Arrowwood_Coulee_Levee_-_Geotechnical_Report_0004.pdf

REPORT C OVER PAGE

Geotechnical Exploration Report

Levee Exploration

Stutsman County, North Dakota

August 18, 2020

Terracon Project No. M1205004

Prepared for:

W. W. Wheeler & Associates, Inc.

Englewood, CO

Prepared by:

Terracon Consultants, Inc.

West Fargo, ND

Terracon Consultants, Inc. 860 9 th Street NE, Unit K West Fargo, ND 58078

P (701) 282 9633 F (701) 282 9635 terracon.com

REPORT C OVER LETTER TO SIGN

W. W. Wheeler & Associates, Inc.

3700 S. Inca Street

Englewood, CO 80110

Attn: Mr. Todd Street

P: (303) 761 4130

E: todd.street@wwwheeler.com

Re: Geotechnical Exploration Report

Levee Exploration

Arrowwood National Wildlife Refuge

Stutsman County, North Dakota

Terracon Project No. M1205004

Dear Mr. Street:

We have completed the Geotechnical Exploration services for the above referenced project. This study was performed in general accordance with Terracon Proposal No. PM1205004 dated

February 3, 2020. This report presents the findings of the subsurface exploration for the proposed project.

We appreciate the opportunity to be of service to you on this project. If you have any questions concerning this report or if we may be of further service, please contact us.

Sincerely, Terracon Consultants, Inc.

Alex L. Sprunk, P.E. Chad A. Cowley, P.E.

Geotechnical Group Manager Senior Engineer

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REPORT TOPICS

INTRODUCTION

SITE CONDITIONS

PROJECT DESCRIPTION

GEOTECHNICAL CHARACTERIZATION

GENERAL COMMENTS

FIGURES

Note: This report was originally delivered in a web-based format. Orange Bold text in the report indicates a referenced section heading. The PDF version also includes hyperlinks which direct the reader to that section and clicking on the

GeoReport logo will bring you back to this page. For more interactive features, please view your project online at client.terracon.com.

ATTACHMENTS

EXPLORATION AND TESTING PROCEDURES

SITE LOCATION AND EXPLORATION PLANS

EXPLORATION RESULTS

SUPPORTING INFORMATION

Note: Refer to each individual Attachment for a listing of contents.

http://client.terracon.com/

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INTRODUCTION

Geotechnical Exploration Report

Levee Exploration

Arrowwood National Wildlife Refuge

Stutsman County, North Dakota Terracon Project No. M1205004

INTRODUCTION

This report presents the results of our subsurface exploration and geotechnical exploration services performed for the proposed levee repair project at Arrowwood National Wildlife Refuge in Stutsman County, North Dakota. The purpose of these services is to provide information relative to:

■ Subsurface soil conditions ■ Groundwater conditions

The original geotechnical exploration Scope of Services for this project included the advancement of three test borings to depths of 35 feet below existing site grades. While on the site, W. W.

Wheeler revised the fieldwork scope to include two borings to a depth of 35 feet below existing grade along the existing levee and two shallower borings (6 feet and 10 feet in depth) in potential borrow areas for the repair project.

Maps showing the site and boring locations are shown in the Site Location and Exploration

Plan sections, respectively. The results of the laboratory testing performed on soil samples obtained from the site during the field exploration are included on the boring logs and/or as separate graphs in the Exploration Results section.

SITE CONDITIONS

The following description of site conditions is derived from our site visit in association with the field exploration and our review of publicly available geologic and topographic maps.

Item Description

Parcel Information

The project is located at Arrowwood National Wildlife Refuge in Stutsman

County, North Dakota.

Latitude: 47.2959° N, Longitude: 98.8431° W (approximate)

See Site Location

Existing

Improvements

Existing wildlife refuge

There is an existing levee on the west side of Arrowwood Lake that is breached. Specific details regarding the levee (height, width, etc.) were not provided.

Levee Exploration ■ Stutsman County, North Dakota

August 18, 2020 ■ Terracon Project No. M1205004

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Item Description

Current Ground Cover Moderately to heavily vegetated with some surface boulders and aggregate-surfaced roadways

PROJECT DESCRIPTION

The levee on the west side of Arrowwood Lake is breached and is prohibiting the local refuge management from vehicle travel through the area. W. W. Wheeler has requested us to provide geotechnical exploration services along the levee (each side of the breach) and in potential borrow areas and provide a description of the subsurface soils encountered. W. W. Wheeler also requested Terracon provide laboratory testing on select samples.

GEOTECHNICAL CHARACTERIZATION

We have developed a general characterization of the subsurface conditions based upon our review of the subsurface exploration, laboratory data, geologic setting and our understanding of the project. This characterization is termed GeoModel. Conditions encountered at each exploration point are indicated on the individual logs. The individual logs can be found in the

Exploration Results section and the GeoModel can be found in the Figures section of this report.

As part of our analyses, we identified the following model layers within the subsurface profile. For a more detailed view of the model layer depths at each boring location, refer to the GeoModel.

