiles. An example of the 

results of the merging process can be seen in Figure 15. For this sample, 

the LD frequency distributions were weighted by 0.581 (flaser) while the 

sieve data were weighted by 0.419 (1 – flaser) to obtain a combined 

frequency distribution (solid blue line in Figure 15). If flaser is small, the 

combined frequency distribution approximates the distribution obtained 

by sieve analysis (Figure 16).

Figure 15. Example merged grain size distribution of sample (RM 11.9) with large mud 

percentage (flaser = 58%) by combining sieve and LD distributions. 
MRG&P Report No. 7 24

Figure 16. Example merged grain size distribution of sample (U196CT) with 0% mud. Note 

that the combined distribution is therefore the same as that obtained by sieving. 

Analysis of samples containing significant mud content

Samples that were visually identified as having potentially high mud 

content were originally removed from the population to be analyzed solely 

by LD. However, considering the bias of LD relative to mechanical sieving, 

and considering that many of these samples contained significant 

quantities of sand (0.063 – 1.00 mm), it was desirable to determine size 

distributions by a combination of washing (to remove the fines), sieve 

analysis, and LD to better compare to previous data sets. Determination of 

the fraction of fines (< 0.063 mm) by washing was used to weight the LD 

data (i.e., to obtain a new value for flaser). The procedure is similar to wet 

sieving with the important distinction that no attempt is made to collect 

the material passing the No. 230 sieve, since a large quantity of sediment 

is needed to obtain enough material for sieve analysis. The method is 

described as follows:
MRG&P Report No. 7 25

Determination of the fraction of fines

• Samples containing more than 10% fines (as estimated by previous LD 

results) were selected for the procedure. To determine the fraction of 

fines, approximately 20–30 g of sample were obtained for washing. 

• Samples were allowed to dry for 24 hours to obtain the prewashed dry 

mass on preweighed sample trays.

• Samples were rewetted and gently disaggregated using a wooden 

pestle. 

• Using a spray nozzle, each sample was gently washed through a 

No. 230 (63 μm) sieve until the effluent appeared to run clear. 

• Residual sand content was removed from the sieve, dried for 24 hours 

and re-weighed. 

• The sample fraction of fines is calculated as the difference between the 

pre- and postwashed dry masses. The fraction of fines lost was used as 

the new flaser to weight the truncated LD data. 

Sieve analysis of samples with high mud content

• 200–400 g of wet sample were washed through a No. 230 sieve to 

remove the fines. 

• After drying, samples were sieved at 1 phi intervals from 2.00 mm to 

0.063 mm using standard ASTM procedures. 

• The mass frequency distributions are then normalized by multiplying 

by the percent of sand retained (1 - flaser) as determined from the 

washing procedure described above. 

• If present, the mass percent of any material left in the pan (typically 1% 

or less) was added back to the mud fraction lost by washing.

Of the 51 samples selected, only 31 had enough sand remaining after 

washing to make sieving possible; consequently, the remaining 20 samples 

were analyzed solely by LD.

Data developed for use in the current analysis are shown in Appendix A 

and are based on sieve results for particle sizes larger than 0.063 mm and 

LD results for particle sizes smaller than 0.063 mm.

Appendix D shows data developed using sieve results for particle sizes 

2.00 mm and larger and LD results for particle sizes smaller than 2.00 

mm. These data were not used in computing sample statistics or in 

interpreting results for the present report.
MRG&P Report No. 7 26

Variability in processed data

Differences between results obtained using the sieve-pipet (SP) method or 

LD method identified a need to review variability within the two methods.

To assess variability, a series of 10 replicate analyses using both methods 

was run using a single sample as the source of material. The primary focus 

of the assessment was for finer particle sizes because standard sieve 

analysis was used to determine weights for larger particle sizes. Sample 

GRA3C was selected for this analysis because it consisted of mostly finer 

material and had been one of the original QC samples.

Sample GRA3C was split as part of the original sample analysis; one part 

was analyzed at the CHL, and the other part was analyzed at the USGS 

laboratory. In the variability analysis, each lab took the material from 

GRA3C and performed 10 independent analyses to determine the particle 

size gradations for each run. The USGS utilized the SP method for their 10 

replicates while the CHL utilized the LD method.

The results from replicate analysis for the LD and SP methods, shown in 

Figures 17 and 18, provided two significant findings. First, as expected, the 

LD method produced coarser particle size distributions than the SP method 

in the very fine to medium sand size classes (0.063–0.5 mm) and for 

medium silt (0.004–0.016 mm) as shown in Figure 19B; consequently, the 

D50 grain size obtained from LD is larger than that of the SP method 

(roughly 0.70 mm versus 0.50 mm; Figure 19A). Second, the SP method 

significantly overestimates the clay fractions relative to LD (Figure 19B). 

Similar results are reported in the literature (Konert and Vandenberghe 

1997; Buurman et al. 2001; Blott and Pye 2006; Rodriguez and Uriate 

2009; Ferro and Mirabile 2009; Di Stefano et al. 2010). Whereas LD 

estimated the clay fraction (% < 0.002 mm) as 1% or less, the SP method 

estimated the clay fraction at nearly 15%. Results from sedimentation 

methods such as the SP method may consistently overestimate the fine silt 

to clay fractions due to disturbances from sample withdrawals, Brownian 

motion, and particle shape, all of which influences the rate of sedimentation 

(Syvitski et al. 1991). In addition to the clay fraction, Figure 19B also shows 

that the largest discrepancies between SP and LD occur in the 0.25–

0.50 mm and 0.004–0.016 mm size classes. Conversely, the major 

variations in LD results for a single sample are methodological; in this case, 

pipet (eye-dropper) withdrawals from a sample slurry result in random 

variations of sample representativeness (Figure 17). However, for a single 

analysis (i.e., three successive runs of the same subsample), the Malvern 
MRG&P Report No. 7 27

demonstrates excellent repeatability (Figure 20). Since larger grain sizes 

make up a larger proportion of the volume percent, the uncertainty of a 

single analysis increases toward larger size classes.

Successive runs using LD on the same subsample produced different 

results; each successive run yielded smaller particle sizes for the same 

percent finer values. The standard procedure for LD processing included 

withdrawing a very small aliquot (or draw) from the prepared subsample 

using a pipet, then analyzing it using the Malvern Mastersizer 2000 to 

determine size fractions. The Malvern was set to perform three 

measurements using the draw and provided the average as final output. In 

an attempt to understand how the withdrawal of consecutive small 

aliquots of the original subsample affected results, three successive draws 

were made and run using the Malvern. As shown in Figure 21, repeated 

draws from the same prepared subsample produced percent finer data 

with smaller particle sizes for each successive draw.

Figure 17. CHL results of variability runs for cumulative percent finer for particle sizes using LD method 

with Malvern Mastersizer 2000. Each run represents a subsample of material from GRA3-C and is the 

average of three instrument measurements. 
MRG&P Report No. 7 28

Figure 18. USGS results of variability runs for cumulative percent finer for particle sizes using the SP 

method. 
MRG&P Report No. 7 29

Figure 19. Comparison of particle size analysis in terms of a cumulative distribution (A) and volume 

percent distribution using SP (USGS) and LD (CHL) methods. 
MRG&P Report No. 7 30

Figure 20. Examples of instrument variation between subsamples of material from sample GRA3C 

using the LD method. Variations between subsamples (Run 1 vs. Run 2) are due to changes in sample 

representativeness; however, the Malvern shows excellent repeatability for each subsample. 
MRG&P Report No. 7 31

Figure 21. LD results from successive draws from a single sample slurry. Percent finer values increase 

with each draw from the sample slurry. 
MRG&P Report No. 7 32

3 Results

2013 Thalweg data

The grain size distribution of material coarser than 0.063 mm for samples 

collected in November 2013 are provided in Appendix A, Tables A1 and A2.

These data are divided into two groups: one group includes samples taken 

from the UMR between Grafton and Cairo, IL; the other group includes 

samples taken from the LMR between Cairo, IL, and Head of Passes, LA.

The data for the UMR provides new baseline information, but no historic 

data exist that can be used for comparisons. The data for the LMR attempts 

to replicate previous investigation locations from the 1932 and 1989 

sampling programs.

Several statistical parameters were computed using the grain size 

distributions for the samples. These statistics are the D16, D50, D84, the 

sorting coefficient, and the mean grain diameter. The D16 is defined as the 

size of particle for which 16% of the sample is finer, by weight. The D50 

(median) and D84 are defined similarly (Figure 22).

Figure 22. Definition sketch for grain size distribution plotted on a linear scale. 

The sorting coefficient (σ) provides a measure of the uniformity of the 

sample. As the sample approaches a composition having entirely the same 

size grains (perfect uniformity), the sorting coefficient approaches a value 

of 1.0. The wider the variation in grain sizes present in the sample, the 

larger the sorting coefficient. The sorting coefficient is defined as follows:

0

10

20

30

40

50

60

70

80

90

100

-1 0 1 2 3 4 5

Cumulative Percent Finer, %

Grain Diameter, D 

D10 D16 D50 D84 D90 Dmax

16

84

Grain Size 

Distribution 

Curve
MRG&P Report No. 7 33

DD DD / /  Sg   84 50 50 16

2

In the literature, this sorting coefficient equation may also be referred to 

as a gradation coefficient equation, commonly used by engineers (Bunte 

and Abt 2001). This is similar to the graphic geometric sorting coefficient 

used by sedimentologists (SSgg,ssss = �DD84⁄DD16) but gives slightly different 

values. 

The mean grain diameter is determined by the method of moments (i.e., 

the weighted average grain size for the sample). It is calculated by 

multiplying the frequency (ffii) of the size class i (in percent) by the 

midpoint of the size class i (mmii), summing, and dividing by the sum of the 

percentages representing each size as described in Folk (1966):

i i

m

f m

Mean Grain Diameter, D f 



The computation of mean diameter tends to emphasize the larger particle 

sizes. Even a very small quantity of large material can significantly raise 

the mean grain diameter. For this reason, field sampling visually identified 

maximum particle sizes and separated the largest of those particles into 

individual containers for subsequent lab analysis. These largest particles 

were not included in the overall sample gradation analysis because they 

were not representative of the entire sample and would have biased 

calculation of the individual size fractions. Maximum particle sizes (Dmax) 

for samples are listed in Table A8, Appendix A. Grain size distributions for 

2013 samples are tabulated in Tables A1 and A2 of Appendix A.

Sediments of the UMR are composed chiefly of medium-coarse sands and 

gravels (Figure 23). The reach-averaged D50 grain diameter for the UMR 

was calculated as 0.74± 0.70 mm whereas the mean diameter, as 

calculated by the moment method, was 1.96 ± 2.1 mm. No trend in grain 

size was identified from these parameters. 

Sediments of the LMR are composed chiefly of coarse to fine sands. The 

reach-averaged D50 grain diameter in the LMR decreases downstream from 

approximately 0.6 mm to o.18 mm, typical of deltaic rivers (Figure 24). 
MRG&P Report No. 

7 34

Figure 23. Variability for D50 sizes, UMR, Grafton, IL, to Cairo, IL. 
MRG&P Report No. 

7 35

Figure 24. Variability and trend for D50 sizes, LMR, Cairo, IL, to Head of Passes, LA. 
MRG&P Report No. 7 36

The 2013 sediments were generally finer and more uniform than 

sediments collected in 1932 and 1989, though few changes occurred 

between 1989 and 2013. The reach-averaged LMR mean grain diameter 

was 0.71 ±1.1 mm compared to 1.67±3.57 mm and 0.75±1.61 mm for 1932 

and 1989, respectively. In the same way, the reach-averaged D50 grain 

diameter was 0.40±0.22 mm for 2013, compared to 0.96±2.64 mm and 

0.46±1.29 mm for 1932 and 1989, respectively. Similarly, the reachaveraged sorting coefficient was 1.93 for 2013 while those for 1932 and 

1989 were 2.40 and 1.67, respectively.

Comparison of 2013 thalweg data with 1989 and 1932 datasets

Comparisons were made for the Cairo, IL, to Head of Passes reach only.

No prior bed material particle gradation data for the Grafton to Cairo, IL, 

reach was available to make similar comparisons. The data collected in 

2013 for the Grafton to Cairo, IL, reach form a baseline dataset for future 

comparisons.

Matching 2013 locations with 1932 and 1989 locations

Between 1932 and 1988, the Mississippi River endured numerous 

engineering efforts. In the late 1930s and early 1940s, the overall channel 

length was shortened by 150 miles by construction of meander cutoffs, and 

few river training structures existed prior to 1942. As a result, this 

permitted a higher degree of freedom to erode the banks than existed prior 

to widespread use of revetments and training structures beginning in the 

1950s. Even between 1989 and 2013, lateral migration continued to 

produce changes in channel thalweg location. Furthermore, the 

delineation of river mileage was changed in 1962 (with river miles 

beginning with RM 0 at the Head of Passes, LA, and increasing upstream), 

which further complicated the conversion of locations to a consistent river 

mile. Cairo is now at RM 954.6, whereas in 1932 sample locations were 

identified by river miles measured downstream of Cairo, IL. Therefore, 

matching river locations between the studies was not accomplished 

without some difficulty.

Nordin and Queen (1992) used the descriptions of sample locations in 

Paper No. 17 (WES 1935) and a set of navigation maps of the LMR dated 

1938 to identify most of the 1932 sample locations. Navigation charts were 

used to transfer these locations to 1988 navigation charts using latitude 

and longitude lines for reference. Each USACE District office reviewed its 
MRG&P Report No. 7 37

reach of river to finalize target sample locations. Final sample location was 

then refined based on hydrographic soundings to locate the cross-section 

thalweg.

Actual positions for 2013 field samples in geographic coordinates are given 

in Table A10. Details of the method used for transfer of 1932 sample 

locations to the 1989 charts can be found in Nordin and Queen (1992). 

Sample locations in 2013 were based on the same 1962 river mileage above 

Head of Passes as used in 1989.

Comparing grain size distributions

Due to the difference in the sediment grade scales used in the analysis of 

the 1932 and 1989 samples (U.S. Bureau of Soils classification in 1932 and 

the extended Wentworth scale in 1989), Nordin and Queen converted the 

results of the 1932 analysis to the extended Wentworth scale. This was 

accomplished using log-normal interpolation as described by Stevens and 

Hubbell (1986).

For the samples collected in 1932, percent finer quantities were reported 

in Nordin and Queen for the following size classes: 2.00 mm, 1.00 mm, 

0.50 mm, 0.125 mm, and 0.062 mm. For direct comparison with the 1932 

data, the cumulative distributions of the 1989 and 2013 data are summed 

for size classes greater than 2.00 mm. 

Data and statistics for the earlier datasets are tabulated in Nordin and Queen 

(1992). The Nordin and Queen report and data are readily available via 

internet and are not repeated in this report. Pertinent plots developed from 

the previous data are included to facilitate comparisons (Figures 27–28).

The grain size distributions for each size class were averaged by 25-mile 

reaches then plotted for each of the 2013, 1989, and 1932 data sets as 

shown in Figures 25–28, respectively. These stack plots illustrate the 

relative contribution of a particular size class as a percent of the total 

sample.

General trends

The 2013 bed material percent compositions of the UMR and LMR reaches 

are presented in Figures 25 and 26, respectively. Similarly, bed material 

compositions of the LMR for 1989 and 1932 are presented in Figures 27–28. 
MRG&P Report No. 

7 38

Figure 25. Composition of 2013 thalweg bed material averaged by 25-mile reaches, UMR: Grafton to Cairo, IL. 
MRG&P Report No. 

7 39

Figure 26. Composition of the 2013 thalweg bed material averaged by 25-mile reaches, LMR: Cairo, IL, to Head of Passes, LA. 
MRG&P Report No. 

7 40

Figure 27. Composition of the 1989 bed materials averaged by 25-mile reaches, LMR, Cairo, IL, to Head of Passes, LA (data from Nordin and 

Queen 1994). 
MRG&P Report No. 

7 41

Figure 28. Composition of 1932 bed materials averaged by 25-mile reaches, LMR, Cairo, IL, to Head of Passes, LA (data from Nordin and Queen 

1994). 
MRG&P Report No. 7 42

The percent composition graphs illustrate that the 2013 data have less 

variability than either the 1989 or 1932 data for all particle size ranges 

(Figures 26–28), which is also supported by sorting coefficient 

calculations. Since 1932, the relative fractions of gravel and very coarse 

sand decreased in the upper reaches (above RM 500) while the relative 

fractions of clay, silt, and very fine sand have decreased throughout the 

entire length of the LMR, mostly downstream of Baton Rouge (RM 200). 

These size fractions have been replaced by fine, medium, and coarse 

sands. Essentially, bed materials have fined upstream of RM 500 and 

coarsened below RM 500 (Table 6 and Figure 29).

Table 6. Percent composition of Mississippi River bed materials averaged across reach indicated, 

Cairo, IL, to Head of Passes, LA. 

Figure 29. Actual percentage change in Mississippi River bed compositions from 1932 to 2013. 

Study year Reach (Miles above HOP) Silt & Clay VF Sand F Sand MD Sand C Sand VC Sand Gravel

1932 950 - 750 0% 3% 4% 29% 33% 12% 18%

750 - 500 1% 5% 9% 44% 27% 5% 9%

500 - 250 3% 11% 15% 47% 16% 2% 8%

250 - 0 10% 26% 33% 30% 1% 0% 0%

1989 950 - 750 0% 0% 9% 42% 31% 9% 9%

750 - 500 2% 1% 14% 51% 25% 4% 4%

500 - 250 1% 1% 28% 54% 12% 1% 2%

250 - 0 8% 6% 54% 28% 2% 0% 0%

2013 950 - 750 0% 1% 7% 40% 38% 8% 7%

750 - 500 1% 0% 9% 49% 31% 5% 6%

500 - 250 0% 0% 23% 63% 10% 1% 2%

250 - 0 5% 2% 63% 27% 2% 0% 0%

 

 , 

-30% -20% -10% 0% 10% 20% 30% 40%

Silt and clay

VF Sand

F Sand

MD Sand

C Sand

VC Sand

Gravel

Percentage change within reach indicated (1932 - 2013)

250 - 0 500 - 250 750 - 500 950 - 750
MRG&P Report No. 7 43

The absolute differences in the percent compositions between each data 

set were calculated to illustrate the downstream magnitude of change for 

different size classes between study periods (Figures 30–35). As follows, a 

negative value on these plots indicates a smaller percentage of material in 

that class in 2013 when compared to 1989 or 1932.

Gravel (>2.00 mm)

In 1932, bed materials greater than 2.00 mm were prevalent in relative 

abundance along the LMR, averaging from 18% near Cairo, IL, to 5% near 

RM 250. When averaged between Cairo, IL, and RM 750, gravel content 

decreased to 9% by 1989 and 7% by 2013. Between RM 750 and RM 500, 

average gravel content changed from 9% in 1932 to 4% in 1989 then 

increased slightly to 6% by 2013, although the percentage of gravel near 

the confluence of the White and Arkansas Rivers (near RM 550) changed 

little. Between RM 500 and RM 250, average gravel content changed from 

8% in 1932 to 2% by 1989 with no change since. 

Very coarse sand (1.00–2.00 mm)

The magnitude and spatial extent of very coarse sand has changed little 

since 1932, aside from a slight reduction from 12% to 9% between Cairo, 

IL, and RM 750 with little change since 1989.

Coarse sand (0.50–1.00 mm)

The coarse sand fraction, present only to RM 150 in 1932, advanced to Head 

of Passes by 1989 and continued to represent a small percentage in 2013. 

Upstream of RM 500, coarse sand decreased slightly by a few percent 

between 1932 and 1989 but exceeded 1932 values in 2013 by 4%–5%. 

Medium sand (0.25–0.50 mm)

A pronounced increase in medium sand content occurred since 1932, 

especially within the reaches RM 950–750 (29% to 40%) and RM 500–250 

(47% to 63%); abundances were even slightly higher in 1989. However, a 

small, 2% reduction occurred in the lower reaches (RM 250–0) with no net 

change since 1989. 
MRG&P Report No. 

7 44

Figure 30. Difference in percentage of Gravel (>2 mm) between 2013, 1989, and 1932 samples averaged by 25-mile reaches. 
MRG&P Report No. 

7 45

 

Figure 31. Difference in percentage of very coarse sand (1 mm) between 2013, 1989, and 1932 samples averaged by 25-mile 

reaches. 
MRG&P Report No. 

7 46

Figure 32. Difference in percentage of coarse sand (0.5 mm) between 2013, 1989, and 1932 samples averaged by 25-mile reaches. 
MRG&P Report No. 

7 47

Figure 33. Difference in percentage of medium sand (0.25 mm) between 2013, 1989, and 1932 samples averaged by 25-mile reaches. 
MRG&P Report No. 

7 48

Figure 34. Difference in percentage of fine sand (0.125 mm) between 2013, 1989, and 1932 samples averaged by 25-mile reaches. 
MRG&P Report No. 

7 49

Figure 35. Difference in percentage of very fine sand (0.0625 mm) between 2013, 1989, and 1932 samples averaged by 25-mile 

reaches. 
MRG&P Report No. 7 50

Fine sand (0.125–0.25 mm)

Upstream of RM 500, fine sand abundances increased from 4%–9% in 

1932 to 9%–14% in 1989. Below RM 500 the increases are more dramatic; 

a near doubling of fine sand abundance occurred between RM 500–250 

(15% to 28%) while the reach below RM 250 increased from 33% to 54%. 

Since 1989, the abundance within the reach RM 500–250 decreased 

slightly from 28% to 23% while there was a corresponding increase below 

RM 250 from 54% to 63%, which may indicate migration of these 

materials downstream.

Very fine sand (0.062–0.125 mm)

Most significant is the marked reduction in very fine sand content 

throughout the LMR, especially downstream of RM 250 where these 

materials were replaced by fine sands. Between 1932 and 1989, very fine 

sand content had reduced to near zero values between RM 950 and 400 

with a small exception at RM 600; this pattern continued to 2013. Below 

RM 250 very fine sand decreased from an average of 26% in 1932 to 6% 

and 2% in 1989 and 2013, respectively. 

Silt and clay (<0.062 mm)

The 1935 WES report (WES 1935) did not separate the <0.062 mm 

fraction into silt and clay sizes; therefore, comparisons of clay abundance 

are only made between 1989 and 2013. 

Very little to no change occurred in the silt and clay fractions above RM 

500 between 1932 and 2013. Below RM 250, however, silt and clay 

reduced from an average of 10% in 1932 to 8% in 1989 and finally to 5% in 

2013. Between RM 25 and RM 0, the silt and clay fractions have replaced 

the very fine sand present in 1989. It is unknown whether the fine sand 

signature in lower 25 miles is due to burial, in contrast to displacement, of 

silts and clays.

Comparison of mean, D16, D50, and D84 diameters

Particle sizes for D16, D50, D84, and Dm size fractions were also plotted for the 

three study periods (2013, Figure 36; 1989, Figure 37; 1932, Figure 38). The 

D16 values for 2013, 1989, and 1932 are compared in Figure 39. Data for 

1932 have a much wider degree of variability than either the 1989 or 2013 

data. Trend lines fitted to the data indicate that 1932 data showed larger 
MRG&P Report No. 

7 51

Figure 36. Mississippi River bed material gradations, 2013. 
MRG&P Report No. 

7 52

Figure 37. Mississippi River bed material gradations, 1989 (data from Nordin and Queen [1994]). 
MRG&P Report No. 

7 53

Figure 38. Mississippi River bed material gradations, 1932 (data from Nordin and Queen [1994]). 
MRG&P Report No. 7 54

particle sizes for D16 than either 1989 or 2013 data. The 2013 trend, in turn, 

shows slightly smaller particle sizes than in 1989. Trend lines for all three 

years have nearly the same slopes. The median, or D50, grain sizes for 2013, 

1989, and 1932 are compared in Figure 40. Like the D16 values, 1932 data 

have greater variability, but trend lines fitted to the 1932 data have a steeper 

negative slope than for 2013 or 1989 data. The 1932 trend shows larger D50

sizes near Cairo than either 2013 or 1989. This difference diminishes toward 

New Orleans with all three trend lines having nearly the same values at RM 

0 at Head of Passes. Trend lines for 2013 and 1989 are almost identical for 

D50. The D84 data for 2013, 1989, and 1932 are compared in Figure 41. There 

is wider variation for this size fraction for all three datasets. Trend lines 

fitted for D84 sizes exhibit similar relationships as observed for D50 except 

for two ways: the 1989 trend remains below the 1932 line for the entire 

reach, and the 2013 trend line crosses the 1932 line at approximately RM 

75, indicating that bed materials have coarsened in the lowest 75 miles of 

river.

Calculated mean particle diameters (Dm), averaged by 25-mile reaches, 

were plotted for the 2013 data and compared to those for the 1989 and 

1932 data as shown in Figure 42. There is no consistent trend exhibited for 

the three data sets with various reaches having different relationships 

among the three. For instance, 1932 values are largest between RM 850 

and RM 825 with 1989 next then 2013 while immediately downstream 

between RM 775 and RM 675, 1989 values are largest followed by 2013 

and then 1932. Of particular interest is the plot of Dm between RM 625 and 

RM 525 that shows distinct spikes in Dm values. Each data set has 

significantly larger Dm values in this reach. The reach between RM 625 

and RM 525 includes a number of major constructed cutoffs created in the 

1930s and 1940s. Downstream of RM 225, all three data sets have nearly 

the same value of Dm.

Sorting coefficient comparisons are shown in Figure 43 and Table 7; the 

general trends indicate more uniformity in 2013 than in earlier data.

The maximum particle sizes recorded in the thalweg (Figure 44) indicate 

that the trend of Dmax was larger in 2013 versus 1989. However, there were 

significantly more maximum size particles recorded in the 1989 sampling 

(N=298) than in 2013 (N=110) (Figure 45). Nonetheless, the cumulative 

distributions showed that only approximately 15% of the 1989 Dmax particles 

were greater than 30 mm compared to 45% for 2013. Accordingly, the 

averaged 1989 Dmax was approximately 20 mm compared to 35 mm for 

2013. 
MRG&P Report No. 

7 55

Figure 39. Variation in D16 grain size averaged by 25-mile reaches. “Expon.” indicates a logarithmic fit. 
MRG&P Report No. 

7 56

Figure 40. Variation in D50 grain size averaged by 25-mile reaches. “Expon.” indicates a logarithmic fit. 
MRG&P Report No. 

7 57

Figure 41. Variation in D84 grain size averaged by 25-mile reaches. “Expon.” indicates a logarithmic fit. 
MRG&P Report No. 

7 58

Figure 42. Comparison of mean grain diameters for the 2013, 1989, and 1932 samples averaged by 25-mile reaches. 
MRG&P Report No. 

7 59

Figure 43. Comparison of sorting coefficients for the 2013, 1989, and 1932 samples averaged by 25-mile reaches. Smaller 

values indicate well-sorted sediment. 
MRG&P Report No. 

7 60

Figure 44. Maximum grain size of Mississippi River thalweg samples (1989 and 2013). 
MRG&P Report No. 7 61

Table 7. Calculated statistics averaged from RM 950 to RM 0 for time period indicated. 

Calculated Statistic 

Year D84 (mm) D50 (mm) D16 (mm) Mean (mm) Sorting 

2013 0.92 0.40 0.25 0.74 1.93

1989 0.98 0.46 0.27 0.79 1.67

1932 2.25 0.96 0.44 1.67 2.40

Figure 45. Comparison of maximum particle size frequency distributions for 2013 and 1989 study 

periods. Maximum grain sizes measured along major axis. 

2013 Cross-channel data

In 2013 there was considerable interest in obtaining cross-channel 

variability in bed sediment composition. The interest stemmed from a 

need to have data that could be used for calibration of both onedimensional and multidimensional numerical models. Environmental 

investigations attempting to correlate aquatic diversity with substrate 

further highlighted a need for data to better understand lateral bed 

material variability. There were relatively few samples taken in 1989 to 

describe cross-channel variation in material gradation. The 1989 samples 

that were collected had only three cross-channel samples, which included 

thalweg samples. The 2013 dataset contains 233 cross-channel locations. 
MRG&P Report No. 7 62

Figure 46 shows the wide variations in D50 for all cross-channel samples 

(“A”–“E”) and includes thalweg (“T”) samples previously described in 

detail (recall that any cross-channel location may be a thalweg location 

[e.g., RM 204BT]). However, to compare results from thalweg locations to 

other cross-channel locations, samples in the thalweg were filtered out and 

recombined with “T” samples (Table 8). 

Figure 46. Cross-channel sample median grain sizes, Cairo, IL, to Head of Passes, LA, averaged along 

25-mile reaches. Samples labeled “A” indicate right descending bank and “E” left descending bank. “T” 

indicates thalweg samples. 
MRG&P Report No. 7 63

Table 8. Cross-channel (A–E) and thalweg (T) median grain sizes and compositions averaged between 

RM 950 and Head of Passes, LA. Refer to Figure 8 for cross-channel sampling scheme. Variability 

reported as 1 standard deviation. 

Transect 

Location A B C D E T 

D50 (mm) 0.35 ±0.22 0.43 ±0.22 0.37 ±0.15 0.45 ±0.47 1.30 ±4.16 0.40 ±0.22

% Clay 1.1±2.3 0.3±1.4 0.3±1.6 0.5±1.6 1.6±4.2 0.3±2.0

% Silt 9.6±21.1 2.1±9.0 2.1±11.1 4.8±14.8 9.3±22.7 1.3±8.0

% Sand 86.7±22.9 92.7±13.0 95.5±12.7 90.0±18.4 78.6±31.4 94.7±13.1

% Granule 1.0±2.6 1.5±3.1 0.7±1.1 1.4±2.7 2.2±4.3 5.5±7.4

When averaged across the LMR, “E” samples (left descending bank) had the 

largest D50 grain size and variability (±1 standard deviation) (1.3 ± 4.2 mm), 

while averages for “A–D” and thalweg samples were much smaller, on the 

order of 0.4 mm (Table 8). Samples along the banks (A, E samples) had 

relatively greater amounts of silt and lesser amounts of sand, although with 

considerable variability. Perhaps surprisingly, on average the thalweg 

contained greater quantities of granule material (> 2.00 mm) compared to 

other cross-channel samples. Since the thalweg location may vary within the 

channel (e.g., sample 952.6AT means the thalweg was along the right 

descending bank at RM 952.6), be aware that the results in Table 8 do not 

necessarily reflect differences between point bar sediments and riverbed 

sediments. Data for cross-channel samples are listed in Table A3 (LMR) and 

Table A4 (UMR).

Discussion of results

Three primary changes in the Mississippi River that influence bed 

sediments include constructed cut-offs, construction of a number of 

reservoirs on its tributaries, and construction of revetments and training 

structures. Nordin and Queen (1992) stated that their original hypothesis 

was that these factors would yield a coarser bed in 1989 than had been in 

1932. Their results found just the opposite with smaller mean and D50

sizes in 1989 than existed in 1932 above RM 300 and approximately the 

same below RM 300.

In 2013, the original hypothesis again projected that upstream reaches 

would produce coarser bed material than found in 1989 but probably not 

as coarse as in 1932. This theory was based on observations of extensive 

gravel bars between Cairo and Memphis and evidence of continued 

downward channel movement from hydrographic surveys and the revision 
MRG&P Report No. 7 64

of the LWRP in 2007. There are several locations where gravel deposits 

extend across the channel as evidenced by dredging operations in the 

channel thalweg. For example, dredging is routinely required at Island 8 

near RM 915 at a large gravel bar that lies across the navigation channel, 

evidenced by gravel observed in the dredge discharge removed from the 

channel thalweg. Other locations exhibit similar deposits. Results for 2013 

gravel materials again show a general decrease from 1989 results. 

However, between RM 700 to RM 475, the 2013 results showed a net 

increase in gravel percentages over 1989 levels. Downstream of RM 350 

results were approximately the same. The results between RM 700 to RM 

475 partly validated the theory postulated that the bed had coarsened 

within MVM. However, this was only true up to RM 700, and upstream of 

that the results did not follow expected trends.

Unlike sampling in 1932 and 1989, which showed no sustained periods of 

high flows in hydrographs prior to sampling, there was a major flood in 

2011 that likely resulted in major remixing of bed sediments (Figure B6). In 

fact, the 2011 flood resulted in activation of all three Mississippi River and 

Tributaries Project floodways setting new record high discharges at 

locations above Memphis and cresting near historic highs at Memphis and 

downstream. This significant event was capable of destroying armor layers 

and completely reworking sediment size distributions that may have existed 

prior to the flood. The depth and lateral extent of such mixing is unknown, 

and the sampling described herein was limited to the top 3 to 4 in. of the 

river bed at the time of sampling. A reasonable expectation from the likely 

reworking of the river bed is that samples from 2013 may be more uniform 

than would have existed prior to the 2011 flood. However, there is also a 

possibility that the maximum particle sizes may become larger as more 

gravel is exposed and mixed in the bed. This is supported by comparison of 

Dmax sizes between 2013 and 1989 samples. One extreme example of this is 

apparent from photos of large lignite material (approximately 1 m blocks) 

deposited on a gravel bar at RM 778 during the 2011 flood (Figure 47).
MRG&P Report No. 7 65

Figure 47. Large lignite material deposited on gravel bar at RM 778 by 2011 flood. 

Lignite conglomerates range in size up to 1 m or more. 

The response of the Mississippi River to anthropogenic influences such as 

cutoffs, reservoirs, and revetments is complex and has both short-term and 

long-term effects. While most short-term effects occurred soon after 

construction was complete, the long-term adjustment continues today some 

70+ years later. The complex nature of these adjustments is influenced by 

geologic controls located at various points along the Mississippi River. For 

example, clay outcrops extend across the river bed at locations where the 

river intersects bluffs along the eastern fringe of the floodplain. Fisk (1944, 

1947, 1949), Winkley (1977) and Elliot et al. (1991) discuss the influence of 

geologic controls suggesting their stabilizing influence on the channel 

profile. More recently, evidence of continued lowering of the low flow 

profile (USACE 2007) highlights that even with geologic influences, the 

river continues to adjust.

The data from the three sampling programs suggest that coarser material 

is migrating downstream over time. Data are insufficient to prove this 

observance, but alternating cycles of decreases and increases in particle 

distributions over the length of river can be seen in the results. It is 

recommended that additional sampling be done for one or two specific 

reaches consistently over a period of several years to better assess change 

over time. This would be similar to sampling reported by Robbins (1977). 
MRG&P Report No. 7 66

4 Summary and Conclusions

A total of 754 samples were collected during November 2013 between 

Grafton, IL, and Head of Passes, LA. Samples were collected using the 

same 4 in. pipe dredge and sampling techniques used by previous 

investigators in 1932 and again in 1989. There were no samples taken 

using alternate sampling equipment used in 1989. 

Particle size distributions of sands and coarser material were determined 

by standard sieve analysis. Particle size distributions of finer sediments 

were determined by LD with QC of randomly selected samples by pipet 

analysis. The basic data are given in Tables A1 to A10.

To summarize findings, the thalweg bed gradations downstream of Cairo, 

IL, to approximately RM 775 became slightly finer than in 1989 but were 

slightly coarser from RM 775 to the mouth of White River. Downstream of 

the White River, 2013 bed gradations were generally finer or nearly the 

same as found in 1989. The percentage of fine sand increased downstream 

of RM400 in 2013 over 1989 while the amount of very fine sand remained 

about the same.

Samples collected near the river banks generally had greater percentages of 

silt and lesser amounts of sand, although with considerable variability. In 

addition, on average the thalweg contained greater quantities of granule 

material (> 2.00 mm) compared to samples collected outside of the thalweg. 

Note that the results of this analysis take into account only samples from the 

thalweg within 3 to 4 in. of the bed surface; therefore, the large storage 

reservoirs within the bars, islands, and chutes remains uninvestigated. 

Furthermore, analyses to determine sediment movement or evaluation of

spatial distributions of sediment particle sizes were not included. Based 

upon the results, there are limited conjectures given regarding the movement of bed materials; however, the analysis of transect variations, 

sediment volumes and storage, and sediment transport are beyond the 

scope of this study. The data reported herein are intended to provide 

information to support additional and complementary research. Investigations into bed load sediment budget/balance, sediment transport modeling, 

and storage volumes for specific reaches have been identified as future 

MRG&P study needs.
MRG&P Report No. 7 67

The main conclusions of this investigation are as follows:

1. The 2013 samples were significantly finer relative to 1932. On average the 

D50 grain size in 2013 (0.40 mm) is approximately 50% less than that of 

1932 (0.96 mm), but little change in median grain size has occurred since 

1989 (0.46 mm). 

2. The 2013 samples were more uniform relative to 1932 and 1989, 

demonstrated by reductions in the sorting coefficient as listed in Table 7.

3. Since 1932, upstream of RM 500, there were marked declines in the 

percentage of gravel and very coarse sand, replaced by fine, medium, and 

coarse sand. In contrast, below RM 500, there were marked declines in the 

clay, silt, and very fine fractions, replaced by fine and medium sands. Thus, 

the river is relatively coarsening downstream and fining upstream. 

4. The 2013 samples contained less gravel than the 1932 and 1989 samples 

except between RM 650 to RM 575.

5. There is no significant time savings in terms of running samples using LD 

methods versus traditional sieve methods (approximately 10 min per 

sample); however, LD software offers significant time savings in terms of 

post processing data and is less prone to human error.

6. LD methods produce slightly different results from SP methods. LD results 

tend toward coarser particle sizes than yielded from SP analysis. Pipet 

analysis consistently overestimated particle sizes < 0.063 mm relative to 

LD.
MRG&P Report No. 7 68

References

American Society for Testing and Materials (ASTM). 2009. Standard test methods for 

particle-size distribution (gradation) of soils using sieve analysis. ASTM D6913-

04 (2009) e1. West Conshohocken, PA: ASTM International. www.astm.org

Biedenharn, D. S., W. A. Stroupe, and J. H. Brooks. 2014. A review of the lower 

Mississippi River potamology program. MRG&P Report No. 1. Vicksburg, MS:

U.S. Army Corps of Engineers Research and Development Center.

Blott, S. J., and K. Pye. 2006. Particle size distribution analysis of sand-sized particles by 

laser diffraction: And experimental investigation of instrument sensitivity and 

the effects of particle shape. Sedimentology 53:671–685. doi: 10.1111/j.1365-

3091.2006.00786.x

Bunte, K., and S. R. Abt. 2001. Sampling surface and subsurface particle-size 

distributions in wadable gravel and cobble bed streams for analyses in 

sediment transport, hydraulics, and streambed monitoring. USDA General 

Technical Report RMRS-GTR-74. Fort Collins, CO: U.S. Department of 

Agriculture, Forest Service, Rocky Mountain Research Station. 

Buurman, P., Th. Pape, J. A. Reijneveld, F. de Jong, and E. van Gelder. 2001. Laserdiffraction and Pipette-method grain sizing of Dutch sediments: Correlations for 

fine fractions of marine, fluvial, and loess samples. Netherlands Journal of 

Geosciences 80(2):49–57. 

Dardeau, E. A., Jr., and E. M. Causey. 1990. Downward trend in Mississippi River 

suspended sediment loads. Report 5. LMVD Potamology Program (P-1). 

Vicksburg, MS: U.S. Army Engineer Waterways Experiment Station. 

Dinis, P., and A. Castilho. 2012. Integrating sieving and laser data to obtain bulk grainsize distributions. Journal of Sedimentary Research 82:747–754. doi: 

10.2110/jsr.2012.62

Di Stefano, C., V. Ferro, and S. Mirabile. 2010. Comparison between grain-size analyses 

using laser diffraction and sedimentation methods. Biosystems Engineering

106:205–215.

Elliot, C. M., R. E. Rentschler, and J. H. Brooks. 1991. Response of the lower Mississippi 

River low-flow stages. In Proceedings of the 5th Federal Interagency 

Sedimentation Conference, Las Vegas, NV.

Eshel, G., G. J. Levy, U. Mingelgrin, and M. J. Singer. 2004. Critical evaluation of the use 

of laser diffraction for particle-size distribution analysis. Journal of Soil Science 

Society of America 68:736–743. 

Ferro, V., and S. Mirabile. 2009. Comparing particle size distribution analysis by 

sedimentation and laser diffraction method. Journal of Agricultural Engineering

2:35–43. 
MRG&P Report No. 7 69

Fisk, N. H. 1944. Geological investigation of the alluvial valley of the lower Mississippi.

Vicksburg, MS: Mississippi River Commission, U.S. Army Corps of Engineers. 

Fisk, N. H. 1947. Fine-grained alluvial deposits and their effects of Mississippi River 

Activity. Vicksburg, MS: Mississippi River Commission, U.S. Army Corps of 

Engineers. 

Fisk, N. H. 1949. Geological investigation of gravel deposits in the lower Mississippi 

Valley and adjacent uplands. Vicksburg, MS: Mississippi River Commission, 

U.S. Army Corps of Engineers. 

Folk, R. L. 1966. A review of grain size parameters. Sedimentology 6:73–93.

Keown, M. P., E. A. Dardeau, Jr., and J. G. Kennedy. 1977. Inventory of sediment sample 

collection stations in the Mississippi River Basin. Technical Report M-77-1. 

Vicksburg, MS: U.S. Army Engineer Waterways Experiment Station.

Keown, M. P., E. A. Dardeau, Jr., and E. M. Causey. 1981. Characterization of the 

suspended-sediment regime and bed-material gradation of the Mississippi 

River basin. Report 1, LMVD Potamology Program (P-1). Vicksburg, MS: U.S. 

Army Engineer Waterways Experiment Station.

Konert, M., and J. Vandenberghe. 1997. Comparison of laser grain size analysis with 

pipette and sieve analysis: A solution for the underestimation of the clay fraction. 

Sedimentology 44:523–525.

Mueller, D. S., and E. A. Dardeau, Jr. 1990. Impact of changes in suspended loads on the 

regime of alluvial rivers. Report 6. LMVD Potamology Program (P-1). Vicksburg, 

MS: U.S. Army Engineer Waterways Experiment Station.

Nordin, D. F., and B. S. Queen. 1992. Particle size distributions of bed sediments along 

the thalweg of the Mississippi River, Cairo, Illinois, to Head of Passes, 

September 1989. Report 7. Potamology Program (P-1). Vicksburg, MS: USACE, 

Lower Mississippi Valley Division.

Robbins, L. G. 1977. Suspended sediment and bed material studies on the lower 

Mississippi River: potamology investigations. Report 300-1. Vicksburg, MS: 

USACE , Lower Mississippi Valley Division.

Rodriguez, J. G., and A. Uriarte. 2009. Laser diffraction and dry-sieving grain size 

analyses undertaken on fine and medium-grained sand marine sediments: A 

note. Journal of Coastal Research 25(1):257–264.

Shreve, E. A., and A. C. Downs. 2005. Quality-assurance plan for the analysis of fluvial 

sediment by the U.S. Geological Survey Kentucky Water Science Center 

Sediment Laboratory. Open-File Report 2005-1230. Reston, VA: U.S. Geologic 

Survey.

Stevens, H. H., and D. W. Hubbell. 1986. Computer programs for computing particlesize statistics of fluvial sediments: U.S. Geological Survey Water Resources 

Investigations Report 86-4141. Reston, VA: U.S. Geological Survey.
MRG&P Report No. 7 70

Syvitski, J. P. M., K. W. Asprey, and D. A. Clattenburg. 1991. Principles, designs, and 

calibration of settling tubes. In Principles, methods, and applications of particle 

Size analysis, ed. J. P. M. Syvitski, 45–63. Cambridge, UK: Cambridge University 

Press. 

Waterways Experiment Station (WES). 1935. Studies of river bed materials and their 

movement, with special reference to the lower Mississippi River. Paper 17. 

Vicksburg, MS: U.S. Army Corps of Engineers, Waterways Experiment Station.

Winkley, B. R. 1977. A geomorphic study of the lower Mississippi River. Paper No. 2990. 

Fall Convention, American Society of Civil Engineers, N.Y.

U.S. Army Corps of Engineers (USACE). 2007. Low water reference plane update.

Internal report to Mississippi Valley Division, Memphis District. Memphis, TN: 

U.S. Army Corps of Engineers, Memphis District.
MRG&P Report No. 7 71

Appendix A: Data Tables

Table A1. Thalweg grain size distributions of material coarser than 0.063 mm for samples collected in the UMR 

(Grafton, IL, to Ohio River). 

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

* Indicates samples that were washed and dry sieved 

† Indicates samples analyzed by laser scattering only 

U204* 204.0 100.0 100.0 100.0 100.0 100.0 100.0 90.9 44.0 10.8 6.7 5.7

U199 199.0 100.0 100.0 81.1 71.7 67.5 63.9 59.0 34.3 7.0 1.5 0.3

U196CT 196.0 99.8 99.8 99.8 99.8 99.8 99.6 98.2 84.2 21.4 0.2 0.0

U195.5 

MOAT 195.5 100.0 100.0 100.0 100.0 99.5 99.3 98.9 79.7 3.6 0.0 0.0

U194BT 194.0 99.9 99.9 95.6 85.0 73.7 58.5 42.8 22.2 12.8 1.2 0.0

U192.5 192.5 100.0 100.0 99.3 95.7 91.2 85.9 77.4 53.7 28.8 3.5 0.0

U191 191.0 100.0 100.0 100.0 100.0 99.4 98.5 94.9 56.7 7.1 0.4 0.0

U190 190.0 100.0 100.0 89.9 88.8 87.1 84.5 75.3 36.9 3.0 0.0 0.0

U189 189.0 100.0 100.0 100.0 99.6 98.0 97.2 94.0 78.1 3.6 0.1 0.0

U188 188.0 100.0 100.0 100.0 99.6 99.3 98.9 96.3 60.2 4.3 0.0 0.0

U187 187.0 100.0 100.0 90.6 87.7 81.4 57.9 31.6 4.6 0.1 0.0 0.0

U186 186.0 100.0 100.0 94.0 92.2 90.0 84.8 65.7 10.6 0.3 0.0 0.0

U185 185.0 100.0 100.0 100.0 98.4 98.0 97.0 95.1 61.5 14.0 0.3 0.0

U184 184.0 100.0 100.0 100.0 99.2 96.5 91.5 82.1 55.6 2.1 0.1 0.0

U183.5 183.5 100.0 100.0 100.0 100.0 100.0 99.9 99.7 98.1 33.9 0.1 0.0

U183BT 183.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.9 68.8 0.2 0.0

U182 182.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.9 73.6 0.2 0.0

U180 180.0 100.0 100.0 100.0 100.0 99.9 96.3 82.7 48.2 28.8 0.8 0.0

U177.5 177.5 100.0 100.0 100.0 97.5 96.0 92.8 87.8 60.8 8.5 0.1 0.0

U175 175.0 100.0 100.0 100.0 96.9 94.9 91.9 85.0 51.0 4.1 0.0 0.0

U174DT 174.0 100.0 100.0 100.0 96.0 94.6 91.5 84.2 39.3 0.9 0.0 0.0

U170 170.0 100.0 100.0 100.0 97.4 95.6 89.9 73.2 15.4 0.8 0.0 0.0

U165 165.0 100.0 100.0 100.0 98.6 97.1 94.0 85.6 50.9 17.0 0.2 0.0

U160.5AT† 160.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 97.5 94.8 87.3

U160DT 160.0 100.0 100.0 100.0 96.6 94.4 89.3 81.3 57.4 9.5 0.0 0.0

U155 155.0 100.0 100.0 100.0 99.5 98.1 95.2 84.5 44.9 14.4 0.5 0.0

U150 150.0 100.0 100.0 100.0 90.2 82.2 70.4 49.0 11.6 3.9 0.3 0.0

U145 145.0 100.0 100.0 94.9 81.2 59.4 32.0 11.5 1.5 0.8 0.1 0.0
MRG&P Report No. 7 72

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U140 140.0 100.0 100.0 100.0 95.3 89.3 66.3 33.8 2.6 0.2 0.0 0.0

U135 135.0 100.0 100.0 100.0 97.7 84.6 63.3 35.9 6.5 1.1 0.1 0.0

U131AT 131.0 100.0 100.0 100.0 100.0 99.7 98.4 93.7 67.6 8.0 0.1 0.0

U125 125.0 100.0 100.0 100.0 98.7 97.1 94.1 85.7 50.3 5.2 0.2 0.0

U120 120.0 100.0 100.0 100.0 98.2 95.1 85.7 61.1 7.2 0.4 0.0 0.0

U117.5† 117.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 98.6 94.9

U117BT 117.0 100.0 100.0 96.7 83.3 70.3 57.2 42.3 6.8 0.6 0.0 0.0

U115 115.0 100.0 100.0 100.0 99.2 97.3 94.5 89.4 75.9 50.7 0.8 0.0

U110 110.0 100.0 100.0 100.0 99.5 98.9 97.6 93.7 61.5 4.4 0.0 0.0

U105 105.0 100.0 100.0 100.0 99.3 99.1 98.9 98.6 89.6 18.8 0.2 0.0

U100 100.0 100.0 100.0 96.2 95.7 94.9 92.4 84.4 49.6 3.6 0.0 0.0

U95 95.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.7 51.4 0.1 0.0

U90 90.0 100.0 100.0 100.0 98.1 95.6 91.1 84.6 57.1 17.5 0.0 0.0

U85 85.0 100.0 100.0 100.0 100.0 99.9 99.1 94.0 48.9 3.5 0.1 0.0

U79AT 79.0 99.9 99.9 99.9 99.9 98.1 95.2 89.7 50.2 8.0 0.2 0.0

U76† 76.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 98.2 96.4 89.0

U75 75.0 100.0 100.0 100.0 99.2 98.3 97.5 94.6 57.7 13.3 0.1 0.0

U70 70.0 100.0 100.0 82.1 79.1 76.7 75.5 73.7 54.0 10.1 0.3 0.0

U65 65.0 100.0 100.0 85.2 79.9 72.2 69.0 64.3 37.5 6.7 0.1 0.0

U60 60.0 100.0 100.0 100.0 99.5 97.8 95.9 91.3 56.0 1.2 0.0 0.0

U55 55.0 99.9 99.9 99.9 99.9 99.5 97.8 83.4 26.7 2.2 0.0 0.0

U50 50.0 100.0 100.0 100.0 96.9 94.1 85.8 57.9 10.4 0.3 0.0 0.0

U45 45.0 100.0 100.0 95.4 87.8 80.2 60.0 26.1 0.5 0.0 0.0 0.0

U40 40.0 100.0 100.0 100.0 100.0 99.7 98.9 94.9 78.7 5.0 0.0 0.0

U35 35.0 100.0 100.0 100.0 100.0 98.6 94.7 85.7 46.1 2.3 0.0 0.0

U30DT 30.0 100.0 100.0 83.0 76.2 67.3 58.0 49.4 36.6 4.1 0.0 0.0

U25 25.0 100.0 100.0 97.8 97.3 95.9 94.7 91.5 74.5 6.8 0.0 0.0

U20 20.0 100.0 100.0 93.9 84.7 66.6 36.5 5.5 1.0 0.1 0.0 0.0

U15 15.0 100.0 100.0 100.0 100.0 99.6 98.7 96.1 78.4 37.8 0.2 0.0

U10 10.0 100.0 100.0 100.0 99.7 98.6 96.4 90.6 75.5 20.1 0.3 0.0

U05 5.0 100.0 100.0 92.6 85.0 82.1 73.8 61.8 45.4 20.1 0.3 0.0

U1.5DT 1.5 100.0 100.0 100.0 100.0 100.0 99.8 99.2 96.8 7.7 0.2 0.0
MRG&P Report No. 7 73

Table A2. Thalweg grain size distributions of material coarser than 0.063 mm for samples collected in the LMR 

(Cairo, IL, to Head of Passes, LA). 

