04_Geology_Package_Rev_04-21-26_compressed_0005.pdf

PDF 39 MB Posted Jun 3, 2026

Attached to: DK Heart Butte Dam Safety Modification
Solicitation number: 140R6026R0004
Issued by: Department of the Interior Bureau of Reclamation

About this file

Written by GovTribe AI · Jun 3, 2026

This is a geotechnical package supporting the Heart Butte Dam Safety Modification project for the Bureau of Reclamation. The document provides geological and geotechnical investigation data necessary for the final design modifications to Heart Butte Dam, including laboratory testing results, borrow material characterization, and subsurface exploration findings. The package consolidates multiple technical reports and laboratory analyses conducted between 2018 and 2025, including a Geologic Exploration Report from the 2018-2021 Corrective Action Study, conduit sediment investigations, borrow area soil characterization (8550-2025-02), and final design geologic investigations. These technical materials serve as supporting documentation for solicitation 140R6026R0004 and are essential reference materials for contractors bidding on the dam safety modification work.

The geology package is a supporting technical document rather than a standalone requirement specification or work statement. It provides engineering data and subsurface conditions information that contractors will reference during design and construction planning phases. The complete package, including the Revised Geology Package (Rev. 04-21-2026), is available upon request from the Contracting Specialist, Mitchell Frost, at mitchell_frost@ios.doi.gov. This document supports the overall procurement for safety modifications to Heart Butte Dam and should be reviewed in conjunction with the main solicitation documents, amendments 0001-0005, and the associated drawings package (03B_00 00 02_Drawings 11x17).

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File	Type	Posted
Sol_140R6026R0004_Amd_0006.pdf	PDF	Jun 15, 2026
140R6026R0004_-_Amendment_No__0005_0005.pdf	PDF	Jun 3, 2026
Sol_140R6026R0004_Amd_0005.pdf	PDF	Jun 3, 2026
Price_Schedule_B_0005.xlsx	XLSX spreadsheet	Jun 3, 2026
Sol_140R6026R0004_Amd_0004.pdf	PDF	May 20, 2026
140R6026R0004_-_Amendment_No__0004_0004.pdf	PDF	May 20, 2026
140R6026R0004_-_Amendment_No__0003_0003.pdf	PDF	May 11, 2026
Pre-bid_Site_Visit_Presentation_0003.pptx	PPTX presentation	May 11, 2026
Sol_140R6026R0004_Amd_0003.pdf	PDF	May 11, 2026
TM_8550-2025-02_Geotechnical_Laboratory_in_Support_of_Final_Design_Modifications_Heart_Butte_Dam_0002.pdf	PDF	Apr 24, 2026
Sol_140R6026R0004_Amd_0002.pdf	PDF	Apr 24, 2026
Solicitation_140R6026R0004_0002_4_24_26_0002.pdf	PDF	Apr 24, 2026
8550-2024-25_Heart_Butte_FD_Borrow_0002.pdf	PDF	Apr 24, 2026
8530-2018-54_Geotech_Lab_Conduit_Sediment_0002.pdf	PDF	Apr 24, 2026
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Heart_Butte_Dam_2024_Final_Design_Geologic_Investigations_0002.pdf	PDF	Apr 24, 2026
Sol_140R6026R0004_Amd_0001.pdf	PDF	Apr 14, 2026
Solicitation_140R6026R0004_0001_4_14_26_0001.pdf	PDF	Apr 14, 2026
Sol_140R6026R0004.pdf	PDF	Apr 13, 2026
Solicitation_140R6026R0004_4_13_26.pdf	PDF	Apr 13, 2026
03B_00_00_02_Drawings_11x17.pdf	PDF	Apr 13, 2026

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D A T E

A N D

T I M E

P L O T T E D

B Y

5 4

3 2 1

3 2

N o t

P l o t t e d

N o t

P l o t t e d

FIELD IDENTIFICATION PROCEDURES FOR FINE GRAINED SOILS OR FRACTIONS

UNIFIED SOIL CLASSIFICATION

INCLUDING IDENTIFICATION AND DESCRIPTION

Poorly graded sands, gravely sands;

little or no fines

Silty sands, poorly graded sand-silt mixtures

Inorganic silty and very fine sands, rock flour, silty or clayey fine sands with slight plasticity