Model Layer Layer Name General Description

Fill Variable layers of sandy lean clays and sands with variable contents of silt, clay, and gravel and occasional cobbles

Clay 1 Sandy lean clay – light grayish brown, trace gravel, soft to medium stiff (only encountered in boring B-3)

3 Sand

Sands with variable contents of silt, clay, and gravel – fine to coarse grained, very loose to dense, waterbearing, grayish brown to gray, occasional cobbles

4 Gravel

Poorly graded gravel with sand – fine to coarse grained, grayish brown, medium dense, waterbearing, occasional cobbles (only encountered in boring B-1)

5 Cobbles Cobble layer (only encountered in boring B-1)

6 Clay 2 Sandy lean clay or lean clay with sand – brownish gray to gray, trace gravel, stiff to hard, occasional cobbles

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Due to the variability of soils encountered in the upper extent of some of the soil borings, it was difficult to identify the true transition between fill and native soils. It is possible some of the soils we identified in the boring logs as “fill” are instead disturbed native soils.

Groundwater

The boreholes were observed while drilling for the presence and level of groundwater. The water levels observed in the boreholes can be found on the boring logs in Exploration Results and are summarized below.

Boring Number Approximate Depth to Groundwater while Drilling (feet)

B-1 7

B-2 7

B-3 6.5

1. Below ground surface.

Groundwater was not observed in the remaining boring while drilling, or for the short duration the boring could remain open. However, this does not necessarily mean the boring terminated above groundwater, or the water levels summarized above are stable groundwater levels. Since strata of granular soils were encountered in borings B-1 through B-3, we estimate the water levels observed in the boreholes while drilling were near the stable groundwater level at the site at the time of our fieldwork. Due to the elevated location and shallow termination depth of boring B-4, we estimate groundwater was located below the termination depth.

Groundwater level fluctuations occur due to seasonal variations in the amount of rainfall, runoff and other factors not evident at the time the borings were performed. Therefore, groundwater levels during construction may be higher or lower than the levels indicated on the boring logs.

The possibility of groundwater level fluctuations should be considered when developing the design and construction plans for the project.

GENERAL COMMENTS

Natural variations will occur between exploration point locations or due to the modifying effects of construction or weather. The nature and extent of such variations may not become evident until during or after construction. If variations appear, we can provide further evaluation.

Our Scope of Services does not include either specifically or by implication any environmental or biological (e.g., mold, fungi, bacteria) assessment of the site or identification or prevention of pollutants, hazardous materials or conditions. If the owner is concerned about the potential for such contamination or pollution, other studies should be undertaken.

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Our services and any correspondence or collaboration through this system are intended for the sole benefit and exclusive use of our client for specific application to the project discussed and are accomplished in accordance with generally accepted geotechnical practices with no third-party beneficiaries intended. Any third-party access to services or correspondence is solely for information purposes to support the services provided by Terracon to our client. Reliance upon the services and any work product is limited to our client, and is not intended for third parties. Any use or reliance of the provided information by third parties is done solely at their own risk. No warranties, either express or implied, are intended or made.

Site characteristics as provided are for design purposes and not to estimate excavation cost. Any use of our report in that regard is done at the sole risk of the excavating cost estimator as there may be variations on the site that are not apparent in the data that could significantly impact excavation cost. Any parties charged with estimating excavation costs should seek their own site characterization for specific purposes to obtain the specific level of detail necessary for costing.

Site safety, and cost estimating including, excavation support, and dewatering requirements/design are the responsibility of others.

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FIGURES

Contents:

GeoModel

Note: All attachments are one page unless noted above.

1,410

1,415

1,420

1,425

1,430

1,435

1,440

1,445

1,450

1,455

1,460

1,465

E L

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N

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S L

(f ee t)

Levee Exploration Kensal, ND Terracon Project No. M1205004

NOTES:

Layering shown on this figure has been developed by the geotechnical engineer for purposes of modeling the subsurface conditions as required for the subsequent geotechnical engineering for this project.

B-1 B-2 B-3

B-4

GEOMODEL

This is not a cross section. This is intended to display the Geotechnical Model only. See individual logs for more detailed conditions.

LEGEND

Groundwater levels are temporal. The levels shown are representative of the date and time of our exploration. Significant changes are possible over time.

Water levels shown are as measured during and/or after drilling. In some cases, boring advancement methods mask the presence/absence of groundwater. See individual logs for details.