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

* Indicates samples that were washed and dry sieved 

† Indicates samples analyzed by laser scattering only 

958.8CT 958.8 100.0 100.0 86.9 57.6 36.8 30.7 27.2 21.4 9.4 3.3 0.6

955.7 955.7 100.0 100.0 92.6 50.5 20.7 9.0 4.3 1.6 1.1 0.8 0.3

952.6AT 952.6 100.0 100.0 100.0 98.6 93.0 87.8 83.2 63.2 31.4 22.7 17.3

951.4 951.4 100.0 100.0 100.0 99.0 97.5 91.2 73.6 15.6 1.1 0.0 0.0

949.2 949.2 100.0 100.0 100.0 100.0 99.5 98.2 91.6 35.7 0.6 0.0 0.0

947.3 947.3 100.0 100.0 100.0 100.0 99.7 98.9 96.4 54.6 2.0 0.0 0.0

945 945 100.0 100.0 100.0 100.0 98.7 97.0 94.3 81.2 14.7 0.0 0.0

942.8 942.8 100.0 100.0 100.0 98.9 97.8 95.5 87.4 38.2 2.8 0.0 0.0

941.2 941.2 100.0 100.0 98.6 96.3 95.1 93.4 84.2 28.5 3.4 0.1 0.0

938.8 938.8 100.0 100.0 100.0 99.4 99.0 98.1 95.5 82.7 33.3 0.4 0.0

937 937 100.0 100.0 100.0 100.0 99.1 96.2 90.5 54.2 9.4 0.8 0.0

935.2CT 935.2 100.0 100.0 100.0 98.7 95.2 88.7 71.4 11.8 0.1 0.0 0.0

933.0DT 933 100.0 100.0 92.2 90.3 89.5 86.6 77.2 22.3 0.2 0.0 0.0

931 931 100.0 100.0 96.2 96.2 95.5 95.3 94.9 89.6 6.5 0.0 0.0

929.1 929.1 100.0 100.0 100.0 99.7 97.6 92.8 89.4 65.6 3.7 0.0 0.0

927.9 927.9 100.0 100.0 100.0 98.7 96.1 93.1 88.5 68.0 25.2 0.1 0.0

926.7AT 926.7 100.0 100.0 95.8 93.3 87.7 76.3 57.0 16.7 2.1 0.0 0.0

924.5 924.5 100.0 100.0 100.0 98.3 95.9 92.3 84.5 38.3 2.8 0.0 0.0

923 923 100.0 100.0 100.0 99.1 98.6 97.2 92.9 70.4 21.1 0.2 0.0

919.1 919.1 100.0 100.0 100.0 98.2 95.6 91.7 82.5 50.2 6.4 0.0 0.0

917.1 917.1 100.0 100.0 91.6 84.8 80.0 75.8 64.5 36.1 19.1 0.5 0.0

916.8 916.8 100.0 100.0 100.0 100.0 99.4 98.8 97.0 80.6 18.1 0.3 0.0

915.4AT 915.4 100.0 100.0 96.4 92.5 76.6 53.4 27.8 2.5 0.4 0.0 0.0

913.5 913.5 100.0 100.0 100.0 100.0 98.6 95.7 84.3 41.1 2.6 0.0 0.0

911.9 911.9 100.0 100.0 100.0 100.0 98.8 98.1 95.6 84.8 13.6 0.1 0.0

909.8 909.8 100.0 100.0 100.0 99.7 99.5 99.0 97.8 69.8 19.4 0.3 0.0

908.1 908.1 100.0 100.0 93.0 91.4 88.7 87.6 84.8 51.3 8.7 0.1 0.0

905.9 905.9 100.0 100.0 100.0 98.4 93.6 86.7 74.0 42.2 9.1 0.3 0.0

904.6 904.6 100.0 100.0 100.0 90.7 85.3 74.1 58.2 16.4 0.5 0.0 0.0

902.3 902.3 100.0 100.0 100.0 100.0 99.2 98.0 94.9 50.2 2.6 0.0 0.0

901 901 100.0 100.0 100.0 100.0 98.9 96.4 83.0 21.4 0.6 0.0 0.0

898.9 898.9 100.0 100.0 100.0 100.0 99.0 98.0 92.2 29.4 0.3 0.0 0.0
MRG&P Report No. 7 74

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

897.9AT 897.9 100.0 100.0 100.0 95.2 86.7 68.7 37.4 3.9 0.2 0.0 0.0

896.7 896.7 99.9 99.9 99.9 98.5 94.5 90.5 81.8 35.5 3.5 0.2 0.0

894.8 894.8 100.0 100.0 100.0 100.0 99.8 99.0 94.7 52.1 4.8 0.2 0.0

893.5 893.5 100.0 100.0 100.0 100.0 99.6 99.1 98.1 74.6 1.9 0.0 0.0

891.8 891.8 100.0 100.0 100.0 98.6 97.5 96.4 90.6 35.7 1.4 0.0 0.0

890.5 890.5 100.0 100.0 100.0 100.0 100.0 99.9 99.7 80.0 5.8 0.0 0.0

888.3 888.3 100.0 100.0 100.0 98.4 95.0 87.8 63.4 7.9 0.2 0.0 0.0

886.4 886.4 100.0 100.0 100.0 99.4 98.4 96.0 90.1 57.3 2.0 0.0 0.0

884 884 100.0 100.0 100.0 85.6 78.9 69.3 52.9 9.9 1.9 0.0 0.0

882.2 882.2 99.8 99.8 99.8 99.8 99.8 99.8 99.4 89.2 1.6 0.0 0.0

879.8AT 879.8 100.0 100.0 100.0 97.2 96.9 96.2 94.5 73.6 5.2 0.0 0.0

878.1 878.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 80.3 0.2 0.0

877 877 100.0 100.0 100.0 99.0 97.3 92.4 80.9 43.7 22.6 0.1 0.0

875.7 875.7 100.0 100.0 100.0 98.3 96.2 91.0 69.8 21.0 11.1 0.0 0.0

873.7 873.7 100.0 100.0 100.0 100.0 100.0 99.5 95.8 71.6 3.1 0.0 0.0

871 871 100.0 100.0 100.0 100.0 99.4 96.8 88.3 53.9 8.7 0.1 0.0

870 870 100.0 100.0 100.0 99.2 98.8 98.1 93.1 41.6 5.6 0.0 0.0

867.3 867.3 100.0 100.0 100.0 100.0 100.0 100.0 99.8 97.4 13.4 0.1 0.0

865.7 865.7 100.0 100.0 100.0 99.1 97.7 92.9 71.6 12.4 0.7 0.0 0.0

864.5 864.5 100.0 100.0 100.0 100.0 99.3 98.2 95.7 77.8 16.4 0.1 0.0

862.7ET 862.7 100.0 100.0 100.0 100.0 100.0 99.7 98.7 75.9 8.9 0.1 0.0

860.4 860.4 100.0 100.0 100.0 100.0 98.7 94.1 84.1 39.5 7.3 0.0 0.0

858.6 858.6 100.0 100.0 100.0 100.0 99.6 99.6 99.2 85.5 26.0 0.3 0.0

857 857 100.0 100.0 100.0 99.4 98.3 95.0 80.7 49.1 7.0 0.1 0.0

856 856 100.0 100.0 100.0 100.0 99.2 98.4 80.3 14.7 5.2 0.1 0.0

855 855 100.0 100.0 100.0 100.0 99.6 98.7 85.6 13.8 3.4 0.1 0.0

853 853 100.0 100.0 100.0 100.0 98.2 95.2 90.2 55.8 1.6 0.0 0.0

851 851 100.0 100.0 100.0 98.4 96.4 93.5 78.8 45.0 6.2 0.0 0.0

849.4 849.4 100.0 100.0 100.0 100.0 98.9 97.7 90.1 16.5 0.5 0.0 0.0

848.2 848.2 100.0 100.0 98.2 93.7 91.2 82.9 60.0 50.1 49.1 49.0 0.0

846.5AT 846.5 100.0 100.0 100.0 100.0 99.7 99.4 81.8 40.5 5.6 0.0 0.0

844.6 844.6 100.0 100.0 100.0 98.9 98.2 97.3 89.3 49.6 1.2 0.0 0.0

842.5 842.5 100.0 100.0 100.0 100.0 99.9 99.5 95.3 35.5 1.1 0.0 0.0

840.1 840.1 100.0 100.0 100.0 98.4 96.4 93.5 78.9 23.9 1.2 0.0 0.0

835.5 835.5 100.0 100.0 100.0 95.2 90.8 81.8 64.5 22.2 0.3 0.0 0.0
MRG&P Report No. 7 75

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

833.6 833.6 100.0 100.0 100.0 100.0 99.6 98.1 95.2 55.0 4.4 0.0 0.0

831 831 99.6 99.6 99.6 99.6 98.8 97.5 94.9 64.2 8.6 0.1 0.0

828 828 100.0 100.0 100.0 97.9 97.2 95.4 88.0 45.7 2.9 0.0 0.0

825.4 825.4 100.0 100.0 100.0 99.5 98.9 98.0 89.4 15.2 1.4 0.0 0.0

822 822 100.0 100.0 100.0 100.0 99.7 99.5 98.9 85.9 16.9 0.2 0.0

818.4AT 818.4 100.0 100.0 86.4 80.1 68.2 52.6 33.0 12.0 0.6 0.0 0.0

816.2 816.2 100.0 100.0 96.5 95.0 94.3 90.8 71.5 3.5 0.5 0.0 0.0

814.8 814.8 100.0 100.0 100.0 100.0 100.0 99.7 99.1 40.5 0.7 0.0 0.0

813 813 100.0 100.0 100.0 100.0 100.0 99.9 98.2 72.3 13.0 0.1 0.0

810.6 810.6 100.0 100.0 100.0 100.0 100.0 99.9 99.6 91.5 11.0 0.1 0.0

807.9 807.9 100.0 100.0 100.0 99.1 95.1 87.3 57.2 4.6 0.5 0.0 0.0

804.5 804.5 100.0 100.0 100.0 99.7 99.3 98.8 96.4 55.9 3.4 0.0 0.0

802.1 802.1 100.0 100.0 100.0 100.0 99.9 99.6 99.4 95.6 13.0 0.0 0.0

799 799 100.0 100.0 100.0 100.0 98.8 97.7 93.7 43.9 5.1 0.0 0.0

797.5 797.5 100.0 100.0 100.0 100.0 99.9 99.8 99.1 73.5 4.2 0.0 0.0

795.5AT 795.5 100.0 100.0 100.0 99.5 99.5 99.0 96.9 44.5 1.9 0.0 0.0

792.5 792.5 100.0 100.0 100.0 99.5 98.1 96.9 94.8 54.3 5.7 0.0 0.0

789.5 789.5 100.0 100.0 100.0 99.5 98.4 97.4 95.6 59.0 4.5 0.0 0.0

788 788 100.0 100.0 100.0 100.0 98.8 97.3 91.9 46.6 2.5 0.0 0.0

786.2 786.2 100.0 100.0 100.0 99.8 98.7 95.4 83.7 11.8 1.8 0.0 0.0

783.4 783.4 100.0 100.0 100.0 100.0 99.0 96.2 74.6 5.0 0.8 0.0 0.0

780.2 780.2 100.0 100.0 100.0 100.0 99.9 99.7 99.1 90.3 11.4 0.1 0.0

778.2 778.2 100.0 100.0 100.0 100.0 99.2 98.8 97.0 68.3 10.4 0.1 0.0

777 777 99.9 99.9 99.9 99.9 99.5 98.7 93.5 71.4 11.8 0.2 0.0

775.2 775.2 100.0 100.0 100.0 100.0 99.5 99.1 94.7 55.5 5.3 0.1 0.0

773.4DT 773.4 100.0 100.0 94.5 90.3 85.5 76.3 52.0 7.5 0.1 0.0 0.0

771.9 771.9 100.0 100.0 100.0 100.0 96.3 90.4 76.0 17.4 0.1 0.0 0.0

770.3 770.3 100.0 100.0 100.0 100.0 98.9 96.0 83.0 25.6 0.8 0.0 0.0

768.8 768.8 100.0 100.0 100.0 100.0 99.8 99.7 99.6 97.8 8.9 0.0 0.0

766.8 766.8 100.0 100.0 100.0 100.0 99.7 99.1 96.0 51.9 3.2 0.0 0.0

764.8 764.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 97.5 22.8 0.1 0.0

762.2 762.2 100.0 100.0 100.0 100.0 99.0 97.4 92.1 63.3 15.9 0.6 0.0

760.1 760.1 100.0 100.0 100.0 98.8 97.6 95.7 88.9 36.4 2.1 0.0 0.0

757.8 757.8 100.0 100.0 100.0 100.0 99.8 99.4 96.5 66.8 7.3 0.0 0.0

755.7 755.7 100.0 100.0 100.0 99.4 99.1 98.6 96.8 59.5 2.1 0.0 0.0
MRG&P Report No. 7 76

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

754.3ET 754.3 100.0 100.0 100.0 100.0 99.7 99.4 95.5 45.4 1.7 0.0 0.0

752.7 752.7 100.0 100.0 100.0 100.0 99.6 98.4 94.0 66.1 4.9 0.0 0.0

750.2 750.2 100.0 100.0 96.7 92.1 88.8 86.9 81.9 37.4 7.0 0.1 0.0

746.5 746.5 100.0 100.0 100.0 99.4 98.1 95.2 83.9 23.3 0.5 0.0 0.0

744.7 744.7 100.0 100.0 100.0 100.0 99.1 97.9 92.5 32.5 0.3 0.0 0.0

742 742 100.0 100.0 100.0 95.0 93.7 91.2 82.3 35.4 0.8 0.0 0.0

740.6 740.6 100.0 100.0 97.1 94.6 91.7 88.2 79.1 37.0 0.8 0.0 0.0

737.4 737.4 100.0 100.0 100.0 99.1 98.9 98.0 91.0 29.4 1.1 0.0 0.0

734.6 734.6 100.0 100.0 100.0 100.0 99.7 98.6 93.4 62.3 28.5 0.2 0.0

732.7 732.7 100.0 100.0 100.0 100.0 100.0 99.9 98.5 62.3 3.3 0.1 0.0

730.3ET 730.3 100.0 100.0 100.0 100.0 100.0 100.0 99.3 55.0 10.4 0.1 0.0

727.7 727.7 100.0 100.0 100.0 100.0 99.9 98.6 96.2 90.4 26.5 0.3 0.0

725 725 100.0 100.0 100.0 99.2 98.4 97.4 90.4 40.5 1.8 0.0 0.0

722.3 722.3 100.0 100.0 100.0 99.8 97.1 90.2 70.9 32.8 2.4 0.0 0.0

719.5 719.5 100.0 100.0 100.0 100.0 100.0 100.0 99.3 66.0 3.6 0.0 0.0

716.8 716.8 100.0 100.0 100.0 100.0 99.8 99.6 98.9 46.3 2.7 0.0 0.0

714.3 714.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 63.0 0.3 0.0

712.9 712.9 100.0 100.0 100.0 100.0 99.0 97.4 95.4 90.7 49.4 0.3 0.0

709.9 709.9 100.0 100.0 100.0 100.0 99.5 99.2 98.6 91.4 8.8 0.2 0.0

707.2 707.2 100.0 100.0 100.0 100.0 99.5 98.9 93.0 34.6 3.3 0.0 0.0

705.0BT 705 100.0 100.0 95.6 94.4 93.1 90.7 87.3 1.4 1.4 0.0 0.0

702.9 702.9 99.9 99.9 94.0 89.3 85.3 80.5 70.6 52.4 30.4 1.5 0.0

700.3 700.3 100.0 100.0 100.0 96.3 92.6 86.3 77.0 34.8 7.2 3.9 2.4

697.5 697.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 86.7 5.7 0.0 0.0

695.6 695.6 100.0 100.0 100.0 99.5 99.2 97.8 92.5 3.6 3.5 0.0 0.0

694 694 100.0 100.0 97.2 96.8 94.9 90.5 72.0 15.2 0.6 0.0 0.0

692 692 100.0 100.0 99.9 99.9 98.7 96.7 89.5 47.8 7.2 0.2 0.0

689.9 689.9 100.0 100.0 100.0 100.0 99.9 99.9 99.9 85.3 6.4 0.1 0.0

687.6 687.6 100.0 100.0 100.0 100.0 100.0 99.9 99.2 68.4 2.7 0.0 0.0

683.4 683.4 100.0 100.0 100.0 98.3 98.3 98.0 97.1 63.7 4.3 0.0 0.0

681.7ET 681.7 100.0 100.0 100.0 100.0 98.2 95.6 87.9 64.7 1.8 0.0 0.0

679.4 679.4 100.0 100.0 100.0 99.9 99.9 99.7 99.0 85.3 52.3 0.4 0.0

677.5 677.5 100.0 100.0 100.0 100.0 98.4 95.8 81.8 33.9 2.7 0.0 0.0

674.5 674.5 100.0 100.0 100.0 100.0 99.6 99.2 96.7 48.5 3.0 0.0 0.0

672.1 672.1 100.0 100.0 100.0 100.0 99.2 97.7 90.9 35.0 2.9 0.0 0.0
MRG&P Report No. 7 77

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

669.9DT 669.9 100.0 100.0 100.0 98.5 98.0 97.5 94.2 32.3 2.7 0.0 0.0

666.8 666.8 100.0 100.0 100.0 94.0 93.4 93.0 92.1 70.3 7.9 0.1 0.0

664.9 664.9 100.0 100.0 100.0 100.0 100.0 100.0 99.7 91.2 3.6 0.0 0.0

663.9 663.9 100.0 100.0 100.0 100.0 99.9 99.6 97.8 85.3 15.4 0.1 0.0

662.4 662.4 100.0 100.0 100.0 100.0 99.5 97.5 89.0 49.0 6.9 0.0 0.0

660.2ET 660.2 100.0 100.0 100.0 98.3 97.6 94.7 83.6 40.3 1.6 0.0 0.0

658.1 658.1 100.0 100.0 100.0 100.0 99.9 99.9 98.0 52.0 0.6 0.0 0.0

656.5 656.5 100.0 100.0 100.0 100.0 99.1 96.0 82.0 33.9 1.1 0.0 0.0

654.6 654.6 100.0 100.0 100.0 99.7 96.6 93.9 85.9 49.9 4.2 0.0 0.0

653.0CT 653 100.0 100.0 100.0 99.6 99.5 99.1 96.2 69.6 5.9 0.0 0.0

650.2 650.2 100.0 100.0 100.0 99.9 99.4 97.1 92.7 37.5 0.4 0.0 0.0

647.6 647.6 100.0 100.0 100.0 98.2 96.3 93.5 78.7 11.6 1.3 0.0 0.0

645.7 645.7 100.0 100.0 100.0 100.0 100.0 99.7 98.6 81.5 14.0 0.1 0.0

643.4 643.4 100.0 100.0 100.0 96.7 90.8 81.1 46.5 1.8 0.2 0.0 0.0

641 641 99.9 99.9 99.9 99.9 98.2 96.7 89.0 65.5 10.8 0.5 0.0

640 640 100.0 100.0 100.0 96.9 95.4 92.1 82.0 41.6 2.4 0.0 0.0

637.2AT 637.2 100.0 100.0 100.0 95.9 95.7 95.0 93.4 82.7 6.7 0.0 0.0

634.1 634.1 100.0 100.0 100.0 99.5 99.1 98.7 96.7 70.3 6.2 0.0 0.0

632.1† 632.1 100.0 100.0 100.0 99.5 99.1 98.9 98.3 51.6 1.3 0.0 0.0

629.3 629.3 100.0 100.0 100.0 99.6 99.6 99.3 98.2 53.8 2.2 0.0 0.0

628 628 100.0 100.0 100.0 100.0 100.0 100.0 99.9 94.3 4.6 0.0 0.0

625.5 625.5 100.0 100.0 100.0 99.3 99.3 99.0 95.9 47.4 1.9 0.0 0.0

623.1 623.1 100.0 100.0 100.0 99.8 97.3 94.6 86.3 34.3 0.8 0.0 0.0

620.8 620.8 100.0 100.0 100.0 98.5 98.4 97.9 91.9 49.7 1.8 0.0 0.0

617.7 617.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 94.2 23.9 0.1 0.0

614.7 614.7 100.0 100.0 100.0 100.0 99.9 99.8 99.7 92.4 6.0 0.0 0.0

612.5AT 612.5 100.0 100.0 94.7 87.7 83.2 75.4 62.6 20.9 1.4 0.0 0.0

610 610 100.0 100.0 100.0 100.0 100.0 99.9 99.9 94.6 19.5 0.1 0.0

607.3 607.3 100.0 100.0 100.0 99.9 98.0 95.9 89.8 37.7 2.4 0.0 0.0

605.9 605.9 100.0 100.0 100.0 99.4 98.7 93.7 79.7 44.1 12.3 0.1 0.0

603.5 603.5 100.0 100.0 100.0 99.6 98.9 98.8 97.5 42.2 1.9 0.0 0.0

601 601 99.9 70.5 59.6 58.9 58.4 58.1 57.4 53.5 32.2 1.7 0.0

599.4 599.4 100.0 100.0 100.0 100.0 99.3 97.9 91.1 16.8 1.0 0.0 0.0

598.2ET† 598.2 100.0 100.0 100.0 100.0 100.0 99.8 98.8 74.4 32.8 4.2 0.0

595.6AT 595.6 100.0 100.0 100.0 99.5 98.3 97.4 94.6 42.1 1.5 0.3 0.0
MRG&P Report No. 7 78

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

592.1 592.1 100.0 100.0 100.0 100.0 99.5 99.1 97.7 77.1 19.4 0.0 0.0

590.3DT 590.3 100.0 100.0 100.0 97.7 96.3 94.4 89.5 39.9 2.2 0.0 0.0

588.5 588.5 100.0 100.0 100.0 99.5 99.5 99.3 98.3 82.5 19.9 0.1 0.0

585.2 585.2 100.0 100.0 100.0 99.5 99.4 98.8 97.9 85.8 16.9 0.1 0.0

583.8 583.8 100.0 100.0 100.0 100.0 99.3 99.3 99.3 93.9 3.3 0.0 0.0

581.3 581.3 100.0 100.0 100.0 100.0 99.9 99.9 99.9 97.8 41.7 0.2 0.0

579.4 579.4 100.0 100.0 100.0 99.5 98.2 96.9 94.0 76.3 1.7 0.0 0.0

576.5 576.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.4 53.4 0.6 0.0

575† 575 100.0 100.0 100.0 100.0 100.0 100.0 99.2 57.7 7.3 0.0 0.0

572.0AT 572 100.0 100.0 96.1 89.5 88.5 88.3 87.7 54.9 1.6 0.2 0.0

570 570 100.0 100.0 95.5 88.4 73.5 55.3 36.5 19.8 11.1 1.6 0.0

568.7ET† 568.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.4

566.0CT 566 100.0 100.0 100.0 100.0 99.9 99.8 99.6 96.2 14.7 0.3 0.0

565.2 565.2 99.9 99.9 99.9 99.9 99.9 99.4 99.0 96.1 31.7 1.2 0.0

562.8 562.8 100.0 100.0 100.0 94.7 93.6 92.5 89.7 44.2 2.9 0.1 0.0

561.3 561.3 100.0 100.0 100.0 100.0 99.7 99.6 99.5 96.9 21.1 0.3 0.0

559.8 559.8 100.0 100.0 97.6 93.2 91.3 89.7 86.9 70.4 1.0 0.0 0.0

556.8 556.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 91.6 21.6 0.4 0.0

554.1 554.1 99.9 99.9 99.9 99.9 97.0 95.0 93.3 80.8 17.7 2.1 0.0

551.8ET 551.8 99.7 99.7 99.7 99.7 99.0 98.6 97.8 80.3 1.3 0.3 0.0

548.8 548.8 98.3 98.3 95.7 93.8 91.1 89.6 85.8 54.4 11.1 3.9 0.0

546.8 546.8 99.7 99.7 97.8 95.9 94.9 93.7 91.9 71.1 4.5 1.1 0.0

545 545 100.0 100.0 100.0 99.0 98.9 98.8 98.5 40.0 0.9 0.1 0.0

542.9 542.9 100.0 100.0 100.0 100.0 99.7 99.6 98.9 64.8 3.1 0.1 0.0

541.5 541.5 100.0 100.0 97.0 96.6 96.5 96.2 95.5 73.5 5.9 0.0 0.0

538.2 538.2 100.0 100.0 100.0 99.5 99.4 98.8 97.7 86.5 5.4 0.1 0.0

535.4 535.4 100.0 100.0 95.4 95.1 94.3 93.9 92.6 71.2 1.4 0.0 0.0

532.9DT 532.9 100.0 100.0 100.0 100.0 99.9 99.9 99.7 95.9 14.3 0.1 0.0

531.3CT 531.3 100.0 100.0 100.0 100.0 99.5 99.2 96.9 85.8 32.4 0.3 0.0

527.4 527.4 100.0 100.0 97.1 96.1 93.5 91.7 87.1 60.5 1.6 0.0 0.0

525.3BT 525.3 100.0 100.0 100.0 94.2 89.5 82.3 68.4 28.3 0.7 0.0 0.0

522.5 522.5 100.0 100.0 100.0 100.0 100.0 99.9 99.5 85.9 12.4 0.1 0.0

519.1 519.1 100.0 100.0 100.0 100.0 99.8 99.3 98.6 91.5 15.4 0.1 0.0

518.1 518.1 100.0 100.0 100.0 100.0 97.4 95.3 92.0 75.1 10.4 0.1 0.0

516 516 100.0 100.0 100.0 98.0 95.6 94.2 92.3 74.6 10.5 0.1 0.0
MRG&P Report No. 7 79

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

514.1† 514.1 100.0 100.0 100.0 100.0 99.6 98.9 98.9 71.4 5.5 0.0 0.0

511.5 511.5 100.0 100.0 100.0 99.5 99.2 99.2 99.1 81.7 1.0 0.0 0.0

508.6† 508.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 89.9 7.7 0.0 0.0

507 507 100.0 100.0 100.0 95.1 92.8 91.7 90.4 64.7 4.2 0.0 0.0

504.5 504.5 100.0 100.0 100.0 96.9 95.6 94.5 91.4 62.7 5.1 0.0 0.0

502.4ET 502.4 100.0 100.0 100.0 100.0 99.9 99.9 99.8 94.7 1.3 0.0 0.0

497.3 497.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 90.0 14.5 0.2 0.0

495.1 495.1 100.0 100.0 100.0 100.0 99.8 99.8 99.6 91.4 5.6 0.0 0.0

491.8 491.8 100.0 100.0 100.0 99.6 98.7 98.1 97.1 72.6 3.5 0.0 0.0

490 490 100.0 100.0 100.0 100.0 99.8 99.5 99.2 95.4 16.8 0.1 0.0

488.2 488.2 100.0 100.0 100.0 98.4 95.6 91.3 85.1 56.0 3.6 0.0 0.0

485.5 485.5 100.0 100.0 98.5 97.0 96.6 96.0 95.5 91.1 30.1 0.1 0.0

482.8 482.8 100.0 100.0 100.0 100.0 99.3 97.4 90.3 57.5 4.1 0.0 0.0

480.6 480.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.6 35.5 0.1 0.0

478.6 478.6 100.0 100.0 100.0 100.0 100.0 99.9 99.9 96.7 30.9 0.5 0.0

476.6CT 476.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.5 19.8 0.1 0.0

469.6 469.6 100.0 100.0 100.0 99.1 97.7 96.9 95.9 80.6 6.3 0.0 0.0

468.8 468.8 100.0 100.0 100.0 100.0 99.9 99.8 99.6 92.8 14.6 0.1 0.0

466.7 466.7 100.0 100.0 100.0 100.0 100.0 99.9 99.7 96.4 35.9 0.6 0.0

465.2 465.2 100.0 100.0 100.0 100.0 100.0 99.9 99.5 83.5 54.6 0.3 0.0

462 462 100.0 100.0 100.0 100.0 100.0 100.0 99.8 93.5 9.7 0.1 0.0

460.8 460.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.6 10.3 0.1 0.0

458.6 458.6 100.0 100.0 100.0 100.0 99.8 99.8 99.7 93.1 26.2 0.1 0.0

456.8 456.8 100.0 100.0 100.0 90.9 83.3 80.3 78.3 69.8 13.8 0.6 0.0

454.8 454.8 100.0 100.0 100.0 98.8 97.9 95.9 92.1 64.9 3.7 0.1 0.0

452.4DT 452.4 100.0 100.0 100.0 100.0 99.3 98.0 95.3 75.6 6.7 0.1 0.0

449.2 449.2 100.0 100.0 100.0 100.0 99.7 99.6 99.0 78.5 3.7 0.0 0.0

446.8 446.8 100.0 100.0 100.0 100.0 99.8 99.7 99.0 90.9 12.5 0.1 0.0

445.2 445.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 72.5 1.2 0.0

442.8 442.8 100.0 100.0 100.0 99.5 99.2 99.1 99.1 86.3 15.3 0.2 0.0

439.8 439.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.6 5.9 0.0 0.0

434.9 434.9 100.0 100.0 100.0 98.5 91.4 79.5 62.1 35.6 6.7 0.0 0.0

433.8BT 433.8 100.0 100.0 100.0 100.0 99.5 99.2 97.6 65.0 2.3 0.0 0.0

432 432 100.0 100.0 100.0 100.0 99.7 99.6 99.0 87.1 2.7 0.0 0.0

429.3 429.3 100.0 100.0 100.0 100.0 99.9 99.9 99.8 97.4 13.7 0.1 0.0
MRG&P Report No. 7 80

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

427.5ET 427.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 45.1 0.3 0.0

425.6 425.6 100.0 100.0 100.0 100.0 100.0 99.8 98.3 78.6 19.2 0.1 0.0

424 424 100.0 100.0 100.0 100.0 98.3 95.5 89.1 67.2 7.7 0.0 0.0

422.3 422.3 100.0 100.0 89.1 86.3 84.9 81.5 75.7 52.3 2.5 0.0 0.0

420.1 420.1 100.0 100.0 100.0 100.0 99.7 99.7 99.2 96.6 35.0 0.3 0.0

418.3 418.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 94.1 15.7 0.1 0.0

415 415 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.8 38.2 0.2 0.0

413.3 413.3 100.0 100.0 100.0 100.0 100.0 99.9 99.9 95.3 12.2 0.1 0.0

411.5 411.5 100.0 100.0 100.0 100.0 99.3 98.8 97.7 77.4 8.4 0.0 0.0

409.5 409.5 100.0 100.0 100.0 100.0 100.0 99.7 99.1 93.8 25.8 0.2 0.0

408.7AT 408.7 100.0 100.0 100.0 100.0 99.9 99.8 99.8 97.7 35.5 0.1 0.0

404.9 404.9 100.0 100.0 100.0 97.1 96.6 95.4 92.3 57.0 2.5 0.0 0.0

402.3† 402.3 100.0 100.0 100.0 97.7 96.1 94.6 91.1 40.8 0.6 0.0 0.0

399.4 399.4 100.0 100.0 100.0 100.0 100.0 99.9 99.8 98.4 31.5 0.3 0.0

397.9 397.9 100.0 100.0 96.4 94.9 94.9 94.7 94.5 91.7 18.1 0.1 0.0

393.8 393.8 100.0 100.0 100.0 100.0 99.7 99.7 99.6 93.2 22.1 0.1 0.0

391 391 100.0 100.0 100.0 100.0 99.9 99.7 99.4 92.3 13.2 0.1 0.0

389.8 389.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.5 43.1 0.2 0.0

387 387 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.0 9.7 0.0 0.0

385 385 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.1 30.2 0.2 0.0

382.2CT 382.2 100.0 100.0 100.0 100.0 100.0 99.9 99.8 99.6 37.3 0.1 0.0

380 380 100.0 100.0 100.0 99.0 96.7 95.1 92.9 71.0 3.0 0.0 0.0

378.1 378.1 100.0 100.0 100.0 100.0 99.8 99.8 99.4 90.3 6.7 0.0 0.0

375.5 375.5 100.0 100.0 100.0 99.4 98.9 98.3 97.5 83.2 17.8 0.3 0.0

371.2 371.2 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.4 45.4 0.6 0.0

367.7 367.7 100.0 100.0 100.0 100.0 99.6 99.2 98.6 84.9 19.6 0.1 0.0

364.8 364.8 100.0 100.0 100.0 100.0 100.0 99.9 99.9 94.9 24.6 0.6 0.0

362.4AT 362.4 100.0 100.0 100.0 99.7 99.2 99.0 98.9 92.2 10.3 0.1 0.0

359.3 359.3 100.0 100.0 100.0 96.8 95.6 95.1 94.2 51.2 3.2 0.0 0.0

357 357 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.8 21.4 0.1 0.0

355.0ET 355 100.0 100.0 95.7 94.2 92.4 90.3 86.5 73.4 42.0 0.1 0.0

353.7 353.7 100.0 100.0 100.0 100.0 99.7 99.5 99.3 93.3 21.8 0.2 0.0

351.3 351.3 100.0 100.0 100.0 94.9 93.7 92.7 91.8 52.7 0.3 0.0 0.0

346.1 346.1 100.0 100.0 100.0 100.0 99.6 99.6 99.4 93.3 11.6 0.1 0.0

343.7 343.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.6 41.0 0.4 0.0
MRG&P Report No. 7 81

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

341.3 341.3 100.0 100.0 88.1 78.6 73.5 67.5 61.2 48.1 7.5 0.1 0.0

340 340 100.0 100.0 100.0 98.8 97.8 97.5 97.0 72.1 3.5 0.0 0.0

338 338 100.0 100.0 100.0 100.0 99.6 99.6 99.2 92.1 14.9 0.1 0.0

334.4 334.4 100.0 100.0 100.0 99.6 98.9 98.5 97.8 84.4 14.1 0.0 0.0

332.2AT 332.2 100.0 100.0 100.0 99.8 97.8 97.4 96.9 85.5 10.8 0.1 0.0

330.4 330.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.5 44.2 0.1 0.0

328.3 328.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 62.9 0.2 0.0

325.8 325.8 99.9 99.9 99.9 99.9 99.8 99.7 99.6 99.6 89.0 0.9 0.0

323.9 323.9 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.7 31.8 0.1 0.0

322.6 322.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.5 58.6 0.1 0.0

321.1 321.1 100.0 100.0 100.0 100.0 99.8 98.8 96.9 69.9 14.0 0.1 0.0

316 316 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 30.0 0.3 0.0

314.5 314.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.6 31.4 0.3 0.0

312.8ET 312.8 100.0 100.0 100.0 100.0 99.9 99.8 99.7 94.4 21.0 0.1 0.0

311.4 311.4 100.0 100.0 100.0 100.0 99.9 99.9 99.9 96.4 24.4 0.4 0.0

309.8 309.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.9 54.1 0.5 0.0

308.5 308.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.5 16.0 0.1 0.0

306.3 306.3 100.0 100.0 100.0 100.0 99.8 99.8 99.7 97.6 22.6 0.1 0.0

304.2 304.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 42.5 0.5 0.0

303.1 303.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 67.3 0.5 0.0

299.7 299.7 100.0 100.0 100.0 100.0 100.0 99.9 99.9 98.4 12.9 0.1 0.0

297.5 297.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 78.7 0.2 0.0

294.2 294.2 100.0 100.0 100.0 100.0 100.0 99.8 99.3 91.3 9.7 0.1 0.0

292.9AT 292.9 99.9 99.9 99.9 99.9 99.9 99.7 99.4 97.9 65.0 0.5 0.0

289.8 289.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 92.7 29.9 0.3 0.0

288.6 288.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 92.1 25.9 0.2 0.0

285.4 285.4 100.0 100.0 100.0 100.0 100.0 99.8 99.6 97.2 62.1 0.4 0.0

283.3 283.3 100.0 100.0 100.0 100.0 99.3 99.2 98.4 82.4 20.0 0.5 0.0

282 282 100.0 100.0 100.0 100.0 100.0 99.9 99.8 87.0 25.3 0.5 0.0

279.7 279.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.0 22.8 0.3 0.0

277.2 277.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 95.6 7.6 0.1 0.0

275.5 275.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 94.9 15.9 0.1 0.0

272.2 272.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 87.6 0.5 0.0

269.5DT 269.5 99.9 99.9 99.9 99.9 99.9 99.7 99.1 64.9 14.4 0.5 0.0

268.4 268.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.7 52.8 0.8 0.0
MRG&P Report No. 7 82

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

265.3 265.3 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.7 55.4 0.3 0.0

263 263 100.0 100.0 100.0 100.0 100.0 99.8 99.3 87.9 27.2 0.3 0.0

260.9 260.9 100.0 100.0 100.0 99.9 99.6 99.6 99.5 99.1 93.0 9.2 4.7

258.8 258.8 99.8 99.8 99.8 99.2 98.1 96.5 94.1 75.9 13.4 0.2 0.0

257.6 257.6 99.9 99.9 99.9 99.9 99.9 99.9 99.9 97.6 57.2 0.8 0.0

254.9 254.9 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.7 81.3 0.6 0.0

253 253 99.9 99.9 99.9 99.9 99.9 99.9 99.9 88.6 17.9 0.2 0.0

251 251 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.1 27.6 0.1 0.0

249.0DT 249 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 55.3 0.3 0.0

247.5 247.5 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.9 27.0 0.1 0.0

246 246 99.9 99.9 99.9 99.9 99.8 99.8 99.8 99.4 93.7 1.7 0.0

244.8 244.8 99.9 99.9 99.9 99.9 99.6 99.2 99.1 98.0 69.9 1.4 0.0

242.4 242.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 98.2 31.3 0.3 0.0

240.3 240.3 98.9 98.9 98.9 98.9 98.9 98.8 98.8 98.8 93.1 10.0 0.0

238.1 238.1 100.0 100.0 100.0 100.0 100.0 99.9 99.9 98.9 5.4 0.1 0.0

235 235 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 64.6 60.8

227.8 227.8 100.0 100.0 100.0 100.0 99.8 99.0 97.6 82.1 16.2 0.1 0.0

226.6 226.6 100.0 100.0 100.0 100.0 100.0 99.3 98.2 79.0 11.5 0.1 0.0

224.2 224.2 100.0 100.0 100.0 100.0 99.9 99.6 99.0 91.2 20.2 0.1 0.0

221.3DT 221.3 99.8 99.8 99.8 99.8 99.8 99.7 99.7 97.7 77.4 1.5 0.0

220 220 99.9 99.9 99.9 99.9 99.9 99.9 99.9 98.1 33.0 0.3 0.0

217.3 217.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9 98.6 42.2 0.5 0.0

215.6 215.6 99.9 99.9 99.9 99.9 99.9 99.9 99.9 98.8 55.8 0.5 0.0

213.3 213.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 66.6 0.2 0.0

211.4 211.4 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 95.2 1.7 0.0

209 209 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.8 86.8 1.0 0.0

206.2 206.2 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.7 30.6 0.4 0.0

204.8 204.8 99.9 99.9 99.9 99.9 99.6 99.5 99.4 99.4 67.3 0.5 0.0

202.1 202.1 99.9 99.9 99.9 99.9 99.9 99.8 99.7 97.8 46.5 0.8 0.0

200.7AT 200.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.8 74.1 1.2 0.0

198.2 198.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.4 61.0 0.6 0.0

196.2 196.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 59.1 0.6 0.0

193.5 193.5 99.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 83.7 1.8 0.0

191.4 191.4 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.8 63.7 1.4 0.0

189.4 189.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 85.9 1.8 0.0
MRG&P Report No. 7 83

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

186.8 186.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 94.7 25.4 0.5 0.0

184.8 184.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 95.5 70.1 1.5 0.0

181.5 181.5 100.0 100.0 100.0 100.0 100.0 99.8 99.6 91.9 32.3 0.6 0.0

179.2 179.2 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.3 55.9 1.7 0.0

177.0ET 177 99.3 99.3 99.3 99.3 99.3 99.1 98.9 95.1 7.9 0.4 0.0

173.7 173.7 100.0 100.0 100.0 96.3 94.5 94.0 93.9 92.9 33.8 0.8 0.0

172 172 99.7 99.7 99.7 99.7 99.7 99.7 99.7 99.5 65.1 1.5 0.0

170.6 170.6 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.6 59.7 0.9 0.0

168.5 168.5 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.5 19.2 0.1 0.0

164.8 164.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 86.8 1.8 0.0

162.2 162.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.2 89.0 8.3 4.3

160.2 160.2 99.9 99.9 99.9 99.9 99.9 99.9 99.8 99.8 61.1 0.5 0.0

157.7 157.7 99.9 99.9 99.9 99.8 99.6 99.4 98.6 96.2 52.6 0.5 0.0

156.4 156.4 100.0 100.0 100.0 100.0 100.0 100.0 99.8 99.1 82.8 1.0 0.0

152.9CT 152.9 99.9 99.9 99.9 99.9 99.9 99.8 99.8 99.2 71.0 0.8 0.0

150 150 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.8 60.9 1.6 0.0

147.3 147.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.7 59.2 0.5 0.0

144.3 144.3 99.9 99.9 99.9 99.9 99.9 99.9 99.8 99.5 80.5 1.7 0.0

142.4* 142.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 97.0 24.1 18.3

140.3 140.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 94.2 1.0 0.0

136.6 136.6 100.0 100.0 100.0 100.0 99.9 99.9 99.7 94.1 39.2 0.7 0.0

133.6 133.6 98.7 98.7 98.7 98.7 98.7 98.5 98.4 97.9 90.1 2.6 0.0

132 132 99.9 99.9 99.9 99.9 99.9 99.9 99.9 97.6 60.0 0.3 0.0

127.5 127.5 99.8 99.8 99.8 99.8 99.7 99.6 99.6 99.5 89.8 1.8 0.0

125.7 125.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 87.4 4.4 2.4

123.0CT* 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 96.7 22.5 10.0

116.7 116.7 99.8 99.8 99.8 99.8 99.8 99.8 99.7 99.6 89.6 1.4 0.0

114.1 114.1 99.9 99.9 99.9 99.7 99.7 99.7 99.7 99.7 96.8 1.9 0.0

110 110 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.8 80.9 1.0 0.0

107.5 107.5 99.5 99.5 99.5 99.5 99.5 99.5 99.4 99.3 86.9 2.2 0.0

104.5 104.5 99.1 99.1 99.1 99.1 99.1 99.1 98.7 97.9 94.2 2.5 0.0

103 103 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 68.6 1.1 0.0

96.4 96.4 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 66.5 0.7 0.0

91.5* 91.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.4 18.4 14.4

89.9DT 89.9 99.8 99.8 99.8 99.6 99.6 99.6 99.5 99.5 92.4 3.5 0.0
MRG&P Report No. 7 84

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

86* 86 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 52.4 46.1

82.7 82.7 99.4 99.4 99.4 99.4 99.4 99.4 99.4 99.3 88.6 2.5 0.0

81.5 81.5 99.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 68.7 2.2 0.0

78 78 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 94.4 8.8 4.5

75.2 75.2 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.2 96.4 3.2 0.0

73.1 73.1 99.9 99.9 99.9 99.9 99.9 99.8 99.8 98.0 66.7 1.1 0.0

65.8 65.8 99.9 99.9 99.9 99.9 99.9 99.9 99.7 99.7 98.2 3.8 0.0

63 63 99.8 99.8 99.8 99.8 99.8 99.8 99.8 81.8 70.7 4.0 0.0

59 59 99.0 99.0 99.0 99.0 99.0 98.9 98.7 98.0 84.8 3.0 0.0

57.0DT 57 99.8 99.8 99.8 99.8 99.8 99.6 99.5 99.4 75.9 2.0 0.0

55.4 55.4 99.9 99.9 99.9 99.8 99.7 99.5 99.5 98.0 27.2 0.7 0.0

52.8 52.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 99.8 98.1 3.7 0.0

51.2 51.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.1 14.0 0.3

47.3 47.3 99.9 99.9 99.9 99.8 98.9 98.0 97.5 96.8 73.7 1.8 0.0

44.8 44.8 99.7 99.7 99.7 99.7 99.7 99.7 99.4 99.3 73.5 2.5 0.0

42.8* 42.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.1 52.3 47.4

40* 40 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 73.9 9.5 7.4

37 37 99.4 99.4 99.4 99.4 99.4 99.4 99.4 99.4 71.3 1.9 0.0

35.2 35.2 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 97.0 3.4 0.0

33.0BT† 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 91.1 80.2 77.2

30.4 30.4 98.6 98.6 98.6 98.6 98.6 98.6 98.6 98.5 96.4 5.6 0.0

26 26 99.8 99.8 99.8 99.8 99.8 99.7 99.7 99.7 96.5 2.9 0.0

23.9 23.9 99.6 99.6 99.6 99.6 99.6 99.6 99.6 99.5 98.9 8.6 0.0

21.9* 21.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.0 11.8 7.1

18* 18 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.2 84.9 84.4

13.5* 13.5 100.0 100.0 100.0 100.0 100.0 100.0 99.7 99.7 99.4 57.6 53.0

11.9* 11.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 61.5 58.1

5.5† 5.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 82.7 17.0 0.0 0.0

2.8CT* 2.8 100.0 100.0 100.0 100.0 100.0 100.0 99.7 99.3 98.9 90.7 84.5

 
MRG&P Report No. 7 85

Table A3. Cross-channel sample grain size distributions of material coarser than 0.063 mm for samples collected 

in the UMR (Grafton, IL, to Cairo, IL). 

Sample 

Name 

River Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

* Indicates samples that were washed and dry sieved

† Indicates samples analyzed by laser scattering only

U196D 196 99.6 99.6 99.6 99.6 99.6 99.5 98.5 79.3 20.2 0.5 0.0

U196B 196 100.0 100.0 100.0 100.0 99.3 98.2 92.9 50.4 2.0 0.0 0.0

U196A* 196 99.9 99.9 98.2 94.1 85.8 66.1 35.5 8.2 1.7 0.2 0.0

U195.5 

MOE 195.5 99.6 99.6 99.6 99.6 97.3 93.3 82.9 57.7 11.2 0.6 0.0

U195.5 

MOD 195.5 100.0 100.0 100.0 100.0 99.7 98.1 94.5 80.7 32.9 5.0 0.9

U195.5 

MOC 195.5 100.0 100.0 98.8 88.1 77.5 67.8 59.7 43.6 9.8 0.8 0.0

U195.5 

MOB 195.5 100.0 100.0 100.0 100.0 99.1 94.5 83.7 48.9 10.8 0.1 0.0

U194E 194 99.7 99.7 99.7 99.7 99.6 99.6 99.3 96.5 74.4 12.1 0.0

U194D 194 100.0 100.0 100.0 100.0 100.0 99.8 98.9 95.4 84.9 5.8 0.0

U194C 194 100.0 100.0 100.0 99.4 93.4 84.1 67.8 20.5 5.2 0.3 0.0

U194A 194 100.0 100.0 100.0 100.0 100.0 100.0 98.0 81.5 77.1 65.2 55.4

U183E 183 100.0 100.0 100.0 99.3 95.8 83.5 63.4 40.1 10.7 0.0 0.0

U183D 183 100.0 100.0 100.0 100.0 100.0 99.6 98.9 97.8 37.0 0.0 0.0

U183C 183 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.7 75.4 0.0 0.0

U183A 183 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.1 69.3 0.2 0.0

U174E 174 100.0 100.0 100.0 100.0 98.1 96.5 90.3 54.8 20.6 0.1 0.0

U174C 174 100.0 100.0 100.0 99.5 98.7 97.7 94.9 68.3 2.1 0.0 0.0

U174B 174 100.0 100.0 100.0 99.7 99.7 99.1 97.0 78.3 5.0 0.0 0.0

U174A 174 99.9 99.9 99.9 99.2 98.2 94.8 84.5 53.9 5.9 0.1 0.0

U160E 160 100.0 100.0 100.0 100.0 99.2 97.9 90.6 37.6 1.2 0.0 0.0

U160C 160 100.0 100.0 100.0 100.0 98.7 95.2 81.4 33.2 3.0 0.0 0.0

U160B 160 100.0 100.0 100.0 99.3 94.3 81.8 63.9 24.0 1.0 0.0 0.0

U131E 131 100.0 100.0 100.0 96.3 91.7 81.0 58.3 7.8 0.2 0.0 0.0

U131D 131 99.9 99.9 99.9 96.6 94.7 88.8 69.8 14.2 0.2 0.1 0.0

U131C 131 100.0 100.0 100.0 96.5 94.6 93.2 91.3 74.0 5.0 0.1 0.0

U131B 131 100.0 100.0 100.0 100.0 99.9 99.9 99.7 90.4 6.3 0.0 0.0

U117E 117 100.0 100.0 100.0 100.0 96.6 81.1 45.4 1.6 0.1 0.0 0.0

U117D 117 100.0 100.0 100.0 100.0 98.9 94.2 76.6 10.2 0.1 0.0 0.0

U117C 117 100.0 100.0 100.0 100.0 100.0 99.5 96.8 53.4 4.6 0.1 0.0

U117A 117 100.0 100.0 100.0 100.0 99.6 99.1 98.2 88.0 18.3 0.3 0.0

U79E 79 99.8 99.8 99.8 99.8 99.6 98.6 93.9 47.6 2.8 0.0 0.0
MRG&P Report No. 7 86

Sample 

Name 

River Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U79D 79 100.0 100.0 100.0 100.0 100.0 99.4 96.4 54.0 11.8 0.9 0.2

U79C 79 100.0 100.0 86.7 70.9 63.5 57.4 51.2 33.2 22.5 0.1 0.0

U79B 79 100.0 100.0 100.0 100.0 99.1 97.9 88.7 26.1 0.6 0.0 0.0

U30E 30 100.0 100.0 100.0 100.0 100.0 99.9 99.8 45.7 0.8 0.0 0.0

U30C 30 100.0 100.0 100.0 100.0 98.9 97.3 93.2 68.8 7.4 0.0 0.0

U30B 30 100.0 100.0 100.0 100.0 98.8 96.6 90.5 62.2 7.1 0.0 0.0

U30A 30 99.8 84.2 81.8 79.6 76.9 73.4 68.7 53.4 8.5 0.2 0.0

U1.5C 1.5 100.0 100.0 100.0 100.0 99.6 99.3 98.1 89.4 7.9 0.0 0.0

U1.5B 1.5 100.0 100.0 100.0 100.0 100.0 99.7 99.0 96.1 23.6 0.1 0.0

U1.5A 1.5 99.9 99.9 99.9 97.7 94.0 88.3 66.9 18.1 9.2 2.0 0.0

958.8B 958.8 100.0 100.0 100.0 99.1 93.7 78.8 49.2 13.8 0.6 0.0 0.0

958.8A 958.8 100.0 100.0 100.0 100.0 99.8 98.4 93.7 71.0 2.7 0.6 0.0

Table A4. Cross-channel sample grain size distributions of material coarser than 0.063 mm 

for samples collected in the LMR (Cairo, IL, to Head of Passes, LA). 