Peat and other highly organic soils

DRY STRENGTH (Crushing Characteristics)

Inorganic clays of medium to high plasticity soil to the consistency of putty, adding water if necessary. Allow the pot to dry completely by oven, sun, or air drying and then test its strength by breaking and crumbling between the fingers. This strength is a measure of the character and quantity of the colloidal fraction contained in the soil. The dry strength increases with increasing plasticity.

typical inorganic silt possesses only very slight dry strength Silty fine sands and silts have about the same slight dry strength, but can be distinguished by the feel when powdering the dried specimen. Fine sand feels gritty whereas a typical silt has the smooth feel of flour

After removing particles larger than No. 40 sieve size, mold a pot of

High dry strength is characteristic for clays of the CH group A symbols of the Unified soil classification system based on field indent. Copies of Drawing No.

103-D-347, Unified Soil Classification, may be obtained on request office of Director of Design and Construction. Bureau of Reclamation, Denver, Colorado R0225

These procedures are to be performed on the minus No. 40 sieve size particles, in for field classification purposes, screening is not intended, simply remove by hand the coarse particles that interfere with the tests

DILATANCY

(Reaction to skaking)

TOUGHNESS

(Consistency near Plastic Limit)

DRY STRENGTH

(Crushing Characteristics)

(T h e N o s ie ve s iz e i s a b o u t th e s m a ll e s t p a rt ic le v is ib le t o t h e n a k e d e ye

F I N E

G R A I N E D

S O I L S

M o r e t h a n h a l f o f m a t e r i a l i s s m a l l e r t h a n

N o s i e v e s i z e

Medium to high

None to slight

Slight to medium

High to very high

DILATANCY (Reaction to shaking)

Slight to medium

Readily identified by color, odor, spongy feel and frequently by fibrous texture.

After removing particles larger than No 40 sieve sieve, prepare a pat striking

Place the pot in the open palm of one hand and shake horizontally, Very fine clean sands give the quickest and most distinct reaction

ADOPTED BY - CORPS OF ENGINEERS AND BUREAU OF RECLAMATION 1952

vigorously against the other of moist soil with a volume of about one-half cubic inch. Add enough water if necessary to make the soil soft but not sticky.

hand several times. A positive reaction consists of the appearance of water on the surface of the pot which changes to a livery consistency and becomes glossy. When the sample is squeezed between the fingers, the water and gloss disappear from the surface, the pot stiffens, and finally it cracks or crumbles. The rapidity of appearance of water during shaking and of its disappearance during squeezing assist in identifying the character of the times in a soil.

whereas a plastic clay has no reaction inorganic silts, such as a typical rock flour, show a moderately quick reaction.

* Boundary classifications: - Soils processing characteristics of two groups are designated by combinations of group symbols for Example GW-GC, well graded gravel mixture with clay binder

* All sieve sizes on this chart are US standard.

P C M

A S

B U I L T

S I L T S

C L A Y S

L iq u id l im it g re a te r th

HIGHLY ORGANIC SOILS

S I L T S

A Y S

L iq u id l i m i t l e s t h a n

Letter symbols in the logs, are group

Slight to medium

None High

None to very slow

Slow to none

None to very slow

Quick to slow

Slow Slight

Medium

None

Inorganic clays of high plasticity, fat clays

Inorganic clays to low to medium plasticity, gravely clays, sandy clays, silty clays, lean clays

Organic silts and organic silt-clays of low plasticity

Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic silts

(A p p re c ia b le m o u n t f fi e s

(L it tl e o r n o f in e s

(A p p re c ia le m o u t fi n e s

( L it tl e o r n o f in e s

FIELD IDENTIFICATION PROCEDURES

(Excluding particles larger than 3 inches and basing fractions on estimated weights)