First Water Observation

Sands with variable contents of silt, clay, and gravel - fine to coarse grained, very loose to dense, waterbearing, grayish brown to gray, occasional cobbles

Poorly graded gravel with sand - fine to coarse grained, grayish brown, medium dense, waterbearing, occasional cobbles (only encountered in boring B-1)

Cobble layer (only encountered in boring B-1)5

Fill Poorly-graded Sand with Silt

Poorly-graded Gravel with Sand

Poorly-graded Sand with Silt and Gravel

Boulders and Cobbles Sandy Lean Clay

Silty Sand Silty Sand with Gravel

Lean Clay with Sand Clayey Sand

Poorly-graded Sand with Gravel

Model Layer General DescriptionLayer Name Variable: layers of sandy lean clays and layers of sands with variable contents of silt, clay, and gravel, and occasional cobbles

Sandy lean clay - light grayish brown, trace gravel, soft to medium stiff (only encountered in B-3)2

Sandy lean clay or lean clay with sand - brownish gray to gray, trace gravel, stiff to hard, occasional cobbles6

Sand

Gravel

Cobbles

Fill

Clay 1

Clay 2

8.5

6.5

6.5

0.5

ATTACHMENTS

Responsive ■ Resourceful ■ Reliable EXPLORATION AND TESTING PROCEDURES 1 of 2

EXPLORATION AND TESTING PROCEDURES

Field Exploration

Number of Borings Boring Depth (feet) Location

2 36 Each side of levee breach

1 10 Potential borrow area southwest of levee

1 6 Potential borrow area along roadway north of the levee

Boring Layout and Elevations: Unless otherwise noted, Terracon personnel provided the boring layout with guidance from W. W. Wheeler personnel. Coordinates were obtained with a handheld

GPS unit (estimated horizontal accuracy of about ±10 feet) (See Exploration Plan). Approximate elevations were provided by W. W. Wheeler. If elevations and a more precise boring layout are desired, we recommend borings be surveyed following completion of fieldwork.

Subsurface Exploration Procedures: We advanced the borings with an ATV-mounted rotary drill rig using 3¼-inch hollow stem auger. Seven samples were obtained in the upper 15 feet of borings and at intervals of 5 feet thereafter using the split-barrel sampling procedure. In the split-barrel sampling procedure, a standard 2-inch outer diameter split-barrel sampling spoon was driven into the ground by a 140-pound automatic hammer falling a distance of 30 inches. The number of blows required to advance the sampling spoon the last 12 inches of a normal 18-inch penetration is recorded as the Standard Penetration Test (SPT) resistance value. The SPT resistance values, also referred to as N-values, are indicated on the boring logs at the test depths. In addition to the split-barrel samples, we collected a bulk soil sample (auger cuttings from ground surface to 5 feet below existing grade) from boring B-4 for testing purposes. We observed and recorded groundwater levels during drilling and sampling. For safety purposes, all borings were backfilled with a mix of auger cuttings and bentonite chips after their completion.

The sampling depths, penetration distances, and other sampling information was recorded on the field boring logs. The samples were placed in appropriate containers and taken to our soil laboratory for testing and classification by a Geotechnical Engineer. Our exploration team prepared field boring logs as part of the drilling operations. These field logs included visual classifications of the materials encountered during drilling and our interpretation of the subsurface conditions between samples. Final boring logs were prepared from the field logs. The final boring logs represent the

Geotechnical Engineer's interpretation of the field logs and include modifications based on observations and tests of the samples in our laboratory.

Responsive ■ Resourceful ■ Reliable EXPLORATION AND TESTING PROCEDURES 2 of 2

Laboratory Testing

The project engineer reviewed the field data and assigned laboratory tests to understand the engineering properties of the various soil strata, as necessary, for this project. Procedural standards noted below are for reference to methodology in general. In some cases, variations to methods were applied because of local practice or professional judgment. Standards noted below include reference to other, related standards. Such references are not necessarily applicable to describe the specific test performed.

■ ASTM D2216 Standard Test Methods for Laboratory Determination of Water (Moisture)

Content of Soil and Rock by Mass

■ ASTM D7263 Standard Test Methods for Laboratory Determination of Density (Unit

Weight) of Soil Specimens

■ ASTM D4318 Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of

Soils

■ ASTM D1140 Standard Test Methods for Determining the Amount of Material Finer than

No. 200 Sieve in Soils by Washing

■ ASTM D6913 Standard Test Method for Particle-Size Analysis of Soils

■ ASTM D698 Standard Test Methods for Laboratory Compaction Characteristics of Soil

Using Standard Effort

The laboratory testing program included examination of soil samples by an engineer. Based on the material’s texture and plasticity, we described and classified the soil samples in accordance with the Unified Soil Classification System.

SITE LOCATION AND EXPLORATION PLANS

Site Location

Exploration Plan

SITE LOCATION

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SITE LOC ATION

DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES MAP PROVIDED BY MICROSOFT BING MAPS

EXPLORATION PLAN

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EXPLOR ATION PLAN

DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES MAP PROVIDED BY MICROSOFT BING MAPS

EXPLORATION RESULTS

Boring Logs (B-1 through B-4)

Atterberg Limits

Grain Size Distribution (3 pages)

Moisture Density Relationship

4-5-5 N=10

1-2-2 N=4

1-2-3 N=5

3-7-8 N=15

3-3-4 N=7

2-5-5 N=10

4-20-8 N=28

4-5-7 N=12

5-28-20 N=48

4-8-12 N=20

7-9-13 N=22

19.6

25.9

9.8

21.0

10.0

13.4

18.4

23.4

18.9

17.8

109 40-19-21

FILL - SANDY LEAN CLAY MIXTURE , trace gravel, grayish brown and gray

FILL - BURIED TOPSOIL - CLAYEY SAND , fine grained, dark gray to black FILL - CLAYEY SAND , fine grained, light gray FILL - SANDY LEAN CLAY , trace gravel, light gray and dark gray