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

* Indicates samples that were washed and dry sieved 

† Indicates samples analyzed by laser scattering only 

952.6B 952.6 100.0 100.0 100.0 92.9 90.2 83.6 69.8 32.3 3.4 0.0 0.0

952.6C 952.6 100.0 100.0 100.0 100.0 99.5 98.8 96.4 84.2 36.8 0.3 0.0

952.6D 952.6 100.0 100.0 100.0 100.0 99.6 98.1 91.5 51.5 5.5 0.1 0.0

952.6E 952.6 100.0 100.0 100.0 100.0 98.7 96.0 86.9 45.9 2.5 0.1 0.0

935.2A 935.2 100.0 100.0 100.0 98.8 98.1 96.9 91.3 45.5 0.6 0.0 0.0

935.2B 935.2 100.0 100.0 72.3 68.5 66.5 65.3 60.4 27.3 0.9 0.1 0.0

933.0A 933 100.0 100.0 96.1 95.4 93.4 90.5 85.4 72.8 7.0 0.0 0.0

933.0B 933 100.0 91.3 82.4 77.4 75.0 72.0 64.7 40.3 0.6 0.0 0.0

933.0C 933 100.0 100.0 100.0 99.4 96.8 94.5 87.2 44.5 0.4 0.0 0.0

933.0E† 933 100.0 100.0 100.0 100.0 99.5 97.9 84.8 18.5 0.0 0.0 0.0

926.7B 926.7 100.0 100.0 100.0 100.0 100.0 100.0 99.4 71.6 4.7 0.0 0.0

926.7C 926.7 100.0 100.0 100.0 100.0 100.0 99.5 96.3 66.6 16.6 4.4 0.1

915.4B 915.4 100.0 100.0 84.8 72.9 69.6 65.0 58.8 32.4 8.6 0.5 0.0

915.4C 915.4 100.0 100.0 100.0 99.7 99.5 98.5 95.4 62.3 5.8 0.1 0.0

915.4D 915.4 100.0 100.0 100.0 96.5 94.7 91.6 85.0 58.2 4.5 0.0 0.0

915.4E 915.4 100.0 100.0 95.0 93.3 92.2 90.6 87.5 69.2 5.1 0.0 0.0

897.9B 897.9 100.0 100.0 100.0 99.4 97.6 92.7 78.1 25.1 14.4 0.1 0.0
MRG&P Report No. 7 87

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

897.9C 897.9 100.0 100.0 100.0 100.0 99.5 99.2 97.6 86.1 53.9 2.5 0.0

897.9D 897.9 99.8 99.8 99.8 99.8 99.8 99.3 92.4 60.7 19.2 2.5 0.0

897.9E 897.9 100.0 100.0 100.0 99.4 97.6 94.5 85.0 55.8 12.3 5.8 3.1

879.8B 879.8 100.0 100.0 100.0 100.0 100.0 99.7 98.8 81.3 1.8 0.0 0.0

879.8C 879.8 100.0 100.0 100.0 100.0 99.1 97.3 91.0 54.0 0.8 0.0 0.0

879.8D 879.8 100.0 100.0 100.0 90.2 78.1 67.2 54.2 25.7 3.0 0.4 0.2

879.8E 879.8 99.9 99.9 99.9 99.9 99.6 97.6 91.5 44.6 5.0 0.2 0.0

862.7B 862.7 99.9 99.9 93.9 91.4 85.1 72.5 53.1 15.9 4.5 0.5 0.0

862.7C 862.7 100.0 100.0 100.0 100.0 100.0 99.8 99.2 96.2 73.0 0.8 0.0

862.7D 862.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.7 58.9 0.5 0.0

846.5B 846.5 100.0 100.0 100.0 100.0 99.9 99.6 97.8 31.2 0.7 0.0 0.0

846.5C 846.5 100.0 100.0 100.0 99.5 98.8 96.3 76.4 7.5 0.4 0.0 0.0

846.5D 846.5 100.0 100.0 88.6 65.7 54.0 43.3 27.0 4.8 2.0 0.2 0.0

846.5E 846.5 100.0 100.0 95.8 82.9 60.3 40.1 22.3 3.8 2.8 0.5 0.0

818.4B 818.4 100.0 100.0 100.0 99.0 97.5 92.2 74.1 36.9 1.8 0.0 0.0

818.4C 818.4 100.0 100.0 100.0 100.0 100.0 99.8 99.0 92.1 10.1 0.1 0.0

818.4D 818.4 100.0 100.0 100.0 100.0 99.6 99.0 95.0 56.7 3.0 0.0 0.0

818.4E 818.4 99.5 99.5 99.5 99.5 97.9 96.5 95.0 90.3 15.2 0.2 0.0

795.5B 795.5 100.0 100.0 100.0 99.5 99.5 99.2 97.4 60.2 13.0 0.0 0.0

795.5C 795.5 100.0 100.0 100.0 100.0 97.7 93.9 81.4 32.1 2.2 0.0 0.0

795.5D 795.5 100.0 100.0 100.0 100.0 97.0 89.9 78.0 37.4 1.5 0.0 0.0

795.5E 795.5 100.0 100.0 90.7 83.8 79.7 76.2 73.8 54.1 5.8 0.1 0.0

773.4A 773.4 100.0 100.0 100.0 100.0 99.6 98.2 88.3 42.3 1.1 0.0 0.0

773.4B 773.4 100.0 100.0 100.0 96.8 95.3 90.3 74.1 26.4 0.5 0.0 0.0

773.4C 773.4 100.0 100.0 100.0 99.3 97.5 95.0 86.1 38.7 1.0 0.0 0.0

773.4E 773.4 100.0 100.0 95.6 76.3 58.9 46.5 32.3 4.4 0.2 0.0 0.0

754.3A 754.3 100.0 100.0 100.0 92.1 82.8 69.0 54.6 17.4 4.4 0.6 0.2

754.3B 754.3 99.9 99.9 98.5 94.8 89.9 86.6 80.0 27.1 4.7 0.2 0.0

754.3C 754.3 100.0 100.0 100.0 99.0 98.6 97.3 92.3 37.3 5.0 0.1 0.0

754.3D 754.3 99.9 99.9 99.9 99.6 99.5 99.3 97.3 36.5 5.2 0.2 0.0

730.3B 730.3 100.0 100.0 97.6 94.9 92.3 85.9 70.0 8.0 0.1 0.0 0.0

730.3C 730.3 100.0 100.0 100.0 98.2 97.1 96.6 92.3 50.9 1.5 0.0 0.0

730.3D 730.3 100.0 100.0 100.0 100.0 99.7 99.4 96.6 51.4 3.2 0.0 0.0

705.0A 705 99.9 99.9 99.9 99.9 99.7 98.4 85.7 39.0 22.7 0.7 0.0

705.0C 705 100.0 100.0 100.0 100.0 99.9 99.9 99.7 79.8 2.8 0.0 0.0

705.0D 705 100.0 100.0 100.0 100.0 100.0 100.0 99.9 90.1 6.0 0.0 0.0

705.0E 705 100.0 100.0 100.0 99.2 98.0 96.7 94.4 73.4 12.4 0.4 0.0
MRG&P Report No. 7 88

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

681.7A 681.7 100.0 100.0 100.0 96.7 94.8 90.9 73.1 6.8 0.3 0.0 0.0

681.7B 681.7 100.0 100.0 100.0 98.3 97.7 96.1 86.3 10.8 0.3 0.0 0.0

681.7C 681.7 100.0 100.0 100.0 100.0 99.9 99.4 94.0 20.2 0.3 0.0 0.0

681.7D 681.7 100.0 100.0 100.0 100.0 99.9 99.9 99.7 81.2 3.8 0.0 0.0

669.9A 669.9 100.0 100.0 100.0 100.0 100.0 99.9 99.7 80.8 16.1 0.1 0.0

669.9B 669.9 100.0 100.0 100.0 100.0 100.0 100.0 99.6 74.7 12.6 0.1 0.0

669.9C 669.9 100.0 100.0 100.0 94.9 94.0 93.3 91.5 71.4 20.9 0.2 0.0

660.2A 660.2 100.0 100.0 100.0 100.0 99.9 99.8 99.0 46.7 0.8 0.0 0.0

660.2B 660.2 100.0 100.0 100.0 100.0 100.0 99.7 96.0 45.8 2.6 0.0 0.0

660.2C 660.2 100.0 100.0 100.0 100.0 100.0 99.8 98.2 59.3 1.6 0.0 0.0

660.2D 660.2 100.0 100.0 100.0 99.2 98.9 98.4 94.0 52.5 3.8 0.0 0.0

653.0A 653 100.0 100.0 100.0 98.3 98.2 98.1 96.3 32.1 1.6 0.0 0.0

653.0B 653 100.0 100.0 100.0 98.5 96.7 95.9 94.4 68.7 9.8 0.1 0.0

653.0D 653 100.0 100.0 100.0 100.0 99.9 99.8 98.4 52.6 2.5 0.0 0.0

653.0E 653 100.0 100.0 100.0 100.0 100.0 99.7 95.7 41.9 0.7 0.0 0.0

637.2B 637.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 65.6 3.7 0.0 0.0

637.2C 637.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 87.7 1.5 0.0 0.0

637.2D 637.2 100.0 100.0 100.0 99.6 99.5 98.4 92.0 38.7 12.7 2.4 1.4

637.2E 637.2 100.0 100.0 100.0 100.0 98.9 95.6 84.7 30.8 7.2 0.8 0.5

612.5B 612.5 100.0 100.0 100.0 98.1 98.1 98.1 97.6 76.1 1.1 0.0 0.0

612.5C 612.5 100.0 100.0 97.3 97.3 96.9 96.8 96.2 69.4 1.6 0.0 0.0

612.5D 612.5 99.9 99.9 99.9 99.9 99.9 99.9 99.8 88.8 27.1 1.8 0.0

598.2A 598.2 100.0 100.0 100.0 100.0 100.0 99.8 99.6 95.0 42.8 0.7 0.0

598.2B 598.2 100.0 100.0 100.0 100.0 100.0 100.0 99.7 93.7 27.6 0.3 0.0

598.2C 598.2 100.0 100.0 100.0 100.0 99.8 99.7 98.6 65.2 1.8 0.0 0.0

598.2D 598.2 100.0 100.0 100.0 97.8 94.4 92.8 88.6 66.1 10.5 0.5 0.0

595.6B 595.6 100.0 100.0 100.0 99.2 98.7 98.4 96.2 49.4 1.1 0.0 0.0

595.6C 595.6 100.0 100.0 100.0 100.0 100.0 99.5 97.3 58.0 0.6 0.0 0.0

595.6D 595.6 100.0 100.0 100.0 100.0 99.6 99.2 97.8 74.9 3.3 0.0 0.0

595.6E 595.6 100.0 66.8 34.6 17.3 6.9 2.4 0.1 0.1 0.0 0.0 0.0

590.3A 590.3 100.0 100.0 97.1 92.9 90.5 88.1 82.8 31.9 1.5 0.0 0.0

590.3B 590.3 100.0 100.0 100.0 99.6 99.1 98.5 95.8 43.0 5.5 0.1 0.0

590.3C 590.3 100.0 100.0 100.0 100.0 99.4 99.0 97.3 48.8 6.0 0.0 0.0

590.3E 590.3 100.0 100.0 100.0 100.0 100.0 99.8 99.3 88.0 25.7 0.9 0.0

572.0B 572 100.0 100.0 100.0 100.0 100.0 100.0 99.9 95.8 24.4 0.5 0.0

572.0C 572 100.0 100.0 100.0 100.0 99.8 99.6 98.6 81.6 35.0 10.2 0.3

572.0D* 572 100.0 100.0 100.0 100.0 100.0 99.9 99.8 99.3 88.1 62.8 55.1
MRG&P Report No. 7 89

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

568.7B 568.7 100.0 100.0 100.0 98.7 98.5 98.2 97.5 88.4 3.0 0.1 0.0

568.7C 568.7 100.0 100.0 100.0 100.0 99.9 99.8 99.5 88.5 6.0 0.1 0.0

568.7D 568.7 100.0 100.0 100.0 99.3 97.5 95.1 91.0 15.3 0.3 0.1 0.0

566.0A* 566 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.8 90.5 72.1 56.5

566.0B 566 99.9 99.9 99.9 99.9 99.9 99.9 99.9 98.2 23.5 2.7 0.0

566.0D* 566 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 98.6 93.9 56.8

551.8A 551.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.4 59.5 27.8 13.6

551.8B 551.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 83.6 16.6 1.1 0.0

551.8C 551.8 100.0 100.0 100.0 99.4 99.4 99.4 99.3 85.6 16.4 0.5 0.0

551.8D 551.8 100.0 100.0 100.0 98.0 97.2 95.5 92.7 77.6 4.7 0.2 0.0

532.9A 532.9 99.7 99.7 99.7 99.7 99.7 99.6 99.4 94.8 32.2 1.0 0.0

532.9B 532.9 100.0 100.0 100.0 100.0 99.9 99.7 99.0 93.0 32.5 0.9 0.1

532.9C 532.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.4 48.2 0.2 0.0

531.3A 531.3 100.0 100.0 100.0 99.3 99.1 98.9 98.2 93.2 38.3 0.2 0.0

531.3B 531.3 100.0 100.0 100.0 100.0 100.0 99.9 99.8 97.6 32.4 0.2 0.0

525.3A 525.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 96.3 15.6 0.1 0.0

525.3C 525.3 100.0 100.0 96.8 94.7 91.1 86.1 76.2 44.2 0.9 0.0 0.0

525.3D 525.3 100.0 100.0 100.0 96.9 91.6 85.7 76.4 35.1 0.3 0.0 0.0

525.3E 525.3 100.0 100.0 97.7 95.9 95.3 95.0 93.3 56.5 0.7 0.0 0.0

502.4A 502.4 100.0 100.0 100.0 100.0 100.0 100.0 98.5 87.6 34.0 6.1 2.8

502.4B 502.4 100.0 100.0 100.0 95.1 92.5 90.8 88.5 69.1 14.7 0.4 0.0

502.4C 502.4 100.0 100.0 97.1 96.7 95.9 94.8 92.4 78.3 30.1 0.3 0.0

502.4D 502.4 100.0 100.0 100.0 100.0 99.8 99.7 99.5 96.5 40.8 0.2 0.0

476.6D 476.6 100.0 100.0 100.0 100.0 99.8 99.7 98.3 83.4 14.9 0.1 0.0

476.6E 476.6 100.0 100.0 100.0 100.0 99.6 99.4 98.9 82.8 3.6 0.0 0.0

452.4A 452.4 99.8 99.8 99.8 99.8 99.8 99.6 99.0 94.3 17.6 0.2 0.0

452.4B 452.4 100.0 100.0 100.0 100.0 100.0 99.1 96.9 83.2 11.7 0.1 0.0

452.4C 452.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 96.6 21.3 0.3 0.0

433.8C 433.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 91.1 4.2 0.0 0.0

433.8E 433.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.9 11.0 0.2 0.0

427.5A 427.5 99.7 99.7 99.7 99.7 99.7 99.7 99.7 98.7 46.6 1.6 0.0

427.5B 427.5 100.0 100.0 100.0 100.0 100.0 99.9 99.4 84.8 32.7 0.4 0.0

427.5C 427.5 100.0 100.0 100.0 100.0 99.7 99.3 98.0 84.6 36.7 0.3 0.0

427.5D 427.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.8 62.9 0.4 0.0

408.7B 408.7 100.0 100.0 100.0 100.0 100.0 99.9 99.8 95.0 37.4 0.2 0.0

408.7C 408.7 100.0 100.0 100.0 100.0 99.8 99.4 98.3 78.0 14.0 0.1 0.0

408.7D 408.7 99.9 99.9 99.9 99.9 99.0 97.7 95.8 74.0 10.8 0.2 0.0
MRG&P Report No. 7 90

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

408.7E 408.7 100.0 100.0 97.2 91.3 88.1 84.6 80.3 56.4 3.1 0.1 0.0

382.2A 382.2 100.0 100.0 100.0 100.0 100.0 99.9 99.8 75.0 8.5 0.3 0.0

382.2B 382.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 92.8 10.5 0.1 0.0

382.2D 382.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 95.5 13.9 0.1 0.0

382.2E 382.2 100.0 100.0 100.0 100.0 99.7 99.6 99.3 92.4 16.2 0.1 0.0

362.4B 362.4 100.0 100.0 100.0 98.8 97.8 97.7 97.3 87.4 25.5 0.3 0.0

362.4C 362.4 100.0 100.0 100.0 99.0 98.4 97.9 96.2 72.3 8.5 0.1 0.0

362.4D 362.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 82.1 5.9 0.1 0.0

362.4E 362.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 94.0 4.9 0.1 0.0

355.0A† 355 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 96.1 93.8 90.2

355.0B 355 99.9 99.9 99.9 99.9 99.1 99.0 98.9 74.4 9.6 0.2 0.0

355.0C 355 100.0 100.0 94.1 87.1 84.6 83.7 83.3 79.4 56.8 1.1 0.0

355.0D 355 100.0 100.0 100.0 98.1 97.9 97.5 97.2 85.7 15.4 0.1 0.0

332.2B 332.2 100.0 100.0 100.0 100.0 100.0 99.9 99.8 98.3 49.3 0.2 0.0

332.2C 332.2 100.0 100.0 100.0 100.0 100.0 99.8 99.8 96.9 45.6 0.3 0.0

332.2D 332.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.0 34.6 0.2 0.0

332.2E 332.2 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.8 92.8 0.8 0.0

312.8A 312.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 93.4 0.8 0.0

312.8B 312.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.7 87.3 1.4 0.0

312.8C 312.8 100.0 100.0 100.0 100.0 99.8 99.7 99.5 97.1 56.5 0.5 0.0

312.8D 312.8 100.0 100.0 100.0 100.0 100.0 99.6 98.9 84.9 27.0 0.2 0.0

292.9B 292.9 100.0 100.0 100.0 100.0 99.8 99.7 99.7 98.7 33.3 0.2 0.0

292.9C 292.9 100.0 100.0 100.0 100.0 99.5 99.4 99.3 95.4 12.6 0.1 0.0

292.9D 292.9 100.0 100.0 93.3 78.8 76.2 74.9 74.5 71.3 15.9 0.3 0.0

292.9E 292.9 100.0 100.0 100.0 99.4 98.7 98.2 96.6 66.5 2.9 0.0 0.0

269.5A† 269.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.1 89.3 70.2

269.5B 269.5 99.8 99.8 99.8 99.8 99.8 99.8 99.7 97.7 82.3 2.2 0.0

269.5C 269.5 100.0 100.0 100.0 100.0 99.8 99.6 99.3 96.7 68.1 0.4 0.0

249.0A* 249 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.3 98.1 64.9 46.6

249.0B 249 99.9 99.9 99.9 99.9 99.9 99.9 99.8 99.8 96.8 2.3 0.0

249.0C 249 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 85.6 0.6 0.0

221.3A 221.3 100.0 100.0 100.0 100.0 99.6 98.6 95.9 68.4 5.2 3.1 2.5

221.3B* 221.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 84.6 45.8 42.9 42.7

221.3C† 221.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 96.4 90.4 80.1

200.7B 200.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.7 32.2 0.4 0.0

200.7C 200.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.1 30.8 0.2 0.0

200.7D 200.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9 97.8 15.7 0.2 0.0
MRG&P Report No. 7 91

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

200.7E 200.7 99.9 99.9 99.9 99.9 99.9 99.8 99.7 96.0 11.8 0.7 0.0

177.0A 177 99.2 99.2 99.2 99.2 99.2 99.1 99.1 99.0 85.7 2.8 0.0

177.0B 177 99.3 99.3 99.3 99.3 99.3 99.2 99.2 98.9 72.9 1.9 0.0

177.0C 177 99.8 99.8 99.8 99.8 99.8 99.7 99.7 99.3 52.1 0.9 0.0

177.0D 177 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 25.9 0.5 0.0

152.9B 152.9 99.3 99.3 99.3 99.2 99.1 99.1 99.0 98.8 78.4 2.8 0.0

152.9D 152.9 99.9 99.9 99.9 99.4 99.1 98.9 98.2 92.4 41.3 0.5 0.0

123.0B 123 100.0 100.0 100.0 99.9 99.9 99.9 99.9 98.5 73.0 1.1 0.0

123.0D† 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.9 95.0 83.4 66.0

123.0E† 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.0 91.3 83.9

89.9B 89.9 99.9 99.9 99.9 99.9 99.6 99.5 99.0 65.9 2.6 0.3 0.0

89.9C 89.9 99.9 99.9 99.9 99.9 99.7 99.7 99.7 99.0 70.0 2.6 0.0

89.9E 89.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 90.5 9.9 4.6

57.0A* 57 100.0 100.0 100.0 100.0 100.0 100.0 87.9 86.5 83.4 27.0 20.1

57.0B* 57 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.5 30.2 21.1

57.0E† 57 100.0 100.0 100.0 100.0 100.0 100.0 100.0 93.0 79.0 75.0 70.4

33.0A 33 99.3 99.3 99.3 99.3 99.3 99.3 99.2 98.9 97.7 8.0 0.0

33.0C* 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.0 35.4 27.6

33.0D* 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.6 62.1 30.2

33.0E* 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 99.4 91.8 67.6

2.8A* 2.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 99.5 29.1 21.6

2.8B* 2.8 100.0 100.0 100.0 100.0 100.0 100.0 99.7 99.5 98.5 63.0 58.9

2.8D 2.8 99.6 99.6 99.6 99.6 99.6 99.5 99.5 99.5 99.4 16.0 0.0

2.8E* 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 99.1 96.6 78.3
MRG&P Report No. 7 92

Table A5. Grain size distributions of material coarser than 0.063 mm for QC by USGS sediment laboratory, KY. 

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U196CT 1154.5 100.0 100.0 100.0 100.0 100.0 99.9 98.1 81.8 18.2 0.3 0.1

U195.5 

MOAT 1154

100.0 100.0 100.0 100.0 99.8 99.7 99.3 80.0 3.6 0.0 0.0

U192.5 1151 100.0 100.0 100.0 92.8 86.9 81.4 72.5 48.0 25.1 1.8 1.1

U188 1146.5 100.0 100.0 100.0 99.3 99.1 98.6 95.5 57.3 3.7 0.2 0.1

U184 1142.5 100.0 100.0 100.0 99.2 97.3 90.6 82.7 53.6 2.3 0.1 0.1

U175 1133.5 100.0 100.0 100.0 100.0 95.6 92.7 83.0 48.1 2.9 0.1 0.0

U145 1103.5 100.0 100.0 97.0 81.9 57.0 29.9 10.1 1.0 0.4 0.0 0.0

U131D 1089.5 100.0 100.0 100.0 100.0 97.1 90.2 65.6 11.2 0.2 0.0 0.0

U30A 988.5 100.0 100.0 80.5 74.8 71.9 67.7 62.8 48.5 7.0 0.3 0.2

U10 968.5 100.0 100.0 100.0 99.8 99.3 97.2 90.8 75.9 30.6 0.2 0.0

938.8 938.8 100.0 100.0 100.0 100.0 99.4 97.7 95.2 83.0 35.2 0.4 0.1

933.0A 933 100.0 100.0 100.0 91.5 90.1 86.3 80.6 67.7 8.4 0.1 0.0

927.9 927.9 100.0 100.0 100.0 95.6 93.5 91.2 85.3 64.8 21.8 0.1 0.0

916.8 916.8 100.0 100.0 100.0 98.6 98.4 98.1 95.9 79.9 18.9 0.3 0.1

901 901 100.0 100.0 100.0 94.3 94.1 92.5 79.4 20.4 0.3 0.0 0.0

897.9AT 897.9 100.0 100.0 100.0 92.6 92.6 92.3 90.1 69.4 3.8 0.0 0.0

897.9E 897.9 100.0 100.0 100.0 99.1 97.8 93.3 80.9 52.0 11.3 5.1 2.6

890.5 890.5 100.0 100.0 100.0 100.0 99.8 99.7 99.4 79.4 4.7 0.0 0.0

882.2 882.2 100.0 100.0 100.0 100.0 99.9 99.8 99.3 88.4 2.5 0.1 0.0

879.8C 879.8 100.0 100.0 100.0 98.9 96.9 94.7 87.7 52.8 0.6 0.1 0.0

870 870 100.0 100.0 100.0 100.0 99.7 99.0 92.2 40.8 4.5 0.0 0.0

864.5 864.5 100.0 100.0 100.0 100.0 100.0 98.9 96.2 74.9 15.5 0.1 0.0

862.7B 862.7 100.0 100.0 88.1 82.8 78.7 67.5 47.1 13.5 3.7 0.3 0.3

856 856 100.0 100.0 100.0 100.0 100.0 98.9 78.6 15.3 5.4 0.1 0.0

848.2 848.2 100.0 100.0 97.7 90.7 85.9 75.5 44.5 4.7 0.6 0.0 0.0

804.5 804.5 100.0 100.0 100.0 100.0 99.4 99.1 96.4 57.4 3.0 0.0 0.0

797.5 797.5 100.0 100.0 100.0 100.0 99.8 99.5 98.7 73.9 4.3 0.0 0.0

773.4A 773.4 100.0 100.0 100.0 100.0 99.9 98.9 87.8 42.4 1.0 0.2 0.0

770.3 770.3 100.0 100.0 100.0 100.0 99.4 96.6 82.5 28.6 1.6 0.1 0.0

764.8 764.8 100.0 100.0 100.0 100.0 100.0 99.9 99.7 97.1 18.3 0.1 0.1

754.3A 754.3 100.0 100.0 100.0 96.5 86.8 72.0 55.3 17.3 3.9 0.4 0.4

705.0C 705 100.0 100.0 100.0 100.0 100.0 99.9 99.8 80.7 2.8 0.1 0.0

692 692 100.0 100.0 100.0 99.1 98.3 96.1 87.0 46.4 6.4 0.1 0.0

687.6 687.6 100.0 100.0 100.0 100.0 100.0 99.9 99.3 71.3 2.9 0.0 0.0

677.5 677.5 100.0 100.0 100.0 98.9 97.3 94.6 80.3 33.8 2.3 0.0 0.0
MRG&P Report No. 7 93

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

664.9 664.9 100.0 100.0 100.0 100.0 100.0 100.0 99.8 91.7 3.4 0.1 0.0

641 641 100.0 100.0 100.0 99.3 98.6 97.0 88.5 66.8 11.0 0.5 0.0

632.1 632.1 100.0 100.0 100.0 100.0 99.7 99.2 98.2 72.0 3.9 0.0 0.0

632.1 632.1 100.0 100.0 100.0 100.0 100.0 99.6 98.3 73.9 4.9 0.1 0.0

625.5 625.5 100.0 100.0 100.0 97.4 97.2 96.8 93.4 48.5 1.5 0.0 0.0

623.1 623.1 100.0 100.0 100.0 100.0 97.1 93.5 83.7 32.2 0.5 0.1 0.0

595.6AT 595.6 100.0 100.0 100.0 100.0 99.3 98.7 95.5 46.1 1.1 0.0 0.0

595.6B 595.6 100.0 100.0 100.0 100.0 98.9 98.5 96.0 52.1 1.0 0.0 0.0

566.0CT 566 100.0 100.0 100.0 100.0 99.9 99.7 99.5 95.6 13.3 0.2 0.0

556.8 556.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 91.5 20.4 0.3 0.1

545 545 100.0 100.0 100.0 100.0 99.2 98.8 98.7 87.5 5.8 0.3 0.0

542.9 542.9 100.0 100.0 100.0 100.0 99.9 99.8 99.2 64.1 2.6 0.1 0.1

541.5 541.5 100.0 100.0 100.0 100.0 99.7 99.3 98.7 76.3 5.6 0.1 0.0

527.4 527.4 100.0 100.0 100.0 97.6 96.4 93.6 88.1 63.2 1.5 0.0 0.0

525.3C 525.3 100.0 100.0 89.2 89.2 85.8 81.6 72.1 41.9 0.5 0.0 0.0

525.3E 525.3 100.0 100.0 100.0 100.0 99.3 99.2 96.7 60.6 0.7 0.1 0.0

516 516 100.0 100.0 100.0 95.0 94.5 92.7 90.6 72.5 9.6 0.1 0.0

508.6 508.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 15.3 0.2 0.1

508.6 508.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.6 14.9 0.0 0.0

488.2 488.2 100.0 100.0 100.0 96.3 94.1 90.3 83.4 55.4 3.4 0.1 0.1

476.6D 476.6 100.0 100.0 100.0 100.0 100.0 99.9 98.6 84.3 15.9 0.0 0.0

466.7 466.7 100.0 100.0 100.0 100.0 100.0 99.9 99.6 95.8 32.6 0.5 0.1

432 432 100.0 100.0 100.0 100.0 100.0 99.9 99.4 86.1 2.7 0.0 0.0

427.5A 427.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.9 45.1 1.5 0.1

415 415 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.7 36.5 0.2 0.1

408.7B 408.7 100.0 100.0 100.0 100.0 100.0 99.9 99.8 95.1 32.4 0.2 0.0

353.7 353.7 100.0 100.0 100.0 100.0 99.9 99.8 99.6 93.0 18.8 0.1 0.1

338 338 100.0 100.0 100.0 98.6 98.6 98.5 98.2 90.4 10.8 0.0 0.0

312.8C 312.8 100.0 100.0 100.0 100.0 99.9 99.8 99.5 97.0 55.3 0.4 0.0

304.2 304.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 39.2 0.4 0.0

269.5B 269.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.7 80.2 1.8 1.5

268.4 268.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.4 49.9 0.6 0.0

204.8 204.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 67.8 0.6 0.1

116.7 116.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 89.4 1.5 0.2

55.4 55.4 100.0 100.0 100.0 98.8 98.6 98.5 98.4 96.3 26.9 0.6 0.5

26 26 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 97.6 2.8 0.2
MRG&P Report No. 7 94

Table A6. Grain size distributions of silts and clays determined by LD method (CHL). 

Sample 

Name 

— Percent finer than indicated size — 

0.063 mm 0.031 mm 0.016 mm 0.008 mm 0.004 mm 0.002 mm 

33.0E 55.6 31.5 18.1 10.5 4.6 0.8

44.8 0.0 0.0 0.0 0.0 0.0 0.0

GRA3C 59.2 38.3 20.3 10.6 4.6 0.8

235 50.4 27.4 13.7 7.8 3.6 0.6

269.5A 74.1 35.2 17.4 10.0 4.8 0.8

2.8B 78.3 65.0 43.8 24.6 10.7 2.1

2.8E 47.0 43.5 32.9 20.4 9.0 1.6

42.8 42.2 37.3 27.2 17.3 8.1 1.6

86 33.1 21.7 10.5 5.8 2.8 0.5

221.3B 41.5 32.0 19.6 10.6 4.7 0.9

221.3C 90.5 70.7 50.2 28.6 12.5 2.4

Table A7. Grain size distributions of silts and clays determined by pipet method for QC (USGS 

Sediment Laboratory, KY). 

Sample 

Name 

— Percent finer than indicated size — 

0.063 mm 0.031 mm 0.016 mm 0.008 mm 0.004 mm 0.002 mm 

33.0E 0.9 — — — — —

44.8 59 39.1 23.2 20.2 17.9 15.7

GRA3C 55.4 40.7 23.5 16.4 15.2 14

235 69.9 50.1 27 21.5 19.2 17.9

269.5A 80.3 49.2 23.1 18.1 15.9 14.9

2.8B 70.2 65.1 46 35 32 28.9

2.8E 76.9 51.8 30.4 24.3 22 19.4

42.8 84.7 77.2 63.5 53.6 46.5 42.8

86 42.2 29.2 15.5 11.9 10.6 8.9

221.3B 31.1 26.9 16.8 12.1 10.1 9.6

221.3C 97.5 86.6 62.3 47.6 42.3 39.5
MRG&P Report No. 7 95

Table A8. Diameter of largest gravel particle recorded for each sample, 2013. 

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle 

Grain Size 

(mm) 

 

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle Grain 

Size (mm) 

U196B 1154.5 20 722.3 722.3 45

U195.5 MOAT 1154.0 23 705.0BT 705.0 45

U195.5 MOC 1154.0 60 692 692.0 27.5

U194C 1152.5 40 683.4 683.4 37.5

U194BT 1152.5 90 681.7ET 681.7 42.5

U190 1148.5 56 681.7B 681.7 37.5

U185 1143.5 45 681.7A 681.7 39

U160E 1118.5 25 679.4 679.4 35

U160B 1118.5 30 672.1 672.1 25

U150 1108.5 35 662.4 662.4 39

U135 1093.5 75 660.2ET 660.2 29

U131E 1089.5 22.5 660.2D 660.2 24

U131C 1089.5 35 658.1 658.1 30

U131AT 1089.5 45 656.5 656.5 44

U100 1058.5 25 653.0B 653.0 60

U79E 1037.5 28 647.6 647.6 33

U79C 1037.5 71 645.7 645.7 20

U79AT 1037.5 45 640 640.0 37

U70 1028.5 83 637.2B 637.2 26

U65 1023.5 84 634.1 634.1 26

U60 1018.5 84 607.3 607.3 28

U40 998.5 36 605.9 605.9 20

U30DT 988.5 67 603.5 603.5 20

U30C 988.5 25 599.4 599.4 15

U30B 988.5 49 598.2C 598.2 17

U30A 988.5 62 595.6C 595.6 25

U10 968.5 26 595.6B 595.6 50

952.6AT 952.6 54 592.1 592.1 20

951.4 951.4 25 590.3DT 590.3 38

949.2 949.2 20 590.3C 590.3 20

GRA-BT — 25 590.3A 590.3 50

947.3 947.3 65 583.8 583.8 24

941.2 941.2 105 579.4 579.4 40

935.2B 935.2 60 572.0AT 572.0 40

931 931.0 33 570 570.0 45

929.1 929.1 50 535.4 535.4 69

927.9 927.9 25 525.3D 525.3 49
MRG&P Report No. 7 96

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle 

Grain Size 

(mm) 

 

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle Grain 

Size (mm) 

924.5 924.5 40 516 516.0 40

923 923.0 27 507 507.0 28

919.1 919.1 35 504.5 504.5 34

917.1 917.1 70 502.4B 502.4 31

915.4E 915.4 55 495.1 495.1 20

915.4C 915.4 23 490 490.0 15

913.5 913.5 38 488.2 488.2 25

911.9 911.9 31 478.6 478.6 15

909.8 909.8 45 476.6D 476.6 30

904.6 904.6 40 466.7 466.7 30

901 901.0 45 465.2 465.2 25

894.8 894.8 27.5 458.6 458.6 27.5

893.5 893.5 25 449.2 449.2 20

890.5 890.5 20 442.8 442.8 20

888.3 888.3 25 433.8E 433.8 23

886.4 886.4 55 408.7D 408.7 26

884 884.0 40 404.9 402.3 32

879.8D 879.8 45 387 387.0 31

879.8B 879.8 25 380 380.0 29

871 871.0 35 355.0C 355 49

865.7 865.7 40 341.3 341.3 67

853 853.0 20 332.2AT 332.2 44

851 851.0 20 322.6 322.6 28

846.5C 846.5 40 312.8B 312.8 20

831 831.0 18 299.7 299.7 35

828 828.0 37 292.9D 292.9 50

825.4 825.4 28 285.4 285.4 25

822 822.0 23 221.3B 221.3 9

818.4C 818.4 19 193.5 193.5 20

818.4B 818.4 43 170.6 170.6 23

818.4AT 818.4 74 123.0B 123.0 39

804.5 804.5 45 57.0E 57.0 14

799 799.0 40 57.0A 57.0 53

797.5 797.5 20 SRR1.1AT — 35

795.5D 795.5 20 SRR3.1AT — 40

795.5C 795.5 30 SRR5.1AT — 60

792.5 792.5 41 SRR5.3B — 18

789.5 789.5 52 SRR5.5C — 30
MRG&P Report No. 7 97

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle 

Grain Size 

(mm) 

 

Sample Name 

2013 River Mile 

above Head of 

Passes 

Particle Grain 

Size (mm) 

788 788.0 35 SRR7.1A — 30

786.2 786.2 39 SRR9.3B — 21

778.2 778.2 30 SRR9.5CT — 19

777 777.0 28 SRR11.3B — 48

773.4A 773.4 25 SRR13.1B — 28

771.9 771.9 41 SRR15.3B — 15

770.3 770.3 32 SRR17.5CT — 30

766.8 766.8 44 SRR19.7D — 30

754.3ET 754.3 27 ARKD — 22

754.3B 754.3 50 ARKCT — 30

754.3A 754.3 50 ARKB — 20

750.2 750.2 53 ARKA — 25

727.7 727.7 18

Table A9. Computed statistics for the 2013 samples. 