IDENTIFICATION PROCEDURES ON FRACTION SMALLER THAN No 40 SIEVE SIZE

C L E A N

S A N D S

C O A R S E

G R A I N E D

S O I L S

M o r e t h a n h a l f o f m a t e r i a l i s la rg e r t h s i e v e s i z e

M o r e t h a n h a l f o f c o a r r a c t i o n i s s m a l l e r t h s i e v e s i z e

(F o r vi s u a l c la s s if ic a ti o n s th e s iz e m a y e d a s e q u iv a le n t to t h e N o s ie ve s iz e

S A N D S

W I T H

F I N E S

G R A V E L S

G R A V E

W I T H

F I N E S

M o r e t h a n h a l f o f c o a r fr c ti o n i s l a rg e r th s i e v e s i z e

C L E

G R A V E L S Wide range in grain size and substantial amounts of all intermediate particle sizes.

Predominantly one size or a range of sizes with some intermediate sizes missing.

Wide range in grain sizes and substantial amounts of all intermediate particle sizes.

Predominantly one size or a range of sizes with some intermediate sizes missing.

Non-plastic fines (for indentification procedures see ML below).

Plastic fines (for identification procedures see CL below).

Non-plastic fines (for identification procedures see ML below).

Plastic fines (for identification procedures see CL below).

Well graded sands, gravely sands;

little or no fines

Clayey sands, poorly graded sand-clay mixtures

Well graded gravel's, gravel-sand mixtures; little or no fines

Poorly graded gravel's, gravel-sand mixtures; little or no fines

Silty gravels, poorly graded gravel-sand-silt mixtures

Clayey gravels, poorly graded gravel-sand-clay mixtures

GROUP

SYMBOLS

TYPICAL NAMES

For classification of fine-grained soils and fine-grained fraction of coarse-grained soils.

"U L I N E

U s e g ra in s iz e c u rv e i d e n ti fy in g t h e f ra c ti o n s a s g iv e n u n d e r fi e ld i d e n ti fi c a ti o n

Highly organic clays have a very weak and spongy feel at the plastic limit

TOUGHNESS (Consistency near plastic limit) After removing particles larger than No. 40 sieve size, a specimen of

After the thread crumbles, the pieces should be lumped together and

The tougher the thread near the plastic limit and the stiffer the

LIQUID LIMIT (LL)

FOR LABORATORY CLASSIFICATION OF FINE GRAINED SOILS

soil about one-half inch cube in size is molded to the consistency of putty.

If too dry, water must be added and if sticky, the specimen should be spread out in a thin layer and allowed to lose some moisture by evaporation. Then the specimen is rolled out by hand on a smooth surface or between the palms into a thread about one-eighth inch in diameter. The thread is then folded and rerolled repeatedly. During this manipulation, the moisture content is gradually reduced and the specimen stiffens, finally loses its plasticity, and crumbles when the plastic limit is reached.

a slight kneading action continued until the lump crumbles.

lump when it finally crumbles, the more potent is the colloidal clay fraction in the soil weakness of the thread at the plastic limit and quick loss of coherence of the lump below the plastic limit indicate either inorganic clay of low plasticity, or materials such as keolin - type clays and organic clays which occur below the A-line.

add information on structure, stratification, consistency in undisturbed and remolded states.

Moisture and drainage conditions

Clayey Silt, brown; slightly plastic.

small percentage of fine sand.

numerous vertical root holes, firm and dry in place, loess, (ML)

EXAMPLE:-

For undisturbed soils degree and character of plasticity, amount and maximum size of coarse grains; color in wet condition, odor in any, local or geologic name, and other pertinent descriptive information; and symbol in parentheses.