FILL - SILTY SAND WITH GRAVEL , fine to coarse grained, grayish brown, waterbearing, contains occasional cobbles

POORLY GRADED SAND WITH SILT (SP-SM), trace gravel, medium to coarse grained, grayish brown, loose, waterbearing, contains occasional cobbles

POORLY GRADED GRAVEL WITH SAND (GP), fine to coarse grained, grayish brown, medium dense, waterbearing, contains occasional cobbles

POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM),

medium to coarse grained, grayish brown, medium dense, waterbearing, contains occasional cobbles

COBBLES

SANDY LEAN CLAY (CL), trace gravel, brownish gray to gray, stiff, contains occasional cobbles

SILTY SAND (SM), trace gravel, medium to fine grained, gray, dense, waterbearing

SANDY LEAN CLAY (CL), trace gravel, gray, very stiff, contains occasional cobbles

Boring Terminated at 36 Feet

2.0 2.5

3.5

6.5

9.0

12.0

14.0

17.0

19.0

25.0

27.0

36.0

1446.5

1439.5

1436.5

1434.5

1431.5

1429.5

1423.5

1421.5

1412.5

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

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ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 47.2962° Longitude: -98.8433°

G R

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DEPTH ELEVATION (Ft.)

Surface Elev.: 1448.63 (Ft.)

Advancement Method:

3¼" I.D. Hollow Stem Auger

Abandonment Method:

Boring backfilled with soil cuttings upon completion.

Notes:

Project No.: M1205004

Drill Rig: CME 750X

BORING LOG NO. B-1

W W Wheeler & Associates IncCLIENT:

Englewood, CO

Driller: CN

Boring Completed: 07-15-2020

PROJECT: Levee Exploration

Elevations were provided by others.

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Arrowwood National Wildlife Refuge Kensal, ND

SITE:

Boring Started: 07-15-2020

860 9th St. NE, Unit K West Fargo, ND

While drilling

WATER LEVEL OBSERVATIONS

S A

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T

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4.5': N-value influenced by cobble

3-5-7 N=12

3-2-3 N=5

7-13-14 N=27

3-4-4 N=8

3-3-8 N=11

2-1-1 N=2

1-7-9 N=16

1-4-6 N=10

5-10-12 N=22

3-7-11 N=18

11-14-22 N=36

4-10-14 N=24

27.0

6.6

14.8

16.5

16.8

23.0

21.2

20.7

20.4

17.9

FILL - SANDY LEAN CLAY MIXTURE , trace gravel, grayish brown and gray

FILL - BURIED TOPSOIL - CLAYEY SAND , fine grained, black

FILL - SILTY SAND WITH GRAVEL , coarse to fine grained, grayish brown, contains occasional cobbles

FILL - SANDY LEAN CLAY MIXTURE , trace gravel, grayish brown, contains occasional cobbles FILL - POORLY GRADED SAND , trace gravel, medium to coarse grained, grayish brown, waterbearing, contains occasional cobbles FILL - CLAYEY SAND , trace gravel, medium to fine grained, gray, waterbearing, contains occasional cobbles

POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM),

medium to fine grained, gray, medium dense, waterbearing, contains occasional cobbles SILTY SAND WITH GRAVEL (SM), medium to fine grained, gray, very loose to medium dense, waterbearing, contains occasional cobbles cobble layer noted @ 17' while drilling

LEAN CLAY WITH SAND (CL), trace gravel, gray, stiff, contains occasional cobbles

SANDY LEAN CLAY (CL), trace gravel, gray, very stiff to hard, contains occasional cobbles cobble layer @ 29.5' yielded no sample recovery

Boring Terminated at 36 Feet

2.5

3.5

6.0

7.0 7.5

8.5

12.0

18.0

23.0

36.0

1442.5

1441.5

1436.5

1430.5

1425.5

1412.5

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

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Surface Elev.: 1448.59 (Ft.)

Advancement Method:

3¼" I.D. Hollow Stem Auger

Abandonment Method:

Boring backfilled with soil cuttings upon completion.

Notes:

Project No.: M1205004

Drill Rig: CME 750X

BORING LOG NO. B-2

W W Wheeler & Associates IncCLIENT:

Englewood, CO

Driller: CN

Boring Completed: 07-15-2020

PROJECT: Levee Exploration

Elevations were provided by others.

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Arrowwood National Wildlife Refuge Kensal, ND

SITE:

Boring Started: 07-15-2020

860 9th St. NE, Unit K West Fargo, ND

While drilling

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ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 47.2959° Longitude: -98.843°

G R

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DEPTH ELEVATION (Ft.)