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

U204* 1162.5 0.278 0.546 0.903 1.81 0.623

U199 1157.5 0.314 0.777 17.810 12.70 6.373

U196A 1154.5 0.609 1.389 3.754 2.49 2.692

U196B 1154.5 0.305 0.497 0.864 1.68 0.658

U196CT 1154.5 0.209 0.343 0.499 1.55 0.408

U196D 1154.5 0.216 0.355 0.593 1.66 0.422

U195.5 MOAT 1154.0 0.280 0.381 0.584 1.45 0.479

U195.5 MOD 1154.0 0.164 0.320 0.589 1.89 0.458

U195.5 MOE 1154.0 0.269 0.446 1.077 2.04 0.799

U195.5 MOB 1154.0 0.275 0.511 1.016 1.92 0.775

U195.5 MOC 1154.0 0.284 0.658 6.120 5.81 2.874

U194D 1152.5 0.137 0.184 0.248 1.35 0.238

U194E 1152.5 0.131 0.191 0.338 1.62 0.241

U194BT 1152.5 0.316 1.374 7.505 4.90 3.875

U194C 1152.5 0.408 0.770 1.994 2.24 1.378

U194A* 1152.5 0.011 0.050 0.556 7.81 0.219

U192.5 1151.0 0.176 0.451 1.710 3.18 1.483

U191 1149.5 0.283 0.455 0.821 1.71 0.603

U190 1148.5 0.326 0.634 1.924 2.49 3.276

U189 1147.5 0.281 0.385 0.647 1.53 0.621
MRG&P Report No. 7 98

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

U188 1146.5 0.289 0.440 0.790 1.66 0.603

U187 1145.5 0.670 1.625 5.336 2.85 4.289

U186 1144.5 0.535 0.821 1.941 1.95 2.671

U185 1143.5 0.257 0.423 0.796 1.76 0.726

U184 1142.5 0.299 0.465 1.148 2.01 0.954

U183.5 1142.0 0.173 0.297 0.429 1.58 0.321

U183D 1141.5 0.169 0.290 0.427 1.60 0.329

U183C 1141.5 0.000 0.011 0.319 48.15 0.235

U183BT 1141.5 0.147 0.207 0.355 1.56 0.251

U183A 1141.5 0.146 0.206 0.352 1.56 0.249

U183E 1141.5 0.283 0.671 2.059 2.72 1.269

U182 1140.5 0.145 0.200 0.329 1.51 0.238

U180 1138.5 0.182 0.518 1.066 2.45 0.700

U177.5 1136.2 0.276 0.433 0.907 1.83 0.974

U175 1133.5 0.298 0.493 0.980 1.82 1.121

U174E 1132.5 0.214 0.454 0.884 2.03 0.686

U174DT 1132.5 0.328 0.590 0.997 1.74 1.251

U174C 1132.5 0.289 0.413 0.752 1.63 0.625

U174B 1132.5 0.277 0.383 0.618 1.50 0.508

U174A 1132.5 0.289 0.472 0.988 1.86 0.820

U170 1128.5 0.504 0.757 1.567 1.79 1.328

U165 1123.5 0.240 0.491 0.969 2.01 0.897

U160.5AT† 1119.0 0.005 0.018 0.053 3.20 0.050

U160B 1118.5 0.393 0.785 2.259 2.44 1.414

U160E 1118.5 0.331 0.588 0.917 1.67 0.731

U160DT 1118.5 0.275 0.449 1.266 2.23 1.188

U160C 1118.5 0.337 0.637 1.139 1.84 0.870

U155 1113.5 0.259 0.547 0.991 1.96 0.830

U150 1108.5 0.543 1.032 4.673 3.21 2.642

U145 1103.5 1.164 3.153 9.201 2.81 5.366

U140 1098.5 0.674 1.413 3.408 2.25 2.341

U135 1093.5 0.626 1.428 3.918 2.51 2.347

U131AT 1089.5 0.274 0.407 0.774 1.69 0.561

U131B 1089.5 0.271 0.358 0.474 1.32 0.407

U131C 1089.5 0.279 0.393 0.746 1.65 0.998

U131D 1089.5 0.511 0.781 1.679 1.84 1.444

U131E 1089.5 0.560 0.892 2.435 2.16 1.790

U125 1083.5 0.295 0.498 0.967 1.81 0.913
MRG&P Report No. 7 99

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

U120 1078.5 0.560 0.867 1.904 1.87 1.481

U117.5† 1076.0 0.005 0.017 0.039 2.76 0.037

U117E 1075.5 0.628 1.093 2.275 1.91 1.536

U117D 1075.5 0.531 0.758 1.340 1.60 1.005

U117C 1075.5 0.294 0.477 0.815 1.67 0.572

U117BT 1075.5 0.598 1.431 8.285 4.09 4.082

U117A 1075.5 0.229 0.343 0.480 1.45 0.423

U115 1073.5 0.154 0.248 0.757 2.33 0.659

U110 1068.5 0.288 0.435 0.811 1.69 0.651

U105 1063.5 0.225 0.339 0.473 1.45 0.467

U100 1058.5 0.301 0.504 0.992 1.82 1.646

U95 1053.5 0.155 0.245 0.399 1.61 0.281

U90 1048.5 0.235 0.442 0.986 2.05 0.994

U85 1043.5 0.303 0.509 0.858 1.68 0.620

U79AT 1037.5 0.285 0.498 0.905 1.78 0.745

U79B 1037.5 0.380 0.651 0.949 1.59 0.796

U79C 1037.5 0.204 0.953 14.205 9.78 6.007

U79D 1037.5 0.268 0.468 0.816 1.75 0.561

U79E 1037.5 0.307 0.518 0.862 1.68 0.636

U76† 1034.5 0.006 0.019 0.051 3.03 0.046

U75 1033.5 0.261 0.443 0.819 1.77 0.682

U70 1028.5 0.275 0.469 17.204 19.19 5.163

U65 1023.5 0.308 0.691 13.611 10.97 5.119

U60 1018.5 0.301 0.464 0.867 1.70 0.758

U55 1013.5 0.370 0.665 1.027 1.67 0.815

U50 1008.5 0.542 0.891 1.911 1.89 1.604

U45 1003.5 0.761 1.631 5.651 2.80 3.771

U40 998.5 0.277 0.382 0.627 1.51 0.510

U35 993.5 0.311 0.536 0.971 1.77 0.803

U30B 988.5 0.280 0.429 0.852 1.76 0.662

U30C 988.5 0.275 0.404 0.770 1.69 0.604

U30DT 988.5 0.322 1.046 16.673 9.59 6.041

U30E 988.5 0.316 0.528 0.817 1.61 0.580

U30A 988.5 0.281 0.475 30.419 32.90 8.928

U25 983.5 0.275 0.389 0.736 1.65 1.142

U20 978.5 1.265 2.729 7.780 2.50 5.048

U15 973.5 0.167 0.308 0.622 1.93 0.445

U10 968.5 0.216 0.363 0.739 1.86 0.611
MRG&P Report No. 7 100

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

U05 963.5 0.216 0.608 6.243 6.54 3.529

U1.5A 960.0 0.424 0.786 1.738 2.03 1.385

U1.5B 960.0 0.200 0.322 0.446 1.50 0.358

U1.5C 960.0 0.268 0.358 0.478 1.34 0.436

U1.5DT 960.0 0.267 0.347 0.453 1.30 0.380

958.8A 958.8 0.286 0.404 0.743 1.63 0.553

958.8B 958.8 0.522 1.020 2.543 2.22 1.634

958.8CT 958.8 0.365 6.207 14.948 9.70 8.233

955.7 955.7 3.035 7.912 13.886 2.18 9.053

952.6AT 952.6 0.057 0.375 1.127 4.81 1.027

952.6C 952.6 0.168 0.303 0.499 1.72 0.423

952.6D 952.6 0.293 0.489 0.879 1.73 0.651

952.6E 952.6 0.310 0.536 0.952 1.75 0.769

952.6B 952.6 0.338 0.694 2.096 2.54 1.814

951.4 951.4 0.503 0.754 1.507 1.75 1.153

949.2 949.2 0.339 0.597 0.910 1.64 0.719

947.3 947.3 0.301 0.470 0.814 1.65 0.593

945 945.0 0.253 0.361 0.580 1.52 0.544

942.8 942.8 0.324 0.590 0.954 1.72 0.894

941.2 941.2 0.354 0.653 0.997 1.69 1.392

938.8 938.8 0.174 0.316 0.537 1.76 0.501

937 937.0 0.277 0.468 0.883 1.79 0.684

935.2A 935.2 0.317 0.535 0.896 1.68 0.820

935.2B 935.2 0.372 0.804 21.442 14.41 7.644

935.2CT 935.2 0.525 0.779 1.658 1.81 1.310

933.0A 933.0 0.275 0.393 0.924 1.89 1.659

933.0B 933.0 0.327 0.659 18.177 14.79 7.550

933.0C 933.0 0.320 0.546 0.949 1.72 0.896

933.0DT 933.0 0.410 0.709 1.657 2.03 2.857

933.0E† 933.0 0.485 0.683 0.991 1.43 0.841

931 931.0 0.271 0.359 0.477 1.33 1.327

929.1 929.1 0.287 0.420 0.853 1.75 0.772

927.9 927.9 0.194 0.374 0.859 2.11 0.832

926.7AT 926.7 0.484 0.887 3.193 2.72 2.635

926.7B 926.7 0.281 0.400 0.681 1.56 0.477

926.7C 926.7 0.242 0.397 0.751 1.77 0.500

924.5 924.5 0.323 0.596 0.993 1.75 1.054

923 923.0 0.211 0.375 0.760 1.90 0.635
MRG&P Report No. 7 101

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

919.1 919.1 0.291 0.498 1.117 1.98 1.042

917.1 917.1 0.223 0.703 7.127 6.65 3.710

916.8 916.8 0.230 0.356 0.577 1.58 0.470

915.4AT 915.4 0.724 1.823 5.520 2.77 3.564

915.4B 915.4 0.310 0.793 15.268 10.90 5.789

915.4C 915.4 0.283 0.430 0.787 1.67 0.595

915.4D 915.4 0.290 0.450 0.974 1.86 1.132

915.4E 915.4 0.281 0.406 0.875 1.80 1.949

913.5 913.5 0.318 0.577 0.995 1.77 0.813

911.9 911.9 0.256 0.356 0.496 1.39 0.504

909.8 909.8 0.221 0.381 0.711 1.80 0.514

908.1 908.1 0.281 0.490 0.984 1.87 2.522

905.9 905.9 0.289 0.592 1.726 2.48 1.258

904.6 904.6 0.491 0.873 3.694 3.00 2.386

902.3 902.3 0.304 0.498 0.844 1.67 0.647

901 901.0 0.417 0.690 1.056 1.59 0.880

898.9 898.9 0.363 0.628 0.913 1.59 0.757

897.9AT 897.9 0.642 1.321 3.602 2.39 2.362

897.9C 897.9 0.150 0.237 0.478 1.80 0.366

897.9D 897.9 0.219 0.418 0.832 1.95 0.547

897.9E 897.9 0.265 0.456 0.977 1.93 0.812

897.9B 897.9 0.278 0.692 1.323 2.20 1.010

896.7 896.7 0.328 0.621 1.192 1.91 1.134

894.8 894.8 0.295 0.485 0.840 1.69 0.603

893.5 893.5 0.286 0.395 0.659 1.53 0.505

891.8 891.8 0.336 0.599 0.920 1.66 0.896

890.5 890.5 0.275 0.378 0.575 1.45 0.442

888.3 888.3 0.553 0.846 1.797 1.83 1.424

886.4 886.4 0.298 0.456 0.879 1.73 0.748

884 884.0 0.552 0.955 6.782 4.42 3.020

882.2 882.2 0.280 0.367 0.480 1.31 0.415

879.8C 879.8 0.305 0.475 0.877 1.70 0.681

879.8B 879.8 0.283 0.381 0.557 1.40 0.455

879.8D 879.8 0.372 0.904 5.597 4.31 2.725

879.8E 879.8 0.303 0.542 0.895 1.72 0.679

879.8AT 879.8 0.279 0.394 0.707 1.60 0.825

878.1 878.1 0.143 0.192 0.285 1.41 0.224

877 877.0 0.204 0.562 1.207 2.45 0.940
MRG&P Report No. 7 102

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

875.7 875.7 0.353 0.755 1.591 2.12 1.228

873.7 873.7 0.285 0.402 0.713 1.59 0.514

871 871.0 0.280 0.471 0.917 1.82 0.683

870 870.0 0.305 0.560 0.885 1.71 0.742

867.3 867.3 0.255 0.338 0.448 1.32 0.361

865.7 865.7 0.521 0.777 1.498 1.71 1.146

864.5 864.5 0.246 0.365 0.636 1.61 0.507

862.7ET 862.7 0.269 0.382 0.640 1.55 0.463

862.7D 862.7 0.150 0.225 0.383 1.60 0.266

862.7C 862.7 0.145 0.201 0.348 1.56 0.261

862.7B 862.7 0.501 0.943 3.775 2.94 3.114

860.4 860.4 0.301 0.589 0.998 1.82 0.834

858.6 858.6 0.191 0.331 0.492 1.61 0.403

857 857.0 0.290 0.510 1.175 2.03 0.857

856 856.0 0.507 0.726 1.151 1.51 0.879

855 855.0 0.511 0.709 0.985 1.39 0.832

853 853.0 0.301 0.464 0.882 1.72 0.738

851 851.0 0.298 0.554 1.279 2.08 1.030

849.4 849.4 0.490 0.685 0.944 1.39 0.830

848.2 848.2 0.000 0.461 2.190 616.74 1.832

846.5AT 846.5 0.308 0.587 1.093 1.88 0.743

846.5B 846.5 0.354 0.608 0.866 1.57 0.657

846.5C 846.5 0.544 0.767 1.302 1.55 1.021

846.5D 846.5 0.710 3.084 13.935 4.43 6.916

846.5E 846.5 0.789 2.809 8.490 3.29 4.920

844.6 844.6 0.309 0.503 0.912 1.72 0.803

842.5 842.5 0.338 0.592 0.878 1.62 0.662

840.1 840.1 0.393 0.695 1.274 1.80 1.115

835.5 835.5 0.410 0.788 2.369 2.46 1.765

833.6 833.6 0.293 0.467 0.825 1.68 0.610

831 831.0 0.274 0.419 0.781 1.70 0.582

828 828.0 0.309 0.537 0.936 1.74 0.940

825.4 825.4 0.504 0.692 0.951 1.37 0.862

822 822.0 0.241 0.349 0.490 1.43 0.423

818.4E 818.4 0.252 0.345 0.472 1.37 0.503

818.4AT 818.4 0.570 1.826 12.296 4.97 5.683

818.4B 818.4 0.331 0.638 1.461 2.11 1.052

818.4C 818.4 0.263 0.350 0.467 1.33 0.396
MRG&P Report No. 7 103

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

818.4D 818.4 0.296 0.458 0.819 1.67 0.594

816.2 816.2 0.568 0.803 1.569 1.68 1.971

814.8 814.8 0.326 0.559 0.837 1.60 0.608

813 813.0 0.259 0.385 0.683 1.63 0.469

810.6 810.6 0.261 0.350 0.469 1.34 0.392

807.9 807.9 0.581 0.910 1.853 1.80 1.446

804.5 804.5 0.295 0.462 0.809 1.66 0.617

802.1 802.1 0.256 0.341 0.454 1.33 0.379

799 799.0 0.304 0.544 0.873 1.70 0.692

797.5 797.5 0.281 0.395 0.665 1.54 0.478

795.5AT 795.5 0.314 0.538 0.843 1.64 0.660

795.5B 795.5 0.261 0.430 0.779 1.73 0.574

795.5C 795.5 0.344 0.643 1.154 1.83 0.926

795.5D 795.5 0.331 0.620 1.418 2.08 1.013

795.5E 795.5 0.289 0.472 8.149 9.45 3.762

792.5 792.5 0.290 0.471 0.831 1.70 0.711

789.5 789.5 0.289 0.446 0.803 1.67 0.668

788 788.0 0.309 0.526 0.886 1.69 0.706

786.2 786.2 0.521 0.723 1.020 1.40 0.944

783.4 783.4 0.558 0.783 1.353 1.57 1.007

780.2 780.2 0.260 0.351 0.473 1.35 0.403

778.2 778.2 0.267 0.402 0.731 1.66 0.537

777 777.0 0.263 0.390 0.743 1.70 0.540

775.2 775.2 0.290 0.464 0.827 1.69 0.599

773.4DT 773.4 0.571 0.970 3.571 2.69 3.110

773.4E 773.4 0.667 2.431 10.559 3.99 5.223

773.4A 773.4 0.321 0.561 0.937 1.71 0.715

773.4B 773.4 0.379 0.705 1.526 2.01 1.323

773.4C 773.4 0.329 0.590 0.970 1.72 0.898

771.9 771.9 0.472 0.735 1.469 1.78 1.119

770.3 770.3 0.382 0.671 1.053 1.66 0.871

768.8 768.8 0.264 0.344 0.449 1.30 0.380

766.8 766.8 0.300 0.486 0.828 1.66 0.601

764.8 764.8 0.203 0.322 0.441 1.48 0.344

762.2 762.2 0.250 0.411 0.822 1.82 0.608

760.1 760.1 0.331 0.598 0.937 1.69 0.899

757.8 757.8 0.277 0.411 0.746 1.65 0.528

755.7 755.7 0.296 0.446 0.788 1.64 0.631
MRG&P Report No. 7 104

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

754.3A 754.3 0.464 0.918 4.362 3.36 2.468

754.3B 754.3 0.355 0.675 1.525 2.08 1.764

754.3C 754.3 0.317 0.587 0.900 1.69 0.797

754.3D 754.3 0.318 0.583 0.859 1.65 0.666

754.3ET 754.3 0.314 0.533 0.853 1.65 0.627

752.7 752.7 0.284 0.417 0.781 1.67 0.577

750.2 750.2 0.307 0.608 1.341 2.09 2.117

746.5 746.5 0.401 0.679 1.009 1.59 0.944

744.7 744.7 0.350 0.612 0.907 1.61 0.742

742 742.0 0.339 0.621 1.144 1.84 1.372

740.6 740.6 0.334 0.619 1.457 2.10 1.865

737.4 737.4 0.360 0.630 0.924 1.61 0.819

734.6 734.6 0.184 0.389 0.811 2.10 0.542

732.7 732.7 0.290 0.433 0.758 1.62 0.523

730.3B 730.3 0.547 0.799 1.840 1.88 1.978

730.3C 730.3 0.307 0.494 0.870 1.69 0.860

730.3D 730.3 0.300 0.490 0.824 1.66 0.595

730.3ET 730.3 0.273 0.462 0.787 1.70 0.530

727.7 727.7 0.189 0.323 0.467 1.57 0.413

725 725.0 0.322 0.570 0.915 1.69 0.802

722.3 722.3 0.341 0.684 1.600 2.17 1.084

719.5 719.5 0.287 0.418 0.727 1.60 0.501

716.8 716.8 0.309 0.525 0.821 1.63 0.590

714.3 714.3 0.149 0.217 0.373 1.59 0.259

712.9 712.9 0.156 0.252 0.447 1.69 0.420

709.9 709.9 0.266 0.353 0.470 1.33 0.428

707.2 707.2 0.331 0.600 0.898 1.65 0.699

705.0A 705.0 0.202 0.589 0.974 2.28 0.696

705.0BT 705.0 0.316 0.548 0.948 1.73 2.037

705.0C 705.0 0.281 0.382 0.578 1.44 0.452

705.0D 705.0 0.272 0.359 0.476 1.32 0.402

705.0E 705.0 0.260 0.383 0.709 1.66 0.644

702.9 702.9 0.177 0.464 3.326 4.90 2.772

700.3 700.3 0.312 0.642 1.682 2.34 1.421

697.5 697.5 0.273 0.365 0.489 1.34 0.415

695.6 695.6 0.551 0.718 0.936 1.30 0.872

694 694.0 0.505 0.764 1.568 1.78 1.719

692 692.0 0.291 0.518 0.912 1.77 0.723
MRG&P Report No. 7 105

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

689.9 689.9 0.272 0.367 0.494 1.35 0.423

687.6 687.6 0.288 0.412 0.710 1.58 0.497

683.4 683.4 0.287 0.426 0.762 1.64 0.708

681.7ET 681.7 0.292 0.425 0.891 1.77 0.713

681.7C 681.7 0.431 0.661 0.910 1.45 0.728

681.7D 681.7 0.279 0.378 0.556 1.41 0.446

681.7A 681.7 0.551 0.786 1.530 1.69 1.419

681.7B 681.7 0.524 0.717 0.979 1.37 1.049

679.4 679.4 0.154 0.242 0.486 1.79 0.354

677.5 677.5 0.336 0.631 1.116 1.82 0.866

674.5 674.5 0.305 0.511 0.833 1.65 0.614

672.1 672.1 0.332 0.602 0.918 1.67 0.744

669.9DT 669.9 0.342 0.610 0.892 1.62 0.854

669.9A 669.9 0.249 0.360 0.563 1.51 0.420

669.9B 669.9 0.260 0.380 0.648 1.58 0.452

669.9C 669.9 0.212 0.373 0.772 1.91 1.095

666.8 666.8 0.274 0.399 0.773 1.70 1.196

664.9 664.9 0.276 0.361 0.472 1.31 0.404

663.9 663.9 0.252 0.352 0.494 1.40 0.426

662.4 662.4 0.290 0.509 0.917 1.78 0.687

660.2ET 660.2 0.323 0.584 1.026 1.78 0.973

660.2D 660.2 0.297 0.482 0.846 1.69 0.694

660.2C 660.2 0.297 0.447 0.776 1.62 0.541

660.2B 660.2 0.310 0.530 0.848 1.65 0.607

660.2A 660.2 0.314 0.522 0.819 1.61 0.585

658.1 658.1 0.308 0.487 0.810 1.62 0.573

656.5 656.5 0.342 0.631 1.102 1.79 0.843

654.6 654.6 0.299 0.501 0.965 1.80 0.874

653.0A 653 0.347 0.607 0.875 1.60 0.841

653.0B 653 0.269 0.401 0.755 1.69 0.768

653.0CT 653 0.279 0.404 0.728 1.63 0.558

653.0D 653.0 0.301 0.482 0.804 1.63 0.565

653.0E 653.0 0.323 0.555 0.860 1.63 0.628

650.2 650.2 0.334 0.585 0.897 1.64 0.732

647.6 647.6 0.523 0.743 1.280 1.57 1.179

645.7 645.7 0.255 0.362 0.554 1.47 0.432

643.4 643.4 0.623 1.072 2.454 2.00 1.901

641 641.0 0.267 0.411 0.863 1.82 0.667
MRG&P Report No. 7 106

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

640 640.0 0.318 0.577 1.149 1.90 1.165

637.2AT 637.2 0.272 0.371 0.544 1.42 0.928

637.2B 637.2 0.287 0.420 0.725 1.60 0.498

637.2C 637.2 0.281 0.369 0.485 1.31 0.419

637.2D 637.2 0.273 0.579 0.902 1.84 0.700

637.2E 637.2 0.324 0.640 0.991 1.76 0.834

634.1 634.1 0.278 0.402 0.717 1.62 0.573

632.1† 632.1 0.357 0.496 0.694 1.40 0.645

629.3 629.3 0.301 0.475 0.801 1.63 0.602

628 628 0.273 0.355 0.462 1.30 0.389

625.5 625.5 0.310 0.519 0.844 1.65 0.676

623.1 623.1 0.343 0.617 0.970 1.69 0.900

620.8 620.8 0.307 0.503 0.879 1.69 0.790

617.7 617.7 0.199 0.323 0.452 1.51 0.353

614.7 614.7 0.271 0.356 0.467 1.31 0.402

612.5AT 612.5 0.420 0.811 4.499 3.74 3.177

612.5B 612.5 0.287 0.393 0.646 1.51 0.682

612.5C 612.5 0.290 0.410 0.730 1.60 1.139

612.5D 612.5 0.185 0.323 0.474 1.61 0.364

610 610.0 0.220 0.331 0.454 1.44 0.360

607.3 607.3 0.326 0.589 0.926 1.69 0.808

605.9 605.9 0.271 0.561 1.236 2.14 0.884

603.5 603.5 0.319 0.552 0.844 1.63 0.682

601 601.0 0.173 0.446 43.955 50.59 16.921

599.4 599.4 0.483 0.682 0.936 1.39 0.806

598.2A 598.2 0.161 0.275 0.432 1.64 0.317

598.2B 598.2 0.186 0.316 0.451 1.56 0.348

598.2C 598.2 0.292 0.424 0.739 1.60 0.525

598.2D 598.2 0.268 0.409 0.869 1.83 0.974

598.2ET† 598.2 0.182 0.335 0.608 1.83 0.418

595.6AT 595.6 0.320 0.555 0.869 1.65 0.748

595.6B 595.6 0.309 0.504 0.835 1.64 0.703

595.6C 595.6 0.301 0.454 0.791 1.62 0.559

595.6D 595.6 0.283 0.393 0.659 1.53 0.503

595.6E 595.6 7.336 22.288 45.820 2.55 26.368

592.1 592.1 0.221 0.361 0.630 1.69 0.469

590.3E 590.3 0.191 0.328 0.478 1.59 0.377

590.3DT 590.3 0.322 0.576 0.926 1.70 1.007
MRG&P Report No. 7 107

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

590.3C 590.3 0.294 0.509 0.827 1.68 0.608

590.3B 590.3 0.304 0.548 0.857 1.68 0.680

590.3A 590.3 0.348 0.640 1.165 1.83 1.985

588.5 588.5 0.218 0.349 0.534 1.56 0.467

585.2 585.2 0.241 0.349 0.491 1.43 0.477

583.8 583.8 0.276 0.357 0.464 1.30 0.430

581.3 581.3 0.163 0.277 0.422 1.61 0.310

579.4 579.4 0.286 0.392 0.676 1.55 0.632

575† 575 0.302 0.463 0.691 1.51 0.527

576.5 576.5 0.153 0.239 0.400 1.62 0.281

572.0C 572 0.147 0.313 0.552 1.95 0.392

572.0B 572 0.196 0.321 0.446 1.51 0.345

572.0AT 572 0.302 0.469 0.924 1.76 2.240

572.0D* 572 0.011 0.055 0.223 4.52 0.122

570 570 0.369 1.647 6.513 4.21 3.818

568.7ET† 568.7 0.000 0.002 0.009 10.09 0.032

568.7D 568.7 0.503 0.687 0.938 1.37 0.951

568.7C 568.7 0.272 0.362 0.482 1.33 0.415

568.7B 568.7 0.278 0.366 0.483 1.32 0.577

566.0B 566 0.195 0.320 0.438 1.51 0.335

566.0CT 566 0.253 0.338 0.451 1.34 0.371

566.0D* 566 0.010 0.053 0.104 3.52 0.068

566.0A* 566 0.010 0.047 0.196 4.43 0.107

565.2 565.2 0.175 0.305 0.439 1.59 0.343

562.8 562.8 0.312 0.546 0.917 1.72 1.273

561.3 561.3 0.211 0.326 0.444 1.45 0.365

559.8 559.8 0.290 0.408 0.886 1.79 1.691

556.8 556.8 0.208 0.331 0.464 1.50 0.368

554.1 554.1 0.232 0.356 0.597 1.61 0.622

551.8ET 551.8 0.284 0.383 0.580 1.43 0.493

551.8D 551.8 0.278 0.384 0.671 1.56 0.775

551.8C 551.8 0.245 0.350 0.492 1.42 0.461

551.8B 551.8 0.243 0.353 0.509 1.45 0.405

551.8A* 551.8 0.071 0.203 0.387 2.39 0.235

548.8 548.8 0.270 0.466 0.960 1.89 1.533

546.8 546.8 0.282 0.401 0.768 1.67 1.233

545 545 0.327 0.563 0.842 1.61 0.716

542.9 542.9 0.289 0.423 0.739 1.60 0.521
MRG&P Report No. 7 108

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

541.5 541.5 0.277 0.393 0.697 1.59 1.213

538.2 538.2 0.274 0.366 0.489 1.34 0.495

535.4 535.4 0.289 0.405 0.757 1.64 1.634

532.9A 532.9 0.174 0.304 0.443 1.60 0.333

532.9DT 532.9 0.254 0.339 0.452 1.33 0.370

532.9C 532.9 0.157 0.256 0.406 1.61 0.287

532.9B 532.9 0.174 0.305 0.451 1.62 0.353

531.3CT 531.3 0.175 0.314 0.488 1.67 0.415

531.3B 531.3 0.176 0.302 0.433 1.58 0.325

531.3A 531.3 0.167 0.290 0.445 1.64 0.422

527.4 527.4 0.296 0.442 0.923 1.79 1.503

525.3C 525.3 0.319 0.567 1.727 2.41 1.931

525.3BT 525.3 0.367 0.728 2.349 2.60 1.807

525.3A 525.3 0.251 0.336 0.450 1.34 0.359

525.3D 525.3 0.342 0.642 1.765 2.31 1.450

525.3E 525.3 0.302 0.461 0.839 1.67 1.316

522.5 522.5 0.259 0.356 0.491 1.38 0.409

519.1 519.1 0.251 0.343 0.467 1.36 0.402

518.1 518.1 0.265 0.382 0.720 1.66 0.657

516 516 0.265 0.383 0.722 1.66 0.846

514.1† 514.1 0.300 0.416 0.581 1.39 0.510

511.5 511.5 0.284 0.381 0.549 1.39 0.514

508.6† 508.6 0.281 0.363 0.472 1.30 0.399

507 507 0.286 0.422 0.841 1.73 1.207

504.5 504.5 0.285 0.429 0.836 1.73 0.971

502.4ET 502.4 0.279 0.359 0.462 1.29 0.399

502.4D 502.4 0.164 0.280 0.428 1.62 0.324

502.4C 502.4 0.180 0.333 0.662 1.92 1.204

502.4B 502.4 0.254 0.392 0.851 1.86 1.205

502.4A* 502.4 0.160 0.307 0.477 1.74 0.362

497.3 497.3 0.253 0.346 0.473 1.37 0.385

495.1 495.1 0.272 0.358 0.471 1.32 0.407

491.8 491.8 0.283 0.399 0.690 1.57 0.588

490 490 0.242 0.335 0.452 1.37 0.380

488.2 488.2 0.295 0.462 0.975 1.84 1.005

485.5 485.5 0.180 0.313 0.461 1.60 0.908

482.8 482.8 0.292 0.454 0.876 1.74 0.658

480.6 480.6 0.171 0.293 0.423 1.58 0.310
MRG&P Report No. 7 109

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

478.6 478.6 0.178 0.306 0.437 1.57 0.329

476.6CT 476.6 0.219 0.325 0.437 1.42 0.340

476.6D 476.6 0.253 0.357 0.514 1.43 0.430

476.6E 476.6 0.279 0.375 0.526 1.37 0.460

469.6 469.6 0.274 0.376 0.584 1.46 0.637

468.8 468.8 0.253 0.342 0.462 1.35 0.383

466.7 466.7 0.169 0.294 0.434 1.61 0.324

465.2 465.2 0.153 0.236 0.510 1.85 0.339

462 462 0.263 0.349 0.462 1.32 0.383

460.8 460.8 0.262 0.348 0.462 1.33 0.380

458.6 458.6 0.190 0.320 0.455 1.55 0.364

456.8 456.8 0.257 0.391 4.255 6.20 1.964

454.8 454.8 0.287 0.422 0.813 1.70 0.755

452.4A 452.4 0.235 0.335 0.456 1.39 0.370

452.4B 452.4 0.261 0.362 0.521 1.41 0.453

452.4C 452.4 0.210 0.326 0.445 1.46 0.349

452.4DT 452.4 0.275 0.386 0.672 1.57 0.539

449.2 449.2 0.280 0.384 0.602 1.47 0.472

446.8 446.8 0.258 0.348 0.470 1.35 0.403

445.2 445.2 0.144 0.201 0.335 1.53 0.239

442.8 442.8 0.252 0.351 0.489 1.39 0.469

439.8 439.8 0.270 0.349 0.451 1.29 0.373

434.9 434.9 0.313 0.729 2.601 2.95 1.541

433.8E 433.8 0.260 0.341 0.447 1.31 0.362

433.8BT 433.8 0.291 0.424 0.749 1.61 0.545

433.8C 433.8 0.275 0.360 0.472 1.31 0.400

433.8D 433.8 0.266 0.346 0.450 1.30 0.369

432 432 0.279 0.369 0.487 1.32 0.440

429.3 429.3 0.255 0.338 0.448 1.33 0.364

427.5D 427.5 0.149 0.217 0.376 1.60 0.262

427.5ET 427.5 0.159 0.266 0.409 1.60 0.291

427.5C 427.5 0.169 0.303 0.496 1.72 0.396

427.5A 427.5 0.156 0.262 0.411 1.62 0.289

427.5B 427.5 0.175 0.315 0.495 1.69 0.376

425.6 425.6 0.223 0.358 0.605 1.65 0.434

424 424.0 0.275 0.409 0.850 1.78 0.683

422.3 422.3 0.302 0.484 3.315 4.23 3.571

420.1 420.1 0.171 0.296 0.434 1.60 0.339
MRG&P Report No. 7 110

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

418.3 418.3 0.251 0.339 0.457 1.35 0.368

415 415.0 0.167 0.285 0.419 1.59 0.305

413.3 413.3 0.258 0.343 0.455 1.33 0.371

411.5 411.5 0.270 0.380 0.627 1.53 0.502

409.5 409.5 0.192 0.320 0.452 1.54 0.360

408.7AT 408.7 0.171 0.294 0.429 1.59 0.325

408.7B 408.7 0.168 0.291 0.438 1.62 0.326

408.7C 408.7 0.255 0.369 0.614 1.55 0.459

408.7D 408.7 0.265 0.384 0.688 1.62 0.546

408.7E 408.7 0.296 0.460 1.809 2.75 2.114

404.9 404.9 0.297 0.457 0.850 1.70 0.934

402.3† 402.3 0.384 0.547 0.824 1.46 0.997

399.4 399.4 0.177 0.303 0.431 1.57 0.323

397.9 397.9 0.231 0.338 0.465 1.42 1.375

393.8 393.8 0.206 0.328 0.457 1.49 0.374

391 391 0.256 0.345 0.465 1.35 0.391

389.8 389.8 0.161 0.272 0.413 1.60 0.296

387 387 0.263 0.350 0.464 1.33 0.385

385 385 0.180 0.306 0.433 1.56 0.326

382.2E 382.2 0.248 0.340 0.463 1.37 0.392

382.2D 382.2 0.254 0.340 0.453 1.34 0.366

382.2CT 382.2 0.168 0.288 0.420 1.59 0.310

382.2B 382.2 0.262 0.349 0.464 1.33 0.383

382.2A 382.2 0.270 0.385 0.642 1.55 0.454

380 380.0 0.286 0.404 0.756 1.64 0.763

378.1 378.1 0.270 0.358 0.475 1.33 0.412

375.5 375.5 0.233 0.352 0.520 1.49 0.519

371.2 371.2 0.159 0.265 0.410 1.61 0.293

367.7 367.7 0.220 0.345 0.495 1.50 0.430

364.8 364.8 0.195 0.321 0.449 1.52 0.349

362.4AT 362.4 0.262 0.350 0.466 1.33 0.453

362.4B 362.4 0.192 0.329 0.481 1.59 0.567

362.4C 362.4 0.271 0.393 0.702 1.62 0.632

362.4D 362.4 0.274 0.373 0.538 1.40 0.433

362.4E 362.4 0.273 0.355 0.462 1.30 0.389

359.3 359.3 0.301 0.492 0.849 1.68 0.995

357 357.0 0.210 0.323 0.438 1.45 0.339

355.0D 355.0 0.251 0.352 0.492 1.40 0.633
MRG&P Report No. 7 111

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

355.0C 355.0 0.150 0.230 2.511 6.23 2.645

355.0A† 355.0 0.006 0.019 0.045 2.72 0.052

355.0B 355.0 0.268 0.385 0.656 1.57 0.497

355.0ET 355.0 0.163 0.298 0.877 2.39 1.727

353.7 353.7 0.208 0.329 0.457 1.49 0.381

351.3 351.3 0.308 0.482 0.870 1.69 1.217

346.1 346.1 0.260 0.346 0.462 1.33 0.401

343.7 343.7 0.163 0.278 0.416 1.60 0.299

341.3 341.3 0.289 0.554 11.829 11.64 4.817

340 340 0.284 0.400 0.697 1.58 0.672

338 338 0.252 0.343 0.465 1.36 0.398

334.4 334.4 0.255 0.356 0.498 1.40 0.506

332.2AT 332.2 0.262 0.360 0.493 1.37 0.550

332.2B 332.2 0.156 0.252 0.409 1.62 0.291

332.2C 332.2 0.159 0.265 0.420 1.63 0.305

332.2D 332.2 0.172 0.296 0.429 1.59 0.317

332.2E 332.2 0.140 0.181 0.234 1.29 0.202

330.4 330.4 0.160 0.269 0.412 1.60 0.295

328.3 328.3 0.149 0.217 0.372 1.59 0.258

325.8 325.8 0.141 0.184 0.240 1.31 0.216

323.9 323.9 0.177 0.301 0.426 1.56 0.318

322.6 322.6 0.151 0.226 0.384 1.60 0.267

321.1 321.1 0.256 0.390 0.718 1.68 0.508

316 316.0 0.180 0.305 0.428 1.55 0.320

314.5 314.5 0.177 0.304 0.433 1.57 0.325

312.8A 312.8 0.140 0.181 0.233 1.29 0.200

312.8B 312.8 0.141 0.185 0.243 1.32 0.215

312.8C 312.8 0.152 0.231 0.400 1.63 0.292

312.8D 312.8 0.188 0.329 0.494 1.63 0.394

312.8ET 312.8 0.212 0.329 0.453 1.47 0.364

311.4 311.4 0.196 0.320 0.444 1.51 0.346

309.8 309.8 0.153 0.237 0.397 1.61 0.278

308.5 308.5 0.250 0.339 0.459 1.36 0.370

306.3 306.3 0.204 0.322 0.441 1.47 0.350

304.2 304.2 0.162 0.274 0.413 1.60 0.295

303.1 303.1 0.147 0.209 0.357 1.56 0.249

299.7 299.7 0.256 0.338 0.445 1.32 0.358

297.5 297.5 0.144 0.194 0.297 1.44 0.227
MRG&P Report No. 7 112

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

294.2 294.2 0.264 0.352 0.470 1.33 0.397

292.9AT 292.9 0.148 0.213 0.373 1.60 0.270

292.9B 292.9 0.174 0.298 0.428 1.57 0.328

292.9C 292.9 0.257 0.342 0.454 1.33 0.398

292.9D 292.9 0.250 0.383 10.239 14.13 3.787

292.9E 292.9 0.288 0.418 0.749 1.62 0.621

289.8 289.8 0.181 0.312 0.454 1.59 0.346

288.6 288.6 0.191 0.322 0.459 1.56 0.356

285.4 285.4 0.149 0.218 0.385 1.62 0.273

283.3 283.3 0.217 0.349 0.537 1.57 0.447

282 282.0 0.193 0.330 0.483 1.59 0.379

279.7 279.7 0.203 0.321 0.439 1.48 0.340

277.2 277.2 0.267 0.349 0.456 1.31 0.378

275.5 275.5 0.250 0.337 0.454 1.35 0.364

272.2 272.2 0.141 0.185 0.243 1.31 0.210

269.5A† 269.5 0.015 0.041 0.097 2.57 0.066

269.5B 269.5 0.141 0.189 0.270 1.39 0.227

269.5C 269.5 0.147 0.208 0.368 1.59 0.273

269.5DT 269.5 0.256 0.408 0.736 1.70 0.486

268.4 268.4 0.153 0.241 0.400 1.62 0.280

265.3 265.3 0.152 0.234 0.391 1.60 0.273

263 263.0 0.187 0.324 0.478 1.60 0.377

260.9 260.9 0.132 0.175 0.232 1.32 0.223

258.8 258.8 0.257 0.375 0.680 1.64 0.620

257.6 257.6 0.151 0.229 0.396 1.62 0.277

254.9 254.9 0.143 0.191 0.277 1.39 0.224

253 253.0 0.232 0.342 0.478 1.44 0.384

251 251.0 0.187 0.311 0.432 1.53 0.327

249.0B 249 0.138 0.177 0.228 1.28 0.193

249.0C 249 0.142 0.187 0.247 1.32 0.215

249.0DT 249 0.152 0.234 0.391 1.60 0.272

249.0A* 249 0.012 0.072 0.186 4.34 0.105

247.5 247.5 0.188 0.311 0.430 1.52 0.326

246 246.0 0.139 0.180 0.232 1.29 0.205

244.8 244.8 0.145 0.204 0.354 1.57 0.277

242.4 242.4 0.178 0.303 0.432 1.57 0.324

240.3 240.3 0.131 0.175 0.232 1.33 0.189

238.1 238.1 0.270 0.348 0.448 1.29 0.370
MRG&P Report No. 7 113

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

235* 235.0 0.015 0.049 0.183 3.48 0.090

227.8 227.8 0.248 0.357 0.545 1.48 0.448

226.6 226.6 0.262 0.371 0.599 1.52 0.455

224.2 224.2 0.216 0.334 0.466 1.47 0.386

221.3A 221.3 0.281 0.409 0.741 1.63 0.543

221.3B* 221.3 0.012 0.269 0.495 12.08 0.281

221.3C† 221.3 0.006 0.023 0.078 3.56 0.061

221.3DT 221.3 0.143 0.195 0.313 1.49 0.237

220 220 0.174 0.300 0.430 1.58 0.320

217.3 217.3 0.162 0.275 0.418 1.61 0.300

215.6 215.6 0.152 0.233 0.394 1.61 0.274

213.3 213.3 0.147 0.210 0.359 1.57 0.250

211.4 211.4 0.139 0.179 0.230 1.29 0.196

209 209.0 0.141 0.186 0.244 1.32 0.211

206.2 206.2 0.179 0.304 0.427 1.55 0.318

204.8 204.8 0.147 0.209 0.358 1.57 0.266

202.1 202.1 0.157 0.262 0.415 1.62 0.301

200.7AT 200.7 0.144 0.199 0.327 1.51 0.235

200.7B 200.7 0.176 0.301 0.429 1.57 0.319

200.7C 200.7 0.179 0.304 0.429 1.56 0.320

200.7D 200.7 0.251 0.334 0.445 1.33 0.353

200.7E 200.7 0.259 0.342 0.453 1.32 0.369

198.2 198.2 0.149 0.220 0.383 1.61 0.266

196.2 196.2 0.150 0.225 0.382 1.60 0.265

193.5 193.5 0.141 0.188 0.253 1.34 0.217

191.4 191.4 0.147 0.215 0.369 1.59 0.254

189.4 189.4 0.140 0.186 0.246 1.32 0.212

186.8 186.8 0.192 0.320 0.449 1.53 0.348

184.8 184.8 0.145 0.204 0.365 1.60 0.258

181.5 181.5 0.175 0.307 0.456 1.62 0.350

179.2 179.2 0.150 0.232 0.392 1.62 0.270

177.0A 177 0.140 0.185 0.246 1.33 0.212

177.0B 177 0.143 0.200 0.336 1.54 0.236

177.0C 177 0.153 0.243 0.399 1.61 0.279

177.0D 177.0 0.191 0.313 0.431 1.51 0.326

177.0ET 177.0 0.267 0.349 0.458 1.31 0.378

173.7 173.7 0.172 0.302 0.450 1.62 0.858

172 172.0 0.146 0.212 0.366 1.59 0.251
MRG&P Report No. 7 114

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

170.6 170.6 0.149 0.223 0.382 1.60 0.263

168.5 168.5 0.223 0.326 0.438 1.40 0.341

164.8 164.8 0.140 0.185 0.244 1.32 0.210

162.2* 162.2 0.134 0.179 0.239 1.34 0.201

160.2 160.2 0.149 0.220 0.377 1.59 0.260

157.7 157.7 0.154 0.242 0.412 1.64 0.320

156.4 156.4 0.142 0.189 0.263 1.36 0.223

152.9B 152.9 0.141 0.193 0.303 1.47 0.242

152.9CT 152.9 0.145 0.203 0.344 1.55 0.245

152.9D 152.9 0.163 0.281 0.446 1.66 0.403

150 150.0 0.148 0.220 0.377 1.60 0.262

147.3 147.3 0.150 0.224 0.382 1.60 0.265

144.3 144.3 0.142 0.191 0.284 1.42 0.224

142.4* 142.4 0.031 0.160 0.221 3.27 0.160

140.3 140.3 0.140 0.180 0.232 1.29 0.197

136.6 136.6 0.165 0.287 0.440 1.64 0.328

133.6 133.6 0.139 0.182 0.238 1.31 0.206

132 132.0 0.150 0.223 0.389 1.62 0.271

127.5 127.5 0.140 0.183 0.239 1.31 0.212

125.7* 125.7 0.138 0.183 0.243 1.33 0.207

123.0B 123 0.144 0.200 0.337 1.54 0.254

123.0CT* 123 0.078 0.162 0.222 1.73 0.169

123.0D† 123 0.009 0.037 0.130 3.79 0.082

123.0E† 123 0.005 0.019 0.064 3.50 0.056

116.7 116.7 0.140 0.183 0.239 1.31 0.206

114.1 114.1 0.139 0.178 0.228 1.28 0.216

110 110.0 0.142 0.191 0.280 1.40 0.223

107.5 107.5 0.140 0.185 0.244 1.32 0.210

104.5* 104.5 0.138 0.179 0.231 1.29 0.201

103 103.0 0.146 0.206 0.352 1.56 0.245

96.4 96.4 0.147 0.210 0.359 1.57 0.250

91.5* 91.5 0.072 0.167 0.229 1.84 0.174

89.9B 89.9 0.289 0.420 0.731 1.60 0.517

89.9C 89.9 0.143 0.203 0.349 1.57 0.253

89.9DT 89.9 0.138 0.180 0.234 1.30 0.222

89.9E* 89.9 0.132 0.176 0.236 1.34 0.193

86* 86 0.017 0.096 0.199 3.83 0.111

82.7* 82.7 0.139 0.183 0.241 1.31 0.205
MRG&P Report No. 7 115

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

81.5 81.5 0.144 0.206 0.352 1.57 0.243

78* 78 0.132 0.174 0.230 1.32 0.188

75.2* 75.2 0.137 0.177 0.228 1.29 0.193

73.1 73.1 0.146 0.210 0.367 1.59 0.259

65.8 65.8 0.137 0.175 0.225 1.28 0.188

63 63.0 0.142 0.202 0.544 2.06 0.306

59 59.0 0.140 0.186 0.248 1.33 0.217

57.0E† 57.0 0.005 0.020 0.341 10.82 0.139

57.0DT 57.0 0.143 0.196 0.318 1.50 0.238

57.0A* 57.0 0.025 0.166 0.287 4.24 0.322

57.0B* 57.0 0.020 0.153 0.216 4.53 0.149

55.4 55.4 0.186 0.313 0.436 1.54 0.352

52.8 52.8 0.137 0.176 0.225 1.28 0.187

51.2 51.2 0.127 0.168 0.221 1.32 0.176

47.3 47.3 0.143 0.199 0.340 1.55 0.322

44.8 44.8 0.143 0.199 0.331 1.53 0.237

42.8* 42.8 0.006 0.090 0.202 8.21 0.113

40* 40.0 0.134 0.193 0.327 1.57 0.223

37 37.0 0.144 0.202 0.342 1.55 0.238

35.2 35.2 0.137 0.176 0.227 1.29 0.190

33.0E* 33.0 0.010 0.043 0.100 3.24 0.062

33.0C* 33.0 0.013 0.147 0.212 6.23 0.139

33.0D* 33.0 0.019 0.096 0.187 3.49 0.112

33.0BT† 33.0 0.004 0.013 0.171 8.34 0.082

33.0A 33.0 0.133 0.173 0.225 1.30 0.184

30.4 30.4 0.135 0.175 0.227 1.30 0.184

26 26.0 0.138 0.177 0.228 1.29 0.193

23.9 23.9 0.132 0.172 0.223 1.30 0.180

21.9* 21.9 0.130 0.173 0.232 1.34 0.186

18* 18.0 0.004 0.012 0.059 3.90 0.058

13.5* 13.5 0.006 0.037 0.194 5.93 0.105

11.9* 11.9 0.005 0.023 0.188 6.15 0.094

5.5† 5.5 0.248 0.357 0.512 1.44 0.408

2.8A* 2.8 0.022 0.154 0.215 4.15 0.149

2.8B* 2.8 0.007 0.034 0.188 5.25 0.098

2.8CT* 2.8 0.006 0.021 0.062 3.26 0.057

2.8E* 2.8 0.004 0.014 0.078 4.51 0.051

2.8D 2.8 0.125 0.166 0.220 1.33 0.173
MRG&P Report No. 7 116

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

ARKA 0.274 0.380 0.598 1.48 0.456

ARKB 0.282 0.390 0.648 1.52 0.536

ARKCT 0.288 0.416 0.764 1.64 0.755

ARKD 0.212 0.324 0.439 1.44 0.351

GRA2-A* 0.129 0.228 0.435 1.84 0.292

GRA2-BT 0.204 0.383 0.828 2.02 0.575

GRA2-C 0.279 0.445 2.044 3.09 1.328

GRA2-D 0.323 0.642 1.619 2.26 1.048

GRA3-A† 0.007 0.027 0.169 5.01 0.088

GRA3-B* 0.004 0.014 0.040 3.03 0.053

GRA3-C* 0.013 0.049 0.175 3.71 0.101

GRA-A 0.366 5.873 24.263 10.10 11.227

GRA-BT 0.327 0.631 1.497 2.15 1.266

GRA-C* 0.245 0.388 0.744 1.75 0.482

GRA-D 0.279 0.423 0.822 1.73 0.606

GRA-E† 0.004 0.015 0.050 3.34 0.052

SRR1.1AT 0.303 0.486 0.941 1.77 0.999

SRR1.3B 0.296 0.464 0.821 1.67 0.621

SRR1.5C 0.156 0.259 0.486 1.77 0.379

SRR11.1AT 0.144 0.199 0.328 1.52 0.236

SRR11.3B 0.562 1.383 3.593 2.53 2.354

SRR13.1AT 0.255 0.345 0.467 1.35 0.400

SRR13.1B 0.163 0.281 0.436 1.64 0.343

SRR13.5C 0.151 0.235 0.459 1.76 0.565

SRR13.7D 0.285 0.559 0.848 1.74 0.601

SRR15.1AT 0.735 1.517 3.918 2.32 2.990

SRR15.3B 0.344 0.594 0.862 1.59 0.643

SRR15.5C 0.286 0.636 1.490 2.28 1.616

SRR17.1A 0.498 1.018 2.709 2.35 1.750

SRR17.3B 0.324 0.579 0.950 1.71 0.834

SRR17.5CT 0.223 1.383 6.136 5.32 3.352

SRR19.3B 0.297 0.501 0.858 1.70 0.616

SRR19.5CT 0.270 0.403 0.732 1.66 0.530

SRR19.7D 0.136 0.204 0.463 1.88 1.003

SRR3.1AT 0.457 0.815 1.724 1.95 1.147

SRR3.3B 0.283 0.424 0.746 1.63 0.511

SRR5.1AT 0.464 0.820 1.774 1.97 1.419

SRR5.3B 0.285 0.403 0.682 1.55 0.483
MRG&P Report No. 7 117

Sample Name 

River Mile 

above Head of 

Passes 

Size 

Sorting 

Coefficient 

Mean 

Diameter 

D16 (mm) (mm) 

D50 

(mm) 

D84 

(mm) 

SRR5.5C 0.194 0.329 0.481 1.58 0.425

SRR7.1A 0.441 0.694 0.998 1.51 1.043

SRR7.3B 0.367 0.644 0.931 1.60 0.739

SRR9.3B 0.272 0.432 0.887 1.82 0.927

SRR9.5CT 0.555 0.773 1.348 1.57 1.077

Table A10. GPS coordinates of sample locations. 

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 220.9 GRA3AT (Illinois River) 13 38.83156 -90.14341 15:46:52 11/7/2013 MVS

Upper 

Mississippi 220.9 GRA3B (Illinois River) 26 38.83082 -90.14343 15:54:54 11/7/2013 MVS

Upper 

Mississippi 220.9 GRA3C (Illinois River) 34 38.82995 -90.14383 16:06:12 11/7/2013 MVS

Upper 

Mississippi 220.7 GRA2A 7.5 38.82895 -90.14417 16:32:55 11/7/2013 MVS

Upper 

Mississippi 220.7 GRA2BT 10 38.82786 -90.14457 16:36:43 11/7/2013 MVS

Upper 

Mississippi 220.7 GRA2C 20 38.85644 -90.12582 16:40:56 11/7/2013 MVS

Upper 

Mississippi 220.7 GRA2D 11 38.81910 -90.11135 16:45:19 11/7/2013 MVS

Upper 

Mississippi 217.2 GRA-A 9 38.81948 -90.11320 15:06:15 11/7/2013 MVS

Upper 

Mississippi 217.2 GRA-BT 34 38.81930 -90.11530 15:10:14 11/7/2013 MVS

Upper 

Mississippi 217.2 GRA-C 20 38.81928 -90.11677 15:16:52 11/7/2013 MVS

Upper 

Mississippi 217.2 GRA-D 4 38.79316 -90.12490 15:19:12 11/7/2013 MVS

Upper 

Mississippi 217.2 GRA-E taken from 

land 0 38.79361 -90.12534 15:26:26 11/7/2013 MVS

Upper 

Mississippi 204 204T 56 38.79463 -90.12636 14:30:01 11/7/2013 MVS

Upper 

Mississippi 199 199 38 38.79528 -90.12770 11:33:56 11/7/2013 MVS

Upper 

Mississippi 196 196A 16 38.79627 -90.12837 11:48:50 11/7/2013 MVS

Upper 

Mississippi 196 196B 13 38.78245 -90.14995 11:53:17 11/7/2013 MVS
MRG&P Report No. 7 118

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 196 196CT 20 38.76639 -90.16967 11:59:42 11/7/2013 MVS

Upper 

Mississippi 196 196D 17 38.88387 -90.18833 12:05:28 11/7/2013 MVS

Upper 

Mississippi 195.5 195.5 MOA 15 38.96675 -90.40956 10:34:53 11/7/2013 MVS

Upper 

Mississippi 195.5 195.5 MOBT 15 38.96491 -90.40953 10:42:02 11/7/2013 MVS

Upper 

Mississippi 195.5 195.5 MOC 6 38.96251 -90.40993 10:46:49 11/7/2013 MVS

Upper 

Mississippi 195.5 195.5 MOD 0 38.96083 -90.41013 11:12:56 11/7/2013 MVS

Upper 

Mississippi 195.5 195.5 MOE taken 

from land 0 38.95882 -90.41083 11:13:45 11/7/2013 MVS

Upper 

Mississippi 194 194A 20 38.96934 -90.47910 12:25:45 11/7/2013 MVS

Upper 

Mississippi 194 194BT 42 38.96778 -90.47881 12:31:11 11/7/2013 MVS

Upper 

Mississippi 194 194C 30 38.96715 -90.47880 12:36:19 11/7/2013 MVS

Upper 

Mississippi 194 194D 21 38.94817 -90.47707 12:46:59 11/7/2013 MVS

Upper 

Mississippi 194 194E 18 38.94717 -90.47527 12:50:55 11/7/2013 MVS

Upper 

Mississippi 192.5 192.5T 18 38.94562 -90.47288 13:05:56 11/7/2013 MVS

Upper 

Mississippi 191 191T 15 38.94511 -90.47138 13:15:25 11/7/2013 MVS

Upper 

Mississippi 190 U190 20 38.75217 -90.17621 15:47:42 11/7/2013 MVS

Upper 

Mississippi 189 U189 18.5 38.74404 -90.18904 16:05:25 11/7/2013 MVS

Upper 

Mississippi 188 U188 13 38.73486 -90.20569 16:19:37 11/7/2013 MVS

Upper 

Mississippi 187 U187 15 38.72215 -90.21401 16:26:18 11/7/2013 MVS

Upper 

Mississippi 186 U186 13 38.70796 -90.21318 16:31:41 11/7/2013 MVS

Upper 

Mississippi 185 U185 14 38.69526 -90.20535 16:37:37 11/7/2013 MVS

Upper 

Mississippi 184 U184 24 38.68368 -90.19474 16:46:23 11/7/2013 MVS

Upper 

Mississippi 183.5 U183.5 27 38.67870 -90.19079 16:51:39 11/7/2013 MVS
MRG&P Report No. 7 119

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 183 U183E 10 38.67178 -90.18798 16:57:23 11/7/2013 MVS

Upper 

Mississippi 183 U183D 18 38.67158 -90.18518 17:02:02 11/7/2013 MVS

Upper 

Mississippi 183 U183C 13 38.67229 -90.18420 17:04:41 11/7/2013 MVS

Upper 

Mississippi 183 U183BT 30 38.67284 -90.18336 17:07:15 11/7/2013 MVS

Upper 

Mississippi 183 U183A 25 38.67289 -90.18274 17:14:01 11/7/2013 MVS

Upper 

Mississippi 182 U182 20 38.65712 -90.18092 17:21:01 11/7/2013 MVS

Upper 

Mississippi 180 U180 28 38.62703 -90.17849 17:30:08 11/7/2013 MVS

Upper 

Mississippi 177.5 U177.5 19 38.59566 -90.19518 18:29:12 11/7/2013 MVS

Upper 

Mississippi 175 U175 22 38.57261 -90.22797 18:36:27 11/7/2013 MVS

Upper 

Mississippi 174 U174E 22 38.56074 -90.23994 18:42:12 11/7/2013 MVS

Upper 

Mississippi 174 U174DT 24 38.56000 -90.23929 18:45:24 11/7/2013 MVS

Upper 

Mississippi 174 U174C 18 38.55904 -90.23842 18:48:01 11/7/2013 MVS

Upper 

Mississippi 174 U174B 10 38.55862 -90.23751 18:51:04 11/7/2013 MVS

Upper 

Mississippi 174 U174A 3 38.55825 -90.23667 18:54:00 11/7/2013 MVS

Upper 

Mississippi 170 U170 18.5 38.50622 -90.27149 19:19:52 11/7/2013 MVS

Upper 

Mississippi 165 U165 22 38.43368 -90.28869 19:30:25 11/7/2013 MVS

Upper 

Mississippi 160.5 U160.5AT 8 38.39600 -90.34471 19:49:17 11/7/2013 MVS

Upper 

Mississippi 160 U160E 25 38.38166 -90.34967 20:03:10 11/7/2013 MVS

Upper 

Mississippi 160 U160DT 27 38.38123 -90.34863 20:06:27 11/7/2013 MVS

Upper 

Mississippi 160 U160C 17 38.38060 -90.34746 20:09:42 11/7/2013 MVS

Upper 

Mississippi 160 U160B 12 38.38076 -90.34648 20:12:59 11/7/2013 MVS

Upper 

Mississippi 160 U160A 8 38.38037 -90.34544 20:15:45 11/7/2013 MVS
MRG&P Report No. 7 120

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 155 U155 20 38.31108 -90.37264 20:30:27 11/7/2013 MVS

Upper 

Mississippi 150 U150 23 38.23980 -90.36562 20:49:35 11/7/2013 MVS

Upper 

Mississippi 145 U145 40 38.17768 -90.31729 21:01:57 11/7/2013 MVS

Upper 

Mississippi 140 U140 30 38.12994 -90.25694 21:12:43 11/7/2013 MVS

Upper 

Mississippi 135 U135 20 38.07817 -90.19303 21:22:24 11/7/2013 MVS

Upper 

Mississippi 131 U131AT 39 38.06149 -90.12449 21:33:23 11/7/2013 MVS

Upper 

Mississippi 131 U131B 12 38.06058 -90.12609 21:37:18 11/7/2013 MVS

Upper 

Mississippi 131 U131C 1 38.06000 -90.12658 21:40:54 11/7/2013 MVS

Upper 

Mississippi 131 U131D 0 38.05950 -90.12829 21:49:00 11/7/2013 MVS

Upper 

Mississippi 131 U131E 0 38.05907 -90.12968 21:54:00 11/7/2013 MVS

Upper 

Mississippi 125 U125 22 38.00597 -90.05165 15:14:21 11/8/2013 MVS

Upper 

Mississippi 120 U120 25 37.96154 -89.98002 15:26:27 11/8/2013 MVS

Upper 

Mississippi 117.5 U117.5 16 37.97660 -89.93958 15:37:11 11/8/2013 MVS

Upper 

Mississippi 117 U117E 2 37.97151 -89.92641 15:48:18 11/8/2013 MVS

Upper 

Mississippi 117 U117D 7 37.97236 -89.92613 15:51:54 11/8/2013 MVS

Upper 

Mississippi 117 U117C 40 37.97325 -89.92522 15:55:18 11/8/2013 MVS

Upper 

Mississippi 117 U117BT 50 37.97364 -89.92554 15:59:46 11/8/2013 MVS

Upper 

Mississippi 117 U117A 30 37.97454 -89.92516 16:04:03 11/8/2013 MVS

Upper 

Mississippi 115 U115 29 37.94882 -89.90465 16:13:55 11/8/2013 MVS

Upper 

Mississippi 110 U110 23 37.90358 -89.83772 16:24:27 11/8/2013 MVS

Upper 

Mississippi 105 U105 29 37.86661 -89.76065 16:45:20 11/8/2013 MVS

Upper 

Mississippi 100 U100 19 37.81614 -89.69942 16:57:50 11/8/2013 MVS
MRG&P Report No. 7 121

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 95 U95 20 37.76105 -89.66816 17:39:24 11/8/2013 MVS

Upper 

Mississippi 90 U90 25 37.72117 -89.60539 17:49:39 11/8/2013 MVS

Upper 

Mississippi 85 U85 20 37.69824 -89.52299 18:00:41 11/8/2013 MVS

Upper 

Mississippi 79 U79AT 21 37.61953 -89.50368 18:19:08 11/8/2013 MVS

Upper 

Mississippi 79 U79B 18 37.61944 -89.50536 18:24:11 11/8/2013 MVS

Upper 

Mississippi 79 U79C 6 37.61947 -89.50693 18:28:43 11/8/2013 MVS

Upper 

Mississippi 79 U79D 0 37.60621 -89.51052 18:48:23 11/8/2013 MVS

Upper 

Mississippi 79 U79E 0 37.60621 -89.51052 18:49:22 11/8/2013 MVS

Upper 

Mississippi 76 U76 0 37.57544 -89.51397 19:18:59 11/8/2013 MVS

Upper 

Mississippi 75 U75 18 37.56277 -89.52303 19:29:22 11/8/2013 MVS

Upper 

Mississippi 70 U70 21 37.49667 -89.49315 19:48:49 11/8/2013 MVS

Upper 

Mississippi 65 U65 23 37.43855 -89.43955 20:02:09 11/8/2013 MVS

Upper 

Mississippi 60 U60 24 37.37189 -89.42272 20:16:01 11/8/2013 MVS

Upper 

Mississippi 55 U55 29 37.33800 -89.48390 20:25:40 11/8/2013 MVS

Upper 

Mississippi 50 50T 20 37.27253 -89.52713 9:52:03 11/8/2013 MVS

Upper 

Mississippi 45 45T 27 37.23502 -89.46050 11:04:31 11/8/2013 MVS

Upper 

Mississippi 40 40T 18 37.16783 -89.44214 11:27:59 11/8/2013 MVS

Upper 

Mississippi 35 35T 19 37.10994 -89.39359 11:34:26 11/8/2013 MVS

Upper 

Mississippi 30 30A 1 37.04412 -89.38097 11:50:31 11/8/2013 MVS

Upper 

Mississippi 30 30B 19 37.04329 -89.38191 11:54:15 11/8/2013 MVS

Upper 

Mississippi 30 30C 41 37.04263 -89.38232 11:57:44 11/8/2013 MVS

Upper 

Mississippi 30 30DT 45 37.04243 -89.38288 12:08:34 11/8/2013 MVS
MRG&P Report No. 7 122

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Upper 

Mississippi 30 30E 40 37.04215 -89.38348 12:15:08 11/8/2013 MVS

Upper 

Mississippi 25 25T 30 37.00461 -89.30561 12:51:11 11/8/2013 MVS

Upper 

Mississippi 20 20T 52 37.03014 -89.26489 13:11:45 11/8/2013 MVS

Upper 

Mississippi 15 15T 21 37.08270 -89.29769 13:27:58 11/8/2013 MVS

Upper 

Mississippi 10 10T 22 37.04719 -89.24243 13:44:51 11/8/2013 MVS

Upper 

Mississippi 5 5T 27 36.99262 -89.19695 13:55:28 11/8/2013 MVS

Upper 

Mississippi 1.5 UM1.5A 24 36.97886 -89.15185 14:08:47 11/8/2013 MVM

Upper 

Mississippi 1.5 UM1.5B 20 36.97781 -89.15127 14:16:18 11/8/2013 MVM

Upper 

Mississippi 1.5 UM1.5C 18 36.97689 -89.15079 14:24:14 11/8/2013 MVM

Upper 

Mississippi 1.5 UM1.5DT 24 36.97592 -89.15017 14:39:32 11/8/2013 MVM

Lower 

Mississippi 958.8 958.8A 13 37.03936 -89.17454 8:26:07 11/9/2013 MVM

Lower 

Mississippi 958.5 958.5B 7 37.03979 -89.17965 8:31:23 11/9/2013 MVM

Lower 

Mississippi 955.7 955.7T 48 37.03976 -89.18205 8:56:02 11/9/2013 MVM

Lower 

Mississippi 952.6 952.6AT 50 36.99749 -89.15717 9:05:28 11/9/2013 MVM

Lower 

Mississippi 952.6 952.6B 26 36.97942 -89.10636 9:13:26 11/9/2013 MVM

Lower 

Mississippi 952.6 952.6C 13 36.97849 -89.10827 9:18:00 11/9/2013 MVM

Lower 

Mississippi 952.6 952.6D 7 36.97734 -89.11012 9:21:15 11/9/2013 MVM

Lower 

Mississippi 952.6 952.6E 7 36.97653 -89.11181 9:24:56 11/9/2013 MVM

Lower 

Mississippi 951.4 951.4T 48 36.97583 -89.11382 9:40:54 11/9/2013 MVM

Lower 

Mississippi 949.2 949.2T 32 36.96332 -89.09609 9:56:32 11/9/2013 MVM

Lower 

Mississippi 947.3 947.3T 38 36.93134 -89.10490 10:11:52 11/9/2013 MVM

Lower 

Mississippi 945 945.0T 32 36.90634 -89.12112 10:30:15 11/9/2013 MVM
MRG&P Report No. 7 123

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 942.8 942.8T 34 36.87317 -89.12576 10:41:20 11/9/2013 MVM

Lower 

Mississippi 941.2 941.2T 47 36.84218 -89.13750 10:53:12 11/9/2013 MVM

Lower 

Mississippi 938.8 938.8T 63 36.81919 -89.14539 11:05:23 11/9/2013 MVM

Lower 

Mississippi 937 937.0T 78 36.78797 -89.12642 11:15:42 11/9/2013 MVM

Lower 

Mississippi 935.2 935.2A 10 36.76408 -89.11581 11:24:24 11/9/2013 MVM

Lower 

Mississippi 935.2 935.2B 17 36.73997 -89.13310 11:27:39 11/9/2013 MVM

Lower 

Mississippi 935.2 935.2CT 34 36.74166 -89.13407 11:32:05 11/9/2013 MVM

Lower 

Mississippi 933 933.0A 13 36.74317 -89.13470 11:40:09 11/9/2013 MVM

Lower 

Mississippi 933 933.0B 19 36.72056 -89.15854 11:43:57 11/9/2013 MVM

Lower 

Mississippi 933 933.0C 36 36.72085 -89.15963 11:54:11 11/9/2013 MVM

Lower 

Mississippi 933 933.0DT 37 36.72092 -89.16073 11:59:57 11/9/2013 MVM

Lower 

Mississippi 933 933.0E 30 36.72096 -89.16174 12:03:16 11/9/2013 MVM

Lower 

Mississippi 931 931.0T 28 36.72148 -89.16245 12:44:48 11/9/2013 MVM

Lower 

Mississippi 929.1 929.1T 39 36.69362 -89.14975 12:52:58 11/9/2013 MVM

Lower

Mississippi 927.9 927.9T 45 36.66680 -89.15656 13:01:31 11/9/2013 MVM

Lower 

Mississippi 926.7 926.7AT 34 36.65075 -89.16436 13:08:01 11/9/2013 MVM

Lower 

Mississippi 926.7 926.7B 26 36.63821 -89.18128 13:12:04 11/9/2013 MVM

Lower 

Mississippi 926.7 926.7C 12 36.63993 -89.18383 13:17:58 11/9/2013 MVM

Lower 

Mississippi 925.5 924.5T 63 36.64243 -89.18870 13:31:54 11/9/2013 MVM

Lower 

Mississippi 923 923.0T 50 36.61206 -89.20512 13:39:56 11/9/2013 MVM

Lower 

Mississippi 919.1 919.1T 38 36.59057 -89.20782 14:04:26 11/9/2013 MVM

Lower 

Mississippi 917.1 917.1T 35 36.56394 -89.26276 14:22:46 11/9/2013 MVM
MRG&P Report No. 7 124

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 916.8 916.8T 40 36.58547 -89.28816 14:27:20 11/9/2013 MVM