Give typical name;

0 10 16 20 504030 60

Horizontal at PI=4 to LL=25.5, then PI=0.73 (LL - 20) then PI=0.9 (LL - 8) Vertical at LL=16 to PI=7, P L A S T I C I

I N D E X P I

ML-CL

Equation of "A"-line

Equation of "U"-line

MLOR OL

O R

C L

O L

M L O R

O H

9080 100

N E

Between one and 3

Greater than 4

LABORATORY CLASSIFICATION CRITERIA

Atterberg limits above "A" line with PI greater than 7

Atterberg limits below "A" line or PI less than 4

Not meeting all gradation requirements for GW

Afterberg limits below "A" line or PI less than 4

Afterberg limits above "A" line with PI greater than 7

Not meeting all gradation requirements for SW

Cv = D 60

D 10 Greater than 6

Cc = (D 30)2 D 10 Dep

Between one and 3

INFORMATION REQUIRED FOR

DESCRIBING SOILS

add information on stratification, degree of compactness, cementation, moisture conditions and drainage characteristics.

Silty Sand, gravely; about 20hard, angular gravel particles

- inch maximum size; rounded and subangular sand grains coarse to fine;

about 15non-plastic fines with low dry strength; well compacted and moist in place; alluvial sand; (SM)

EXAMPLE:-

For undisturbed soils

Give typical name; indicate approximate percentages of sand and gravel; max. size; angularity, surface condition, and hardness of the course grains; local or geologic name and other pertinent descriptive information, and symbol in parentheses

D e te rm in e p e rc e n ta g e s o f g ra v e l a n d s a n d f ro m g ra in iz e c u rv e D e p e n d in g o n p e rc e n ta g e o f fi n

(f c ti o n s m a ll e r th a n N o s ie ve s iz e c o a rs in e d s o il s a re c la s s if ie d a s f o ll o w s

L e s s t h a

G P

S W

S P

M o r e t h a n

G C

S M

S C to

B rd e ri n g c a s e s r e q u ir in e o f d u a l s y m b o ls

=C C

(D30

Dep

Above "A" line with PI between

4 and 7 are borderline cases requiring use of dual symbols.

Above "A" line with PI between 4 and 7 are borderline cases requiring use of dual symbols.

103-D-347

P P

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

PLAN

BILLINGS, MT

203-600-60005

0 80' 160'40'

E P

D'D

G G'

N O

-1 2-

La sa te

Ja co b, A

A D

B O

S A

N D

T D

A N

D S

O N

S H

-H ' A

N D

J -J

O D

D R

C E

D R A W

/M M

/D D

-0

-1 2-

R ev is io n A pp ro ve r La sa te

Ja co b, A La sa te

Ja co b, G2

P P

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SHOWING

PRE-CONSTRUCTION

BORE HOLES

BILLINGS, MT

203-600-60006

0 80' 160'40'

E P

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

M /D

YY2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

E E

P P

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

PLAN DETAILED AREA

BILLINGS, MT

203-600-60007

E P

0 20' 40'10'

N O

-1 2-

La sa te r, J ac ob A

A D

B O

S A

N D

T D

O D

D T

H E

C E

D R A W

M /D

YY2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

W.L.

2022/5/1

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

EXPLANATION

BILLINGS, MT

203-600-60008

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

M /D

YY2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

2022/5/2

W.L.

2022/5/2

W.L.

2022/5/2

W.L.

2022/5/2

W.L.

2022/5/2

W.L.

RESERVOIR

2022/5/2

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION A-A'

BILLINGS, MT

203-600-60009

0 120'60'

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

W.L.

2022/5/2

W.L.

2022/5/2W.L.

2022/5/2 W.L.

2022/5/2

W.L.

2022/5/1

W.L.

2022/5/2

W.L.

2022/5/2

W.L.

RESERVOIR

2022/5/2

W.L.

2022/5/2

W.L.

2022/5/2

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION B-B'

BILLINGS, MT

203-600-60010

0 60'30'

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

M /D

D Y2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

2022/5/2 W.L.

2022/5/2

W.L.

RESERVOIR

2022/5/2

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION C-C'

BILLINGS, MT

203-600-60011

0 20' 40'10'

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

2024/4/19

W.L.

2024/4/19

W.L.

2021-10-1

W.L.

2024/4/19

W.L.