WATER LEVEL OBSERVATIONS

S A

M P

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T

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5-3-3 N=6

1-1-1 N=2

0-2-5 N=7

0-2-2 N=4

50/6"

29.9

31.6

22.9

17.8

39-21-18

FILL - SANDY LEAN CLAY MIXTURE , trace gravel, dark brown

SANDY LEAN CLAY (CL), trace gravel, light grayish brown, soft to medium stiff

CLAYEY SAND (SC), trace gravel, medium to fine grained, grayish brown, loose, waterbearing

POORLY GRADED SAND WITH GRAVEL (SP), medium to coarse grained, grayish brown, waterbearing, contains occasional cobbles Sampler Refusal at 10 Feet

2.0

6.5

9.0

10.0

1441.5

10': Sampler refusal on cobble at 10'

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

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ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 47.2958° Longitude: -98.8435°

G R

A P

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L O

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M O

D E

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LA

Y E

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DEPTH ELEVATION (Ft.)

Surface Elev.: 1448.10 (Ft.)

Advancement Method:

3¼" I.D. Hollow Stem Auger

Abandonment Method:

Boring backfilled with soil cuttings upon completion.

Notes:

Project No.: M1205004

Drill Rig: CME 750X

BORING LOG NO. B-3

W W Wheeler & Associates IncCLIENT:

Englewood, CO

Driller: CN

Boring Completed: 07-15-2020

PROJECT: Levee Exploration

Elevations were provided by others.

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Arrowwood National Wildlife Refuge Kensal, ND

SITE:

Boring Started: 07-15-2020

860 9th St. NE, Unit K West Fargo, ND

While drilling

WATER LEVEL OBSERVATIONS

S A

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T

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5-9-8 N=17

3-5-6 N=11

2-4-6 N=10

20.0

20.9

FILL - POORLY GRADED GRAVEL WITH SILT AND SAND ,

grayish brown SANDY LEAN CLAY (CL), trace gravel, grayish brown, very stiff to stiff

Boring Terminated at 6 Feet

0.5

6.0

1457.5

Hammer Type: AutomaticStratification lines are approximate. In-situ, the transition may be gradual.

T H

IS

B

O R

IN

G

L O

G

IS

N O

T V

A

LI

D

IF

S E

P A

R A

T E

D F

R O

M O

R

IG

IN

A

L R

E P

O R

T

G E

O S

M A

R T

L O

G -N

O W

E

LL

M

L

E V

E E

E X

P

LO

R A

T

IO

N .G

P J

T E

R R

A C

O N

_D A

T A

T E

M P

LA

T

E .G

D T

/1

/2

W A

T E

R L

E V

E L

O B

S E

R V

A T

IO

N

S

D E

P T

H

F t.)

F

IE

LD

T

E S

T R

E S

U

LT

S

P E

R C

E N

T F

IN

E

S

W A

T E

R C

O N

T E

N T

D R

Y U

N

IT

W E

IG

H

T pc f)

ATTERBERG

LIMITS

LL-PL-PI

LOCATION See Exploration Plan

Latitude: 47.2971° Longitude: -98.8437°

G R

A P

H

IC

L O

G

M O

D E

L

LA

Y E

R

DEPTH ELEVATION (Ft.)

Surface Elev.: 1463.71 (Ft.)

Advancement Method:

3¼" I.D. Hollow Stem Auger

Abandonment Method:

Boring backfilled with soil cuttings upon completion.

Notes:

Project No.: M1205004

Drill Rig: CME 750X

BORING LOG NO. B-4

W W Wheeler & Associates IncCLIENT:

Englewood, CO

Driller: CN

Boring Completed: 07-15-2020

PROJECT: Levee Exploration

Elevations were provided by others.

See Exploration and Testing Procedures for a description of field and laboratory procedures used and additional data (If any).

See Supporting Information for explanation of symbols and abbreviations.

Arrowwood National Wildlife Refuge Kensal, ND

SITE:

Boring Started: 07-15-2020

860 9th St. NE, Unit K West Fargo, ND

Not measurable before auger removal

WATER LEVEL OBSERVATIONS

S A

M P

LE

T

Y

0 20 40 60 80 100

CH

o r

OH

CL

o r

OL

ML or OL

MH or OH

"U " L ine

"A " L ine

ATTERBERG LIMITS RESULTS

ASTM D4318

P L A S T I C I T Y

I N D E X

LIQUID LIMIT

PROJECT NUMBER: M1205004

SITE: Arrowwood National Wildlife Refuge Kensal, ND

PROJECT: Levee Exploration

CLIENT: W W Wheeler & Associates Inc Englewood, CO

860 9th St. NE, Unit K West Fargo, ND

LA

B

O R

A T

O R

Y T

E S

T S

A R

E N

O T

V A

LI

D

IF

S

E P

A R

A T

E D

F R

O M

O R

IG

IN

A L

R E

P O

R T

A

T E

R B

E R

G L

IM

IT

S M

L E

V E

E E

X P

LO

R

A T

IO

N

.G P

J T

E R

R A

C O

N _D

A T

A T

E M

P

LA

T E

.G D

T

/1

/2

PIPLLLBoring ID Depth

B-1

B-3

Bag 1 49.9

Fines

29.5 - 31

2 - 3.5

0 - 5

CL

CL

SANDY LEAN CLAY

SANDY LEAN CLAY

DescriptionUSCS

CL-ML

0.0010.010.1110100

3/4 1/23/8 30 403 60

HYDROMETERU.S. SIEVE OPENING IN INCHES

16 20

U.S. SIEVE NUMBERS

44 10063 2 10 14 506 2001.5 81 140

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

P E

R C

E N

T C

O A

R S

E R

B Y

W E

IG

H

T

GRAIN SIZE DISTRIBUTION

ASTM D422 / ASTM C136

PROJECT NUMBER: M1205004

SITE: Arrowwood National Wildlife Refuge Kensal, ND

PROJECT: Levee Exploration

CLIENT: W W Wheeler & Associates Inc Englewood, CO

860 9th St. NE, Unit K West Fargo, ND

LA

B

O R

A T

O R

Y T

E S

T S

A R

E N

O T

V A

LI

D

IF

S

E P

A R

A T

E D

F R

O M

O R

IG

IN

A L

R E

P O

R

G R

A

IN

S

IZ

E : U

S C

S

M

L

E V

E E

E X

P

LO

R A

T

IO

N .G

P J

T E

R R

A C

O N

_D A

T A

T E

M P

LA

T

E .G

D T

/2

/2

B-1

B-1

B-2 fine coarse finemedium

COBBLES

GRAVEL SAND

SILT OR CLAY

D30

D60

BORING ID

3/8" #4 #10 #20 #40 #60 #100 #200

100.0 97.59 95.11 91.73 87.58 79.81 67.64 50.1

1" 3/4" 3/8" #4 #10 #20 #40 #60 #100 #200

100.0 93.47 82.98 67.95 50.79 36.13 25.36 17.44 13.39 10.7

100.0 95.29 69.27 51.96 38.12 27.73 21.43 17.76 15.13 12.62

1" 3/4" 3/8" #4 #10 #20 #40 #60 #100 #200

CC

CU

coarse

D10

SANDY LEAN CLAY (CL)

PG SAND W/ SILT & GRAVEL (SP-SM)

SILTY SAND WITH GRAVEL (SM)

2.4

32.1

48.0

47.5

57.2

39.3

26.6

10.7

12.6

0.0

0.0

0.0

23.54.5 - 6

14.5 - 16

4.5 - 6

CL

SP-SM

SM

0.111 3.182 6.553

0.015 0.573 1.025

50.79

1.65

Sieve

REMARKS

SOIL DESCRIPTION

% Finer% Finer SieveSieve% Finer

USCS% CLAY% FINES% SILT% SAND% GRAVEL% COBBLESDEPTH

COEFFICIENTS

GRAIN SIZE

0.0010.010.1110100

3/4 1/23/8 30 403 60

HYDROMETERU.S. SIEVE OPENING IN INCHES

16 20

U.S. SIEVE NUMBERS

44 10063 2 10 14 506 2001.5 81 140

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

P E

R C

E N

T C

O A

R S

E R

B Y

W E

IG

H

T

GRAIN SIZE DISTRIBUTION

ASTM D422 / ASTM C136

PROJECT NUMBER: M1205004

SITE: Arrowwood National Wildlife Refuge Kensal, ND

PROJECT: Levee Exploration

CLIENT: W W Wheeler & Associates Inc Englewood, CO

860 9th St. NE, Unit K West Fargo, ND

LA

B

O R

A T

O R

Y T

E S

T S

A R

E N

O T

V A

LI

D

IF

S

E P

A R

A T

E D

F R

O M

O R

IG

IN

A L

R E

P O

R

A

IN

S

IZ

E : U

S C

S

M

L

E V

E E

E X

P

LO

R A

T

IO

N .G

P J

T E

R R

A C

O N

_D A

T A

T E

M P

LA

T

E .G

D T

/2

/2

B-2

B-2

B-3

GRAVEL SAND

SILT OR CLAY

D30

D60

BORING ID

3/4" 3/8" #4 #10 #20 #40 #60 #100 #200

94.69 82.1 68.37 53.51 41.68 33.38 21.9 14.54 10.61

3/4" 3/8" #4 #10 #20 #40 #60 #100 #200

100.0 95.26 80.01 67.52 57.32 45.14 31.48 22.02 15.92

100.0 98.77 98.12 97.27 96.03 94.52 91.24 83.22 63.47

1/2" 3/8" #4 #10 #20 #40 #60 #100 #200

PG SAND W/ SILT & GRAVEL (SP-SM)

SILTY SAND WITH GRAVEL (SM)