Lower 

Mississippi 915.4 915.4 B 10 36.58927 -89.28998 14:54:36 11/9/2013 MVM

Lower 

Mississippi 915.4 915.4AT 25 36.59935 -89.31161 14:51:01 11/9/2013 MVM

Lower 

Mississippi 915.4 915.4C 22 36.60061 -89.31065 14:58:22 11/9/2013 MVM

Lower 

Mississippi 915.4 915.4D 22 36.60166 -89.30990 15:01:16 11/9/2013 MVM

Lower 

Mississippi 915.4 915.4E 21 36.60333 -89.30967 15:04:15 11/9/2013 MVM

Lower 

Mississippi 913.5 913.5T 35 36.60456 -89.30871 15:13:45 11/9/2013 MVM

Lower 

Mississippi 911.9 911.9T 40 36.59670 -89.34189 15:24:37 11/9/2013 MVM

Lower 

Mississippi 909.8 909.8 67 36.58077 -89.36240 15:18:58 11/9/2013 MVM

Lower 

Mississippi 908.1 908.1 55 36.56867 -89.39320 15:28:55 11/9/2013 MVM

Lower 

Mississippi 905.9 905.9 40 36.54717 -89.40526 15:37:39 11/9/2013 MVM

Lower 

Mississippi 904.6 904.6 40 36.51468 -89.40593 15:43:38 11/9/2013 MVM

Lower 

Mississippi 902.3 902.3 27 36.49572 -89.41185 15:53:18 11/9/2013 MVM

Lower 

Mississippi 901 901 22 36.46926 -89.43881 16:00:10 11/9/2013 MVM

Lower 

Mississippi 898.9 898.9 50 36.45788 -89.46044 16:09:31 11/9/2013 MVM

Lower 

Mississippi 897.9 897.9AT 60 36.47212 -89.49708 16:15:21 11/9/2013 MVM

Lower 

Mississippi 897.9 897.9B 46 36.48576 -89.49291 16:24:38 11/9/2013 MVM

Lower 

Mississippi 897.9 897.9C 28 36.48501 -89.49150 16:28:28 11/9/2013 MVM

Lower 

Mississippi 897.9 897.9D 15 36.48434 -89.49023 16:31:52 11/9/2013 MVM

Lower 

Mississippi 897.9 897.9E 10 36.48390 -89.48902 16:34:47 11/9/2013 MVM

Lower 

Mississippi 896.7 896.7 40 36.48347 -89.48777 16:41:50 11/9/2013 MVM

Lower 

Mississippi 894.8 894.8 32 36.50135 -89.48370 16:50:18 11/9/2013 MVM
MRG&P Report No. 7 125

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 893.5 893.5 32 36.52733 -89.46959 16:55:40 11/9/2013 MVM

Lower 

Mississippi 891.8 891.8 45 36.54508 -89.46495 17:03:30 11/9/2013 MVM

Lower 

Mississippi 890.5 890.5 53 36.56714 -89.47667 17:48:25 11/9/2013 MVM

Lower 

Mississippi 888.3 888.3 30 36.57835 -89.49918 17:57:49 11/9/2013 MVM

Lower 

Mississippi 886.4 886.4 43 36.57357 -89.54175 18:06:31 11/9/2013 MVM

Lower 

Mississippi 884 884 50 36.54935 -89.56644 18:14:25 11/9/2013 MVM

Lower 

Mississippi 882.2 882.2 35 36.51407 -89.55507 18:21:39 11/9/2013 MVM

Lower 

Mississippi 879.8 879.8AT 55 36.49419 -89.53314 18:29:40 11/9/2013 MVM

Lower 

Mississippi 879.8 879.8B 45 36.46103 -89.51885 18:36:00 11/9/2013 MVM

Lower 

Mississippi 879.8 879.8C 24 36.46207 -89.51932 18:39:37 11/9/2013 MVM

Lower 

Mississippi 879.8 879.8D 10 36.46237 -89.52069 18:42:46 11/9/2013 MVM

Lower 

Mississippi 879.8 879.8E 1.3 36.46294 -89.52178 18:46:03 11/9/2013 MVM

Lower 

Mississippi 878.1 878.1 60 36.46335 -89.52262 18:54:03 11/9/2013 MVM

Lower 

Mississippi 877 877 70 36.44306 -89.53941 19:01:23 11/9/2013 MVM

Lower 

Mississippi 875.7 875.7 65 36.42903 -89.54624 19:07:34 11/9/2013 MVM

Lower 

Mississippi 873.7 873.7 31 36.41169 -89.53520 19:14:19 11/9/2013 MVM

Lower 

Mississippi 871 871 31 36.38832 -89.51319 19:28:05 11/9/2013 MVM

Lower 

Mississippi 871 SRR1.1AT 38 36.34924 -89.51604 19:24:23 11/9/2013 MVM

Lower 

Mississippi 871 SRR1.3B 28 36.34989 -89.51839 19:31:20 11/9/2013 MVM

Lower 

Mississippi 871 SRR1.5C 13 36.35050 -89.51938 19:34:44 11/9/2013 MVM

Lower 

Mississippi 870 870 20 36.35117 -89.52042 19:44:54 11/9/2013 MVM

Lower 

Mississippi 870 SRR3.1AT 23 36.33726 -89.52826 19:40:45 11/9/2013 MVM
MRG&P Report No. 7 126

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 870 SRR3.3B 21 36.33906 -89.53006 19:48:08 11/9/2013 MVM

Lower 

Mississippi 868.7 SRR5.1AT 38 36.34013 -89.53086 19:54:36 11/9/2013 MVM

Lower 

Mississippi 868.7 SRR5.3B 24 36.33484 -89.55342 20:00:06 11/9/2013 MVM

Lower 

Mississippi 868.7 SRR5.5C 5 36.33656 -89.55250 20:04:15 11/9/2013 MVM

Lower 

Mississippi 867.3 867.3T 27 36.33846 -89.55194 20:13:24 11/9/2013 MVM

Lower 

Mississippi 867.3 SRR7.1A 26 36.34116 -89.57674 20:09:49 11/9/2013 MVM

Lower 

Mississippi 867.3 SRR7.3B 26 36.34282 -89.57591 20:16:57 11/9/2013 MVM

Lower 

Mississippi 865.7 865.7 38 36.34492 -89.57477 20:25:46 11/9/2013 MVM

Lower 

Mississippi 864.5 864.5 22 36.34794 -89.60521 20:38:51 11/9/2013 MVM

Lower 

Mississippi 864.5 SRR9.3B 2 36.33256 -89.62164 20:42:13 11/9/2013 MVM

Lower 

Mississippi 864.5 SRR9.5C 57 36.33241 -89.61861 20:33:56 11/9/2013 MVM

Lower 

Mississippi 862.7 862.7B 20 36.33177 -89.61710 21:08:42 11/9/2013 MVM

Lower 

Mississippi 862.7 862.7C 50 36.30626 -89.61031 21:04:52 11/9/2013 MVM

Lower 

Mississippi 862.7 862.7D 65 36.30660 -89.60954 21:00:56 11/9/2013 MVM

Lower 

Mississippi 862.7 862.7ET 85 36.30724 -89.60865 20:57:07 11/9/2013 MVM

Lower 

Mississippi 860.4 860.4 25 36.30777 -89.60777 21:20:09 11/9/2013 MVM

Lower 

Mississippi 860.4 SRR11.1AT 33 36.28617 -89.57718 21:23:36 11/9/2013 MVM

Lower 

Mississippi 860.4 SRR11.3B 30 36.28778 -89.57520 21:15:51 11/9/2013 MVM

Lower 

Mississippi 858.6 858.6 48 36.28945 -89.57377 21:30:28 11/9/2013 MVM

Lower 

Mississippi 857.2 SRR13.1AT 100 36.26720 -89.55690 21:38:46 11/9/2013 MVM

Lower 

Mississippi 857.2 SRR13.1B 63 36.24737 -89.56734 21:42:47 11/9/2013 MVM

Lower 

Mississippi 857.2 SRR13.5C 29 36.24795 -89.56810 21:46:38 11/9/2013 MVM
MRG&P Report No. 7 127

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 857.2 SRR13.7D 2 36.24908 -89.56804 21:49:57 11/9/2013 MVM

Lower 

Mississippi 857 857 63 36.24996 -89.56867 21:59:06 11/9/2013 MVM

Lower 

Mississippi 856 856 57 36.24469 -89.57164 14:31:42 11/10/2013 MVM

Lower 

Mississippi 855 855 52 36.23909 -89.58829 14:37:26 11/10/2013 MVM

Lower 

Mississippi 853.5 SRR15.1AT 30 36.23751 -89.60499 14:42:55 11/10/2013 MVM

Lower 

Mississippi 853.5 SRR15.3B 26 36.24154 -89.63155 14:46:21 11/10/2013 MVM

Lower 

Mississippi 853.5 SRR15.5C 20 36.24344 -89.63034 14:50:05 11/10/2013 MVM

Lower 

Mississippi 853 853 29 36.24628 -89.62926 14:56:47 11/10/2013 MVM

Lower 

Mississippi 851.3 SRR17.1A 10 36.24678 -89.63796 15:10:38 11/10/2013 MVM

Lower 

Mississippi 851.3 SRR17.3B 38 36.25131 -89.66473 15:07:08 11/10/2013 MVM

Lower 

Mississippi 851.3 SRR17.5CT 50 36.24934 -89.66491 15:03:03 11/10/2013 MVM

Lower 

Mississippi 851 851 45 36.24626 -89.66493 15:23:27 11/10/2013 MVM

Lower 

Mississippi 849.9 SRR19.3B 3 36.25060 -89.67193 15:38:09 11/10/2013 MVM

Lower 

Mississippi 849.9 SRR19.5CT 57 36.23475 -89.69194 15:34:13 11/10/2013 MVM

Lower 

Mississippi 849.9 SRR19.7D 27 36.23365 -89.68916 15:30:09 11/10/2013 MVM

Lower 

Mississippi 849.4 849.4 50 36.23335 -89.68663 15:45:00 11/10/2013 MVM

Lower 

Mississippi 848.2 848.2 62 36.22655 -89.69024 15:50:16 11/10/2013 MVM

Lower 

Mississippi 846.5 846.5A 48 36.21231 -89.67571 15:57:19 11/10/2013 MVM

Lower 

Mississippi 846.5 846.5B 35 36.19915 -89.64887 16:00:26 11/10/2013 MVM

Lower 

Mississippi 846.5 846.5C 25 36.19815 -89.65011 16:03:51 11/10/2013 MVM

Lower 

Mississippi 846.5 846.5D 26 36.19720 -89.65126 16:07:08 11/10/2013 MVM

Lower 

Mississippi 846.5 846.5E 21 36.19653 -89.65217 16:10:07 11/10/2013 MVM
MRG&P Report No. 7 128

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 844.6 844.6 28 36.19592 -89.65266 16:17:42 11/10/2013 MVM

Lower 

Mississippi 842.8 842.5 24 36.18378 -89.62111 16:31:06 11/10/2013 MVM

Lower 

Mississippi 840.1 840.1 32 36.16075 -89.59248 16:40:29 11/10/2013 MVM

Lower 

Mississippi 835.5 835.5 45 36.12223 -89.59030 16:49:45 11/10/2013 MVM

Lower 

Mississippi 833.6 833.6 42 36.09811 -89.66985 16:56:19 11/10/2013 MVM

Lower 

Mississippi 831 831 45 36.07361 -89.68196 17:04:16 11/10/2013 MVM

Lower 

Mississippi 828 828 32 36.03544 -89.68166 17:43:52 11/10/2013 MVM

Lower 

Mississippi 825.4 825.4 50 36.00104 -89.71615 17:50:25 11/10/2013 MVM

Lower 

Mississippi 822 822 48 35.96402 -89.72038 18:00:50 11/10/2013 MVM

Lower 

Mississippi 818.4 818.4AT 37 35.93786 -89.66728 18:10:07 11/10/2013 MVM

Lower 

Mississippi 818.4 818.4B 36 35.89341 -89.64171 18:13:15 11/10/2013 MVM

Lower 

Mississippi 818.4 818.4C 32 35.89355 -89.64261 18:16:48 11/10/2013 MVM

Lower 

Mississippi 818.4 818.4D 30 35.89364 -89.64375 18:20:21 11/10/2013 MVM

Lower 

Mississippi 818.4 818.4E 18 35.89389 -89.64500 18:23:19 11/10/2013 MVM

Lower 

Mississippi 816.2 816.2 44 35.89426 -89.64672 18:30:25 11/10/2013 MVM

Lower 

Mississippi 814.8 814.8 51 35.87482 -89.67278 18:41:31 11/10/2013 MVM

Lower 

Mississippi 810.6 810.6 96 35.88952 -89.69394 18:54:40 11/10/2013 MVM

Lower 

Mississippi 807.9 807.9 30 35.90752 -89.71495 19:13:43 11/10/2013 MVM

Lower 

Mississippi 804.5 804.5 37 35.90085 -89.75590 19:23:58 11/10/2013 MVM

Lower 

Mississippi 803 813 41 35.86200 -89.77120 18:47:09 11/10/2013 MVM

Lower 

Mississippi 802.1 802.1 60 35.84317 -89.71171 19:38:56 11/10/2013 MVM

Lower 

Mississippi 799 799 52 35.81051 -89.71137 19:46:21 11/10/2013 MVM
MRG&P Report No. 7 129

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 797.5 797.5 43 35.79281 -89.75606 19:52:23 11/10/2013 MVM

Lower 

Mississippi 795.5 795.5AT 43 35.77924 -89.77645 20:20:07 11/10/2013 MVM

Lower 

Mississippi 795.5 795.5B 28 35.75584 -89.80226 20:01:20 11/10/2013 MVM

Lower 

Mississippi 795.5 795.5C 24 35.75758 -89.80339 20:04:56 11/10/2013 MVM

Lower 

Mississippi 795.5 795.5D 17 35.75889 -89.80452 20:08:03 11/10/2013 MVM

Lower 

Mississippi 795.5 795.5E 21 35.76076 -89.80613 20:12:32 11/10/2013 MVM

Lower 

Mississippi 792.5 792.5T 30 35.75497 -89.80205 9:01:12 11/10/2013 MVM

Lower 

Mississippi 789.5 789.5T 30 35.74043 -89.85185 9:14:43 11/10/2013 MVM

Lower 

Mississippi 788 788.0T 30 35.73523 -89.90580 9:22:12 11/10/2013 MVM

Lower 

Mississippi 786.2 786.2T 40 35.72769 -89.93141 9:31:37 11/10/2013 MVM

Lower 

Mississippi 783.4 783.4T 30 35.70078 -89.94590 9:40:10 11/10/2013 MVM

Lower 

Mississippi 780.2 780.2T 42 35.66104 -89.93085 9:50:42 11/10/2013 MVM

Lower 

Mississippi 778.2 778.2T 55 35.64098 -89.87763 9:58:00 11/10/2013 MVM

Lower 

Mississippi 777 777.0T 44 35.61786 -89.88756 10:05:16 11/10/2013 MVM

Lower 

Mississippi 775.2 775.2T 55 35.60549 -89.90311 10:12:29 11/10/2013 MVM

Lower 

Mississippi 773.4 773.4A 16 35.57875 -89.90696 10:23:30 11/10/2013 MVM

Lower 

Mississippi 773.4 773.4B 18 35.55337 -89.90245 10:27:15 11/10/2013 MVM

Lower 

Mississippi 773.4 773.4C 25 35.55322 -89.90386 10:31:00 11/10/2013 MVM

Lower 

Mississippi 773.4 773.4DT 26 35.55298 -89.90535 10:38:22 11/10/2013 MVM

Lower 

Mississippi 773.4 773.4E 22 35.55278 -89.90683 10:41:20 11/10/2013 MVM

Lower

Mississippi 771.9 771.9T 33 35.55264 -89.90827 10:47:51 11/10/2013 MVM

Lower 

Mississippi 770.3 770.3T 35 35.53134 -89.90252 10:54:38 11/10/2013 MVM
MRG&P Report No. 7 130

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 768.8 768.8T 50 35.51236 -89.91336 11:02:20 11/10/2013 MVM

Lower 

Mississippi 766.8 766.8T 44 35.51806 -89.94077 11:09:56 11/10/2013 MVM

Lower 

Mississippi 764.8 764.8T 45 35.52879 -89.97561 11:23:33 11/10/2013 MVM

Lower 

Mississippi 762.2 762.2T (armored) 41 35.51249 -90.00707 11:45:25 11/10/2013 MVM

Lower 

Mississippi 760.1 760.1T 40 35.47659 -90.00397 11:58:31 11/10/2013 MVM

Lower 

Mississippi 757.8 757.8T 40 35.44689 -89.99330 12:06:08 11/10/2013 MVM

Lower 

Mississippi 755.7 755.7T 23 35.42184 -90.01811 12:14:04 11/10/2013 MVM

Lower 

Mississippi 754.3 754.3ET 41 35.40951 -90.05196 12:21:29 11/10/2013 MVM

Lower 

Mississippi 752.7 752.7T 26 35.39507 -90.07092 13:31:26 11/10/2013 MVM

Lower 

Mississippi 750.2 750.2T 51 35.39410 -90.06855 13:40:46 11/10/2013 MVM

Lower 

Mississippi 746.5 746.5T 29 35.39323 -90.06644 13:51:01 11/10/2013 MVM

Lower 

Mississippi 744.7 744.7T 25 35.39219 -90.06429 13:58:45 11/10/2013 MVM

Lower 

Mississippi 742 742.0T 26 35.39100 -90.06193 14:06:22 11/10/2013 MVM

Lower 

Mississippi 740.6 740.6T 23 35.37297 -90.08046 14:12:10 11/10/2013 MVM

Lower 

Mississippi 737.4 737.4T 24 35.33968 -90.09852 14:23:25 11/10/2013 MVM

Lower 

Mississippi 734.6 734.6T 42 35.28764 -90.10932 14:30:11 11/10/2013 MVM

Lower 

Mississippi 732.7 732.7T 33 35.26181 -90.10204 14:36:42 11/10/2013 MVM

Lower 

Mississippi 730.3 730.3B 3 35.22727 -90.07931 14:49:36 11/10/2013 MVM

Lower 

Mississippi 730.3 730.3C 21 35.20960 -90.06759 14:53:43 11/10/2013 MVM

Lower 

Mississippi 730.3 730.3D 37 35.16370 -90.06216 15:00:51 11/10/2013 MVM

Lower 

Mississippi 730.3 730.3ET 80 35.12686 -90.07767 15:04:31 11/10/2013 MVM

Lower 

Mississippi 727.7 727.7T 57 35.11956 -90.10723 15:25:38 11/10/2013 MVM
MRG&P Report No. 7 131

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 725 725.0T 36 35.12988 -90.14616 8:35:02 11/11/2013 MVM

Lower 

Mississippi 724.3 754.3A 0 35.13173 -90.14600 13:14:06 11/10/2013 MVM

Lower 

Mississippi 724.3 754.3B 0 35.13325 -90.14615 13:13:53 11/10/2013 MVM

Lower 

Mississippi 724.3 754.3C 0 35.13469 -90.14600 13:13:37 11/10/2013 MVM

Lower 

Mississippi 724.3 754.3D 0 35.10730 -90.17688 13:13:07 11/10/2013 MVM

Lower 

Mississippi 722.3 722.3T 25 35.06809 -90.17778 8:41:44 11/11/2013 MVM

Lower 

Mississippi 719.5 719.5T 25 35.03452 -90.19980 8:49:41 11/11/2013 MVM

Lower 

Mississippi 716.8 716.8T 38 35.01938 -90.24403 8:57:18 11/11/2013 MVM

Lower 

Mississippi 714.3 714.3T 27 35.01524 -90.29085 9:04:38 11/11/2013 MVM

Lower 

Mississippi 712.9 712.9T 35 34.98225 -90.29931 9:09:33 11/11/2013 MVM

Lower 

Mississippi 709.9 709.9T 30 34.96807 -90.28200 9:16:57 11/11/2013 MVM

Lower 

Mississippi 707.2 707.2T 35 34.94060 -90.24351 9:23:36 11/11/2013 MVM

Lower 

Mississippi 705 705.0A 17 34.90285 -90.24838 9:30:47 11/11/2013 MVM

Lower 

Mississippi 705 705.0BT 32 34.88318 -90.27917 9:33:57 11/11/2013 MVM

Lower 

Mississippi 705 705.0C 21 34.88482 -90.27974 9:47:36 11/11/2013 MVM

Lower 

Mississippi 705 705.0D 10 34.88787 -90.28047 9:39:56 11/11/2013 MVM

Lower 

Mississippi 705 705.0E 14 34.88964 -90.28080 9:42:59 11/11/2013 MVM

Lower 

Mississippi 702.9 702.9 taken from 

land 39 34.88634 -90.27983 10:10:26 11/11/2013 MVM

Lower 

Mississippi 700.3 700.3 1 34.87167 -90.31271 10:23:03 11/11/2013 MVM

Lower 

Mississippi 697.5 697.5 (willow trees) 39 34.85586 -90.35367 10:37:25 11/11/2013 MVM

Lower 

Mississippi 695.6 695.6T 25 34.83461 -90.39581 10:44:24 11/11/2013 MVM

Lower 

Mississippi 694 694 2 34.82425 -90.42758 10:52:31 11/11/2013 MVM
MRG&P Report No. 7 132

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 692 692.0T 25 34.81762 -90.45317 11:02:42 11/11/2013 MVM

Lower 

Mississippi 689.9 689.9T 34 34.79701 -90.47433 11:08:44 11/11/2013 MVM

Lower 

Mississippi 687.6 687.6T 39 34.76899 -90.46045 11:14:52 11/11/2013 MVM

Lower 

Mississippi 683.4 683.4T 22 34.73835 -90.44993 11:24:24 11/11/2013 MVM

Lower 

Mississippi 681.7 681.7A 17 34.73017 -90.51714 11:29:43 11/11/2013 MVM

Lower 

Mississippi 681.7 681.7B 12 34.73745 -90.54325 11:32:46 11/11/2013 MVM

Lower 

Mississippi 681.7 681.7C 17 34.73857 -90.54353 11:36:46 11/11/2013 MVM

Lower 

Mississippi 681.7 681.7D 20 34.74002 -90.54308 11:48:05 11/11/2013 MVM

Lower 

Mississippi 681.7 681.7ET 39 34.74361 -90.54303 11:44:43 11/11/2013 MVM

Lower 

Mississippi 679.4 679.4T 61 34.74156 -90.54322 11:56:02 11/11/2013 MVM

Lower 

Mississippi 677.5 677.5T 23 34.72369 -90.56776 12:37:06 11/11/2013 MVM

Lower 

Mississippi 674.5 674.5T 55 34.69558 -90.56958 12:44:09 11/11/2013 MVM

Lower 

Mississippi 672.1 672.1T 28 34.65490 -90.58177 12:52:06 11/11/2013 MVM

Lower 

Mississippi 669.9 669.9A 30 34.62068 -90.59032 12:58:48 11/11/2013 MVM

Lower 

Mississippi 669.9 669.9B 34 34.59299 -90.57048 13:02:48 11/11/2013 MVM

Lower 

Mississippi 669.9 669.9C 29 34.59245 -90.57194 13:06:20 11/11/2013 MVM

Lower 

Mississippi 669.9 669.9DT 40 34.59211 -90.57321 13:13:36 11/11/2013 MVM

Lower 

Mississippi 666.8 666.8T 8 34.59186 -90.57401 13:24:19 11/11/2013 MVM

Lower 

Mississippi 664.9 664.9T 30 34.55623 -90.54548 13:32:03 11/11/2013 MVM

Lower 

Mississippi 663.9 663.9T 37 34.53060 -90.55452 13:37:16 11/11/2013 MVM

Lower 

Mississippi 662.4 662.4T 47 34.52360 -90.57001 13:43:44 11/11/2013 MVM

Lower 

Mississippi 660.2 660 2B 15 34.50596 -90.58407 15:08:27 11/11/2013 MVM
MRG&P Report No. 7 133

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 660.2 660.2A 3 34.47453 -90.59220 15:12:24 11/11/2013 MVM

Lower 

Mississippi 660.2 660.2C 12 34.47486 -90.59063 15:05:19 11/11/2013 MVM

Lower 

Mississippi 660.2 660.2D 32 34.47534 -90.58864 15:02:04 11/11/2013 MVM

Lower 

Mississippi 660.2 660.2ET 50 34.47552 -90.58758 14:57:49 11/11/2013 MVM

Lower 

Mississippi 658.1 658.1 31 34.47562 -90.58695 15:21:39 11/11/2013 MVM

Lower 

Mississippi 656.5 656.5 52 34.44516 -90.58315 15:29:24 11/11/2013 MVM

Lower 

Mississippi 654.6 654.6 56 34.41524 -90.58258 15:36:47 11/11/2013 MVM

Lower 

Mississippi 653 653.0A 35 34.39795 -90.59758 15:45:51 11/11/2013 MVM

Lower 

Mississippi 653 653.0B 26 34.38583 -90.62211 15:50:08 11/11/2013 MVM

Lower 

Mississippi 653 653.0CT 23 34.38781 -90.62290 15:53:23 11/11/2013 MVM

Lower 

Mississippi 653 653.0D 20 34.38925 -90.62347 15:56:07 11/11/2013 MVM

Lower 

Mississippi 653 653.0E 15 34.39063 -90.62396 15:59:35 11/11/2013 MVM

Lower 

Mississippi 650.2 650.2 55 34.39223 -90.62458 16:06:58 11/11/2013 MVM

Lower 

Mississippi 647.6 647.6 45 34.37649 -90.66993 16:14:20 11/11/2013 MVM

Lower 

Mississippi 645.7 645.7 48 34.35978 -90.71107 16:19:23 11/11/2013 MVM

Lower 

Mississippi 643.4 643.4 85 34.36693 -90.74336 16:27:29 11/11/2013 MVM

Lower 

Mississippi 641 641 40 34.35052 -90.77007 16:34:36 11/11/2013 MVM

Lower 

Mississippi 640 640 54 34.32223 -90.74212 16:40:04 11/11/2013 MVM

Lower 

Mississippi 637.2 637.2AT 40 34.30773 -90.73514 16:47:48 11/11/2013 MVM

Lower 

Mississippi 637.2 637.2B 21 34.26976 -90.76439 16:51:42 11/11/2013 MVM

Lower 

Mississippi 637.2 637.2C 14 34.27198 -90.76460 16:54:08 11/11/2013 MVM

Lower 

Mississippi 637.2 637.2D 8 34.27379 -90.76513 16:58:48 11/11/2013 MVM
MRG&P Report No. 7 134

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 637.2 637.2E 2 34.27476 -90.76523 17:01:44 11/11/2013 MVM

Lower 

Mississippi 634.1 634.1 41 34.27493 -90.76520 17:11:31 11/11/2013 MVM

Lower 

Mississippi 632.1 632.1 54 34.28122 -90.82439 17:17:57 11/11/2013 MVM

Lower 

Mississippi 629.3 629.3 42 34.25207 -90.83706 17:25:35 11/11/2013 MVM

Lower 

Mississippi 625.5 625.5 33 34.21290 -90.84170 17:31:09 11/11/2013 MVM

Lower 

Mississippi 625.5 625.5 33 34.19788 -90.85643 17:39:01 11/11/2013 MVM

Lower 

Mississippi 623.1 623.1 27 34.18012 -90.89656 17:45:35 11/11/2013 MVM

Lower 

Mississippi 620.8 620.8 27 34.15665 -90.92356 18:30:48 11/11/2013 MVM

Lower 

Mississippi 617.7 617.7 55 34.13494 -90.95921 18:40:40 11/11/2013 MVM

Lower 

Mississippi 614.7 614.7 44 34.09747 -90.92633 18:48:00 11/11/2013 MVM

Lower 

Mississippi 612.5 612.5AT 44 34.06294 -90.89299 18:55:01 11/11/2013 MVM

Lower 

Mississippi 612.5 612.5B 20 34.02738 -90.89081 18:59:37 11/11/2013 MVM

Lower 

Mississippi 612.5 612.5C 1.6 34.02839 -90.89194 19:01:57 11/11/2013 MVM

Lower 

Mississippi 612.5 612.5D 0 34.02910 -90.89276 19:15:08 11/11/2013 MVM

Lower 

Mississippi 610 610 26 34.02646 -90.90424 19:23:07 11/11/2013 MVM

Lower 

Mississippi 607.3 607.3 30 34.02238 -90.93726 19:32:11 11/11/2013 MVM

Lower 

Mississippi 605.9 605.9 43 34.02162 -90.98219 19:37:43 11/11/2013 MVM

Lower 

Mississippi 604.2 304.2T 42 34.01267 -91.00216 10:04:55 11/13/2013 MVN

Lower 

Mississippi 603.5 603.5 54 33.98735 -91.03804 19:44:26 11/11/2013 MVM

Lower 

Mississippi 601 601 76 33.98181 -91.07878 19:51:09 11/11/2013 MVM

Lower 

Mississippi 599.4 599.4 80 33.95647 -91.08355 20:12:51 11/11/2013 MVM

Lower 

Mississippi 598.2 598.2A 37 33.95429 -91.06580 20:19:12 11/11/2013 MVM
MRG&P Report No. 7 135

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 598.2 598.2B 49 33.95355 -91.06504 20:21:41 11/11/2013 MVM

Lower 

Mississippi 598.2 598.2C 53 33.95221 -91.06612 20:29:03 11/11/2013 MVM

Lower 

Mississippi 598.2 598.2D 65 33.95157 -91.06638 20:34:00 11/11/2013 MVM

Lower 

Mississippi 598.2 598.2ET 71 33.95094 -91.06675 20:37:21 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6AT 31 33.93731 -91.01279 20:52:28 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6B 24 33.93689 -91.01485 20:56:26 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6C 21 33.93643 -91.01738 21:00:20 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6D 12 33.93597 -91.01865 21:02:57 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6E 0 33.93471 -91.02092 21:06:55 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6E1 GRAVEL 0 33.93448 -91.02157 21:12:13 11/11/2013 MVM

Lower 

Mississippi 595.6 595.6E2 SAND 0 33.93451 -91.02146 21:14:46 11/11/2013 MVM

Lower 

Mississippi 592.1 592.1 33 33.89186 -91.04369 21:29:54 11/11/2013 MVK

Lower 

Mississippi 590.3 590.3A 8 33.87722 -91.06949 21:50:38 11/11/2013 MVK

Lower 

Mississippi 590.3 590.3B 16 33.87596 -91.06841 21:47:42 11/11/2013 MVK

Lower 

Mississippi 590.3 590.3C 32 33.87426 -91.06765 21:44:27 11/11/2013 MVK

Lower 

Mississippi 590.3 590.3DT 35 33.87354 -91.06585 21:40:15 11/11/2013 MVK

Lower 

Mississippi 590.3 590.3E 25 33.87220 -91.06449 21:36:44 11/11/2013 MVK

Lower 

Mississippi 588.5 588.5 66 33.84453 -91.07043 14:34:24 11/12/2013 MVK

Lower 

Mississippi 585.2 585.2 35 33.80582 -91.04162 14:45:55 11/12/2013 MVK

Lower 

Mississippi 583.8 583.8 46 33.78089 -91.04645 14:52:50 11/12/2013 MVK

Lower 

Mississippi 581.3 581.3 57 33.77375 -91.08859 15:03:57 11/12/2013 MVK

Lower 

Mississippi 579.6 ARKA 3 33.83867 -91.13620 15:40:37 11/12/2013 MVK
MRG&P Report No. 7 136

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 579.6 ARKB 6 33.83864 -91.13719 15:43:01 11/12/2013 MVK

Lower 

Mississippi 579.6 ARKCT 10 33.83840 -91.13791 15:45:00 11/12/2013 MVK

Lower 

Mississippi 579.6 ARKD 7.5 33.83875 -91.13910 15:47:24 11/12/2013 MVK

Lower 

Mississippi 579.4 579.4 47 33.76839 -91.12039 16:03:46 11/12/2013 MVK

Lower 

Mississippi 576.5 576.5 53 33.73319 -91.14786 16:12:34 11/12/2013 MVK

Lower 

Mississippi 575 575 59 33.71230 -91.15287 16:19:16 11/12/2013 MVK

Lower 

Mississippi 572 572.0AT 62 33.70420 -91.19937 16:40:52 11/12/2013 MVK

Lower 

Mississippi 572 572.0B 50 33.70321 -91.19915 16:36:27 11/12/2013 MVK

Lower 

Mississippi 572 572.0C 42 33.70160 -91.19965 16:33:21 11/12/2013 MVK

Lower 

Mississippi 572 572.0D 40 33.70058 -91.19981 16:28:55 11/12/2013 MVK

Lower 

Mississippi 570 570 53 33.68117 -91.22985 17:12:25 11/12/2013 MVK

Lower 

Mississippi 568.7 568.7B1 25 33.66518 -91.22464 17:32:56 11/12/2013 MVK

Lower 

Mississippi 568.7 568.7B2 25 33.66539 -91.22378 17:36:11 11/12/2013 MVK

Lower 

Mississippi 568.7 568.7C 45 33.66555 -91.22311 17:28:10 11/12/2013 MVK

Lower 

Mississippi 568.7 568.7D 55 33.66645 -91.22211 17:23:51 11/12/2013 MVK

Lower 

Mississippi 568.7 568.7ET 70 33.66713 -91.22066 17:19:18 11/12/2013 MVK

Lower 

Mississippi 566 566.0A 21 33.65450 -91.17924 17:45:25 11/12/2013 MVK

Lower 

Mississippi 566 566.0B 53 33.65311 -91.17976 17:48:42 11/12/2013 MVK

Lower 

Mississippi 566 566.0CT 55 33.65162 -91.18060 17:56:43 11/12/2013 MVK

Lower 

Mississippi 566 566.0D 46 33.64993 -91.18211 18:00:57 11/12/2013 MVK

Lower 

Mississippi 565.2 565.2 64 33.64614 -91.16615 18:13:36 11/12/2013 MVK

Lower 

Mississippi 562.8 562.8 32 33.62463 -91.13421 18:21:15 11/12/2013 MVK
MRG&P Report No. 7 137

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 559.8 559.8 60 33.60353 -91.13001 18:32:17 11/12/2013 MVK

Lower 

Mississippi 556.8 556.8 53 33.58454 -91.14239 18:42:23 11/12/2013 MVK

Lower 

Mississippi 554.1 554.1 72 33.56808 -91.19131 18:50:05 11/12/2013 MVK

Lower 

Mississippi 551.8 551.8A 16 33.56162 -91.23408 19:13:29 11/12/2013 MVK

Lower 

Mississippi 551.8 551.8B 34 33.53067 -91.22131 19:09:59 11/12/2013 MVK

Lower 

Mississippi 551.8 551.8C 49 33.53138 -91.22001 19:06:03 11/12/2013 MVK

Lower 

Mississippi 551.8 551.8D 54 33.53226 -91.21882 19:01:34 11/12/2013 MVK

Lower 

Mississippi 551.8 551.8ET 60 33.53299 -91.21766 18:57:26 11/12/2013 MVK

Lower 

Mississippi 548.8 548.8 46 33.53384 -91.21660 19:25:37 11/12/2013 MVK

Lower 

Mississippi 546.8 546.8 34 33.50256 -91.17411 19:31:30 11/12/2013 MVK

Lower 

Mississippi 545 545 28 33.48896 -91.14397 19:38:43 11/12/2013 MVK

Lower 

Mississippi 542.9 542.9 31 33.46961 -91.12224 19:45:01 11/12/2013 MVK

Lower 

Mississippi 541.5 541.5 23 33.44192 -91.11384 19:50:45 11/12/2013 MVK

Lower 

Mississippi 538.2 538.2 24 33.41868 -91.11455 19:58:46 11/12/2013 MVK

Lower 

Mississippi 535.4 535.4 23 33.37444 -91.11150 20:06:32 11/12/2013 MVK

Lower 

Mississippi 532.9 532.9A 0 33.34658 -91.14961 20:34:34 11/12/2013 MVK

Lower 

Mississippi 532.9 532.9B 0 33.30993 -91.18167 20:34:17 11/12/2013 MVK

Lower 

Mississippi 532.9 532.9C 14 33.31057 -91.17792 20:20:36 11/12/2013 MVK

Lower 

Mississippi 532.9 532.9DT 58 33.31186 -91.17622 20:14:49 11/12/2013 MVK

Lower 

Mississippi 531.3 531.3A 42 33.31284 -91.17447 20:49:53 11/12/2013 MVK

Lower 

Mississippi 531.3 531.3B 53 33.29022 -91.15914 20:45:51 11/12/2013 MVK

Lower 

Mississippi 531.3 531.3CT 69 33.29138 -91.15728 20:41:28 11/12/2013 MVK
MRG&P Report No. 7 138

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 527.4 527.4 32 33.29205 -91.15561 20:57:38 11/12/2013 MVK

Lower 

Mississippi 525.3 525.3A 28 33.24816 -91.12145 21:16:35 11/12/2013 MVK

Lower 

Mississippi 525.3 525.3BT 24 33.21917 -91.10379 21:12:30 11/12/2013 MVK

Lower 

Mississippi 525.3 525.3C 19 33.21992 -91.10266 21:09:49 11/12/2013 MVK

Lower 

Mississippi 525.3 525.3D 17 33.22060 -91.10102 21:06:55 11/12/2013 MVK

Lower 

Mississippi 525.3 525.3E 42 33.22141 -91.09939 21:04:02 11/12/2013 MVK

Lower 

Mississippi 522.3 522.5 41 33.22255 -91.09752 21:23:35 11/12/2013 MVK

Lower 

Mississippi 519.1 519.1 24 33.18526 -91.08125 21:31:53 11/12/2013 MVK

Lower 

Mississippi 518.1 518.1 40 33.13572 -91.08659 21:36:11 11/12/2013 MVK

Lower 

Mississippi 516 516 64 33.12299 -91.09727 21:41:45 11/12/2013 MVK

Lower 

Mississippi 514.1 514.1 55 33.11343 -91.13149 21:47:20 11/12/2013 MVK

Lower 

Mississippi 511.5 511.5 73 33.10419 -91.16191 21:53:49 11/12/2013 MVK

Lower 

Mississippi 508.6 508.6 35 33.06724 -91.16471 22:01:27 11/12/2013 MVK

Lower 

Mississippi 507 507 52 33.02713 -91.14578 22:06:16 11/12/2013 MVK

Lower 

Mississippi 504.5 504.5 43 33.00407 -91.15584 22:14:09 11/12/2013 MVK

Lower 

Mississippi 502.4 502.4A 6 32.96593 -91.16044 22:39:04 11/12/2013 MVK

Lower 

Mississippi 502.4 502.4B 42 32.95484 -91.12638 22:35:49 11/12/2013 MVK

Lower 

Mississippi 502.4 502.4C 60 32.95558 -91.12599 22:31:45 11/12/2013 MVK

Lower 

Mississippi 502.4 502.4D 66 32.95641 -91.12577 22:27:47 11/12/2013 MVK

Lower 

Mississippi 502.4 502.4ET 69 32.95713 -91.12569 22:23:59 11/12/2013 MVK

Lower 

Mississippi 497.3 497.3T 57 32.95793 -91.12580 8:45:14 11/12/2013 MVK

Lower 

Mississippi 495.1 495.1T 21 32.91597 -91.06382 8:53:29 11/12/2013 MVK
MRG&P Report No. 7 139

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 491.8 491.8T 40 32.88556 -91.07344 9:03:34 11/12/2013 MVK

Lower 

Mississippi 490 490.0T 25 32.85439 -91.11873 9:08:56 11/12/2013 MVK

Lower 

Mississippi 488.2 488.2T 40 32.83634 -91.14125 9:14:48 11/12/2013 MVK

Lower 

Mississippi 485.5 485.5T 27 32.81095 -91.15265 9:22:47 11/12/2013 MVK

Lower 

Mississippi 482.8 482.8T 25 32.77208 -91.15730 9:32:05 11/12/2013 MVK

Lower 

Mississippi 480.6 480.6T 61 32.73531 -91.14406 9:40:30 11/12/2013 MVK

Lower 

Mississippi 478.6 478.6T 53 32.73436 -91.10876 9:50:34 11/12/2013 MVK

Lower 

Mississippi 476.6 476.6CT 65 32.73461 -91.07489 13:35:23 11/12/2013 MVK

Lower 

Mississippi 476.6 476.6D 60 32.71608 -91.05419 13:29:10 11/12/2013 MVK

Lower 

Mississippi 476.6 476.6E 3 32.71558 -91.05204 11:09:43 11/12/2013 MVK

Lower 

Mississippi 469.6 469.6T 41 32.71565 -91.05144 13:51:41 11/12/2013 MVK

Lower 

Mississippi 468.8 468.8T 32 32.65567 -91.14412 13:59:12 11/12/2013 MVK

Lower 

Mississippi 466.7 466.7T 40 32.64369 -91.15217 14:05:34 11/12/2013 MVK

Lower 

Mississippi 465.2 465.2T 42 32.61334 -91.15090 14:12:02 11/12/2013 MVK

Lower 

Mississippi 462 462.0T 30 32.59340 -91.13980 14:24:30 11/12/2013 MVK

Lower 

Mississippi 460.8 460.8T 45 32.56124 -91.10067 14:30:44 11/12/2013 MVK

Lower 

Mississippi 458.6 458.6T 58 32.54355 -91.09648 14:39:51 11/12/2013 MVK

Lower 

Mississippi 456.8 456.8T 57 32.51335 -91.10802 14:46:55 11/12/2013 MVK

Lower 

Mississippi 454.8 454.8T 77 32.48942 -91.11751 14:54:23 11/12/2013 MVK

Lower 

Mississippi 452.4 452.4A 9 32.46402 -91.10240 15:02:38 11/12/2013 MVK

Lower 

Mississippi 452.4 452.4B 22 32.44675 -91.06908 15:06:05 11/12/2013 MVK

Lower 

Mississippi 452.4 452.4C 32 32.44539 -91.06967 15:10:14 11/12/2013 MVK
MRG&P Report No. 7 140

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 452.4 452.4DT 55 32.44420 -91.07035 15:14:09 11/12/2013 MVK

Lower 

Mississippi 449.2 449.2T 29 32.44285 -91.07143 15:27:54 11/12/2013 MVK

Lower 

Mississippi 446.8 446.8T 36 32.42675 -91.01898 15:35:15 11/12/2013 MVK

Lower 

Mississippi 445.2 445.2T 59 32.40323 -90.98958 15:41:50 11/12/2013 MVK

Lower 

Mississippi 442.8 442.8T 73 32.38083 -90.99898 15:50:55 11/12/2013 MVK

Lower 

Mississippi 439.8 439.8T 23 32.35165 -90.99235 15:59:37 11/12/2013 MVK

Lower 

Mississippi 434.9 434.9T 67 32.34728 -90.94220 16:10:27 11/12/2013 MVK

Lower 

Mississippi 433.8 433.8BT 38 32.30396 -90.91339 16:18:07 11/12/2013 MVK

Lower 

Mississippi 433.8 433.8D 22 32.29227 -90.92735 16:25:40 11/12/2013 MVK

Lower 

Mississippi 433.8 433.8E 9 32.29355 -90.92784 16:28:58 11/12/2013 MVK

Lower 

Mississippi 433.8 433.8T 23 32.29441 -90.92948 16:22:07 11/12/2013 MVK

Lower 

Mississippi 432 432.0T 23 32.29529 -90.93143 16:33:59 11/12/2013 MVK

Lower 

Mississippi 429.3 429.3T 54 32.27608 -90.95104 16:40:36 11/12/2013 MVK

Lower 

Mississippi 427.5 427.5A 1 32.24558 -90.98108 16:47:29 11/12/2013 MVK

Lower 

Mississippi 427.5 427.5B 32 32.22041 -90.98114 16:53:10 11/12/2013 MVK

Lower 

Mississippi 427.5 427.5C 33 32.22043 -90.98233 16:54:54 11/12/2013 MVK

Lower 

Mississippi 427.5 427.5D 39 32.22051 -90.98317 16:57:47 11/12/2013 MVK

Lower 

Mississippi 427.5 427.5ET 50 32.22018 -90.98413 17:00:41 11/12/2013 MVK

Lower 

Mississippi 425.6 425.6 46 32.22010 -90.98455 13:47:00 11/13/2013 MVK

Lower 

Mississippi 424 424 29 32.19508 -90.99269 13:55:17 11/13/2013 MVK

Lower 

Mississippi 422.3 422.3 44 32.17133 -91.00172 14:02:17 11/13/2013 MVK

Lower 

Mississippi 420.1 420.1 60 32.14612 -91.00431 14:10:03 11/13/2013 MVK
MRG&P Report No. 7 141

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 418.3 418.3 73 32.11987 -91.02430 14:19:46 11/13/2013 MVK

Lower 

Mississippi 415 415 67 32.12459 -91.05525 14:29:33 11/13/2013 MVK

Lower 

Mississippi 413.3 413.3 85 32.13212 -91.10196 14:38:27 11/13/2013 MVK

Lower 

Mississippi 411.5 411.5 40 32.10980 -91.10525 14:47:17 11/13/2013 MVK

Lower 

Mississippi 409.5 409.5 27 32.09083 -91.08777 14:54:18 11/13/2013 MVK

Lower 

Mississippi 408.7 408.7AT 22 32.07312 -91.06226 15:00:51 11/13/2013 MVK

Lower 

Mississippi 408.7 408.7B 53 32.05343 -91.05582 15:06:49 11/13/2013 MVK

Lower 

Mississippi 408.7 408.7C 18 32.05350 -91.05707 15:11:46 11/13/2013 MVK

Lower 

Mississippi 408.7 408.7D 13 32.05364 -91.05847 15:14:50 11/13/2013 MVK

Lower 

Mississippi 408.7 408.7E 2 32.05370 -91.05981 15:18:12 11/13/2013 MVK

Lower 

Mississippi 404.9 404.9 45 32.05340 -91.06103 15:52:12 11/13/2013 MVK

Lower 

Mississippi 402.3 402.3 45 31.99763 -91.08623 15:59:30 11/13/2013 MVK

Lower 

Mississippi 399.4 399.4 40 31.98175 -91.12495 16:08:54 11/13/2013 MVK

Lower 

Mississippi 397.9 397.9 55 31.97780 -91.17751 16:15:50 11/13/2013 MVK

Lower 

Mississippi 393.8 393.8 33 31.96135 -91.18893 16:27:01 11/13/2013 MVK

Lower 

Mississippi 391 391 40 31.90221 -91.19941 16:35:26 11/13/2013 MVK

Lower 

Mississippi 389.8 389.8 52 31.87324 -91.23049 16:49:24 11/13/2013 MVK

Lower 

Mississippi 387 387 44 31.86468 -91.25164 16:57:29 11/13/2013 MVK

Lower 

Mississippi 385 385 50 31.85497 -91.29661 17:03:38 11/13/2013 MVK

Lower 

Mississippi 382.2 382.2A 13 31.85698 -91.33107 17:29:09 11/13/2013 MVK

Lower 

Mississippi 382.2 382.2B 55 31.82145 -91.35367 17:25:46 11/13/2013 MVK

Lower 

Mississippi 382.2 382.2CT 66 31.82143 -91.35292 17:20:18 11/13/2013 MVK
MRG&P Report No. 7 142

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 382.2 382.2D 65 31.82128 -91.35204 17:16:09 11/13/2013 MVK

Lower 

Mississippi 382.2 382.2E 60 31.82108 -91.35082 17:11:58 11/13/2013 MVK

Lower 

Mississippi 380 380 37 31.82109 -91.34977 17:37:05 11/13/2013 MVK

Lower 

Mississippi 378.1 378.1 46 31.78896 -91.36184 17:44:04 11/13/2013 MVK

Lower 

Mississippi 375.5 375.5 30 31.76036 -91.36272 17:51:07 11/13/2013 MVK

Lower 

Mississippi 371.2 371.2 74 31.72631 -91.38019 18:25:41 11/13/2013 MVK

Lower 

Mississippi 367.7 367.7 33 31.67024 -91.40084 18:38:50 11/13/2013 MVK

Lower 

Mississippi 364.8 364.8 40 31.61712 -91.40160 18:48:58 11/13/2013 MVK

Lower 

Mississippi 362.4 362.4A 77 31.57642 -91.40409 18:57:09 11/13/2013 MVK

Lower 

Mississippi 362.4 362.4B 66 31.54998 -91.42827 19:01:50 11/13/2013 MVK

Lower 

Mississippi 362.4 362.4C 42 31.55076 -91.42993 19:06:20 11/13/2013 MVK

Lower 

Mississippi 362.4 362.4D 29 31.55167 -91.43086 19:09:58 11/13/2013 MVK

Lower 

Mississippi 362.4 362.4E 7 31.55233 -91.43167 19:13:05 11/13/2013 MVK

Lower 

Mississippi 359.3 359.3 36 31.55359 -91.43215 19:21:01 11/13/2013 MVK

Lower 

Mississippi 357 357 50 31.52812 -91.47664 19:27:26 11/13/2013 MVK

Lower 

Mississippi 355 355.0A 15 31.51552 -91.51221 19:52:33 11/13/2013 MVK

Lower 

Mississippi 355 355.0B 45 31.48647 -91.52103 19:55:49 11/13/2013 MVK

Lower 

Mississippi 355 355.0C 69 31.48640 -91.51982 19:59:47 11/13/2013 MVK

Lower 

Mississippi 355 355.0D 73 31.48645 -91.51615 19:46:58 11/13/2013 MVK

Lower 

Mississippi 355 355.0ET 82 31.48631 -91.51736 19:35:59 11/13/2013 MVK

Lower 

Mississippi 353.7 353.7 55 31.48655 -91.51871 20:07:07 11/13/2013 MVK

Lower 

Mississippi 351.3 341.3 53 31.46739 -91.52041 20:40:17 11/13/2013 MVK
MRG&P Report No. 7 143

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 351.3 351.3 35 31.43043 -91.51432 20:14:08 11/13/2013 MVK

Lower 

Mississippi 346.1 346.1 95 31.37372 -91.46554 20:24:34 11/13/2013 MVK

Lower 

Mississippi 343.7 343.7 81 31.35018 -91.49411 20:32:24 11/13/2013 MVK

Lower 

Mississippi 340 340 32 31.31862 -91.51067 20:46:17 11/13/2013 MVK

Lower 

Mississippi 338 338 35 31.29868 -91.51467 20:51:52 11/13/2013 MVK

Lower 

Mississippi 334.4 334.4 58 31.27144 -91.52079 20:59:32 11/13/2013 MVK

Lower 

Mississippi 332.2 332.2AT 37 31.25764 -91.57959 21:06:07 11/13/2013 MVK

Lower 

Mississippi 332.2 332.2B 32 31.26345 -91.61599 21:09:13 11/13/2013 MVK

Lower 

Mississippi 332.2 332.2C 24 31.26558 -91.61583 21:12:24 11/13/2013 MVK

Lower 

Mississippi 332.2 332.2D 16 31.26730 -91.61519 21:15:20 11/13/2013 MVK

Lower 

Mississippi 332.2 332.2E 22 31.26846 -91.61495 21:18:15 11/13/2013 MVK

Lower 

Mississippi 330.4 330.4 41 31.27001 -91.61399 21:24:31 11/13/2013 MVK

Lower 

Mississippi 328.3 328.3 90 31.26706 -91.64720 21:39:13 11/13/2013 MVK

Lower 

Mississippi 325.8 325.8 38 31.23693 -91.64768 21:48:08 11/13/2013 MVK

Lower 

Mississippi 323.9 323.9 52 31.21908 -91.60967 21:54:16 11/13/2013 MVK

Lower 

Mississippi 322.6 322.6 57 31.19812 -91.58980 21:59:25 11/13/2013 MVK

Lower 

Mississippi 321.1 321.1 57 31.17959 -91.58862 22:07:40 11/13/2013 MVK

Lower 

Mississippi 316 316.0T 52 31.15938 -91.59614 8:36:12 11/13/2013 MVN

Lower 

Mississippi 314.5 314.5T 39 31.10021 -91.60738 8:43:50 11/13/2013 MVN

Lower 

Mississippi 312.8 312.8A 17 31.08514 -91.58848 8:52:47 11/13/2013 MVN

Lower 

Mississippi 312.8 312.8B 17 31.06989 -91.56449 8:57:53 11/13/2013 MVN

Lower 

Mississippi 312.8 312.8C 15 31.06850 -91.56583 9:12:29 11/13/2013 MVN
MRG&P Report No. 7 144

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 312.8 312.8D 16 31.06734 -91.56809 9:02:03 11/13/2013 MVN