26.3

20.0

1.9

57.8

64.1

34.6

5.5

37.1

15.90.0

0.0

5.1

26.4

9.5 - 11

12 - 13.5

4.5 - 6

SP-SM

SM

CL

2.918 1.064 0.068

0.364 0.231 0.008

0.069

42.04

0.65

Sieve

REMARKS

SOIL DESCRIPTION

% Finer% Finer SieveSieve% Finer

USCS% CLAY% FINES% SILT% SAND% GRAVEL% COBBLESDEPTH

0.0010.010.1110100

3/4 1/23/8 30 403 60

HYDROMETERU.S. SIEVE OPENING IN INCHES

16 20

U.S. SIEVE NUMBERS

44 10063 2 10 14 506 2001.5 81 140

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

P E

R C

E N

T C

O A

R S

E R

B Y

W E

IG

H

T

GRAIN SIZE DISTRIBUTION

ASTM D422 / ASTM C136

PROJECT NUMBER: M1205004

SITE: Arrowwood National Wildlife Refuge Kensal, ND

PROJECT: Levee Exploration

CLIENT: W W Wheeler & Associates Inc Englewood, CO

860 9th St. NE, Unit K West Fargo, ND

LA

B

O R

A T

O R

Y T

E S

T S

A R

E N

O T

V A

LI

D

IF

S

E P

A R

A T

E D

F R

O M

O R

IG

IN

A L

R E

P O

R

A

IN

S

IZ

E : U

S C

S

M

L

E V

E E

E X

P

LO

R A

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IO

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P J

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/2

/2

Bag 1

GRAVEL SAND

SILT OR CLAY

D30

D60

BORING ID

1/2" 3/8" #4 #10 #20 #40 #60 #100 #200

100.0 93.26 86.09 81.87 75.93 69.12 62.55 56.35 49.94

Bulk sample from B-4

13.9 36.1 21.90.0 28.00 - 5 CL

0.203

0.007

Sieve

REMARKS

SOIL DESCRIPTION

% Finer% Finer SieveSieve% Finer

USCS% CLAY% FINES% SILT% SAND% GRAVEL% COBBLESDEPTH

0 5 10 15 20 25 30 35 40 45

D R

Y D

E N

S

IT

Y pc f

WATER CONTENT, %

ZAV for G s = 2.8

ZAV for G s = 2.7

ZAV for G s = 2.6

MOISTURE-DENSITY RELATIONSHIP

ASTM D698/D1557

PROJECT NUMBER: M1205004

SITE: Arrowwood National Wildlife Refuge Kensal, ND

PROJECT: Levee Exploration

CLIENT: W W Wheeler & Associates Inc Englewood, CO

860 9th St. NE, Unit K West Fargo, ND

LA

B

O R

A T

O R

Y T

E S

T S

A R

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V A

LI

D

IF

S

E P

A R

A T

E D

F R

O M

O R

IG

IN

A L

R E

P O

R

C O

M P

A C

T

IO

N

V

M

L

E V

E E

E X

P

LO

R A

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IO

N .G

P J

T E

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A C

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_D A

T A

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LA

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D T

/2

/2

Bulk sample from B-4

ASTM D698 Method A

Bag 1 @ 0 - 5 feetSource of Material

Description of Material

Remarks:

Test Method

PCF

TEST RESULTS

SANDY LEAN CLAY

Maximum Dry Density

LL

112.0

49.9 Optimum Water Content

PIPL

17 27

ATTERBERG LIMITS

16.1

Percent Fines

SUPPORTING INFORMATION

General Notes

Unified Soil Classification System

500 to 1,000

> 8,000

4,000 to 8,000

2,000 to 4,000

1,000 to 2,000 less than 500

Unconfined Compressive Strength Qu, (psf)

Auger Cuttings

Shelby Tube

Standard Penetration Test

Trace

PLASTICITY DESCRIPTION

Water levels indicated on the soil boring logs are the levels measured in the borehole at the times indicated. Groundwater level variations will occur over time. In low permeability soils, accurate determination of groundwater levels is not possible with short term water level observations.

DESCRIPTION OF SYMBOLS AND ABBREVIATIONS

GENERAL NOTES

> 30

11 - 30

1 - 10Low

Non-plastic

Plasticity Index

#4 to #200 sieve (4.75mm to 0.075mm

Boulders

12 in. to 3 in. (300mm to 75mm)Cobbles

3 in. to #4 sieve (75mm to 4.75 mm)Gravel

Sand

Passing #200 sieve (0.075mm)Silt or Clay

Particle Size

Water Level After a Specified Period of Time

Water Level After a Specified Period of Time

Water Initially Encountered

Soil classification is based on the Unified Soil Classification System. Coarse Grained Soils have more than 50% of their dry weight retained on a #200 sieve; their principal descriptors are: boulders, cobbles, gravel or sand. Fine Grained Soils have less than 50% of their dry weight retained on a #200 sieve; they are principally described as clays if they are plastic, and silts if they are slightly plastic or non-plastic. Major constituents may be added as modifiers and minor constituents may be added according to the relative proportions based on grain size. In addition to gradation, coarse-grained soils are defined on the basis of their in-place relative density and fine-grained soils on the basis of their consistency.

GRAIN SIZE TERMINOLOGY

RELATIVE PROPORTIONS OF FINESRELATIVE PROPORTIONS OF SAND AND GRAVEL

DESCRIPTIVE SOIL CLASSIFICATION

LOCATION AND ELEVATION NOTES

SAMPLING WATER LEVEL FIELD TESTS

N

(HP)

(T)

(DCP)

UC

(PID)

(OVA)

Standard Penetration Test Resistance (Blows/Ft.)