Lower 

Mississippi 312.8 312.8ET 22 31.06808 -91.56698 9:20:38 11/13/2013 MVN

Lower 

Mississippi 311.4 311.4T 62 31.06622 -91.57011 9:26:58 11/13/2013 MVN

Lower 

Mississippi 309.8 309.8T 55 31.05102 -91.55732 9:40:27 11/13/2013 MVN

Lower 

Mississippi 308.5 308.5T 56 31.02863 -91.57011 9:47:49 11/13/2013 MVN

Lower 

Mississippi 306.3 306.3T 22 31.01662 -91.58805 9:54:46 11/13/2013 MVN

Lower 

Mississippi 303.1 303.1T 62 31.00630 -91.62308 10:20:02 11/13/2013 MVN

Lower 

Mississippi 299.7 299.7T 50 30.99287 -91.65505 10:29:53 11/13/2013 MVN

Lower 

Mississippi 297.5 297.5T 30 30.97982 -91.66336 10:37:19 11/13/2013 MVN

Lower 

Mississippi 295.4 285.4T 48 30.93190 -91.65052 11:45:17 11/13/2013 MVN

Lower 

Mississippi 294.2 294.2T 28 30.91729 -91.61690 10:47:11 11/13/2013 MVN

Lower 

Mississippi 292.9 292.9AT 32 30.91368 -91.56205 10:54:10 11/13/2013 MVN

Lower 

Mississippi 292.9 292.9C 18 30.91415 -91.53863 11:06:24 11/13/2013 MVN

Lower 

Mississippi 292.9 292.9D 20 30.91309 -91.54023 11:11:03 11/13/2013 MVN

Lower 

Mississippi 292.9 292.9E 14 30.91179 -91.54140 11:15:42 11/13/2013 MVN

Lower 

Mississippi 292.9 292;9B 14 30.91034 -91.54299 11:01:45 11/13/2013 MVN

Lower 

Mississippi 289.8 289.8T 50 30.90894 -91.54376 11:25:00 11/13/2013 MVN

Lower 

Mississippi 288.6 288.6T 31 30.87451 -91.51600 11:36:36 11/13/2013 MVN

Lower 

Mississippi 283.3 283.3T 43 30.85686 -91.51623 11:53:18 11/13/2013 MVN

Lower 

Mississippi 282 282.0T 62 30.81386 -91.53265 12:00:05 11/13/2013 MVN

Lower 

Mississippi 279.7 279.7T 43 30.78373 -91.54444 12:11:47 11/13/2013 MVN

Lower 

Mississippi 277.2 277.2T 46 30.77613 -91.56425 12:46:49 11/13/2013 MVN
MRG&P Report No. 7 145

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 275.5 275.5T 44 30.76273 -91.59654 12:53:57 11/13/2013 MVN

Lower 

Mississippi 272.2 272.2T 33 30.73434 -91.57276 13:03:02 11/13/2013 MVN

Lower 

Mississippi 269.5 269.5A 17 30.72999 -91.54337 13:11:32 11/13/2013 MVN

Lower 

Mississippi 269.5 269.5B 31 30.74684 -91.49147 13:18:01 11/13/2013 MVN

Lower 

Mississippi 269.5 269.5C 69 30.73870 -91.44967 13:21:58 11/13/2013 MVN

Lower 

Mississippi 269.5 269.5DT 82 30.73730 -91.44944 13:27:40 11/13/2013 MVN

Lower 

Mississippi 268.4 268.4T 58 30.73566 -91.44893 13:35:51 11/13/2013 MVN

Lower 

Mississippi 265.3 265.3T 14 30.73486 -91.44940 13:44:45 11/13/2013 MVN

Lower 

Mississippi 263 263.0T 55 30.74095 -91.43169 13:53:30 11/13/2013 MVN

Lower 

Mississippi 261.3 561.3 45 30.75933 -91.38316 18:26:45 11/12/2013 MVK

Lower 

Mississippi 260.9 260.9T 88 30.73571 -91.35841 14:09:57 11/13/2013 MVN

Lower 

Mississippi 258.8 258.8T 32 30.70649 -91.34973 14:18:46 11/13/2013 MVN

Lower 

Mississippi 258.8 958.8CT 35 30.67582 -91.34651 8:35:01 11/9/2013 MVM

Lower 

Mississippi 257.6 257.6T 84 30.65980 -91.33716 14:24:44 11/13/2013 MVN

Lower 

Mississippi 254.9 254.9T 48 30.64593 -91.30052 14:32:46 11/13/2013 MVN

Lower 

Mississippi 253 253.0T 70 30.61787 -91.29416 14:42:36 11/13/2013 MVN

Lower 

Mississippi 251 251 44 30.59412 -91.31090 14:50:06 11/13/2013 MVN

Lower 

Mississippi 249 249.0A 10 30.59405 -91.31097 14:57:35 11/13/2013 MVN

Lower 

Mississippi 249 249.0B 47 30.57384 -91.30431 15:00:45 11/13/2013 MVN

Lower 

Mississippi 249 249.0C 84 30.57303 -91.30442 15:05:20 11/13/2013 MVN

Lower 

Mississippi 249 249.0DT 103 30.57223 -91.30469 15:11:13 11/13/2013 MVN

Lower 

Mississippi 247.5 247.5T 45 30.57208 -91.30568 15:19:11 11/13/2013 MVN
MRG&P Report No. 7 146

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 246 246.0T 60 30.57036 -91.27860 15:25:52 11/13/2013 MVN

Lower 

Mississippi 244.8 244.8T 49 30.56814 -91.25585 15:32:33 11/13/2013 MVN

Lower 

Mississippi 242.4 242.4T 75 30.55588 -91.24075 15:40:57 11/13/2013 MVN

Lower 

Mississippi 240.3 240.3T 70 30.52724 -91.25689 15:49:20 11/13/2013 MVN

Lower 

Mississippi 238.1 238.1T 53 30.51144 -91.28472 16:00:34 11/13/2013 MVN

Lower 

Mississippi 235 235.0T 77 30.50619 -91.25385 16:11:26 11/13/2013 MVN

Lower 

Mississippi 227.8 227.8 45 30.52210 -91.20357 14:04:20 11/14/2013 MVN

Lower 

Mississippi 226.6 226.6 42 30.41764 -91.20003 14:15:01 11/14/2013 MVN

Lower 

Mississippi 224.2 224.2 56 30.40207 -91.20788 14:21:47 11/14/2013 MVN

Lower 

Mississippi 221.3 221.3A 8 30.37511 -91.23263 14:31:18 11/14/2013 MVN

Lower 

Mississippi 221.3 221.3B 12 30.34209 -91.22696 14:34:47 11/14/2013 MVN

Lower 

Mississippi 221.3 221.3C 22 30.34128 -91.22781 14:37:11 11/14/2013 MVN

Lower 

Mississippi 221.3 221.3DT 72 30.34027 -91.22848 14:39:37 11/14/2013 MVN

Lower 

Mississippi 220 220 64 30.33928 -91.22887 14:47:31 11/14/2013 MVN

Lower 

Mississippi 217.3 217.3 67 30.34061 -91.20752 14:56:04 11/14/2013 MVN

Lower 

Mississippi 215.6 215.6 45 30.34480 -91.16395 15:02:46 11/14/2013 MVN

Lower 

Mississippi 213.3 213.3 51 30.32996 -91.14112 15:14:21 11/14/2013 MVN

Lower 

Mississippi 211.4 211.4 50 30.31451 -91.17030 15:21:06 11/14/2013 MVN

Lower 

Mississippi 209 209 101 30.31964 -91.19932 15:30:07 11/14/2013 MVN

Lower 

Mississippi 206.2 206.2 60 30.29892 -91.23186 15:40:07 11/14/2013 MVN

Lower 

Mississippi 204.8 204.8 57 30.27667 -91.19409 15:46:58 11/14/2013 MVN

Lower 

Mississippi 202.1 202.1 0 30.27889 -91.17055 15:57:12 11/14/2013 MVN
MRG&P Report No. 7 147

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 200.7 200.7AT 50 30.27226 -91.12734 16:06:56 11/14/2013 MVN

Lower 

Mississippi 200.7 200.7B 34 30.25789 -91.10957 16:16:10 11/14/2013 MVN

Lower 

Mississippi 200.7 200.7C 23 30.25728 -91.11087 16:22:28 11/14/2013 MVN

Lower 

Mississippi 200.7 200.7D 20 30.25639 -91.11237 16:26:02 11/14/2013 MVN

Lower 

Mississippi 200.7 200.7E 18 30.25608 -91.11349 16:28:48 11/14/2013 MVN

Lower 

Mississippi 198.2 198.2 54 30.25580 -91.11494 16:38:16 11/14/2013 MVN

Lower 

Mississippi 196.2 196.2 52 30.23063 -91.13348 16:45:33 11/14/2013 MVN

Lower 

Mississippi 193.5 193.5 90 30.21343 -91.15938 16:55:22 11/14/2013 MVN

Lower 

Mississippi 191.4 191.4 54 30.17851 -91.15051 17:04:29 11/14/2013 MVN

Lower 

Mississippi 189.4 189.4 45 30.19202 -91.12005 17:12:15 11/14/2013 MVN

Lower 

Mississippi 186.8 186.8 53 30.20983 -91.09548 17:20:25 11/14/2013 MVN

Lower 

Mississippi 184.8 184.8 70 30.21242 -91.05134 17:33:54 11/14/2013 MVN

Lower 

Mississippi 181.5 181.5 58 30.19585 -91.02356 17:42:58 11/14/2013 MVN

Lower 

Mississippi 179.2 179.2 52 30.15395 -90.99874 17:52:10 11/14/2013 MVN

Lower 

Mississippi 177 177.0A 12 30.12905 -91.02077 19:06:52 11/14/2013 MVN

Lower 

Mississippi 177 177.0B 28 30.11270 -91.01394 19:03:19 11/14/2013 MVN

Lower 

Mississippi 177 177.0C 44 30.11338 -91.01385 18:59:29 11/14/2013 MVN

Lower 

Mississippi 177 177.0D 65 30.11444 -91.01374 18:54:31 11/14/2013 MVN

Lower 

Mississippi 177 177.0E 80 30.11566 -91.01369 18:47:50 11/14/2013 MVN

Lower 

Mississippi 173.7 173.7 50 30.11735 -91.01371 19:18:34 11/14/2013 MVN

Lower 

Mississippi 172 172 95 30.10919 -90.95989 19:26:20 11/14/2013 MVN

Lower 

Mississippi 170.6 170.6 107 30.12407 -90.94664 19:32:54 11/14/2013 MVN
MRG&P Report No. 7 148

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 168.5 168.5 82 30.13666 -90.93327 19:43:50 11/14/2013 MVN

Lower 

Mississippi 164.8 164.8 76 30.11330 -90.91441 19:54:04 11/14/2013 MVN

Lower 

Mississippi 162.2 162.2 85 30.06308 -90.89359 20:03:41 11/14/2013 MVN

Lower 

Mississippi 160.2 160.2 80 30.06111 -90.85168 20:12:28 11/14/2013 MVN

Lower 

Mississippi 157.7 157.7 60 30.03490 -90.83702 20:21:40 11/14/2013 MVN

Lower 

Mississippi 156.4 156.4 75 29.99854 -90.83136 20:31:24 11/14/2013 MVN

Lower 

Mississippi 152.9 152.9B 50 29.98151 -90.82006 20:41:32 11/14/2013 MVN

Lower 

Mississippi 152.9 152.9CT 53 30.01424 -90.77539 20:46:29 11/14/2013 MVN

Lower 

Mississippi 152.9 152.9D 38 30.01276 -90.77469 20:52:29 11/14/2013 MVN

Lower 

Mississippi 150 150 75 30.01145 -90.77318 21:01:02 11/14/2013 MVN

Lower 

Mississippi 147.3 147.3 64 30.01344 -90.72791 21:10:22 11/14/2013 MVN

Lower 

Mississippi 144.3 144.3 75 30.03442 -90.69015 21:21:54 11/14/2013 MVN

Lower 

Mississippi 142.4 142.4 140 30.05041 -90.64640 21:29:26 11/14/2013 MVN

Lower 

Mississippi 140.3 140.3 75 30.03290 -90.62283 21:46:21 11/14/2013 MVN

Lower 

Mississippi 136.6 136.6 80 30.04618 -90.59514 21:54:53 11/14/2013 MVN

Lower 

Mississippi 133.6 133.6 90 30.04631 -90.53432 22:03:13 11/14/2013 MVN

Lower 

Mississippi 132 132 80 30.05193 -90.48731 22:10:56 11/14/2013 MVN

Lower 

Mississippi 127.5 127.5 70 30.03346 -90.47261 22:21:34 11/14/2013 MVN

Lower 

Mississippi 125.7 125.7 72 29.99474 -90.43571 22:33:35 11/14/2013 MVN

Lower 

Mississippi 123 123.0B 98 29.98912 -90.40583 23:02:03 11/14/2013 MVN

Lower 

Mississippi 123 123.0CT 150 29.95351 -90.39663 22:55:24 11/14/2013 MVN

Lower 

Mississippi 123 123.0D 100 29.95424 -90.39562 22:49:01 11/14/2013 MVN
MRG&P Report No. 7 149

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 123 123.0E 22 29.95497 -90.39418 22:44:55 11/14/2013 MVN

Lower 

Mississippi 116.7 116.7T 75 29.95560 -90.39285 10:19:50 11/14/2013 MVN

Lower 

Mississippi 114.1 114.1T 82 29.95295 -90.30241 10:34:20 11/14/2013 MVN

Lower 

Mississippi 110 110.0T 100 29.97171 -90.26586 10:46:58 11/14/2013 MVN

Lower 

Mississippi 107.5 107.5T 90 29.93442 -90.21779 10:56:13 11/14/2013 MVN

Lower 

Mississippi 104.5 104.5T 120 29.92927 -90.18627 11:06:58 11/14/2013 MVN

Lower 

Mississippi 103 103.0T 86 29.95616 -90.14687 11:15:54 11/14/2013 MVN

Lower 

Mississippi 96.4 96.4T 104 29.93393 -90.13820 11:33:19 11/14/2013 MVN

Lower 

Mississippi 91.5 91.5T 62 29.92947 -90.05994 11:47:52 11/14/2013 MVN

Lower 

Mississippi 89.9 89.9B 70 29.94565 -90.01215 11:58:35 11/14/2013 MVN

Lower 

Mississippi 89.9 89.9C 74 29.93561 -89.99052 12:04:18 11/14/2013 MVN

Lower 

Mississippi 89.9 89.9DT 75 29.93507 -89.98969 12:09:23 11/14/2013 MVN

Lower 

Mississippi 89.9 89.9E 65 29.93375 -89.99062 12:13:35 11/14/2013 MVN

Lower 

Mississippi 86 86.0T 96 29.93219 -89.99144 12:30:05 11/14/2013 MVN

Lower 

Mississippi 82.7 82.7T 70 29.93140 -89.99239 12:51:51 11/14/2013 MVN

Lower 

Mississippi 81.5 81.5T 90 29.92150 -89.92885 13:01:32 11/14/2013 MVN

Lower 

Mississippi 78 78.0T 85 29.88107 -89.90338 13:17:56 11/14/2013 MVN

Lower 

Mississippi 75.2 75.2T 91 29.86708 -89.91284 13:26:46 11/14/2013 MVN

Lower 

Mississippi 73.1 73.1T 80 29.88097 -89.96742 13:36:17 11/14/2013 MVN

Lower 

Mississippi 65.8 65.8T 74 29.84465 -89.98300 13:51:40 11/14/2013 MVN

Lower 

Mississippi 60 63.0T 87 29.81877 -90.00186 14:00:25 11/14/2013 MVN

Lower 

Mississippi 59 59.0T 80 29.72807 -89.99216 14:11:08 11/14/2013 MVN
MRG&P Report No. 7 150

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 57 57.0A 80 29.69145 -89.97077 14:26:35 11/14/2013 MVN

Lower 

Mississippi 57 57.0B 74 29.64167 -89.94556 14:32:45 11/14/2013 MVN

Lower 

Mississippi 57 57.0C 74 29.63023 -89.91425 14:35:50 11/14/2013 MVN

Lower 

Mississippi 57 57.0DT 80 29.62982 -89.91746 14:40:40 11/14/2013 MVN

Lower 

Mississippi 57 57.0E 80 29.62904 -89.91835 14:45:08 11/14/2013 MVN

Lower 

Mississippi 55.4 55.4T 81 29.62808 -89.91934 14:52:32 11/14/2013 MVN

Lower 

Mississippi 52.8 52.8T 97 29.62744 -89.92032 15:03:49 11/14/2013 MVN

Lower 

Mississippi 51.2 51.2T 90 29.61400 -89.89502 15:13:18 11/14/2013 MVN

Lower 

Mississippi 47.3 47.3T 67 29.60349 -89.85349 15:23:56 11/14/2013 MVN

Lower 

Mississippi 44.8 44.8T 86 29.59513 -89.82749 15:33:08 11/14/2013 MVN

Lower 

Mississippi 42.8 42.8T 88 29.56040 -89.77800 15:41:07 11/14/2013 MVN

Lower 

Mississippi 40 40.0T 78 29.53370 -89.75050 15:49:50 11/14/2013 MVN

Lower 

Mississippi 37 37.0T 87 29.52023 -89.72140 15:59:06 11/14/2013 MVN

Lower 

Mississippi 35.2 35.2T 90 29.48596 -89.69542 16:09:24 11/14/2013 MVN

Lower 

Mississippi 33 33.0A 38 29.46034 -89.65592 9:16:46 11/15/2013 MVN

Lower 

Mississippi 33 33.0BT 48 29.45612 -89.62675 9:23:25 11/15/2013 MVN

Lower 

Mississippi 33 33.0C 49 29.19155 -89.26469 9:28:49 11/15/2013 MVN

Lower 

Mississippi 33 33.0D 20 29.19075 -89.26644 9:37:57 11/15/2013 MVN

Lower 

Mississippi 33 33.0E 8 29.18992 -89.26849 9:43:04 11/15/2013 MVN

Lower 

Mississippi 30.4 30.4T 102 29.18904 -89.27161 9:07:45 11/15/2013 MVN

Lower 

Mississippi 26 26.0T 87 29.18767 -89.27512 8:53:54 11/15/2013 MVN

Lower 

Mississippi 23.9 23.9T 75 29.22326 -89.29185 8:45:58 11/15/2013 MVN
MRG&P Report No. 7 151

1 UMR Miles: 0=Cairo, IL, and increase upstream. 

LMR Miles: 0= Head of Passes, LA, and increase upstream to Cairo, IL 

Reach 

Designation 

River 

Mile1 SAMPLE NAME 

Water Depth 

at Sample 

Location, ft 

LATITUDE 

(dd) 

LONGITUDE 

(dd) 

TIME of 

Sampling 

(UTC) 

DATE of 

Sample 

USACE 

District 

Lower 

Mississippi 21.9 21.9T 90 29.29342 -89.36164 8:37:38 11/15/2013 MVN

Lower 

Mississippi 18 18.0T 90 29.31185 -89.37540 8:21:48 11/15/2013 MVN

Lower 

Mississippi 13.5 13.5T 68 29.35822 -89.42726 8:10:59 11/15/2013 MVN

Lower 

Mississippi 11.9 11.9T 63 29.34432 -89.48026 8:04:33 11/15/2013 MVN

Lower 

Mississippi 5.5 5.5T 50 29.35686 -89.51028 7:50:38 11/15/2013 MVN

Lower 

Mississippi 2.8 2.8A 38 29.36482 -89.54414 7:25:59 11/15/2013 MVN

Lower 

Mississippi 2.8 2.8B 48 29.40193 -89.60260 7:29:32 11/15/2013 MVN

Lower 

Mississippi 2.8 2.8CT 49 29.43888 -89.59692 7:33:56 11/15/2013 MVN

Lower 

Mississippi 2.8 2.8D 20 29.43886 -89.59895 7:38:06 11/15/2013 MVN

Lower 

Mississippi 2.8 2.8E 8 29.43861 -89.60045 7:43:27 11/15/2013 MVN
MRG&P Report No. 7 152

Appendix B: Plates

Location Maps: Grafton, IL, to Cairo, IL

Cairo, IL, to Memphis, TN

Below Memphis, TN, to Vicksburg, MS

Vicksburg, MS, to above New Orleans, LA

New Orleans, LA, to Gulf of Mexico

Hydrograph: 1931-1933, 1987-1989, and 2011-2013 at Hickman, KY

Sampler Detail
MRG&P Report No. 7 153

Figure B1. Location Map: Grafton, IL, to Cairo, IL. 
MRG&P Report No. 7 154

Figure B2. Location Map: Cairo, IL, to Memphis, TN. 
MRG&P Report No. 7 155

Figure B3. Location Map: Below Memphis, TN, to Vicksburg, MS. 
MRG&P Report No. 7 156

Figure B4. Location Map: Vicksburg, MS, to above New Orleans, LA.
MRG&P Report No. 7 157

Figure B5. Location Map: New Orleans, LA, to Gulf of Mexico. 
MRG&P Report No. 

7 158

Figure B6. Hydrographs at Hickman, KY, for 1931–1933, 1987–1989. and 2011–2013.
MRG&P Report No. 7 159

Figure B7. Sampler details. 
MRG&P Report No. 7 160

Appendix C: Daily Progress Reports, Field 

Sampling
MRG&P Report No. 7 161

Day 1: November 7, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Thursday 7 November 2013 19:00

Just got off the phone with Thad. They made good progress today--

about 130-140 river miles. They should move out of the MVS reach 

by end of day tomorrow.

Based on sampling today Thad plans to take 2 of the samplers to a 

machine shop and have them shortened by 18" or so to make them 

more manageable. As they are, samplers require 2 people to 

effectively handle them when loaded mainly due to their size, not 

their weight. They are coming up only about 1/2 full after 

dragging them 20-25 feet. They might fill completely if drug a 

much longer distance, but that has some issues. If the shorter 

samplers prove to yield the same quantity of material and improve 

handling we'll see what is next.

At the 130 miles per day rate, be on alert that downstream 

districts may have to mobilize earlier than expected.

Andy
MRG&P Report No. 7 162

Day 2: November 8, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Sampling was completed for the Upper MS River to the mouth of the 

Ohio. Progress was slowed a little due to some mechanical 

problems with 1 boat.

MVM staff members arrived and are ready to go. MVS staff report 

they will be picked up Sat morning and returned to St. Louis.

Crews left Saturday am at 07:00 to resume sampling for MVM 

segments. Upper reach of MVM District has a relatively large 

number of samples so will have to see what progress will be at 

end of day.

Andy
MRG&P Report No. 7 163

Day 3: November 9, 2013

Classification: UNCLASSIFIED

Caveats: NONE

9 November 2013 17:55 

Thad just called and reported progress to RM 850. This is 

excellent progress due to the large number of samples between 

Cairo and Caruthersville.

The team expects to be to Memphis tomorrow evening. As Memphis is 

their PDS, this means Brian and Robert will have to return home 

for the evening then get back to the sampling crews Monday 

morning. Thad and team are considering where they need to make 

hotel reservations. Once that is set we will determine what 

arrangements need to be made.

Current outlook is to complete MVM reach Tuesday and transfer 

sampling duties to MVK Wednesday. More on that later.

Andy
MRG&P Report No. 7 164

Day 4: November 10, 2013

Classification: UNCLASSIFIED

Caveats: NONE

10 November 2013 @ 17:30

Thad reported getting to RM 725 today which is a McKeller Harbor 

in Memphis. The team is staying in Memphis so MVM crew members 

are staying at home.

Sampling continued using the remaining short sampler and one 

standard sampler (the other short sampler snagged on revetment 

yesterday and was lost). Thad's team had several times today when 

the sampler hung on revetment, but they were able to free it. It 

was discussed that where ACM was on the bank it would be 

appropriate to begin any sampling at least 500ft off water's edge 

to minimize potential for snagging the ACM and or loss of another 

sampler.

They got approx 150 miles sampled today and project at least 150 

miles for tomorrow. Expectation is to complete the MVM sampling 

tomorrow and transition to MVK team first thing Tuesday morning.

Contacted Richie to mobilize MVK crew tomorrow to Cleveland where 

the sampling team will stay. He was going to contact their staff 

and get them to Cleveland and ready for Tuesday's sampling.

Andy
MRG&P Report No. 7 165

Day 5: November 11, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Brian and Robert reported making it in to Cleveland for the 

evening.

Sampling completed to Rosedale, MS vicinity.

Sampling will resume with one boat resuming at Rosedale and the 

other going to Vicksburg and starting there.

Thad expects to be in Natchez Tuesday evening and ready to start 

sampling in MVN reach first thing Wednesday.

MVN crew was notified they would need to report to Natchez 

tomorrow. Hotel arrangements have not been provided yet, but will 

be given to MVN as soon as Thad relays that info.

Andy
MRG&P Report No. 7 166

Day 6: November 12, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Got a call from Thad last night about 6:00. The sampling planned 

for the day had been completed despite windy and cold weather and 

some technical difficulties--lost sampler and burned out winch on 

one boat.

Much appreciation to the teams for persevering weather and 

keeping up the high rate of sample collection!

The teams will converge on Baton Rouge Wednesday evening.

MVN will join the team in Baton Rouge to begin their sampling 

adventure Thursday morning. MVK will complete their reach and 

pass the baton to MVN tonight.

Andy
MRG&P Report No. 7 167

Day 7: November 13, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Thad reports that the boat crews sampled ~200 miles of river 

today--way to go! Only about 220 miles remain. The field teams 

have done an outstanding job to beat the original schedule by a 

week! 

MVN crews are mobilized to Baton Rouge to begin sampling 

tomorrow, Thursday. MVK team members had some of the roughest 

weather but have hung in there to advance the schedule further.

Outlook for tomorrow is to be very close to finished with field 

sampling at the end of the day. If not tomorrow, sampling will 

conclude Friday morning. All crews will then return to New 

Orleans or Vicksburg.

USGS will need to make arrangements to pick up their staff--

Dennis was originally planning to join the sampling effort Monday 

the 18th then drive everyone back to Little Rock. With sampling 

done Friday Dennis won't be back from leave.

Andy
MRG&P Report No. 7 168

Day 8: November 14, 2013

Classification: UNCLASSIFIED

Caveats: NONE

Report today is that 1 boat completed sampling and will head back 

to Vicksburg first thing tomorrow morning.

The other boat has 16 sample sites remaining and should complete 

those by mid-morning (10:00) tomorrow. They will head back to 

Vicksburg once sampling is complete.

Congrats to the sampling teams who are getting the field work 

done in rapid order!

Once the teams get back and unload all samples we will decide on 

when and how lab analysis will proceed. Thad and I will discuss 

this Monday and get back to everyone. Expect a conference call 

sometime next week once we can scope out what needs to happen.

Andy
MRG&P Report No. 7 169

Day 9: November 15, 2013

Sampling completed, all crew members heading back to ERDC or MVN 

offices. 

Job well done!

Andy
MRG&P Report No. 7 170

Appendix D: Data Listing for Standard Sieve 

and Laser Diffraction Method

Sieve analysis for particles <2 mm 

Laser Diffraction analysis for particles 1 mm and less 
MRG&P Report No. 7 171

Table D1 Particle size distributions of thalweg samples using sieve (>2 mm) and LD (1 mm>), 

UMR Grafton to Cairo, IL. 

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U204 204.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 41.9 16.6 15.9 15.0

U199 199.0 100.0 100.0 81.4 72.2 68.1 64.5 59.7 28.8 4.3 0.9 0.4

U196CT 196.0 100.0 100.0 100.0 100.0 100.0 99.8 98.5 68.9 9.3 0.0 0.0

U195.5 

MOAT 195.5 100.0 100.0 100.0 100.0 99.5 99.4 99.0 51.9 1.0 0.0 0.0

U194BT 194.0 100.0 100.0 95.5 84.3 72.2 56.2 39.6 18.5 7.4 1.0 0.0

U192.5 192.5 100.0 100.0 99.3 95.8 91.3 86.1 77.8 45.7 18.6 2.7 0.0

U191 191.0 100.0 100.0 100.0 100.0 99.4 98.6 95.0 37.7 1.1 0.0 0.0

U190 190.0 100.0 100.0 89.4 88.3 86.5 83.8 74.1 27.0 1.2 0.0 0.0

U189 189.0 100.0 100.0 100.0 99.6 98.0 97.2 94.0 54.1 1.6 0.0 0.0

U188 188.0 100.0 100.0 100.0 99.6 99.3 98.9 96.3 39.1 0.8 0.0 0.0

U187 187.0 100.0 100.0 90.3 87.2 80.6 56.3 28.9 3.6 1.0 0.9 0.4

U186 186.0 100.0 100.0 93.6 91.7 89.3 83.8 63.3 11.9 0.0 0.0 0.0

U185 185.0 100.0 100.0 100.0 98.4 98.1 97.0 95.1 46.4 5.6 0.0 0.0

U184 184.0 100.0 100.0 100.0 99.2 96.5 91.6 82.3 37.5 5.9 5.1 3.7

U183.5 183.5 100.0 100.0 100.0 100.0 100.0 100.0 99.7 93.9 12.8 0.0 0.0

U183BT 183.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.4 26.8 0.0 0.0

U182 182.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.9 28.9 0.0 0.0

U180 180.0 100.0 100.0 100.0 100.0 99.9 96.3 82.8 53.6 20.2 1.1 0.0

U177.5 177.5 100.0 100.0 100.0 97.5 95.8 92.5 87.4 33.2 0.2 0.0 0.0

U175 175.0 100.0 100.0 100.0 96.9 94.8 91.8 84.7 32.5 0.3 0.0 0.0

U174DT 174.0 100.0 100.0 100.0 95.8 94.5 91.2 83.7 26.1 0.0 0.0 0.0

U170 170.0 100.0 100.0 100.0 97.4 95.6 89.8 73.0 15.0 0.0 0.0 0.0

U165 165.0 100.0 100.0 100.0 98.6 97.1 94.2 85.9 41.4 6.3 0.0 0.0

U160.5AT 160.5 100.0 100.0 100.0 100.0 100.0 100.0 99.7 99.7 77.0 11.4 0.0

U160DT 160.0 100.0 100.0 100.0 96.5 94.3 89.0 80.8 44.3 3.4 0.0 0.0

U155 155.0 100.0 100.0 100.0 99.5 98.1 95.2 84.6 35.2 5.5 0.7 0.0

U150 150.0 100.0 100.0 100.0 90.0 81.8 69.7 47.9 12.1 2.3 0.7 0.0

U145 145.0 100.0 100.0 95.0 81.2 59.4 31.9 11.4 1.0 0.0 0.0 0.0

U140 140.0 100.0 100.0 100.0 95.1 88.8 64.6 30.4 1.9 0.0 0.0 0.0

U135 135.0 100.0 100.0 100.0 97.6 83.8 61.2 32.2 5.8 0.3 0.2 0.0

U131AT 131.0 100.0 100.0 100.0 100.0 99.7 98.4 93.7 47.3 2.6 0.0 0.0

U125 125.0 100.0 100.0 100.0 98.7 97.1 94.1 85.6 32.4 0.7 0.0 0.0

U120 120.0 100.0 100.0 100.0 98.2 95.2 85.9 61.5 7.1 0.0 0.0 0.0

U117.5 117.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 98.6 94.9

U117BT 117.0 100.0 100.0 96.6 82.9 69.5 56.1 40.7 6.8 0.0 0.0 0.0
MRG&P Report No. 7 172

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U115 115.0 100.0 100.0 100.0 99.2 97.4 94.7 89.8 72.4 25.8 0.3 0.0

U110 110.0 100.0 100.0 100.0 99.5 98.9 97.6 93.5 42.5 1.2 0.0 0.0

U105 105.0 100.0 100.0 100.0 99.4 99.3 99.1 98.8 64.8 6.1 0.0 0.0

U100 100.0 100.0 100.0 96.1 95.5 94.7 92.2 83.9 38.8 2.4 0.0 0.0

U95 95.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.0 19.1 0.0 0.0

U90 90.0 100.0 100.0 100.0 98.1 95.6 91.0 84.5 47.8 7.1 0.0 0.0

U85 85.0 100.0 100.0 100.0 100.0 100.0 99.1 93.9 33.6 0.6 0.0 0.0

U79AT 79.0 100.0 100.0 100.0 100.0 98.3 95.5 90.1 38.2 2.5 0.0 0.0

U75 75.0 100.0 100.0 100.0 99.2 98.3 97.4 94.6 47.4 6.3 0.0 0.0

U70 70.0 100.0 100.0 82.3 79.4 77.0 75.8 74.0 39.2 3.6 0.0 0.0

U65 65.0 100.0 100.0 83.3 77.3 68.5 64.9 59.6 26.7 2.3 0.0 0.0

U60 60.0 100.0 100.0 100.0 99.5 97.8 95.9 91.2 32.8 0.1 0.0 0.0

U55 55.0 100.0 100.0 100.0 100.0 99.6 97.8 83.4 22.9 0.1 0.0 0.0

U50 50.0 100.0 100.0 100.0 96.7 93.8 85.3 56.3 8.1 0.0 0.0 0.0

U45 45.0 100.0 100.0 95.3 87.6 79.8 59.2 24.7 0.4 0.0 0.0 0.0

U40 40.0 100.0 100.0 100.0 100.0 99.7 98.9 95.0 54.1 1.8 0.0 0.0

U35 35.0 100.0 100.0 100.0 100.0 98.6 94.7 85.6 32.6 0.5 0.0 0.0

U30DT 30.0 100.0 100.0 82.4 75.3 66.1 56.4 47.6 28.0 1.9 0.0 0.0

U25 25.0 100.0 100.0 97.8 97.3 95.8 94.6 91.4 45.7 1.4 0.0 0.0

U20 20.0 100.0 100.0 94.0 84.8 66.8 36.9 6.1 2.5 0.5 0.2 0.2

U15 15.0 100.0 100.0 100.0 100.0 99.6 98.7 96.2 64.5 17.8 0.2 0.0

U10 10.0 100.0 100.0 100.0 99.7 98.6 96.5 90.7 68.8 16.8 0.0 0.0

U05 5.0 100.0 100.0 92.6 85.1 82.1 73.8 61.8 41.9 12.0 0.1 0.0

U1.5DT 1.5 100.0 100.0 100.0 100.0 100.0 99.8 99.3 75.1 3.4 0.0 0.0
MRG&P Report No. 7 173

Table D2 Particle size distributions of thalweg samples using sieve (>2 mm) and LD (1 mm>), LMR Cairo, IL, to Head 

of Passes. 

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

958.8CT 958.8 100.0 100.0 86.8 57.5 36.5 30.4 26.9 18.3 7.2 2.6 1.3

955.7 955.7 100.0 100.0 92.6 50.2 20.2 8.5 3.8 1.7 1.1 0.8 0.5

952.6AT 952.6 100.0 100.0 100.0 98.2 91.3 84.7 78.9 43.1 13.0 9.1 6.9

951.4 951.4 100.0 100.0 100.0 99.0 97.5 91.2 73.6 14.2 0.0 0.0 0.0

949.2 949.2 100.0 100.0 100.0 100.0 99.5 98.2 91.7 24.0 0.0 0.0 0.0

947.3 947.3 100.0 100.0 100.0 100.0 99.7 98.9 96.5 36.9 0.5 0.0 0.0

945 945 100.0 100.0 100.0 100.0 98.7 97.0 94.3 66.0 7.7 0.0 0.0

942.8 942.8 100.0 100.0 100.0 98.9 97.8 95.5 87.3 29.0 0.2 0.0 0.0

941.2 941.2 100.0 100.0 98.6 96.2 95.1 93.3 84.1 29.7 1.3 0.0 0.0

938.8 938.8 100.0 100.0 100.0 99.5 99.0 98.2 95.5 70.0 18.7 0.2 0.0

937 937 100.0 100.0 100.0 100.0 99.1 96.2 90.5 42.6 4.5 0.0 0.0

935.2CT 935.2 100.0 100.0 100.0 98.7 95.2 88.6 71.3 9.4 0.0 0.0 0.0

933.0DT 933 100.0 100.0 91.7 89.6 88.8 85.7 75.6 14.1 0.0 0.0 0.0

931 931 100.0 100.0 96.0 96.0 95.3 95.1 94.7 71.8 3.5 0.0 0.0

929.1 929.1 100.0 100.0 100.0 99.7 97.7 93.2 89.9 49.6 2.7 0.0 0.0

927.9 927.9 100.0 100.0 100.0 98.7 96.1 93.1 88.4 55.6 10.2 0.0 0.0

926.7AT 926.7 100.0 100.0 95.8 93.3 87.7 76.3 57.1 16.6 0.2 0.0 0.0

924.5 924.5 100.0 100.0 100.0 98.4 96.0 92.4 84.7 30.8 0.8 0.0 0.0

923 923 100.0 100.0 100.0 99.1 98.6 97.2 93.0 55.8 10.3 0.0 0.0

919.1 919.1 100.0 100.0 100.0 98.2 95.6 91.7 82.4 38.8 2.9 0.0 0.0

917.1 917.1 100.0 100.0 92.1 85.7 81.2 77.2 66.6 38.1 12.1 0.3 0.0

916.8 916.8 100.0 100.0 100.0 100.0 99.5 98.9 97.1 62.3 8.6 0.0 0.0

915.4AT 915.4 100.0 100.0 96.3 92.4 76.1 52.5 26.3 2.6 0.0 0.0 0.0

913.5 913.5 100.0 100.0 100.0 100.0 98.7 95.8 84.5 33.0 1.2 0.0 0.0

911.9 911.9 100.0 100.0 100.0 100.0 98.8 98.1 95.6 74.4 8.0 0.0 0.0

909.8 909.8 100.0 100.0 100.0 99.7 99.5 99.0 97.8 56.5 9.5 0.0 0.0

908.1 908.1 100.0 100.0 92.8 91.2 88.5 87.3 84.4 36.6 2.1 0.0 0.0

905.9 905.9 100.0 100.0 100.0 98.4 93.4 86.4 73.4 32.0 3.4 0.0 0.0

904.6 904.6 100.0 100.0 100.0 90.4 84.7 73.1 56.6 10.6 0.0 0.0 0.0

902.3 902.3 100.0 100.0 100.0 100.0 99.2 98.0 95.0 32.7 0.2 0.0 0.0

901 901 100.0 100.0 100.0 100.0 99.1 96.7 84.5 15.1 0.0 0.0 0.0

898.9 898.9 100.0 100.0 100.0 100.0 99.1 98.1 92.7 18.8 0.0 0.0 0.0

897.9AT 897.9 100.0 100.0 100.0 95.3 87.0 69.5 38.9 3.6 0.0 0.0 0.0

896.7 896.7 100.0 100.0 100.0 98.6 94.5 90.5 81.7 24.8 0.1 0.0 0.0

894.8 894.8 100.0 100.0 100.0 100.0 99.9 99.0 94.7 34.7 0.7 0.0 0.0
MRG&P Report No. 7 174

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

893.5 893.5 100.0 100.0 100.0 100.0 99.6 99.1 98.1 43.8 0.2 0.0 0.0

891.8 891.8 100.0 100.0 100.0 98.6 97.5 96.3 90.4 27.3 0.2 0.0 0.0

890.5 890.5 100.0 100.0 100.0 100.0 100.0 99.9 99.7 51.6 1.1 0.0 0.0

888.3 888.3 100.0 100.0 100.0 98.4 95.0 87.8 63.4 8.0 0.0 0.0 0.0

886.4 886.4 100.0 100.0 100.0 99.4 98.4 96.1 90.3 40.0 1.0 0.0 0.0

884 884 100.0 100.0 100.0 85.1 78.3 68.4 51.4 9.4 0.0 0.0 0.0

882.2 882.2 100.0 100.0 100.0 100.0 100.0 100.0 99.5 54.9 0.3 0.0 0.0

879.8AT 879.8 100.0 100.0 100.0 97.2 96.9 96.2 94.5 50.8 1.3 0.0 0.0

878.1 878.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 33.6 0.0 0.0

877 877 100.0 100.0 100.0 99.0 97.3 92.5 81.0 43.3 11.4 0.1 0.0

875.7 875.7 100.0 100.0 100.0 98.3 96.1 90.9 69.5 17.9 2.8 0.3 0.0

873.7 873.7 100.0 100.0 100.0 100.0 100.0 99.5 95.8 45.4 0.9 0.0 0.0

871 871 100.0 100.0 100.0 100.0 99.4 96.9 88.3 41.7 3.4 0.0 0.0

870 870 100.0 100.0 100.0 99.2 98.9 98.2 93.1 34.5 1.4 0.0 0.0

867.3 867.3 100.0 100.0 100.0 100.0 100.0 100.0 99.8 81.2 5.8 0.0 0.0

865.7 865.7 100.0 100.0 100.0 99.1 97.8 93.2 72.7 11.0 0.0 0.0 0.0

864.5 864.5 100.0 100.0 100.0 100.0 99.3 98.2 95.8 56.3 7.0 0.0 0.0

862.7ET 862.7 100.0 100.0 100.0 100.0 100.0 99.7 98.7 45.5 2.1 0.0 0.0

860.4 860.4 100.0 100.0 100.0 100.0 98.7 94.2 84.2 29.0 0.4 0.0 0.0

858.6 858.6 100.0 100.0 100.0 100.0 99.6 99.6 99.2 62.2 10.7 0.0 0.0

857 857 100.0 100.0 100.0 99.4 98.3 95.1 81.0 40.3 3.7 0.0 0.0

856 856 100.0 100.0 100.0 100.0 99.2 98.4 80.4 16.9 3.0 0.4 0.0

855 855 100.0 100.0 100.0 100.0 99.6 98.7 85.6 13.1 0.0 0.0 0.0

853 853 100.0 100.0 100.0 100.0 98.2 95.3 90.4 32.7 0.1 0.0 0.0

851 851 100.0 100.0 100.0 98.4 96.5 93.6 79.1 37.2 3.2 0.0 0.0

849.4 849.4 100.0 100.0 100.0 100.0 98.9 97.7 90.3 14.5 0.0 0.0 0.0

848.2 848.2 100.0 100.0 97.6 91.5 88.0 76.8 45.6 5.3 0.0 0.0 0.0

846.5AT 846.5 100.0 100.0 100.0 100.0 99.7 99.4 81.7 35.8 3.7 0.0 0.0

844.6 844.6 100.0 100.0 100.0 98.9 98.2 97.3 89.2 30.5 0.1 0.0 0.0

842.5 842.5 100.0 100.0 100.0 100.0 99.9 99.5 95.3 24.1 0.0 0.0 0.0

840.1 840.1 100.0 100.0 100.0 98.4 96.5 93.6 79.1 19.6 0.0 0.0 0.0

835.5 835.5 100.0 100.0 100.0 95.3 90.8 81.8 64.6 16.5 0.0 0.0 0.0

833.6 833.6 100.0 100.0 100.0 100.0 99.6 98.1 95.1 39.1 1.0 0.0 0.0

831 831 100.0 100.0 100.0 100.0 99.2 97.9 95.3 51.0 4.6 0.0 0.0

828 828 100.0 100.0 100.0 97.9 97.1 95.3 87.8 31.2 0.3 0.0 0.0

825.4 825.4 100.0 100.0 100.0 99.5 98.9 98.0 89.5 13.9 0.0 0.0 0.0

822 822 100.0 100.0 100.0 100.0 99.7 99.5 98.9 70.0 8.3 0.0 0.0
MRG&P Report No. 7 175

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

818.4AT 818.4 100.0 100.0 85.8 79.3 66.9 50.7 30.4 10.3 0.4 0.0 0.0

816.2 816.2 100.0 100.0 96.4 94.8 94.0 90.3 70.2 4.7 0.0 0.0 0.0

814.8 814.8 100.0 100.0 100.0 100.0 100.0 99.7 99.1 21.3 0.0 0.0 0.0

813 813 100.0 100.0 100.0 100.0 100.0 99.9 98.2 53.8 5.4 0.0 0.0

810.6 810.6 100.0 100.0 100.0 100.0 100.0 99.9 99.6 70.6 4.8 0.0 0.0

807.9 807.9 100.0 100.0 100.0 99.1 95.1 87.6 57.9 8.1 0.0 0.0 0.0

804.5 804.5 100.0 100.0 100.0 99.7 99.3 98.8 96.4 37.2 0.4 0.0 0.0

802.1 802.1 100.0 100.0 100.0 100.0 99.9 99.6 99.4 82.4 4.1 0.0 0.0

799 799 100.0 100.0 100.0 100.0 98.8 97.7 93.8 35.9 1.1 0.0 0.0

797.5 797.5 100.0 100.0 100.0 100.0 99.9 99.8 99.1 49.1 0.9 0.0 0.0

795.5AT 795.5 100.0 100.0 100.0 99.5 99.5 99.0 96.9 28.9 0.0 0.0 0.0

792.5 792.5 100.0 100.0 100.0 99.6 98.4 97.4 95.6 41.1 1.8 0.0 0.0

789.5 789.5 100.0 100.0 100.0 99.6 98.4 97.4 95.6 42.9 1.1 0.0 0.0

788 788 100.0 100.0 100.0 100.0 98.8 97.3 92.0 33.1 0.3 0.0 0.0

786.2 786.2 100.0 100.0 100.0 99.8 98.7 95.4 83.6 16.4 0.0 0.0 0.0

783.4 783.4 100.0 100.0 100.0 100.0 99.0 96.2 74.9 5.8 0.0 0.0 0.0

780.2 780.2 100.0 100.0 100.0 100.0 99.9 99.7 99.1 63.4 4.6 0.0 0.0

778.2 778.2 100.0 100.0 100.0 100.0 99.3 98.8 97.1 51.4 4.6 0.0 0.0

777 777 100.0 100.0 100.0 100.0 99.6 98.8 93.6 60.0 9.3 0.0 0.0

775.2 775.2 100.0 100.0 100.0 100.0 99.5 99.1 94.7 44.8 2.6 0.0 0.0

773.4DT 773.4 100.0 100.0 94.3 89.9 85.0 75.4 50.2 8.4 0.0 0.0 0.0

771.9 771.9 100.0 100.0 100.0 100.0 96.3 90.6 76.3 14.3 0.0 0.0 0.0

770.3 770.3 100.0 100.0 100.0 100.0 98.9 96.0 82.9 23.7 0.0 0.0 0.0

768.8 768.8 100.0 100.0 100.0 100.0 99.8 99.7 99.6 81.0 3.2 0.0 0.0

766.8 766.8 100.0 100.0 100.0 100.0 99.7 99.1 96.0 36.1 0.2 0.0 0.0

764.8 764.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 85.2 8.6 0.0 0.0

762.2 762.2 100.0 100.0 100.0 100.0 99.0 97.5 92.2 52.9 9.1 0.0 0.0

760.1 760.1 100.0 100.0 100.0 98.8 97.6 95.7 88.9 28.7 0.1 0.0 0.0

757.8 757.8 100.0 100.0 100.0 100.0 99.8 99.4 96.5 44.5 1.3 0.0 0.0

755.7 755.7 100.0 100.0 100.0 99.4 99.1 98.6 96.8 35.5 0.1 0.0 0.0

754.3ET 754.3 100.0 100.0 100.0 100.0 99.8 99.4 95.5 32.6 0.2 0.0 0.0

752.7 752.7 100.0 100.0 100.0 100.0 99.6 98.4 94.0 46.8 1.8 0.0 0.0

750.2 750.2 100.0 100.0 96.9 92.4 89.2 87.3 82.5 29.5 1.5 0.0 0.0

746.5 746.5 100.0 100.0 100.0 99.5 98.2 95.2 84.0 18.0 0.0 0.0 0.0

744.7 744.7 100.0 100.0 100.0 100.0 99.1 98.0 92.6 20.3 0.0 0.0 0.0

742 742 100.0 100.0 100.0 94.8 93.5 90.9 81.7 25.1 0.0 0.0 0.0

740.6 740.6 100.0 100.0 97.0 94.4 91.4 87.8 78.4 24.4 0.0 0.0 0.0
MRG&P Report No. 7 176

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

737.4 737.4 100.0 100.0 100.0 99.1 98.9 98.0 90.9 23.7 0.0 0.0 0.0

734.6 734.6 100.0 100.0 100.0 100.0 99.7 98.6 93.4 53.3 13.0 0.1 0.0

732.7 732.7 100.0 100.0 100.0 100.0 100.0 99.9 98.5 36.0 0.1 0.0 0.0

730.3ET 730.3 100.0 100.0 100.0 100.0 100.0 100.0 99.3 41.8 2.6 0.0 0.0

727.7 727.7 100.0 100.0 100.0 100.0 99.9 98.6 96.2 74.5 11.8 0.0 0.0

725 725 100.0 100.0 100.0 99.2 98.4 97.4 90.4 27.9 0.1 0.0 0.0

722.3 722.3 100.0 100.0 100.0 99.8 97.1 90.2 71.1 27.6 1.2 0.0 0.0

719.5 719.5 100.0 100.0 100.0 100.0 100.0 100.0 99.3 43.8 0.5 0.0 0.0

716.8 716.8 100.0 100.0 100.0 100.0 99.8 99.6 98.9 32.7 0.1 0.0 0.0

714.3 714.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.2 32.2 0.0 0.0

712.9 712.9 100.0 100.0 100.0 100.0 99.0 97.4 95.4 81.8 22.4 0.1 0.0

709.9 709.9 100.0 100.0 100.0 100.0 99.5 99.2 98.6 81.8 24.7 0.1 0.0

707.2 707.2 100.0 100.0 100.0 100.0 99.5 98.9 93.0 25.9 0.1 0.0 0.0

705.0BT 705 100.0 100.0 95.5 94.2 92.8 90.3 86.8 20.0 0.0 0.0 0.0

702.9 702.9 100.0 100.0 93.8 88.8 84.6 79.5 69.0 50.1 19.5 1.0 0.0

700.3 700.3 100.0 100.0 100.0 96.3 92.4 86.1 76.5 31.6 5.4 4.3 3.2

697.5 697.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 62.8 2.7 0.0 0.0

695.6 695.6 100.0 100.0 100.0 99.5 99.2 97.8 92.5 33.3 0.4 0.0 0.0

694 694 100.0 100.0 97.2 96.8 94.8 90.4 71.7 12.5 0.0 0.0 0.0

692 692 100.0 100.0 100.0 100.0 98.8 96.8 89.6 37.2 2.5 0.0 0.0

689.9 689.9 100.0 100.0 100.0 100.0 100.0 100.0 99.9 56.8 1.5 0.0 0.0

687.6 687.6 100.0 100.0 100.0 100.0 100.0 99.9 99.2 43.8 0.5 0.0 0.0

683.4 683.4 100.0 100.0 100.0 98.3 98.3 98.0 97.1 43.2 1.1 0.0 0.0

681.7ET 681.7 100.0 100.0 100.0 100.0 99.7 99.3 97.9 46.8 0.6 0.0 0.0

679.4 679.4 100.0 100.0 100.0 99.9 99.9 99.7 99.0 81.6 26.8 0.2 0.0

677.5 677.5 100.0 100.0 100.0 100.0 98.4 95.7 81.6 24.9 0.3 0.0 0.0

674.5 674.5 100.0 100.0 100.0 100.0 99.6 99.2 96.7 33.2 0.3 0.0 0.0

672.1 672.1 100.0 100.0 100.0 100.0 99.2 97.7 91.0 26.6 0.1 0.0 0.0

669.9DT 669.9 100.0 100.0 100.0 98.5 98.0 97.5 94.2 22.9 0.0 0.0 0.0

666.8 666.8 100.0 100.0 100.0 93.6 93.0 92.6 91.7 51.1 3.0 0.0 0.0

664.9 664.9 100.0 100.0 100.0 100.0 100.0 100.0 99.7 60.5 0.9 0.0 0.0

663.9 663.9 100.0 100.0 100.0 100.0 99.9 99.6 97.8 70.1 9.1 0.0 0.0

662.4 662.4 100.0 100.0 100.0 100.0 99.5 97.5 89.1 37.0 2.1 0.0 0.0

660.2ET 660.2 100.0 100.0 100.0 98.2 97.5 94.6 83.2 25.9 0.0 0.0 0.0

658.1 658.1 100.0 100.0 100.0 100.0 99.9 99.9 98.0 28.1 0.0 0.0 0.0

656.5 656.5 100.0 100.0 100.0 100.0 99.1 96.0 81.9 24.0 0.0 0.0 0.0

654.6 654.6 100.0 100.0 100.0 99.7 96.5 93.8 85.6 37.7 1.9 0.0 0.0
MRG&P Report No. 7 177

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

653.0CT 653 100.0 100.0 100.0 99.6 99.5 99.1 96.1 52.3 2.8 0.0 0.0

650.2 650.2 100.0 100.0 100.0 99.9 99.4 97.2 92.8 25.0 0.0 0.0 0.0

647.6 647.6 100.0 100.0 100.0 98.3 96.4 93.7 79.1 10.3 0.0 0.0 0.0

645.7 645.7 100.0 100.0 100.0 100.0 100.0 99.8 98.7 62.5 5.8 0.0 0.0

643.4 643.4 100.0 100.0 100.0 96.7 90.9 81.2 46.6 2.3 0.0 0.0 0.0

641 641 100.0 100.0 100.0 100.0 98.2 96.7 88.9 48.3 4.5 0.0 0.0

640 640 100.0 100.0 100.0 96.9 95.3 92.0 81.6 33.3 0.7 0.0 0.0

637.2AT 637.2 100.0 100.0 100.0 95.7 95.6 94.9 93.2 62.8 3.5 0.0 0.0

634.1 634.1 100.0 100.0 100.0 99.5 99.2 98.7 96.7 46.0 1.3 0.0 0.0

632.1 632.1 100.0 100.0 100.0 99.5 99.1 98.9 97.8 51.4 1.3 0.0 0.0

629.3 629.3 100.0 100.0 100.0 99.6 99.6 99.3 98.2 32.2 0.0 0.0 0.0

628 628 100.0 100.0 100.0 100.0 100.0 100.0 99.9 65.7 1.5 0.0 0.0

625.5 625.5 100.0 100.0 100.0 99.3 99.3 99.0 95.9 32.9 0.1 0.0 0.0

623.1 623.1 100.0 100.0 100.0 99.8 97.2 94.6 86.1 21.9 0.0 0.0 0.0

620.8 620.8 100.0 100.0 100.0 98.4 98.3 97.8 91.4 30.9 0.0 0.0 0.0

617.7 617.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 73.3 9.4 0.0 0.0

614.7 614.7 100.0 100.0 100.0 100.0 99.9 99.8 99.7 64.0 1.5 0.0 0.0

612.5AT 612.5 100.0 100.0 94.6 87.4 82.9 74.8 61.8 16.3 0.1 0.0 0.0

610 610 100.0 100.0 100.0 100.0 100.0 99.9 99.9 79.2 9.2 0.0 0.0

607.3 607.3 100.0 100.0 100.0 99.9 98.0 96.0 90.0 30.3 0.2 0.0 0.0

605.9 605.9 100.0 100.0 100.0 99.4 98.8 93.8 80.1 40.2 6.5 0.0 0.0

603.5 603.5 100.0 100.0 100.0 99.6 98.9 98.8 97.5 25.1 0.0 0.0 0.0

601 601 100.0 72.6 62.5 61.8 61.4 61.0 60.4 49.4 20.7 1.5 0.0

599.4 599.4 100.0 100.0 100.0 100.0 99.3 97.9 91.1 11.0 0.0 0.0 0.0

598.2ET 598.2 100.0 100.0 100.0 100.0 100.0 99.8 98.7 74.4 32.7 4.2 0.0

595.6AT 595.6 100.0 100.0 100.0 99.5 98.3 97.4 94.6 25.6 0.0 0.0 0.0

592.1 592.1 100.0 100.0 100.0 100.0 99.5 99.2 97.7 57.3 6.5 0.0 0.0

590.3DT 590.3 100.0 100.0 100.0 97.7 96.4 94.4 89.6 25.8 0.0 0.0 0.0

588.5 588.5 100.0 100.0 100.0 99.6 99.6 99.3 98.3 61.3 7.4 0.0 0.0

585.2 585.2 100.0 100.0 100.0 99.5 99.4 98.8 98.0 69.3 7.6 0.0 0.0

583.8 583.8 100.0 100.0 100.0 100.0 99.3 99.3 99.3 67.4 0.8 0.0 0.0

581.3 581.3 100.0 100.0 100.0 100.0 99.9 99.9 99.9 89.6 18.2 0.0 0.0

579.4 579.4 100.0 100.0 100.0 99.5 98.2 96.9 94.0 47.4 0.3 0.0 0.0

576.5 576.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 90.6 27.9 0.1 0.0

575 575 100.0 100.0 100.0 100.0 100.0 100.0 99.2 57.8 7.3 0.0 0.0

572.0AT 572 100.0 100.0 96.2 89.7 88.6 88.5 87.9 30.9 0.0 0.0 0.0

570 570 100.0 100.0 95.5 88.5 73.6 55.4 36.7 23.2 9.4 1.1 0.0
MRG&P Report No. 7 178

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

568.7ET 568.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.4

566.0CT 566 100.0 100.0 100.0 100.0 99.9 99.8 99.6 80.8 6.0 0.0 0.0

565.2 565.2 100.0 100.0 100.0 100.0 100.0 99.5 99.1 87.1 15.6 0.0 0.0

562.8 562.8 100.0 100.0 100.0 94.5 93.4 92.2 89.2 34.6 0.4 0.0 0.0

561.3 561.3 100.0 100.0 100.0 100.0 99.7 99.6 99.5 83.4 7.9 0.0 0.0

559.8 559.8 100.0 100.0 97.5 92.9 90.9 89.3 86.4 41.8 0.2 0.0 0.0

556.8 556.8 100.0 100.0 100.0 100.0 100.0 99.9 99.8 66.6 6.0 0.0 0.0

554.1 554.1 100.0 100.0 100.0 100.0 97.1 95.1 93.4 57.6 6.7 0.0 0.0

551.8ET 551.8 100.0 100.0 100.0 100.0 99.4 98.9 98.1 46.4 0.2 0.0 0.0

548.8 548.8 100.0 100.0 97.2 95.3 92.4 90.8 86.8 33.6 0.2 0.0 0.0

546.8 546.8 100.0 100.0 98.0 96.1 95.1 94.0 92.1 44.2 1.1 0.0 0.0

545 545 100.0 100.0 100.0 99.0 98.9 98.9 98.6 67.5 3.3 0.0 0.0

542.9 542.9 100.0 100.0 100.0 100.0 99.8 99.7 98.9 38.3 0.2 0.0 0.0

541.5 541.5 100.0 100.0 97.2 96.8 96.7 96.5 95.7 46.8 0.8 0.0 0.0

538.2 538.2 100.0 100.0 100.0 99.5 99.5 98.8 97.7 60.1 2.1 0.0 0.0

535.4 535.4 100.0 100.0 95.4 95.0 94.3 93.8 92.5 42.7 0.2 0.0 0.0

532.9DT 532.9 100.0 100.0 100.0 100.0 99.9 99.9 99.7 77.7 7.4 0.0 0.0

531.3CT 531.3 100.0 100.0 100.0 100.0 99.6 99.2 96.9 74.3 13.7 0.0 0.0

527.4 527.4 100.0 100.0 97.1 96.0 93.4 91.5 86.8 32.9 0.0 0.0 0.0

525.3BT 525.3 100.0 100.0 100.0 94.2 89.5 82.3 68.3 24.8 0.1 0.0 0.0

522.5 522.5 100.0 100.0 100.0 100.0 100.0 100.0 99.5 77.6 7.7 0.0 0.0

519.1 519.1 100.0 100.0 100.0 100.0 99.9 99.3 98.7 60.3 4.1 0.0 0.0

518.1 518.1 100.0 100.0 100.0 100.0 97.4 95.2 91.9 54.5 3.8 0.0 0.0

516 516 100.0 100.0 100.0 98.1 95.6 94.3 92.4 52.5 2.9 0.0 0.0

514.1 514.1 100.0 100.0 100.0 100.0 99.6 98.9 97.9 70.7 5.4 0.0 0.0

511.5 511.5 100.0 100.0 100.0 99.5 99.2 99.2 99.0 45.4 0.1 0.0 0.0

508.6 508.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 89.9 7.7 0.0 0.0

507 507 100.0 100.0 100.0 95.0 92.7 91.5 90.2 47.9 1.3 0.0 0.0

504.5 504.5 100.0 100.0 100.0 96.8 95.4 94.3 91.1 43.5 1.5 0.0 0.0

502.4ET 502.4 100.0 100.0 100.0 100.0 99.9 99.9 99.8 61.0 0.3 0.0 0.0

497.3 497.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 66.3 5.9 0.0 0.0

495.1 495.1 100.0 100.0 100.0 100.0 99.8 99.8 99.6 62.6 1.4 0.0 0.0

491.8 491.8 100.0 100.0 100.0 99.6 98.7 98.0 97.1 47.2 0.8 0.0 0.0

490 490 100.0 100.0 100.0 100.0 99.8 99.5 99.2 83.0 7.5 0.0 0.0

488.2 488.2 100.0 100.0 100.0 98.4 95.6 91.3 85.1 36.3 0.8 0.0 0.0

485.5 485.5 100.0 100.0 98.5 97.0 96.6 96.0 95.5 85.0 16.8 0.0 0.0

482.8 482.8 100.0 100.0 100.0 100.0 99.3 97.4 90.4 38.7 1.0 0.0 0.0
MRG&P Report No. 7 179

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

480.6 480.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.4 17.9 0.0 0.0

478.6 478.6 100.0 100.0 100.0 100.0 100.0 100.1 100.1 75.6 14.8 0.0 0.0

476.6CT 476.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.2 9.0 0.0 0.0

469.6 469.6 100.0 100.0 100.0 99.1 97.7 96.8 95.9 53.7 1.6 0.0 0.0

468.8 468.8 100.0 100.0 100.0 100.0 99.9 99.8 99.6 68.0 4.0 0.0 0.0

466.7 466.7 100.0 100.0 100.0 100.0 100.0 99.9 99.7 87.6 15.9 0.0 0.0

465.2 465.2 100.0 100.0 100.0 100.0 100.0 99.9 99.5 77.8 25.6 0.3 0.0

462 462 100.0 100.0 100.0 100.0 100.0 100.0 99.9 69.5 4.2 0.0 0.0

460.8 460.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 70.7 4.7 0.0 0.0

458.6 458.6 100.0 100.0 100.0 100.0 99.8 99.8 99.7 76.8 12.4 0.0 0.0

456.8 456.8 100.0 100.0 100.0 90.8 83.1 80.0 78.0 53.9 7.2 0.0 0.0

454.8 454.8 100.0 100.0 100.0 98.8 97.9 95.9 92.1 43.4 1.2 0.0 0.0

452.4DT 452.4 100.0 100.0 100.0 100.0 99.4 98.0 95.3 56.6 2.7 0.0 0.0

449.2 449.2 100.0 100.0 100.0 100.0 99.7 99.6 99.0 51.0 1.0 0.0 0.0

446.8 446.8 100.0 100.0 100.0 100.0 99.8 99.7 99.0 72.5 5.4 0.0 0.0

445.2 445.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.2 35.9 0.0 0.0

442.8 442.8 100.0 100.0 100.0 99.5 99.2 99.1 99.1 58.7 5.3 0.0 0.0

439.8 439.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 75.3 1.7 0.0 0.0

434.9 434.9 100.0 100.0 100.0 98.5 91.4 79.5 62.1 28.3 2.3 0.0 0.0

433.8BT 433.8 100.0 100.0 100.0 100.0 99.6 99.2 97.7 41.5 0.4 0.0 0.0

432 432 100.0 100.0 100.0 100.0 99.7 99.6 99.0 56.7 0.7 0.0 0.0

429.3 429.3 100.0 100.0 100.0 100.0 99.9 99.9 99.8 80.3 5.4 0.0 0.0

427.5ET 427.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.3 21.3 0.0 0.0

425.6 425.6 100.0 100.0 100.0 100.0 100.0 99.9 98.3 59.2 8.2 0.0 0.0

424 424 100.0 100.0 100.0 100.0 98.3 95.6 89.4 43.8 1.6 0.0 0.0

422.3 422.3 100.0 100.0 88.1 85.0 83.4 79.7 73.3 33.7 0.7 0.0 0.0

420.1 420.1 100.0 100.0 100.0 100.0 99.8 99.8 99.4 89.6 20.0 0.0 0.0

418.3 418.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 74.5 6.6 0.0 0.0

415 415 100.0 100.0 100.0 100.0 100.0 100.0 99.9 96.0 19.7 0.0 0.0

413.3 413.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 69.9 4.4 0.0 0.0

411.5 411.5 100.0 100.0 100.0 100.0 99.3 98.8 97.7 56.7 3.5 0.0 0.0

409.5 409.5 100.0 100.0 100.0 100.0 100.0 99.7 99.1 87.4 16.5 0.0 0.0

408.7AT 408.7 100.0 100.0 100.0 100.0 99.9 99.8 99.8 91.2 15.6 0.0 0.0

404.9 404.9 100.0 100.0 100.0 97.1 96.5 95.3 92.2 37.0 0.5 0.0 0.0

402.3 402.3 100.0 100.0 100.0 97.7 96.1 94.6 91.3 41.0 0.6 0.0 0.0

399.4 399.4 100.0 100.0 100.0 100.0 100.0 99.9 99.8 90.8 18.3 0.0 0.0

397.9 397.9 100.0 100.0 96.4 94.8 94.8 94.7 94.4 75.4 11.6 0.0 0.0
MRG&P Report No. 7 180

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

393.8 393.8 100.0 100.0 100.0 100.0 99.7 99.7 99.6 82.7 12.3 0.0 0.0

391 391 100.0 100.0 100.0 100.0 99.9 99.7 99.4 72.7 5.9 0.0 0.0

389.8 389.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.9 25.3 0.0 0.0

387 387 100.0 100.0 100.0 100.0 100.0 100.0 99.9 70.2 4.4 0.0 0.0

385 385 100.0 100.0 100.0 100.0 100.0 100.0 100.0 92.3 21.5 0.0 0.0

382.2CT 382.2 100.0 100.0 100.0 100.0 100.0 99.9 99.8 94.7 20.3 0.0 0.0

380 380 100.0 100.0 100.0 99.0 96.8 95.1 92.9 44.8 0.7 0.0 0.0

378.1 378.1 100.0 100.0 100.0 100.0 99.8 99.8 99.4 65.5 3.2 0.0 0.0

375.5 375.5 100.0 100.0 100.0 99.4 98.9 98.3 97.5 69.3 9.8 0.0 0.0

371.2 371.2 100.0 100.0 100.0 100.0 100.0 99.9 99.9 91.9 21.3 0.0 0.0

367.7 367.7 100.0 100.0 100.0 100.0 99.6 99.2 98.7 65.4 7.4 0.0 0.0

364.8 364.8 100.0 100.0 100.0 100.0 100.0 99.9 99.9 75.6 10.7 0.0 0.0

362.4AT 362.4 100.0 100.0 100.0 99.7 99.2 99.0 98.9 66.6 3.5 0.0 0.0

359.3 359.3 100.0 100.0 100.0 96.7 95.5 95.1 94.1 34.1 0.1 0.0 0.0

357 357 100.0 100.0 100.0 100.0 100.0 100.0 100.0 85.7 8.9 0.0 0.0

355.0ET 355 100.0 100.0 95.5 93.9 92.1 89.9 85.9 69.2 20.9 0.0 0.0

353.7 353.7 100.0 100.0 100.0 100.0 99.7 99.5 99.2 69.8 7.8 0.0 0.0

351.3 351.3 100.0 100.0 100.0 94.8 93.5 92.6 91.7 26.0 0.0 0.0 0.0

346.1 346.1 100.0 100.0 100.0 100.0 99.6 99.6 99.4 70.3 4.8 0.0 0.0

343.7 343.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.7 21.9 0.0 0.0

341.3 341.3 100.0 100.0 88.3 79.0 74.0 68.0 61.9 37.8 3.3 0.0 0.0

340 340 100.0 100.0 100.0 98.8 97.8 97.5 97.0 46.0 0.6 0.0 0.0

338 338 100.0 100.0 100.0 100.0 99.7 99.6 99.3 75.2 6.9 0.0 0.0

334.4 334.4 100.0 100.0 100.0 99.6 98.9 98.5 97.8 62.4 5.5 0.0 0.0

332.2AT 332.2 100.0 100.0 100.0 99.8 97.8 97.4 96.8 63.1 5.0 0.0 0.0

330.4 330.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 95.0 20.7 0.0 0.0

328.3 328.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.3 29.8 0.0 0.0

325.8 325.8 100.0 100.0 100.0 100.0 99.9 99.8 99.7 99.2 45.3 0.2 0.0

323.9 323.9 100.0 100.0 100.0 100.0 100.0 99.9 99.9 93.5 17.3 0.0 0.0

322.6 322.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 96.5 26.6 0.0 0.0

321.1 321.1 100.0 100.0 100.0 100.0 99.8 98.8 96.9 51.4 5.1 0.0 0.0

316 316 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.9 17.8 0.0 0.0

314.5 314.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 90.1 19.3 0.0 0.0

312.8ET 312.8 100.0 100.0 100.0 100.0 99.9 99.8 99.7 77.2 12.0 0.0 0.0

311.4 311.4 100.0 100.0 100.0 100.0 99.9 99.9 99.9 83.7 17.3 0.0 0.0

309.8 309.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 95.0 29.3 0.0 0.0

308.5 308.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 73.7 6.7 0.0 0.0
MRG&P Report No. 7 181

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

306.3 306.3 100.0 100.0 100.0 100.0 99.9 99.8 99.7 86.6 10.3 0.0 0.0

304.2 304.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 93.5 18.4 0.0 0.0

303.1 303.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 43.3 0.1 0.0

299.7 299.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 85.0 8.1 0.0 0.0

297.5 297.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.4 39.3 0.0 0.0

294.2 294.2 100.0 100.0 100.0 100.0 100.0 99.8 99.3 70.6 4.7 0.0 0.0

292.9AT 292.9 100.0 100.0 100.0 100.0 99.9 99.8 99.5 94.5 37.5 0.4 0.0

289.8 289.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 83.3 17.8 0.0 0.0

288.6 288.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 78.9 14.7 0.0 0.0

285.4 285.4 100.0 100.0 100.0 100.0 100.0 99.9 99.6 95.2 32.4 0.1 0.0

283.3 283.3 100.0 100.0 100.0 100.0 99.3 99.2 98.4 68.0 12.0 0.0 0.0

282 282 100.0 100.0 100.0 100.0 100.0 99.9 99.8 71.1 14.0 0.0 0.0

279.7 279.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 88.5 11.8 0.0 0.0

277.2 277.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 75.3 3.7 0.0 0.0

275.5 275.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 82.7 8.8 0.0 0.0

272.2 272.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 49.2 0.3 0.0

269.5DT 269.5 100.0 100.0 100.0 100.0 100.0 99.9 99.3 45.7 4.2 0.0 0.0

268.4 268.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 86.1 28.4 0.4 0.0

265.3 265.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 96.6 25.8 0.0 0.0

263 263 100.0 100.0 100.0 100.0 100.0 99.8 99.4 72.7 12.8 0.0 0.0

260.9 260.9 100.0 100.0 100.0 99.9 99.6 99.6 99.5 99.4 65.1 8.1 5.1

258.8 258.8 100.0 100.0 100.0 99.4 98.2 96.7 94.2 55.5 5.9 0.0 0.0

257.6 257.6 100.0 100.0 100.0 100.0 100.0 100.0 99.9 93.9 27.2 0.0 0.0

254.9 254.9 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.6 43.8 0.1 0.0

253 253 100.0 100.0 100.0 100.0 100.0 100.0 100.0 62.9 5.4 0.0 0.0

251 251 100.0 100.0 100.0 100.0 100.0 100.0 100.0 89.3 12.6 0.0 0.0

249.0DT 249 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.2 30.8 0.0 0.0

247.5 247.5 100.0 100.0 100.0 100.0 100.0 99.9 99.9 95.6 16.1 0.0 0.0

246 246 100.0 100.0 100.0 100.0 99.9 99.9 99.8 99.7 54.6 1.2 0.0

244.8 244.8 100.0 100.0 100.0 100.0 99.6 99.3 99.2 79.1 2.6 0.0 0.0

242.4 242.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.9 63.7 5.2 0.0

240.3 240.3 100.0 100.0 100.0 100.0 100.0 99.9 99.9 87.1 15.1 0.0 0.0

238.1 238.1 100.0 100.0 100.0 100.0 100.0 100.0 100.0 96.1 39.9 0.6 0.0

235 235 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 97.9 94.5

227.8 227.8 100.0 100.0 100.0 100.0 99.8 99.1 97.6 64.9 6.8 0.0 0.0

226.6 226.6 100.0 100.0 100.0 100.0 100.0 99.3 98.2 56.8 3.8 0.0 0.0

224.2 224.2 100.0 100.0 100.0 100.0 99.9 99.6 99.0 73.1 9.4 0.0 0.0
MRG&P Report No. 7 182

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

221.3DT 221.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.1 52.1 2.5 0.0

220 220 100.0 100.0 100.0 100.0 100.0 100.0 100.0 82.7 17.0 0.0 0.0

217.3 217.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 85.4 21.6 0.0 0.0

215.6 215.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 93.1 26.2 0.0 0.0

213.3 213.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.1 32.1 0.0 0.0

211.4 211.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 62.7 1.3 0.0

209 209 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 50.1 0.4 0.0

206.2 206.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 94.4 20.0 0.0 0.0

204.8 204.8 100.0 100.0 100.0 100.0 99.7 99.6 99.6 96.2 33.8 0.1 0.0

202.1 202.1 100.0 100.0 100.0 100.0 99.9 99.9 99.7 88.5 24.0 0.0 0.0

200.7AT 200.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.6 43.5 0.4 0.0

198.2 198.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 93.7 32.6 0.2 0.0

196.2 196.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 95.3 31.3 0.1 0.0

193.5 193.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 55.1 0.6 0.0

191.4 191.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 49.2 0.3 0.0

189.4 189.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 52.6 1.1 0.0

186.8 186.8 100.0 100.0 100.0 100.0 100.0 100.0 99.8 77.4 17.6 0.0 0.0

184.8 184.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 90.4 41.4 1.9 0.0

181.5 181.5 100.0 100.0 100.0 100.0 100.0 99.8 99.6 71.0 14.6 0.0 0.0

179.2 179.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.8 40.6 0.3 0.0

177.0ET 177 100.0 100.0 100.0 100.0 100.0 99.8 99.6 69.8 3.8 0.0 0.0

173.7 173.7 100.0 100.0 100.0 96.3 94.4 93.9 93.8 84.9 19.4 0.0 0.0

172 172 100.0 100.0 100.0 100.0 100.0 100.0 100.0 96.4 33.5 0.1 0.0

170.6 170.6 100.0 100.0 100.0 100.0 100.0 100.0 100.0 96.4 33.4 0.1 0.0

168.5 168.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 90.7 8.8 0.0 0.0

164.8 164.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 54.3 1.4 0.0

162.2 162.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 67.3 8.1 6.9

160.2 160.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.9 37.3 0.1 0.0

157.7 157.7 100.0 100.0 100.0 99.9 99.7 99.6 98.7 93.6 29.3 0.0 0.0

156.4 156.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.7 43.8 0.7 0.0

152.9CT 152.9 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.2 41.8 0.3 0.0

150 150 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.3 37.8 0.2 0.0

147.3 147.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.4 36.3 0.1 0.0

144.3 144.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.7 46.4 0.5 0.0

142.4 142.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 76.4 28.5 24.7

140.3 140.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 55.3 0.6 0.0

136.6 136.6 100.0 100.0 100.0 100.0 99.9 99.9 99.8 80.9 22.1 0.1 0.0
MRG&P Report No. 7 183

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

133.6 133.6 100.0 100.0 100.0 100.0 100.0 99.8 99.7 99.7 62.7 2.8 0.0

132 132 100.0 100.0 100.0 100.0 100.0 100.0 100.0 92.9 31.5 0.1 0.0

127.5 127.5 100.0 100.0 100.0 100.0 99.9 99.8 99.8 99.8 54.8 0.6 0.0

125.7 125.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 63.4 7.4 6.6

123.0CT 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 76.3 23.6 14.9

116.7 116.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 54.7 0.9 0.0

114.1 114.1 100.0 100.0 100.0 99.8 99.8 99.8 99.8 99.8 67.9 2.0 0.0

110 110 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.1 48.6 0.7 0.0

107.5 107.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.8 56.1 1.5 0.0

104.5 104.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 65.9 3.2 0.0

103 103 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.7 38.3 0.2 0.0

96.4 96.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.9 37.6 0.1 0.0

91.5 91.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 73.8 34.6 32.4

89.9DT 89.9 100.0 100.0 100.0 99.8 99.8 99.7 99.7 99.7 62.0 2.5 0.0

86 86 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 79.8 45.0 33.1

82.7 82.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.0 47.4 0.6 0.0

81.5 81.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.6 44.0 0.5 0.0

78 78 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 77.4 8.9 5.5

75.2 75.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 69.9 2.3 0.0

73.1 73.1 100.0 100.0 100.0 100.0 100.0 99.9 99.9 93.4 34.5 0.3 0.0

65.8 65.8 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 74.1 3.5 0.0

63 63 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 58.5 3.3 0.0

59 59 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 63.5 3.3 0.0

57.0DT 57 100.0 100.0 100.0 100.0 100.0 99.7 99.7 98.3 45.1 0.5 0.0

55.4 55.4 100.0 100.0 100.0 99.9 99.7 99.6 99.5 82.3 15.1 0.0 0.0

52.8 52.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 69.4 1.2 0.0

51.2 51.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 86.0 26.5 15.0

47.3 47.3 100.0 100.0 100.0 100.0 99.1 98.2 97.7 96.0 47.2 1.5 0.0

44.8 44.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 95.5 37.6 0.5 0.0

42.8 42.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 82.0 50.7 42.2

40 40 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.0 37.2 5.5 5.4

37 37 100.0 100.0 100.0 100.0 100.0 100.0 100.0 96.7 40.8 0.6 0.0

35.2 35.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 66.2 1.7 0.0

33.0BT 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 98.5 96.6 94.1

30.4 30.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 74.8 4.5 0.0

26 26 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.9 66.2 2.0 0.0

23.9 23.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 87.2 10.1 0.0
MRG&P Report No. 7 184

Sample 

Name 

River 

Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

21.9 21.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 62.9 7.6 5.7

18 18 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 92.6 83.6 80.5

13.5 13.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 96.8 84.8 79.2

11.9 11.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 89.4 48.9 42.5

5.5 5.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.8 95.7

2.8CT 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.7 96.4 90.4 80.1

Table D3 Particle size distributions of cross-channel samples using sieve (>2 mm) and LD (1 mm>), UMR Grafton 

to Cairo, IL. 

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U196D 196 100.0 100.0 100.0 100.0 100.0 99.9 98.9 58.9 7.6 0.0 0.0

U196B 196 100.0 100.0 100.0 100.0 99.3 98.3 93.1 32.0 0.2 0.0 0.0

U196A* 196 100.0 100.0 98.2 94.1 85.8 66.1 35.4 7.2 0.8 0.4 0.0

U195.5 

MOE 195.5 100.0 100.0 100.0 100.0 97.7 93.7 83.3 44.7 4.5 0.0 0.0

U195.5 

MOD 195.5 100.0 100.0 100.0 100.0 99.7 98.1 94.5 63.7 16.0 1.0 0.8

U195.5 

MOC 195.5 100.0 100.0 98.9 88.2 77.6 68.0 59.9 32.7 4.7 0.0 0.0

U195.5 

MOB 195.5 100.0 100.0 100.0 100.0 99.1 94.5 83.6 37.7 4.4 0.0 0.0

U194E 194 100.0 100.0 100.0 100.0 100.0 99.9 99.6 90.6 55.0 9.8 0.0

U194D 194 100.0 100.0 100.0 100.0 100.0 99.9 99.1 97.0 60.5 6.7 0.0

U194C 194 100.0 100.0 100.0 99.4 93.2 83.6 66.7 18.8 2.8 0.8 0.0

U194A 194 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.9 95.0 83.4 66.0

U183E 183 100.0 100.0 100.0 99.3 95.8 83.3 63.0 38.9 5.8 0.0 0.0

U183D 183 100.0 100.0 100.0 100.0 100.0 99.6 98.9 94.6 15.4 0.0 0.0

U183C 183 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.7 28.4 0.0 0.0

U183A 183 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.3 25.5 0.0 0.0

U174E 174 100.0 100.0 100.0 100.0 98.1 96.6 90.4 55.0 10.0 0.0 0.0

U174C 174 100.0 100.0 100.0 99.6 98.8 97.7 95.0 47.8 0.9 0.0 0.0

U174B 174 100.0 100.0 100.0 99.7 99.7 99.1 97.0 58.9 2.6 0.0 0.0

U174A 174 100.0 100.0 100.0 99.3 98.2 94.8 84.2 47.0 3.3 0.0 0.0

U160E 160 100.0 100.0 100.0 100.0 99.3 97.9 90.7 27.0 0.1 0.0 0.0

U160C 160 100.0 100.0 100.0 100.0 98.7 95.2 81.4 23.6 0.4 0.0 0.0

U160B 160 100.0 100.0 100.0 99.3 94.2 81.4 63.2 17.1 0.1 0.0 0.0
MRG&P Report No. 7 185

Sample 

Name 

River 

Mile 

above 

Cairo, IL 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

U131E 131 100.0 100.0 100.0 96.4 91.9 81.4 59.3 6.7 0.0 0.0 0.0

U131D 131 100.0 100.0 100.0 96.7 94.8 88.8 69.8 8.5 0.0 0.0 0.0

U131C 131 100.0 100.0 100.0 96.6 94.7 93.3 91.4 50.4 1.4 0.0 0.0

U131B 131 100.0 100.0 100.0 100.0 99.8 99.8 99.6 60.9 1.1 0.0 0.0

U117E 117 100.0 100.0 100.0 100.0 96.7 81.2 45.7 1.9 0.0 0.0 0.0

U117D 117 100.0 100.0 100.0 100.0 99.0 94.2 76.8 8.9 0.0 0.0 0.0

U117C 117 100.0 100.0 100.0 100.0 100.0 99.6 97.2 35.0 0.7 0.0 0.0

U117A 117 100.0 100.0 100.0 100.0 99.6 99.2 98.3 69.8 8.3 0.0 0.0

U79E 79 100.0 100.0 100.0 100.0 99.8 98.7 94.1 34.2 0.3 0.0 0.0

U79D 79 100.0 100.0 100.0 100.0 100.0 99.4 96.5 43.9 6.1 1.0 0.1

U79C 79 100.0 100.0 82.6 61.8 52.1 44.2 36.1 12.6 0.4 0.0 0.0

U79B 79 100.0 100.0 100.0 100.0 99.1 97.9 88.8 20.0 0.0 0.0 0.0

U30E 30 100.0 100.0 100.0 100.0 100.0 100.0 100.0 24.6 0.0 0.0 0.0

U30C 30 100.0 100.0 100.0 100.0 98.9 97.3 93.2 44.4 1.2 0.0 0.0

U30B 30 100.0 100.0 100.0 100.0 98.8 96.7 90.6 43.8 2.6 0.0 0.0

U30A 30 100.0 81.7 78.8 76.3 73.2 69.1 63.5 35.3 3.2 0.0 0.0

U1.5C 1.5 100.0 100.0 100.0 100.0 99.6 99.3 98.0 68.7 4.4 0.0 0.0

U1.5B 1.5 100.0 100.0 100.0 100.0 100.0 99.7 99.2 90.7 15.9 0.0 0.0

U1.5A 1.5 100.0 100.0 100.0 97.8 94.0 88.2 66.4 22.5 8.6 2.0 0.0

958.8B 958.8 100.0 100.0 100.0 99.2 93.7 78.8 49.0 11.5 0.0 0.0 0.0

958.8A 958.8 100.0 100.0 100.0 100.0 99.3 94.5 77.6 38.4 0.6 0.0 0.0

Table D4 . Particle size distributions of cross-channel samples using sieve (>2 mm) and LD (1 mm>), LMR Cairo, IL, 

to Head of Passes. 

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

952.6B 952.6 100.0 100.0 100.0 93.1 90.4 84.0 70.6 24.9 0.6 0.0 0.0

952.6C 952.6 100.0 100.0 100.0 100.0 99.5 98.7 96.3 72.2 17.8 0.0 0.0

952.6D 952.6 100.0 100.0 100.0 100.0 99.6 98.1 91.5 31.9 0.6 0.0 0.0

952.6E 952.6 100.0 100.0 100.0 100.0 98.7 96.0 87.0 31.3 0.3 0.0 0.0

935.2A 935.2 100.0 100.0 100.0 98.7 98.1 96.9 91.1 30.6 0.0 0.0 0.0

935.2B 935.2 100.0 100.0 77.7 74.7 73.0 72.1 68.2 23.1 0.1 0.0 0.0

933.0A 933 100.0 100.0 95.9 95.2 93.1 90.1 84.8 63.5 4.2 0.0 0.0

933.0B 933 100.0 91.4 82.6 77.7 75.3 72.4 65.1 24.4 0.1 0.0 0.0

933.0C 933 100.0 100.0 100.0 99.4 96.8 94.5 87.2 28.3 0.0 0.0 0.0

933.0E 933 100.0 100.0 100.0 100.0 99.5 97.9 87.5 19.1 0.0 0.0 0.0

926.7B 926.7 100.0 100.0 100.0 100.0 100.0 100.0 99.4 42.0 0.3 0.0 0.0
MRG&P Report No. 7 186

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

926.7C 926.7 100.0 100.0 100.0 100.0 100.0 99.5 96.2 53.5 12.7 2.7 0.1

915.4B 915.4 100.0 100.0 83.6 70.7 67.1 62.1 55.5 25.6 4.0 0.3 0.0

915.4C 915.4 100.0 100.0 100.0 99.7 99.5 98.5 95.4 49.0 3.5 0.0 0.0

915.4D 915.4 100.0 100.0 100.0 96.4 94.6 91.4 84.8 45.4 2.3 0.0 0.0

915.4E 915.4 100.0 100.0 94.8 93.1 91.9 90.2 87.1 51.3 2.0 0.0 0.0

897.9B 897.9 100.0 100.0 100.0 99.4 97.7 92.8 78.4 26.0 5.8 0.4 0.0

897.9C 897.9 100.0 100.0 100.0 100.0 99.6 99.2 97.6 78.5 28.0 0.7 0.0

897.9D 897.9 100.0 100.0 100.0 100.0 100.0 99.5 92.5 48.0 8.6 0.1 0.0

897.9E 897.9 100.0 100.0 100.0 99.4 97.6 94.5 85.0 43.0 8.0 3.8 2.4

879.8B 879.8 100.0 100.0 100.0 100.0 100.0 99.7 98.8 49.4 0.3 0.0 0.0

879.8C 879.8 100.0 100.0 100.0 100.0 99.1 97.3 91.0 30.7 0.0 0.0 0.0

879.8D 879.8 100.0 100.0 100.0 90.7 79.1 68.6 56.2 19.2 0.8 0.5 0.5

879.8E 879.8 100.0 100.0 100.0 100.0 99.7 97.7 91.6 30.2 0.4 0.0 0.0

862.7B 862.7 100.0 100.0 94.0 91.5 85.3 72.7 53.5 15.3 2.0 0.6 0.0

862.7C 862.7 100.0 100.0 100.0 100.0 100.0 99.8 99.2 94.2 37.9 0.4 0.0

862.7D 862.7 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.0 42.8 0.1 0.0

846.5B 846.5 100.0 100.0 100.0 100.0 99.9 99.6 97.9 20.6 0.0 0.0 0.0

846.5C 846.5 100.0 100.0 100.0 99.5 98.8 96.4 76.7 6.1 0.0 0.0 0.0

846.5D 846.5 100.0 100.0 88.1 64.4 52.3 41.1 24.2 4.7 1.1 0.4 0.0

846.5E 846.5 100.0 100.0 95.8 82.9 60.3 40.2 22.4 2.4 0.0 0.0 0.0

818.4B 818.4 100.0 100.0 100.0 99.1 97.6 92.4 74.9 29.0 1.0 0.0 0.0

818.4C 818.4 100.0 100.0 100.0 100.0 100.0 99.8 99.0 74.2 3.9 0.0 0.0

818.4D 818.4 100.0 100.0 100.0 100.0 99.7 99.0 95.0 40.1 0.9 0.0 0.0

818.4E 818.4 100.0 100.0 100.0 100.0 98.5 97.0 95.5 74.0 10.5 0.0 0.0

795.5B 795.5 100.0 100.0 100.0 99.5 99.5 99.2 97.4 43.1 2.8 0.0 0.0

795.5C 795.5 100.0 100.0 100.0 100.0 97.6 93.7 80.8 22.3 0.0 0.0 0.0

795.5D 795.5 100.0 100.0 100.0 100.0 97.0 89.9 77.9 24.0 0.0 0.0 0.0

795.5E 795.5 100.0 100.0 91.6 85.3 81.6 78.4 76.2 37.7 1.5 0.0 0.0

773.4A 773.4 100.0 100.0 100.0 100.0 99.6 98.2 88.2 29.1 0.1 0.0 0.0

773.4B 773.4 100.0 100.0 100.0 96.9 95.4 90.6 74.9 18.1 0.0 0.0 0.0

773.4C 773.4 100.0 100.0 100.0 99.3 97.6 95.0 86.2 29.0 0.1 0.0 0.0

773.4E 773.4 100.0 100.0 95.5 75.6 57.8 45.0 30.4 4.8 0.0 0.0 0.0

754.3A 754.3 100.0 100.0 100.0 91.5 81.5 66.7 51.2 22.8 4.7 1.6 0.9

754.3B 754.3 100.0 100.0 98.5 94.7 89.6 86.1 79.3 25.0 0.5 0.0 0.0

754.3C 754.3 100.0 100.0 100.0 99.0 98.6 97.3 92.3 31.8 0.5 0.0 0.0

754.3D 754.3 100.0 100.0 100.0 99.6 99.6 99.4 97.4 35.1 1.5 0.0 0.0

730.3B 730.3 100.0 100.0 97.6 94.8 92.2 85.6 69.5 7.4 0.0 0.0 0.0
MRG&P Report No. 7 187

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

730.3C 730.3 100.0 100.0 100.0 98.2 97.1 96.5 92.2 28.4 0.0 0.0 0.0

730.3D 730.3 100.0 100.0 100.0 100.0 99.7 99.4 96.6 37.1 0.5 0.0 0.0

705.0A 705 100.0 100.0 100.0 100.0 99.8 98.4 85.8 50.2 18.5 1.0 0.0

705.0C 705 100.0 100.0 100.0 100.0 99.9 99.9 99.7 48.6 0.3 0.0 0.0

705.0D 705 100.0 100.0 100.0 100.0 100.0 100.0 99.9 63.2 2.5 0.0 0.0

705.0E 705 100.0 100.0 100.0 99.3 98.0 96.7 94.4 50.6 4.2 0.0 0.0

681.7A 681.7 100.0 100.0 100.0 96.7 94.8 90.9 73.0 7.1 0.0 0.0 0.0

681.7B 681.7 100.0 100.0 100.0 98.3 97.7 96.0 86.3 9.4 0.0 0.0 0.0

681.7C 681.7 100.0 100.0 100.0 100.0 99.9 99.5 94.1 14.4 0.0 0.0 0.0

681.7D 681.7 100.0 100.0 100.0 100.0 99.9 99.9 99.7 53.3 1.1 0.0 0.0

669.9A 669.9 100.0 100.0 100.0 100.0 100.0 99.9 99.7 60.0 6.9 0.0 0.0

669.9B 669.9 100.0 100.0 100.0 100.0 100.0 100.0 99.6 52.6 4.3 0.0 0.0

669.9C 669.9 100.0 100.0 100.0 94.8 93.8 93.1 91.3 55.2 8.2 0.0 0.0

660.2A 660.2 100.0 100.0 100.0 100.0 99.9 99.8 99.0 27.6 0.0 0.0 0.0

660.2B 660.2 100.0 100.0 100.0 100.0 100.0 99.7 96.0 29.1 0.0 0.0 0.0

660.2C 660.2 100.0 100.0 100.0 100.0 100.0 99.8 98.2 34.7 0.1 0.0 0.0

660.2D 660.2 100.0 100.0 100.0 99.2 98.9 98.4 94.0 35.2 0.4 0.0 0.0

653.0A 653 100.0 100.0 100.0 98.2 98.1 98.1 96.3 24.2 0.0 0.0 0.0

653.0B 653 100.0 100.0 100.0 98.5 96.8 96.1 94.6 51.0 4.0 0.0 0.0

653.0D 653 100.0 100.0 100.0 100.0 99.9 99.8 98.5 34.9 0.3 0.0 0.0

653.0E 653 100.0 100.0 100.0 100.0 100.0 99.7 95.7 25.8 0.0 0.0 0.0

637.2B 637.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 40.5 0.3 0.0 0.0

637.2C 637.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 53.6 0.2 0.0 0.0

637.2D 637.2 100.0 100.0 100.0 99.6 99.5 98.4 92.0 43.0 14.4 9.8 7.6

637.2E 637.2 100.0 100.0 100.0 100.0 98.9 95.6 84.8 28.5 3.4 2.3 1.1

612.5B 612.5 100.0 100.0 100.0 98.1 98.1 98.0 97.6 44.0 0.1 0.0 0.0

612.5C 612.5 100.0 100.0 97.2 97.2 96.8 96.7 96.0 40.2 0.2 0.0 0.0

612.5D 612.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 67.7 15.6 0.2 0.0

598.2A 598.2 100.0 100.0 100.0 100.0 100.0 99.9 99.7 84.0 18.8 0.0 0.0

598.2B 598.2 100.0 100.0 100.0 100.0 100.0 100.0 99.8 76.9 12.1 0.0 0.0

598.2C 598.2 100.0 100.0 100.0 100.0 99.8 99.7 98.6 36.6 0.1 0.0 0.0

598.2D 598.2 100.0 100.0 100.0 97.7 94.2 92.5 88.1 47.3 3.5 0.0 0.0

595.6B 595.6 100.0 100.0 100.0 99.2 98.7 98.3 96.2 32.3 0.1 0.0 0.0

595.6C 595.6 100.0 100.0 100.0 100.0 100.0 99.5 97.3 34.2 0.0 0.0 0.0

595.6D 595.6 100.0 100.0 100.0 100.0 99.6 99.2 97.8 52.5 1.4 0.0 0.0

595.6E 595.6 100.0 100.0 100.0 100.0 100.0 99.8 99.2 60.9 4.2 0.0 0.0

590.3A 590.3 100.0 100.0 97.1 92.7 90.2 87.7 82.3 19.1 0.0 0.0 0.0
MRG&P Report No. 7 188

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

590.3B 590.3 100.0 100.0 100.0 99.6 99.2 98.5 95.8 26.6 0.0 0.0 0.0

590.3C 590.3 100.0 100.0 100.0 100.0 99.4 99.0 97.4 29.0 0.0 0.0 0.0

590.3E 590.3 100.0 100.0 100.0 100.0 100.0 99.9 99.3 71.2 12.8 0.0 0.0

572.0B 572 100.0 100.0 100.0 100.0 100.0 100.0 99.9 78.9 12.9 0.0 0.0

572.0C 572 100.0 100.0 100.0 100.0 99.8 99.6 98.6 61.9 23.3 6.3 0.0

572.0D 572 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 97.7 87.1 61.7

568.7B 568.7 100.0 100.0 100.0 49.1 39.0 26.5 0.0 0.0 0.0 0.0 0.0

568.7C 568.7 100.0 100.0 100.0 100.0 99.9 99.9 99.5 65.1 3.0 0.0 0.0

568.7D 568.7 100.0 100.0 100.0 99.3 97.5 95.1 91.0 10.1 0.0 0.0 0.0

566.0A 566 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.3 87.6 74.2 60.3

566.0B 566 100.0 100.0 100.0 100.0 100.0 100.0 100.0 72.1 10.5 0.0 0.0

566.0D 566 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.6 83.6 53.5

551.8A 551.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 88.0 57.3 37.7 29.2

551.8B 551.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 61.9 7.6 0.0 0.0

551.8C 551.8 100.0 100.0 100.0 99.4 99.4 99.4 99.3 58.2 5.7 0.0 0.0

551.8D 551.8 100.0 100.0 100.0 98.0 97.1 95.4 92.5 51.6 1.5 0.0 0.0

532.9A 532.9 100.0 100.0 100.0 100.0 100.0 99.9 99.8 76.9 16.4 0.0 0.0

532.9B 532.9 100.0 100.0 100.0 100.0 99.9 99.7 99.0 75.4 17.0 1.4 1.4

532.9C 532.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 93.5 24.5 0.0 0.0

531.3A 531.3 100.0 100.0 100.0 99.4 99.2 98.9 98.2 85.0 15.7 0.0 0.0

531.3B 531.3 100.0 100.0 100.0 100.0 100.0 99.9 99.9 89.7 19.5 0.0 0.0

525.3A 525.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 29.4 0.1 0.0 0.0

525.3C 525.3 100.0 100.0 96.9 94.8 91.3 86.3 76.5 22.1 0.0 0.0 0.0

525.3D 525.3 100.0 100.0 100.0 96.9 91.6 85.8 76.6 22.0 0.0 0.0 0.0

525.3E 525.3 100.0 100.0 97.6 95.8 95.2 94.8 93.1 33.7 0.0 0.0 0.0

502.4A 502.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 69.0 16.9 3.8 3.7

502.4B 502.4 100.0 100.0 100.0 95.1 92.5 90.9 88.5 55.8 11.1 0.0 0.0

502.4C 502.4 100.0 100.0 97.0 96.6 95.8 94.6 92.2 74.4 16.3 0.0 0.0

502.4D 502.4 100.0 100.0 100.0 100.0 99.8 99.8 99.5 91.0 21.0 0.0 0.0

476.6D 476.6 100.0 100.0 100.0 100.0 99.9 99.7 98.3 64.3 6.1 0.0 0.0

476.6E 476.6 100.0 100.0 100.0 100.0 99.6 99.4 98.9 54.7 1.4 0.0 0.0

452.4A 452.4 100.0 100.0 100.0 100.0 100.0 99.8 99.2 78.3 8.0 0.0 0.0

452.4B 452.4 100.0 100.0 100.0 100.0 100.0 99.1 96.9 69.0 5.6 0.0 0.0

452.4C 452.4 100.0 100.0 100.0 100.0 100.0 100.0 99.9 82.7 10.6 0.0 0.0

433.8C 433.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 63.6 1.3 0.0 0.0

433.8E 433.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 77.5 4.1 0.0 0.0

427.5A 427.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 89.1 23.8 0.0 0.0
MRG&P Report No. 7 189

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

427.5B 427.5 100.0 100.0 100.0 100.0 100.0 99.9 99.5 70.3 15.9 0.0 0.0

427.5C 427.5 100.0 100.0 100.0 100.0 99.7 99.4 98.0 79.5 19.0 0.0 0.0

427.5D 427.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.1 24.8 0.0 0.0

408.7B 408.7 100.0 100.0 100.0 100.0 100.0 99.9 99.8 87.3 16.6 0.0 0.0

408.7C 408.7 100.0 100.0 100.0 100.0 99.8 99.4 98.3 57.7 6.2 0.0 0.0

408.7D 408.7 100.0 100.0 100.0 100.0 99.0 97.8 95.9 56.8 6.1 0.0 0.0

408.7E 408.7 100.0 100.0 97.2 91.4 88.3 84.8 80.5 40.9 1.3 0.0 0.0

382.2A 382.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 49.4 2.7 0.0 0.0

382.2B 382.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 67.6 3.8 0.0 0.0

382.2D 382.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 78.8 8.4 0.0 0.0

382.2E 382.2 100.0 100.0 100.0 100.0 99.7 99.6 99.3 81.9 9.1 0.0 0.0

362.4B 362.4 100.0 100.0 100.0 98.8 97.8 97.7 97.3 70.4 9.6 0.0 0.0

362.4C 362.4 100.0 100.0 100.0 99.0 98.4 97.9 96.2 48.2 2.2 0.0 0.0

362.4D 362.4 100.0 100.0 100.0 100.0 100.0 99.9 99.9 51.9 1.0 0.0 0.0

362.4E 362.4 100.0 100.0 100.0 100.0 100.0 100.0 100.0 63.5 1.3 0.0 0.0

355.0A 355 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.8 96.1 93.8 90.2

355.0B 355 100.0 100.0 100.0 100.0 99.2 99.1 99.0 48.8 1.9 0.0 0.0

355.0C 355 100.0 100.0 94.0 86.9 84.4 83.5 83.1 76.2 28.3 0.2 0.0

355.0D 355 100.0 100.0 100.0 98.1 97.9 97.5 97.2 63.3 5.8 0.0 0.0

332.2B 332.2 100.0 100.0 100.0 100.0 100.0 99.9 99.8 93.2 22.3 0.0 0.0

332.2C 332.2 100.0 100.0 100.0 100.0 100.0 99.8 99.8 85.4 20.1 0.0 0.0

332.2D 332.2 100.0 100.0 100.0 100.0 100.0 100.0 100.0 88.4 16.9 0.0 0.0

332.2E 332.2 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.7 49.6 0.3 0.0

312.8A 312.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 53.3 0.4 0.0

312.8B 312.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 49.2 0.6 0.0

312.8C 312.8 100.0 100.0 100.0 100.0 99.8 99.7 99.5 93.0 29.1 0.1 0.0

312.8D 312.8 100.0 100.0 100.0 100.0 100.0 99.7 98.9 69.0 13.3 0.0 0.0

292.9B 292.9 100.0 100.0 100.0 100.0 99.8 99.8 99.7 94.1 20.5 0.0 0.0

292.9C 292.9 100.0 100.0 100.0 100.0 99.5 99.4 99.3 77.9 7.8 0.0 0.0

292.9D 292.9 100.0 100.0 93.5 79.2 76.6 75.3 74.9 60.7 8.0 0.0 0.0

292.9E 292.9 100.0 100.0 100.0 99.4 98.7 98.2 96.6 39.8 0.3 0.0 0.0

269.5A 269.5 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 97.8 91.9 74.1

269.5B 269.5 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.5 52.2 2.1 0.0

269.5C 269.5 100.0 100.0 100.0 100.0 99.8 99.7 99.4 93.9 37.4 0.4 0.0

249.0A 249 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.8 72.0 56.8

249.0B 249 100.0 100.0 100.0 100.0 100.0 100.0 99.9 99.9 61.8 1.2 0.0

249.0C 249 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 43.8 0.1 0.0
MRG&P Report No. 7 190

Sample 

Name 

River Mile 

above 

Head of 

Passes 

— Percent finer than indicated size — 

63.5 

mm 

31.75 

mm 

16.00 

mm 

8.00 

mm 

4.00 

mm 

2.00 

mm 

1.00 

mm 

0.50 

mm 

0.25 

mm 

0.125 

mm 

0.063 

mm 

221.3A 221.3 100.0 100.0 100.0 100.0 99.6 98.6 95.9 51.2 6.3 5.8 5.3

221.3B 221.3 100.0 100.0 100.0 100.0 100.0 100.0 99.9 72.5 44.5 43.7 41.8

221.3C 221.3 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.5 95.9 90.5

200.7B 200.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 86.5 20.5 0.0 0.0

200.7C 200.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.2 14.8 0.0 0.0

200.7D 200.7 100.0 100.0 100.0 100.0 100.0 100.0 100.0 84.1 7.7 0.0 0.0

200.7E 200.7 100.0 100.0 100.0 100.0 100.0 99.9 99.9 72.8 5.2 0.0 0.0

177.0A 177 100.0 100.0 100.0 100.0 100.0 99.9 99.9 99.8 59.3 1.9 0.0

177.0B 177 100.0 100.0 100.0 100.0 100.0 100.0 99.9 98.2 41.9 0.4 0.0

177.0C 177 100.0 100.0 100.0 100.0 100.0 99.9 99.9 94.6 29.0 0.0 0.0

177.0D 177 100.0 100.0 100.0 100.0 100.0 100.0 100.0 95.8 23.8 0.0 0.0

152.9B 152.9 100.0 100.0 100.0 99.9 99.8 99.8 99.7 98.3 44.8 0.6 0.0

152.9D 152.9 100.0 100.0 100.0 99.5 99.2 99.0 98.3 85.4 22.3 0.0 0.0

123.0B 123 100.0 100.0 100.0 99.9 99.9 99.9 99.9 95.9 40.8 0.6 0.0

123.0D 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.3 97.9 94.5

123.0E 123 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 97.0 91.3 83.9

89.9B 89.9 100.0 100.0 100.0 100.0 99.7 99.6 99.1 40.4 0.1 0.0 0.0

89.9C 89.9 100.0 100.0 100.0 100.0 99.9 99.8 99.8 97.2 43.1 0.8 0.0

89.9E 89.9 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 79.0 41.8 29.5

57.0A 57 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 80.4 43.1 32.5

57.0B 57 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 86.9 59.5 51.5

57.0E 57 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.3 92.9 90.8 86.5

33.0A 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 76.0 4.9 0.0

33.0C 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 83.6 21.0 13.7

33.0D 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 91.2 52.0 28.2

33.0E 33 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 98.6 83.9 55.6

2.8A 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 83.9 45.2 33.1

2.8B 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.6 94.5 86.1 78.3

2.8D 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 90.8 9.3 0.0

2.8E 2.8 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 87.3 57.0 47.0

 
MRG&P Report No. 7 191

Table D5. Computed statistics for the 2013 samples using sieve (>2 mm) and LD (1 mm>). 