Hand Penetrometer

Torvane

Dynamic Cone Penetrometer

Unconfined Compressive Strength

Photo-Ionization Detector

Organic Vapor Analyzer

Medium

0Over 12 in. (300 mm)

>12

5-12

<5

Percent of Dry Weight

TermMajor Component of Sample

Modifier

With

Trace

Descriptive Term(s) of other constituents

>30Modifier

<15

Percent of Dry Weight

Descriptive Term(s) of other constituents

With 15-29

High

Unless otherwise noted, Latitude and Longitude are approximately determined using a hand-held GPS device. The accuracy of such devices is variable. Surface elevation data annotated with +/- indicates that no actual topographical survey was conducted to confirm the surface elevation. Instead, the surface elevation was approximately determined from topographic maps of the area.

Standard Penetration or N-Value

Blows/Ft.

Descriptive Term (Density)

CONSISTENCY OF FINE-GRAINED SOILS

Hard

15 - 30Very Stiff> 50Very Dense

8 - 15Stiff30 - 50Dense

4 - 8Medium Stiff10 - 29Medium Dense

2 - 4Soft4 - 9Loose

0 - 1Very Soft0 - 3Very Loose

(50% or more passing the No. 200 sieve.)

Consistency determined by laboratory shear strength testing, field visual-manual procedures or standard penetration resistance

STRENGTH TERMS

> 30

Descriptive Term (Consistency)

Standard Penetration or N-Value

Blows/Ft.

RELATIVE DENSITY OF COARSE-GRAINED SOILS

(More than 50% retained on No. 200 sieve.)

Density determined by Standard Penetration Resistance

UNIFIED SOIL CLASSIFICATION SYSTEM

UNIFIED SOIL C LASSIFIC ATION SYSTEM

Criteria for Assigning Group Symbols and Group Names Using Laboratory Tests A Soil Classification

Group Symbol

Group Name B

Coarse-Grained Soils:

More than 50% retained on No. 200 sieve

Gravels:

More than 50% of coarse fraction retained on No. 4 sieve

Clean Gravels:

Less than 5% fines C

Cu 4 and 1 Cc 3 E GW Well-graded gravel F

Cu 4 and/or [Cc<1 or Cc>3.0] E GP Poorly graded gravel F

Gravels with Fines:

More than 12% fines C

Fines classify as ML or MH GM Silty gravel F, G, H

Fines classify as CL or CH GC Clayey gravel F, G, H

Sands:

50% or more of coarse fraction passes No. 4 sieve

Clean Sands:

Less than 5% fines D

Cu 6 and 1 Cc 3 E SW Well-graded sand I

Cu 6 and/or [Cc<1 or Cc>3.0] E SP Poorly graded sand I

Sands with Fines:

More than 12% fines D

Fines classify as ML or MH SM Silty sand G, H, I

Fines classify as CL or CH SC Clayey sand G, H, I

Fine-Grained Soils:

50% or more passes the No. 200 sieve

Silts and Clays:

Liquid limit less than 50

Inorganic:

PI 7 and plots on or above “A” line J

CL Lean clay K, L, M

PI 4 or plots below “A” line J ML Silt K, L, M

Organic:

Liquid limit - oven dried

0.75 OL

Organic clay K, L, M, N

Liquid limit - not dried Organic silt K, L, M, O

Silts and Clays:

Liquid limit 50 or more

Inorganic:

PI plots on or above “A” line CH Fat clay K, L, M

PI plots below “A” line MH Elastic Silt K, L, M

Organic:

Liquid limit - oven dried

0.75 OH

Organic clay K, L, M, P

Liquid limit - not dried Organic silt K, L, M, Q

Highly organic soils: Primarily organic matter, dark in color, and organic odor PT Peat

A Based on the material passing the 3-inch (75-mm) sieve.

B If field sample contained cobbles or boulders, or both, add “with cobbles or boulders, or both” to group name.

C Gravels with 5 to 12% fines require dual symbols: GW-GM well-graded gravel with silt, GW-GC well-graded gravel with clay, GP-GM poorly graded gravel with silt, GP-GC poorly graded gravel with clay.

D Sands with 5 to 12% fines require dual symbols: SW-SM well-graded sand with silt, SW-SC well-graded sand with clay, SP-SM poorly graded sand with silt, SP-SC poorly graded sand with clay.

E Cu = D60/D10 Cc =

DxD

)(D

F If soil contains 15% sand, add “with sand” to group name.

G If fines classify as CL-ML, use dual symbol GC-GM, or SC-SM.

H If fines are organic, add “with organic fines” to group name.

I If soil contains 15% gravel, add “with gravel” to group name.

J If Atterberg limits plot in shaded area, soil is a CL-ML, silty clay.

K If soil contains 15 to 29% plus No. 200, add “with sand” or “with gravel,” whichever is predominant.

L If soil contains 30% plus No. 200 predominantly sand, add

“sandy” to group name.

M If soil contains 30% plus No. 200, predominantly gravel, add

“gravelly” to group name.

N PI 4 and plots on or above “A” line.

O PI 4 or plots below “A” line.

P PI plots on or above “A” line.

Q PI plots below “A” line.

atterberg limits