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

U204 1162.5 0.2 0.6 0.8 2.0 0.5

U199 1157.5 0.4 0.8 19.4 13.6 6.3

U196A 1154.5 0.7 1.4 3.7 2.4 2.7

U196B 1154.5 0.4 0.6 0.9 1.4 0.7

U196CT 1154.5 0.3 0.4 0.6 1.5 0.5

U196D 1154.5 0.3 0.5 0.7 1.5 0.5

U195.5 MOAT 1154.0 0.4 0.5 0.7 1.4 0.6

U195.5 MOD 1154.0 0.3 0.4 0.7 1.7 0.6

U195.5 MOE 1154.0 0.3 0.5 1.0 1.8 0.9

U195.5 MOB 1154.0 0.4 0.6 1.0 1.7 0.8

U195.5 MOC 1154.0 0.4 0.7 6.1 5.2 2.9

U194D 1152.5 0.2 0.2 0.3 1.5 0.3

U194E 1152.5 0.1 0.2 0.4 1.7 0.3

U194BT 1152.5 0.4 1.5 7.9 4.3 4.1

U194C 1152.5 0.5 0.8 2.1 2.1 1.4

U194A 1152.5 0.0 0.0 0.1 3.8 0.1

U192.5 1151.0 0.2 0.5 1.7 2.7 1.5

U191 1149.5 0.4 0.6 0.8 1.5 0.7

U190 1148.5 0.4 0.7 2.1 2.3 3.4

U189 1147.5 0.3 0.5 0.7 1.4 0.7

U188 1146.5 0.4 0.6 0.8 1.4 0.7

U187 1145.5 0.8 1.7 5.7 2.8 4.4

U186 1144.5 0.5 0.8 2.1 2.0 2.8

U185 1143.5 0.3 0.5 0.8 1.6 0.8

U184 1142.5 0.4 0.6 1.1 1.8 1.0

U183.5 1142.0 0.3 0.3 0.4 1.3 0.4

U183D 1141.5 0.3 0.3 0.4 1.3 0.4

U183C 1141.5 0.2 0.3 0.4 1.3 0.3

U183BT 1141.5 0.2 0.3 0.4 1.3 0.3

U183A 1141.5 0.2 0.3 0.4 1.3 0.3

U183E 1141.5 0.3 0.6 2.1 2.6 1.3

U182 1140.5 0.2 0.3 0.4 1.3 0.3

U180 1138.5 0.2 0.5 1.1 2.2 0.7

U177.5 1136.2 0.4 0.6 0.9 1.5 1.1

U175 1133.5 0.4 0.6 1.0 1.6 1.2

U174E 1132.5 0.3 0.5 0.8 1.7 0.7

U174DT 1132.5 0.4 0.6 1.0 1.5 1.3
MRG&P Report No. 7 192

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

U174C 1132.5 0.4 0.5 0.7 1.4 0.7

U174B 1132.5 0.3 0.5 0.7 1.4 0.6

U174A 1132.5 0.3 0.5 1.0 1.7 0.9

U170 1128.5 0.5 0.8 1.6 1.8 1.3

U165 1123.5 0.3 0.6 1.0 1.7 0.9

U160.5AT 1119.0 0.1 0.2 0.3 1.4 0.2

U160B 1118.5 0.5 0.8 2.3 2.2 1.5

U160E 1118.5 0.4 0.6 0.9 1.5 0.8

U160DT 1118.5 0.3 0.5 1.3 2.0 1.3

U160C 1118.5 0.4 0.7 1.1 1.6 0.9

U155 1113.5 0.4 0.6 1.0 1.7 0.9

U150 1108.5 0.6 1.1 4.8 3.2 2.7

U145 1103.5 1.2 3.2 9.2 2.8 5.4

U140 1098.5 0.8 1.5 3.5 2.1 2.4

U135 1093.5 0.7 1.5 4.0 2.4 2.4

U131AT 1089.5 0.3 0.5 0.8 1.5 0.6

U131B 1089.5 0.3 0.5 0.6 1.3 0.5

U131C 1089.5 0.4 0.5 0.8 1.5 1.1

U131D 1089.5 0.6 0.8 1.7 1.8 1.5

U131E 1089.5 0.6 0.9 2.4 2.1 1.8

U125 1083.5 0.4 0.6 1.0 1.6 1.0

U120 1078.5 0.6 0.9 1.9 1.8 1.5

U117.5 1076.0 0.0 0.0 0.0 2.8 0.0

U117E 1075.5 0.7 1.1 2.3 1.8 1.5

U117D 1075.5 0.6 0.8 1.3 1.5 1.0

U117C 1075.5 0.4 0.6 0.8 1.4 0.6

U117BT 1075.5 0.6 1.5 8.5 4.0 4.2

U117A 1075.5 0.3 0.4 0.6 1.5 0.5

U115 1073.5 0.2 0.3 0.7 1.8 0.7

U110 1068.5 0.4 0.5 0.8 1.5 0.7

U105 1063.5 0.3 0.4 0.6 1.4 0.6

U100 1058.5 0.4 0.6 1.0 1.7 1.7

U95 1053.5 0.2 0.3 0.4 1.3 0.4

U90 1048.5 0.3 0.5 1.0 1.8 1.1

U85 1043.5 0.4 0.6 0.9 1.5 0.7

U79AT 1037.5 0.4 0.6 0.9 1.6 0.8

U79B 1037.5 0.5 0.7 0.9 1.4 0.8

U79C 1037.5 0.6 3.3 17.9 5.7 7.8
MRG&P Report No. 7 193

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

U79D 1037.5 0.3 0.5 0.8 1.6 0.6

U79E 1037.5 0.4 0.6 0.8 1.4 0.7

U75 1033.5 0.3 0.5 0.8 1.6 0.7

U70 1028.5 0.4 0.6 18.3 16.4 5.2

U65 1023.5 0.4 0.8 16.9 11.8 5.8

U60 1018.5 0.4 0.6 0.9 1.4 0.8

U55 1013.5 0.5 0.7 1.0 1.5 0.8

U50 1008.5 0.6 0.9 1.9 1.8 1.6

U45 1003.5 0.9 1.7 5.8 2.7 3.8

U40 998.5 0.3 0.5 0.7 1.4 0.6

U35 993.5 0.4 0.6 1.0 1.5 0.9

U30B 988.5 0.4 0.5 0.9 1.6 0.7

U30C 988.5 0.4 0.5 0.8 1.5 0.7

U30DT 988.5 0.4 1.2 18.2 9.1 6.3

U30E 988.5 0.5 0.6 0.8 1.3 0.7

U30A 988.5 0.4 0.7 35.0 27.7 10.4

U25 983.5 0.4 0.5 0.8 1.5 1.3

U20 978.5 1.2 2.7 7.7 2.5 5.0

U15 973.5 0.2 0.4 0.7 1.7 0.5

U10 968.5 0.2 0.4 0.7 1.7 0.6

U05 963.5 0.3 0.6 6.2 6.1 3.6

U1.5A 960.0 0.4 0.8 1.7 2.1 1.4

U1.5B 960.0 0.3 0.3 0.5 1.3 0.4

U1.5C 960.0 0.3 0.4 0.6 1.4 0.5

U1.5DT 960.0 0.3 0.4 0.6 1.3 0.5

958.8A 958.8 0.4 0.6 1.3 1.9 0.9

958.8B 958.8 0.6 1.0 2.5 2.2 1.6

958.8CT 958.8 0.4 6.2 15.0 8.3 8.3

955.7 955.7 3.1 8.0 13.9 2.2 9.1

952.6AT 952.6 0.3 0.6 1.8 2.6 1.3

952.6C 952.6 0.2 0.4 0.6 1.6 0.5

952.6D 952.6 0.4 0.6 0.9 1.5 0.7

952.6E 952.6 0.4 0.6 0.9 1.5 0.8

952.6B 952.6 0.4 0.7 2.0 2.2 1.8

951.4 951.4 0.5 0.8 1.5 1.7 1.2

949.2 949.2 0.5 0.6 0.9 1.4 0.8

947.3 947.3 0.4 0.6 0.8 1.4 0.7

945 945.0 0.3 0.4 0.7 1.5 0.6
MRG&P Report No. 7 194

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

942.8 942.8 0.4 0.6 0.9 1.5 0.9

941.2 941.2 0.4 0.6 1.0 1.6 1.4

938.8 938.8 0.2 0.4 0.6 1.6 0.6

937 937.0 0.3 0.6 0.9 1.6 0.7

935.2A 935.2 0.4 0.6 0.9 1.4 0.9

935.2B 935.2 0.4 0.7 23.6 17.2 6.3

935.2CT 935.2 0.6 0.8 1.7 1.8 1.3

933.0A 933.0 0.3 0.4 0.8 1.6 1.8

933.0B 933.0 0.4 0.7 17.9 13.4 7.5

933.0C 933.0 0.4 0.6 0.9 1.5 1.0

933.0DT 933.0 0.5 0.7 1.8 1.9 3.0

933.0E 933.0 0.5 0.7 1.0 1.4 0.8

931 931.0 0.3 0.4 0.6 1.4 1.4

929.1 929.1 0.3 0.5 0.8 1.6 0.8

927.9 927.9 0.3 0.5 0.8 1.7 0.9

926.7AT 926.7 0.5 0.9 3.2 2.7 2.6

926.7B 926.7 0.4 0.5 0.7 1.4 0.6

926.7C 926.7 0.3 0.5 0.8 1.7 0.6

924.5 924.5 0.4 0.6 1.0 1.6 1.1

923 923.0 0.3 0.5 0.8 1.6 0.7

919.1 919.1 0.4 0.6 1.1 1.8 1.1

917.1 917.1 0.3 0.7 6.2 5.8 3.5

916.8 916.8 0.3 0.4 0.7 1.5 0.6

915.4AT 915.4 0.8 1.9 5.6 2.7 3.6

915.4B 915.4 0.4 0.9 16.6 10.8 6.2

915.4C 915.4 0.3 0.5 0.8 1.5 0.6

915.4D 915.4 0.4 0.5 1.0 1.7 1.2

915.4E 915.4 0.3 0.5 0.8 1.6 2.1

913.5 913.5 0.4 0.6 1.0 1.6 0.8

911.9 911.9 0.3 0.4 0.6 1.4 0.6

909.8 909.8 0.3 0.5 0.7 1.6 0.6

908.1 908.1 0.4 0.6 1.0 1.6 2.6

905.9 905.9 0.4 0.7 1.8 2.2 1.3

904.6 904.6 0.6 0.9 3.8 2.9 2.5

902.3 902.3 0.4 0.6 0.8 1.4 0.7

901 901.0 0.5 0.7 1.0 1.4 0.9

898.9 898.9 0.5 0.7 0.9 1.4 0.8

897.9AT 897.9 0.7 1.3 3.5 2.3 2.3
MRG&P Report No. 7 195

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

897.9C 897.9 0.2 0.3 0.6 1.6 0.4

897.9D 897.9 0.3 0.5 0.8 1.7 0.6

897.9E 897.9 0.3 0.6 1.0 1.7 0.9

897.9B 897.9 0.4 0.7 1.3 1.8 1.0

896.7 896.7 0.4 0.7 1.2 1.7 1.2

894.8 894.8 0.4 0.6 0.9 1.5 0.7

893.5 893.5 0.4 0.5 0.7 1.3 0.6

891.8 891.8 0.4 0.6 0.9 1.5 0.9

890.5 890.5 0.4 0.5 0.7 1.4 0.6

888.3 888.3 0.6 0.9 1.8 1.8 1.4

886.4 886.4 0.4 0.6 0.9 1.5 0.8

884 884.0 0.6 1.0 7.1 4.5 3.1

882.2 882.2 0.4 0.5 0.6 1.3 0.5

879.8C 879.8 0.4 0.6 0.9 1.4 0.8

879.8B 879.8 0.4 0.5 0.7 1.3 0.6

879.8D 879.8 0.5 0.9 5.4 4.0 2.7

879.8E 879.8 0.4 0.6 0.9 1.5 0.7

879.8AT 879.8 0.4 0.5 0.7 1.4 0.9

878.1 878.1 0.2 0.3 0.4 1.3 0.3

877 877.0 0.3 0.6 1.2 2.0 1.0

875.7 875.7 0.5 0.8 1.6 1.8 1.3

873.7 873.7 0.4 0.5 0.8 1.4 0.6

871 871.0 0.3 0.6 0.9 1.6 0.7

870 870.0 0.4 0.6 0.9 1.5 0.8

867.3 867.3 0.3 0.4 0.5 1.3 0.4

865.7 865.7 0.5 0.8 1.5 1.7 1.1

864.5 864.5 0.3 0.5 0.7 1.6 0.6

862.7ET 862.7 0.4 0.5 0.8 1.5 0.6

862.7D 862.7 0.2 0.3 0.4 1.3 0.3

862.7C 862.7 0.2 0.3 0.4 1.4 0.3

862.7B 862.7 0.5 0.9 3.7 2.9 3.1

860.4 860.4 0.4 0.6 1.0 1.5 0.9

858.6 858.6 0.3 0.4 0.7 1.6 0.5

857 857.0 0.3 0.6 1.2 1.8 0.9

856 856.0 0.5 0.8 1.1 1.5 0.9

855 855.0 0.5 0.7 1.0 1.4 0.8

853 853.0 0.4 0.6 0.9 1.4 0.8

851 851.0 0.4 0.6 1.3 1.9 1.1
MRG&P Report No. 7 196

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

849.4 849.4 0.5 0.7 0.9 1.4 0.8

848.2 848.2 0.6 1.1 3.1 2.3 2.6

846.5AT 846.5 0.4 0.6 1.1 1.7 0.8

846.5B 846.5 0.5 0.6 0.8 1.3 0.7

846.5C 846.5 0.6 0.8 1.3 1.5 1.0

846.5D 846.5 0.8 3.5 14.2 4.3 7.2

846.5E 846.5 0.8 2.8 8.5 3.2 4.9

844.6 844.6 0.4 0.6 0.9 1.5 0.9

842.5 842.5 0.5 0.6 0.9 1.4 0.7

840.1 840.1 0.5 0.7 1.3 1.6 1.1

835.5 835.5 0.5 0.8 2.4 2.3 1.8

833.6 833.6 0.4 0.6 0.8 1.5 0.7

831 831.0 0.3 0.5 0.8 1.5 0.6

828 828.0 0.4 0.6 0.9 1.5 1.0

825.4 825.4 0.5 0.7 1.0 1.4 0.9

822 822.0 0.3 0.4 0.6 1.4 0.5

818.4E 818.4 0.3 0.4 0.6 1.5 0.6

818.4AT 818.4 0.6 2.0 13.1 5.0 5.9

818.4B 818.4 0.4 0.7 1.4 1.9 1.1

818.4C 818.4 0.3 0.4 0.6 1.3 0.5

818.4D 818.4 0.4 0.6 0.8 1.5 0.7

816.2 816.2 0.6 0.8 1.6 1.6 2.0

814.8 814.8 0.5 0.6 0.8 1.3 0.7

813 813.0 0.3 0.5 0.7 1.5 0.6

810.6 810.6 0.3 0.4 0.6 1.4 0.5

807.9 807.9 0.6 0.9 1.8 1.8 1.4

804.5 804.5 0.4 0.6 0.8 1.4 0.7

802.1 802.1 0.3 0.4 0.5 1.3 0.4

799 799.0 0.4 0.6 0.9 1.5 0.7

797.5 797.5 0.4 0.5 0.7 1.4 0.6

795.5AT 795.5 0.4 0.6 0.8 1.4 0.7

795.5B 795.5 0.4 0.5 0.8 1.5 0.7

795.5C 795.5 0.5 0.7 1.2 1.6 1.0

795.5D 795.5 0.5 0.7 1.4 1.8 1.1

795.5E 795.5 0.4 0.6 6.3 6.1 3.5

792.5 792.5 0.4 0.6 0.8 1.5 0.7

789.5 789.5 0.4 0.5 0.8 1.4 0.7

788 788.0 0.4 0.6 0.9 1.5 0.8
MRG&P Report No. 7 197

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

786.2 786.2 0.5 0.7 1.0 1.4 0.9

783.4 783.4 0.6 0.8 1.3 1.5 1.0

780.2 780.2 0.3 0.4 0.6 1.4 0.5

778.2 778.2 0.3 0.5 0.7 1.5 0.6

777 777.0 0.3 0.4 0.7 1.6 0.6

775.2 775.2 0.4 0.5 0.8 1.5 0.6

773.4DT 773.4 0.6 1.0 3.7 2.7 3.2

773.4E 773.4 0.7 2.6 10.7 3.9 5.3

773.4A 773.4 0.4 0.6 0.9 1.5 0.8

773.4B 773.4 0.5 0.7 1.5 1.8 1.3

773.4C 773.4 0.4 0.6 1.0 1.5 0.9

771.9 771.9 0.5 0.7 1.5 1.7 1.1

770.3 770.3 0.5 0.7 1.1 1.5 0.9

768.8 768.8 0.3 0.4 0.5 1.3 0.5

766.8 766.8 0.4 0.6 0.8 1.4 0.7

764.8 764.8 0.3 0.4 0.5 1.3 0.4

762.2 762.2 0.3 0.5 0.8 1.7 0.7

760.1 760.1 0.4 0.6 0.9 1.5 0.9

757.8 757.8 0.4 0.5 0.8 1.4 0.6

755.7 755.7 0.4 0.6 0.8 1.4 0.7

754.3A 754.3 0.4 1.0 4.7 3.6 2.6

754.3B 754.3 0.4 0.7 1.6 2.0 1.8

754.3C 754.3 0.4 0.6 0.9 1.5 0.8

754.3D 754.3 0.4 0.6 0.8 1.5 0.7

754.3ET 754.3 0.4 0.6 0.8 1.4 0.7

752.7 752.7 0.4 0.5 0.8 1.5 0.7

750.2 750.2 0.4 0.6 1.2 1.8 2.1

746.5 746.5 0.5 0.7 1.0 1.4 1.0

744.7 744.7 0.5 0.7 0.9 1.4 0.8

742 742.0 0.4 0.6 1.2 1.6 1.4

740.6 740.6 0.5 0.7 1.5 1.9 2.0

737.4 737.4 0.5 0.6 0.9 1.4 0.8

734.6 734.6 0.3 0.5 0.8 1.7 0.6

732.7 732.7 0.4 0.6 0.8 1.4 0.6

730.3B 730.3 0.6 0.8 1.9 1.9 2.0

730.3C 730.3 0.4 0.6 0.9 1.4 1.0

730.3D 730.3 0.4 0.6 0.8 1.4 0.7

730.3ET 730.3 0.4 0.5 0.8 1.5 0.6
MRG&P Report No. 7 198

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

727.7 727.7 0.3 0.4 0.6 1.5 0.5

725 725.0 0.4 0.6 0.9 1.4 0.9

722.3 722.3 0.4 0.7 1.6 2.0 1.1

719.5 719.5 0.4 0.5 0.7 1.4 0.6

716.8 716.8 0.4 0.6 0.8 1.4 0.6

714.3 714.3 0.2 0.3 0.4 1.4 0.3

712.9 712.9 0.2 0.3 0.5 1.5 0.5

709.9 709.9 0.2 0.3 0.5 1.5 0.4

707.2 707.2 0.4 0.6 0.9 1.4 0.7

705.0A 705.0 0.2 0.5 1.0 2.0 0.7

705.0BT 705.0 0.5 0.7 1.0 1.4 2.0

705.0C 705.0 0.4 0.5 0.7 1.3 0.6

705.0D 705.0 0.3 0.5 0.6 1.4 0.5

705.0E 705.0 0.3 0.5 0.8 1.5 0.7

702.9 702.9 0.2 0.5 3.7 4.8 2.9

700.3 700.3 0.4 0.6 1.7 2.2 1.5

697.5 697.5 0.3 0.5 0.6 1.4 0.5

695.6 695.6 0.4 0.6 0.9 1.5 0.8

694 694.0 0.5 0.8 1.6 1.7 1.7

692 692.0 0.4 0.6 0.9 1.6 0.8

689.9 689.9 0.3 0.5 0.6 1.4 0.5

687.6 687.6 0.4 0.5 0.7 1.4 0.6

683.4 683.4 0.4 0.5 0.8 1.4 0.8

681.7ET 681.7 0.4 0.5 0.7 1.4 0.6

681.7C 681.7 0.5 0.7 0.9 1.3 0.8

681.7D 681.7 0.4 0.5 0.7 1.4 0.6

681.7A 681.7 0.6 0.8 1.5 1.6 1.4

681.7B 681.7 0.5 0.7 1.0 1.3 1.1

679.4 679.4 0.2 0.3 0.5 1.6 0.4

677.5 677.5 0.4 0.7 1.1 1.6 0.9

674.5 674.5 0.4 0.6 0.8 1.4 0.7

672.1 672.1 0.4 0.6 0.9 1.4 0.8

669.9DT 669.9 0.5 0.6 0.9 1.4 0.9

669.9A 669.9 0.3 0.5 0.7 1.5 0.5

669.9B 669.9 0.3 0.5 0.7 1.5 0.5

669.9C 669.9 0.3 0.5 0.8 1.6 1.2

666.8 666.8 0.3 0.5 0.8 1.5 1.3

664.9 664.9 0.4 0.5 0.6 1.3 0.5
MRG&P Report No. 7 199

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

663.9 663.9 0.3 0.4 0.6 1.5 0.5

662.4 662.4 0.4 0.6 0.9 1.6 0.7

660.2ET 660.2 0.4 0.6 1.1 1.5 1.0

660.2D 660.2 0.4 0.6 0.8 1.4 0.8

660.2C 660.2 0.4 0.6 0.8 1.4 0.6

660.2B 660.2 0.4 0.6 0.8 1.4 0.7

660.2A 660.2 0.5 0.6 0.8 1.3 0.7

658.1 658.1 0.4 0.6 0.8 1.3 0.7

656.5 656.5 0.5 0.7 1.1 1.6 0.9

654.6 654.6 0.4 0.6 1.0 1.6 0.9

653.0A 653 0.5 0.6 0.8 1.4 0.9

653.0B 653 0.3 0.5 0.8 1.5 0.8

653.0CT 653 0.3 0.5 0.7 1.5 0.6

653.0D 653.0 0.4 0.6 0.8 1.4 0.6

653.0E 653.0 0.5 0.6 0.8 1.4 0.7

650.2 650.2 0.5 0.6 0.9 1.4 0.8

647.6 647.6 0.5 0.8 1.3 1.5 1.2

645.7 645.7 0.3 0.4 0.7 1.5 0.5

643.4 643.4 0.7 1.1 2.5 1.9 1.9

641 641.0 0.3 0.5 0.9 1.6 0.7

640 640.0 0.4 0.6 1.2 1.7 1.2

637.2AT 637.2 0.3 0.4 0.7 1.4 1.0

637.2B 637.2 0.4 0.5 0.7 1.4 0.6

637.2C 637.2 0.4 0.5 0.6 1.3 0.5

637.2D 637.2 0.3 0.6 0.9 1.8 0.7

637.2E 637.2 0.4 0.7 1.0 1.6 0.8

634.1 634.1 0.4 0.5 0.7 1.4 0.7

632.1 632.1 0.4 0.5 0.7 1.4 0.6

629.3 629.3 0.4 0.6 0.8 1.3 0.7

628 628 0.3 0.4 0.6 1.3 0.5

625.5 625.5 0.4 0.6 0.8 1.4 0.7

623.1 623.1 0.5 0.7 1.0 1.4 1.0

620.8 620.8 0.4 0.6 0.9 1.4 0.9

617.7 617.7 0.3 0.4 0.6 1.4 0.5

614.7 614.7 0.3 0.5 0.6 1.3 0.5

612.5AT 612.5 0.5 0.8 4.8 3.7 3.3

612.5B 612.5 0.4 0.5 0.7 1.3 0.8

612.5C 612.5 0.4 0.5 0.8 1.4 1.3
MRG&P Report No. 7 200

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

612.5D 612.5 0.3 0.4 0.6 1.6 0.5

610 610.0 0.3 0.4 0.5 1.4 0.4

607.3 607.3 0.4 0.6 0.9 1.5 0.8

605.9 605.9 0.3 0.6 1.2 1.9 0.9

603.5 603.5 0.5 0.6 0.8 1.4 0.8

601 601.0 0.2 0.5 42.7 42.7 15.8

599.4 599.4 0.5 0.7 0.9 1.3 0.8

598.2A 598.2 0.2 0.3 0.5 1.4 0.4

598.2B 598.2 0.3 0.4 0.6 1.4 0.4

598.2C 598.2 0.4 0.6 0.8 1.4 0.6

598.2D 598.2 0.3 0.5 0.9 1.6 1.1

598.2ET 598.2 0.2 0.3 0.6 1.8 0.4

595.6AT 595.6 0.5 0.6 0.9 1.4 0.8

595.6B 595.6 0.4 0.6 0.8 1.4 0.8

595.6C 595.6 0.4 0.6 0.8 1.4 0.6

595.6D 595.6 0.4 0.5 0.7 1.4 0.6

595.6E 595.6 0.3 0.5 0.6 1.4 0.5

592.1 592.1 0.3 0.5 0.7 1.5 0.6

590.3E 590.3 0.3 0.4 0.6 1.5 0.5

590.3DT 590.3 0.4 0.6 0.9 1.4 1.1

590.3C 590.3 0.4 0.6 0.8 1.4 0.7

590.3B 590.3 0.4 0.6 0.8 1.4 0.8

590.3A 590.3 0.5 0.7 1.2 1.6 2.1

588.5 588.5 0.3 0.4 0.7 1.5 0.6

585.2 585.2 0.3 0.4 0.6 1.4 0.6

583.8 583.8 0.3 0.4 0.6 1.3 0.5

581.3 581.3 0.2 0.3 0.5 1.4 0.4

579.4 579.4 0.4 0.5 0.7 1.4 0.7

575 575 0.3 0.5 0.7 1.5 0.5

576.5 576.5 0.2 0.3 0.5 1.4 0.4

572.0C 572 0.2 0.4 0.7 1.9 0.5

572.0B 572 0.3 0.4 0.5 1.4 0.4

572.0AT 572 0.4 0.6 0.9 1.5 2.3

572.0D 572 0.0 0.0 0.1 3.6 0.1

570 570 0.4 1.6 6.5 4.3 3.8

568.7ET 568.7 0.0 0.0 0.0 10.1 0.0

568.7D 568.7 0.5 0.7 0.9 1.3 1.0

568.7C 568.7 0.3 0.4 0.6 1.4 0.5
MRG&P Report No. 7 201

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

568.7B 568.7 1.5 8.3 33.3 4.7 7.5

566.0B 566 0.3 0.4 0.6 1.5 0.5

566.0CT 566 0.3 0.4 0.5 1.3 0.4

566.0D 566 0.0 0.1 0.1 3.6 0.1

566.0A 566 0.0 0.0 0.2 4.7 0.1

565.2 565.2 0.3 0.3 0.5 1.4 0.4

562.8 562.8 0.4 0.6 0.9 1.5 1.3

561.3 561.3 0.3 0.4 0.5 1.3 0.4

559.8 559.8 0.4 0.5 0.9 1.5 1.8

556.8 556.8 0.3 0.4 0.6 1.4 0.5

554.1 554.1 0.3 0.5 0.7 1.5 0.7

551.8ET 551.8 0.4 0.5 0.7 1.3 0.6

551.8D 551.8 0.4 0.5 0.7 1.4 0.9

551.8C 551.8 0.3 0.5 0.7 1.5 0.6

551.8B 551.8 0.3 0.4 0.7 1.5 0.5

551.8A 551.8 0.0 0.2 0.5 6.6 0.3

548.8 548.8 0.4 0.6 0.9 1.5 1.7

546.8 546.8 0.4 0.5 0.8 1.5 1.3

545 545 0.3 0.4 0.6 1.4 0.6

542.9 542.9 0.4 0.6 0.8 1.4 0.6

541.5 541.5 0.4 0.5 0.7 1.4 1.3

538.2 538.2 0.3 0.5 0.6 1.4 0.6

535.4 535.4 0.4 0.5 0.8 1.4 1.8

532.9A 532.9 0.2 0.4 0.6 1.5 0.4

532.9DT 532.9 0.3 0.4 0.5 1.4 0.5

532.9C 532.9 0.2 0.3 0.4 1.4 0.4

532.9B 532.9 0.2 0.4 0.6 1.5 0.4

531.3CT 531.3 0.3 0.4 0.6 1.5 0.5

531.3B 531.3 0.2 0.3 0.5 1.4 0.4

531.3A 531.3 0.3 0.4 0.5 1.4 0.5

527.4 527.4 0.4 0.6 0.9 1.5 1.6

525.3C 525.3 0.5 0.7 1.7 2.0 2.0

525.3BT 525.3 0.4 0.7 2.4 2.5 1.8

525.3A 525.3 0.4 0.6 0.8 1.4 0.6

525.3D 525.3 0.5 0.7 1.7 2.0 1.5

525.3E 525.3 0.4 0.6 0.8 1.4 1.4

522.5 522.5 0.3 0.4 0.5 1.4 0.4

519.1 519.1 0.3 0.5 0.7 1.4 0.5
MRG&P Report No. 7 202

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

518.1 518.1 0.3 0.5 0.8 1.5 0.7

516 516 0.3 0.5 0.8 1.5 0.9

514.1 514.1 0.3 0.4 0.6 1.4 0.5

511.5 511.5 0.4 0.5 0.7 1.3 0.7

508.6 508.6 0.3 0.4 0.5 1.3 0.4

507 507 0.4 0.5 0.8 1.5 1.3

504.5 504.5 0.4 0.5 0.8 1.5 1.1

502.4ET 502.4 0.4 0.5 0.6 1.3 0.5

502.4D 502.4 0.2 0.3 0.5 1.4 0.4

502.4C 502.4 0.3 0.4 0.6 1.6 1.3

502.4B 502.4 0.3 0.5 0.8 1.7 1.3

502.4A 502.4 0.2 0.4 0.6 1.6 0.5

497.3 497.3 0.3 0.4 0.6 1.4 0.5

495.1 495.1 0.3 0.5 0.6 1.3 0.5

491.8 491.8 0.4 0.5 0.7 1.4 0.7

490 490 0.3 0.4 0.5 1.3 0.4

488.2 488.2 0.4 0.6 1.0 1.6 1.1

485.5 485.5 0.2 0.3 0.5 1.4 1.0

482.8 482.8 0.4 0.6 0.9 1.5 0.7

480.6 480.6 0.2 0.3 0.4 1.3 0.4

478.6 478.6 0.3 0.4 0.6 1.5 0.4

476.6CT 476.6 0.3 0.4 0.5 1.3 0.4

476.6D 476.6 0.3 0.4 0.6 1.5 0.5

476.6E 476.6 0.3 0.5 0.7 1.4 0.6

469.6 469.6 0.3 0.5 0.7 1.4 0.7

468.8 468.8 0.3 0.4 0.6 1.4 0.5

466.7 466.7 0.3 0.3 0.5 1.4 0.4

465.2 465.2 0.2 0.3 0.6 1.6 0.4

462 462 0.3 0.4 0.6 1.4 0.5

460.8 460.8 0.3 0.4 0.6 1.4 0.5

458.6 458.6 0.3 0.4 0.6 1.4 0.5

456.8 456.8 0.3 0.5 4.3 5.3 2.1

454.8 454.8 0.4 0.5 0.8 1.5 0.8

452.4A 452.4 0.3 0.4 0.5 1.4 0.4

452.4B 452.4 0.3 0.4 0.6 1.4 0.5

452.4C 452.4 0.3 0.4 0.5 1.4 0.4

452.4DT 452.4 0.3 0.5 0.7 1.4 0.6

449.2 449.2 0.4 0.5 0.7 1.4 0.6
MRG&P Report No. 7 203

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

446.8 446.8 0.3 0.4 0.6 1.4 0.5

445.2 445.2 0.2 0.3 0.4 1.3 0.3

442.8 442.8 0.3 0.5 0.7 1.5 0.6

439.8 439.8 0.3 0.4 0.5 1.3 0.5

434.9 434.9 0.4 0.7 2.6 2.7 1.6

433.8E 433.8 0.3 0.4 0.5 1.3 0.5

433.8BT 433.8 0.4 0.5 0.8 1.4 0.6

433.8C 433.8 0.3 0.5 0.6 1.3 0.5

433.8D 433.8 0.3 0.4 0.6 1.3 0.5

432 432 0.4 0.5 0.6 1.3 0.6

429.3 429.3 0.3 0.4 0.5 1.3 0.4

427.5D 427.5 0.2 0.3 0.4 1.3 0.3

427.5ET 427.5 0.2 0.3 0.4 1.3 0.3

427.5C 427.5 0.2 0.4 0.5 1.5 0.4

427.5A 427.5 0.2 0.3 0.5 1.4 0.4

427.5B 427.5 0.3 0.4 0.6 1.6 0.5

425.6 425.6 0.3 0.5 0.7 1.5 0.5

424 424.0 0.4 0.5 0.8 1.5 0.8

422.3 422.3 0.4 0.6 5.2 5.0 3.9

420.1 420.1 0.2 0.3 0.5 1.4 0.4

418.3 418.3 0.3 0.4 0.6 1.4 0.5

415 415.0 0.2 0.3 0.4 1.3 0.4

413.3 413.3 0.3 0.4 0.6 1.4 0.5

411.5 411.5 0.3 0.5 0.7 1.5 0.6

409.5 409.5 0.2 0.3 0.5 1.4 0.4

408.7AT 408.7 0.3 0.3 0.5 1.3 0.4

408.7B 408.7 0.2 0.3 0.5 1.4 0.4

408.7C 408.7 0.3 0.5 0.7 1.5 0.6

408.7D 408.7 0.3 0.5 0.7 1.5 0.6

408.7E 408.7 0.4 0.6 1.8 2.3 2.2

404.9 404.9 0.4 0.6 0.8 1.5 1.0

402.3 402.3 0.4 0.5 0.8 1.5 1.0

399.4 399.4 0.2 0.3 0.5 1.4 0.4

397.9 397.9 0.3 0.4 0.6 1.5 1.5

393.8 393.8 0.3 0.4 0.5 1.4 0.4

391 391 0.3 0.4 0.6 1.4 0.5

389.8 389.8 0.2 0.3 0.4 1.4 0.4

387 387 0.3 0.4 0.6 1.4 0.5
MRG&P Report No. 7 204

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

385 385 0.2 0.3 0.4 1.4 0.4

382.2E 382.2 0.3 0.4 0.5 1.4 0.4

382.2D 382.2 0.3 0.4 0.5 1.4 0.4

382.2CT 382.2 0.2 0.3 0.4 1.3 0.4

382.2B 382.2 0.3 0.4 0.6 1.4 0.5

382.2A 382.2 0.3 0.5 0.7 1.5 0.6

380 380.0 0.4 0.5 0.8 1.4 0.9

378.1 378.1 0.3 0.4 0.6 1.4 0.5

375.5 375.5 0.3 0.4 0.6 1.5 0.6

371.2 371.2 0.2 0.3 0.4 1.4 0.4

367.7 367.7 0.3 0.4 0.6 1.5 0.5

364.8 364.8 0.3 0.4 0.6 1.4 0.4

362.4AT 362.4 0.3 0.4 0.6 1.4 0.6

362.4B 362.4 0.3 0.4 0.6 1.5 0.7

362.4C 362.4 0.4 0.5 0.8 1.5 0.7

362.4D 362.4 0.4 0.5 0.7 1.4 0.6

362.4E 362.4 0.3 0.5 0.6 1.3 0.5

359.3 359.3 0.4 0.6 0.8 1.4 1.1

357 357.0 0.3 0.4 0.5 1.3 0.4

355.0D 355.0 0.3 0.4 0.6 1.5 0.7

355.0C 355.0 0.2 0.3 3.0 5.4 2.8

355.0A 355.0 0.0 0.0 0.0 2.7 0.1

355.0B 355.0 0.4 0.5 0.7 1.4 0.6

355.0ET 355.0 0.2 0.4 0.8 1.9 1.8

353.7 353.7 0.3 0.4 0.6 1.4 0.5

351.3 351.3 0.5 0.6 0.8 1.3 1.3

346.1 346.1 0.3 0.4 0.6 1.4 0.5

343.7 343.7 0.2 0.3 0.4 1.4 0.4

341.3 341.3 0.4 0.6 11.6 10.1 4.8

340 340 0.4 0.5 0.7 1.4 0.8

338 338 0.3 0.4 0.6 1.4 0.5

334.4 334.4 0.3 0.4 0.7 1.5 0.6

332.2AT 332.2 0.3 0.4 0.6 1.4 0.6

332.2B 332.2 0.2 0.3 0.4 1.4 0.4

332.2C 332.2 0.2 0.3 0.5 1.4 0.4

332.2D 332.2 0.2 0.3 0.5 1.4 0.4

332.2E 332.2 0.2 0.3 0.3 1.3 0.3

330.4 330.4 0.2 0.3 0.4 1.3 0.4
MRG&P Report No. 7 205

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

328.3 328.3 0.2 0.3 0.4 1.3 0.3

325.8 325.8 0.2 0.3 0.3 1.3 0.3

323.9 323.9 0.2 0.3 0.4 1.3 0.4

322.6 322.6 0.2 0.3 0.4 1.3 0.3

321.1 321.1 0.3 0.5 0.7 1.5 0.6

316 316.0 0.2 0.3 0.4 1.4 0.4

314.5 314.5 0.2 0.3 0.5 1.4 0.4

312.8A 312.8 0.2 0.2 0.3 1.3 0.3

312.8B 312.8 0.2 0.3 0.3 1.4 0.3

312.8C 312.8 0.2 0.3 0.4 1.4 0.4

312.8D 312.8 0.3 0.4 0.6 1.5 0.5

312.8ET 312.8 0.3 0.4 0.5 1.4 0.4

311.4 311.4 0.2 0.4 0.5 1.4 0.4

309.8 309.8 0.2 0.3 0.4 1.4 0.3

308.5 308.5 0.3 0.4 0.6 1.4 0.5

306.3 306.3 0.3 0.4 0.5 1.3 0.4

304.2 304.2 0.2 0.3 0.4 1.3 0.4

303.1 303.1 0.2 0.3 0.4 1.3 0.3

299.7 299.7 0.3 0.4 0.5 1.3 0.4

297.5 297.5 0.2 0.3 0.4 1.3 0.3

294.2 294.2 0.3 0.4 0.6 1.4 0.5

292.9AT 292.9 0.2 0.3 0.4 1.4 0.3

292.9B 292.9 0.2 0.3 0.4 1.3 0.4

292.9C 292.9 0.3 0.4 0.5 1.4 0.5

292.9D 292.9 0.3 0.4 10.1 12.4 3.8

292.9E 292.9 0.4 0.5 0.8 1.4 0.7

289.8 289.8 0.2 0.4 0.5 1.4 0.4

288.6 288.6 0.3 0.4 0.5 1.5 0.4

285.4 285.4 0.2 0.3 0.4 1.4 0.3

283.3 283.3 0.3 0.4 0.6 1.5 0.5

282 282.0 0.3 0.4 0.6 1.5 0.5

279.7 279.7 0.3 0.4 0.5 1.3 0.4

277.2 277.2 0.3 0.4 0.6 1.3 0.5

275.5 275.5 0.3 0.4 0.5 1.4 0.4

272.2 272.2 0.2 0.3 0.3 1.3 0.3

269.5A 269.5 0.0 0.0 0.1 2.4 0.1

269.5B 269.5 0.2 0.2 0.4 1.4 0.3

269.5C 269.5 0.2 0.3 0.4 1.4 0.3
MRG&P Report No. 7 206

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

269.5DT 269.5 0.3 0.5 0.8 1.5 0.6

268.4 268.4 0.2 0.3 0.5 1.5 0.4

265.3 265.3 0.2 0.3 0.4 1.3 0.3

263 263.0 0.3 0.4 0.6 1.5 0.5

260.9 260.9 0.2 0.2 0.3 1.4 0.3

258.8 258.8 0.3 0.5 0.7 1.5 0.7

257.6 257.6 0.2 0.3 0.4 1.4 0.3

254.9 254.9 0.2 0.3 0.3 1.3 0.3

253 253.0 0.3 0.4 0.6 1.4 0.5

251 251.0 0.3 0.4 0.5 1.3 0.4

249.0B 249 0.2 0.2 0.3 1.3 0.3

249.0C 249 0.2 0.3 0.4 1.3 0.3

249.0DT 249 0.2 0.3 0.4 1.3 0.3

249.0A* 249 0.0 0.0 0.2 4.5 0.1

247.5 247.5 0.3 0.3 0.4 1.3 0.4

246 246.0 0.2 0.2 0.3 1.4 0.3

244.8 244.8 0.3 0.4 0.5 1.3 0.5

242.4 242.4 0.2 0.2 0.3 1.4 0.3

240.3 240.3 0.3 0.3 0.5 1.4 0.4

238.1 238.1 0.2 0.3 0.4 1.4 0.3

235 235.0 0.0 0.0 0.0 2.9 0.0

227.8 227.8 0.3 0.4 0.6 1.5 0.5

226.6 226.6 0.3 0.5 0.7 1.4 0.6

224.2 224.2 0.3 0.4 0.6 1.4 0.5

221.3A 221.3 0.3 0.5 0.7 1.4 0.6

221.3B 221.3 0.0 0.3 0.6 14.2 0.3

221.3C 221.3 0.0 0.0 0.0 3.1 0.0

221.3DT 221.3 0.2 0.2 0.4 1.5 0.3

220 220 0.2 0.4 0.5 1.4 0.4

217.3 217.3 0.2 0.3 0.5 1.5 0.4

215.6 215.6 0.2 0.3 0.4 1.4 0.4

213.3 213.3 0.2 0.3 0.4 1.3 0.3

211.4 211.4 0.2 0.2 0.3 1.3 0.3

209 209.0 0.2 0.3 0.3 1.3 0.3

206.2 206.2 0.2 0.3 0.4 1.3 0.4

204.8 204.8 0.2 0.3 0.4 1.4 0.3

202.1 202.1 0.2 0.3 0.5 1.4 0.4

200.7AT 200.7 0.2 0.3 0.4 1.4 0.3
MRG&P Report No. 7 207

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

200.7B 200.7 0.2 0.3 0.5 1.4 0.4

200.7C 200.7 0.3 0.3 0.5 1.3 0.4

200.7D 200.7 0.3 0.4 0.5 1.3 0.4

200.7E 200.7 0.3 0.4 0.6 1.4 0.5

198.2 198.2 0.2 0.3 0.4 1.4 0.3

196.2 196.2 0.2 0.3 0.4 1.4 0.3

193.5 193.5 0.2 0.2 0.3 1.3 0.3

191.4 191.4 0.2 0.3 0.3 1.3 0.3

189.4 189.4 0.2 0.2 0.3 1.4 0.3

186.8 186.8 0.2 0.4 0.6 1.5 0.4

184.8 184.8 0.2 0.3 0.4 1.6 0.3

181.5 181.5 0.3 0.4 0.6 1.5 0.5

179.2 179.2 0.2 0.3 0.4 1.4 0.3

177.0A 177 0.2 0.2 0.3 1.4 0.3

177.0B 177 0.2 0.3 0.4 1.4 0.3

177.0C 177 0.2 0.3 0.4 1.4 0.3

177.0D 177.0 0.2 0.3 0.4 1.3 0.3

177.0ET 177.0 0.3 0.4 0.6 1.4 0.5

173.7 173.7 0.2 0.3 0.5 1.4 0.9

172 172.0 0.2 0.3 0.4 1.4 0.3

170.6 170.6 0.2 0.3 0.4 1.4 0.3

168.5 168.5 0.3 0.4 0.5 1.3 0.4

164.8 164.8 0.2 0.2 0.3 1.4 0.3

162.2 162.2 0.2 0.2 0.3 1.4 0.2

160.2 160.2 0.2 0.3 0.4 1.3 0.3

157.7 157.7 0.2 0.3 0.4 1.4 0.4

156.4 156.4 0.2 0.3 0.4 1.4 0.3

152.9B 152.9 0.2 0.3 0.4 1.4 0.3

152.9CT 152.9 0.2 0.3 0.4 1.4 0.3

152.9D 152.9 0.2 0.3 0.5 1.5 0.5

150 150.0 0.2 0.3 0.4 1.4 0.3

147.3 147.3 0.2 0.3 0.4 1.4 0.3

144.3 144.3 0.2 0.3 0.4 1.4 0.3

142.4 142.4 0.0 0.2 0.3 5.6 0.2

140.3 140.3 0.2 0.2 0.3 1.3 0.3

136.6 136.6 0.2 0.3 0.5 1.5 0.4

133.6 133.6 0.2 0.2 0.3 1.4 0.3

132 132.0 0.2 0.3 0.4 1.4 0.3
MRG&P Report No. 7 208

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

127.5 127.5 0.2 0.2 0.3 1.3 0.3

125.7 125.7 0.2 0.2 0.3 1.4 0.2

123.0B 123 0.2 0.3 0.4 1.4 0.3

123.0CT 123 0.1 0.2 0.3 1.8 0.2

123.0D 123 0.0 0.0 0.0 2.9 0.0

123.0E 123 0.0 0.0 0.1 3.5 0.1

116.7 116.7 0.2 0.2 0.3 1.4 0.3

114.1 114.1 0.2 0.2 0.3 1.3 0.3

110 110.0 0.2 0.3 0.4 1.4 0.3

107.5 107.5 0.2 0.2 0.3 1.4 0.3

104.5 104.5 0.2 0.2 0.3 1.4 0.2

103 103.0 0.2 0.3 0.4 1.4 0.3

96.4 96.4 0.2 0.3 0.4 1.3 0.3

91.5 91.5 0.0 0.2 0.3 12.4 0.2

89.9B 89.9 0.4 0.5 0.7 1.3 0.6

89.9C 89.9 0.2 0.3 0.4 1.4 0.3

89.9DT 89.9 0.2 0.2 0.3 1.4 0.3

89.9E 89.9 0.0 0.2 0.3 4.6 0.2

86 86 0.0 0.1 0.3 4.0 0.2

82.7 82.7 0.2 0.3 0.4 1.4 0.3

81.5 81.5 0.2 0.3 0.4 1.4 0.3

78 78 0.1 0.2 0.3 1.4 0.2

75.2 75.2 0.2 0.2 0.3 1.3 0.2

73.1 73.1 0.2 0.3 0.4 1.4 0.3

65.8 65.8 0.2 0.2 0.3 1.3 0.2

63 63.0 0.2 0.2 0.3 1.4 0.3

59 59.0 0.2 0.2 0.3 1.4 0.3

57.0E 57.0 0.0 0.0 0.1 3.6 0.1

57.0DT 57.0 0.2 0.3 0.4 1.4 0.3

57.0A 57.0 0.0 0.1 0.3 7.4 0.2

57.0B 57.0 0.0 0.0 0.2 6.4 0.1

55.4 55.4 0.3 0.4 0.5 1.4 0.4

52.8 52.8 0.2 0.2 0.3 1.3 0.2

51.2 51.2 0.1 0.2 0.2 1.7 0.2

47.3 47.3 0.2 0.3 0.4 1.4 0.4

44.8 44.8 0.2 0.3 0.4 1.4 0.3

42.8 42.8 0.0 0.1 0.3 9.6 0.1

40 40.0 0.2 0.3 0.4 1.4 0.3
MRG&P Report No. 7 209

Sample Name 

River Mile 

above Head of 

Passes D16 (mm) D50 (mm) D84 (mm) 

Sorting 

Coefficient 

Mean 

Diameter 

(mm) 

37 37.0 0.2 0.3 0.4 1.4 0.3

35.2 35.2 0.2 0.2 0.3 1.3 0.2

33.0E 33.0 0.0 0.1 0.1 3.2 0.1

33.0C 33.0 0.1 0.2 0.3 1.5 0.2

33.0D 33.0 0.0 0.1 0.2 3.8 0.1

33.0BT 33.0 0.0 0.0 0.0 2.8 0.0

33.0A 33.0 0.2 0.2 0.3 1.4 0.2

30.4 30.4 0.2 0.2 0.3 1.3 0.2

26 26.0 0.2 0.2 0.3 1.3 0.3

23.9 23.9 0.1 0.2 0.2 1.3 0.2

21.9 21.9 0.2 0.2 0.3 1.4 0.2

18 18.0 0.0 0.0 0.1 6.7 0.1

13.5 13.5 0.0 0.0 0.1 6.1 0.1

11.9 11.9 0.0 0.1 0.2 10.0 0.1

5.5 5.5 0.0 0.0 0.0 2.5 0.0

2.8A 2.8 0.0 0.1 0.3 6.6 0.2

2.8B 2.8 0.0 0.0 0.1 4.5 0.1

2.8CT 2.8 0.0 0.0 0.1 3.6 0.1

2.8E 2.8 0.0 0.1 0.2 8.9 0.1

2.8D 2.8 0.1 0.2 0.2 1.3 0.2
REPORT DOCUMENTATION PAGE Form Approved

OMB No. 0704-0188

The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data 

sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other 

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provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.

1. REPORT DATE 

April 2016

2. REPORT TYPE

Other

3. DATES COVERED (From - To)

4. TITLE AND SUBTITLE

Particle Size Distributions of Bed Sediments Along the Mississippi River, Grafton,

Illinois, to Head of Passes, Louisiana, November 2013

5a. CONTRACT NUMBER

5b. GRANT NUMBER

5c. PROGRAM ELEMENT NUMBER

6. AUTHOR(S)

Roger A. Gaines and Anthony M. Priestas

5d. PROJECT NUMBER

5e. TASK NUMBER

5f. WORK UNIT NUMBER

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)

U.S. Army Engineer Research and Development Center

Coastal & Hydraulics Laboratory

3909 Halls Ferry Road, Vicksburg, MS 39180;

USACE Memphis District

167 North Main Street, Memphis, TN 38103

8. PERFORMING ORGANIZATION 

REPORT NUMBER

MRG&P Report No. 7

9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)

USACE Mississippi Valley Division LCA S&T Office

1400 Walnut Street

Vicksburg, MS 39180

10. SPONSOR/MONITOR'S ACRONYM(S)

11. SPONSOR/MONITOR'S REPORT 

NUMBER(S)

12. DISTRIBUTION/AVAILABILITY STATEMENT

Approved for public release; distribution is unlimited.

13. SUPPLEMENTARY NOTES

14. ABSTRACT

Changes in Mississippi River bed material gradations between Cairo, IL, and Head of Passes, LA, have been previously determined in 

1932 and 1989. In November 2013, bed material samples were collected from the thalweg and across the channel width along a reach 

extending from Grafton, IL, to Head of Passes, LA. In all, 754 samples were collected at 496 locations, and results were compared to the 

earlier sampling programs. Results show that since 1932 the Lower Mississippi River bed sediments have become more uniform, the 

reach-averaged median grain diameter has reduced by approximately 50%, and the river has relatively fined upstream and coarsened 

downstream with little change since 1989. 

15. SUBJECT TERMS 

Bed Material, Geomorphology, Laser diffraction, Meander cutoff, Mississippi River, Particle size analysis, River engineering, Sediments, 

Sieve analysis

16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF 

ABSTRACT

SAR

18. NUMBER OF 

PAGES

223

19a. NAME OF RESPONSIBLE PERSON

a. REPORT Roger A. Gaines

Unclassified

b. ABSTRACT

Unclassified

c. THIS PAGE

Unclassified 19b. TELEPHONE NUMBER (Include area code)

(901) 544-3392