2024/4/28

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION D-D''

BILLINGS, MT

203-600-60012

0 10' 20'

N O

-1 2-

La sa te r, J ac ob A

N D

O N

D -D

' T O

S H

O W

D H

-2 4-

M O

C E

D R A W

M /D

D Y2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

2021-10-1

W.L.

2022/5/2

W.L.

2021-5-12

W.L.

2021-5-12

W.L.

2021-5-12

W.L.

2021-5-12

W.L.

2021-5-12

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

CALL OUT SECTION D-D'

BILLINGS, MT

203-600-60013

0 10'5'

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

M /D

YY2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

G10

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

RESERVOIR

2024/4/19

W.L.

2022/5/2

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/30

W.L.

2024/4/30

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION E-E'

BILLINGS, MT

203-600-60014

0 20' 40'10'

N O

A D

D S

A N

D S

N E.

-1 2-

La sa te r, J ac ob A

A D

D H

-2 4-

N D

D H

-2 4-

M O

C E

D R A W

G11

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/19

W.L.

RESERVOIR

2024/4/19

W.L.

2024/4/19

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Geologist

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION F-F'

BILLINGS, MT

203-600-60015

0 60'30'

N O

-1 2-

La sa te r, J ac ob A

A D

D H

-2 4-

M O

C E

D R A W

M /D

D Y2

-0

-1

R ev is io n A pp ro ve r La sa te r, J ac ob

A La sa te r, J ac ob

G12

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTION THROUGH

CONDUIT

BILLINGS, MT

203-600-60016

0 60'30'

OUTLET WORKS DATA

BOREHOLE MAXIMUM PRESSURE DATE RESERVOIR ELEVATION

DH14-HBC-1 12.8 psi 5/26/2014 2063.96

DH14-HBC-2 12.2 psi 5/25/2014 2063.26

DH14-HBC-3 13.4 psi 5/25/2014 2063.26

DH14-HBC-4 15.4 psi 5/25/2014 2063.26 DH14-HBC-5 16.5 psi 6/10/2014 2063.41

DH14-HBC-6 18.5 psi 6/11/2014 2063.55

DH14-HBC-7 10.8 psi 6/11/2014 2063.55

HBC-18-01 14.0 psi 5/4/2018 2062.29

HBC-18-02 N/A -- --

HBC-18-03 10.0 psi 5/20/2018 2062.39

HBC-18-03A 8.0 psi 6/4/2018 2063.07

HBC-18-03B 10.0 psi 7/25/2018 2063.10

HBC-18-04 5.5 psi 5/18/2018 2062.38

HBC-18-04A 5.0 psi 6/4/2018 5063.07

HBC-18-05 N/A -- --

N O

-1 2-

La sa te r, J ac ob A

M O

C E

D R A W

N O

/M M

/D D

Y R ev is io n A pp ro ve r

G13

RESERVOIR

2024/4/19

W.L.

2024/4/19

W.L.

2024/4/27

W.L.

RESERVOIR

2024/4/19

W.L.

2024/4/27

W.L.

2024/4/30

W.L.

2024/4/28

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Roccoforte, Kim M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

SECTIONS G-G' AND H-H'

BILLINGS, MT

203-600-60017

0 20' 40'10'

G14

P P

DESIGNED

DRAWN

CHECKED

TECH. APPR.

APPROVED

ADMIN APPROVAL -

Lasater, Jacob A

Walsh, Christie S

Joramo, Seth M

Lasater, Jacob A Geologist

Clark, Cody T

Regional Geologist

SHEET

B U

U O

F R

O N

U .S

A R

O F

C A D

A ut oC A D

S T

C A D

A M

0- T1

-M X -0

.D W

S T

S A V

D A

-0 4-

S T

S A V

B Y

C K -S

A N

S O

U R I

B A S

P R O

G R A M

R T

B U

D A M

GEOLOGY

LEFT AND RIGHT

ABUTMENT BORROW

AREAS

BILLINGS, MT

203-600-60018

E P

0 100' 200'

N O

-1 2-

La sa te r, J ac ob A

A D

S T

D A

A D

T A B U

T B O

R R O

W A

A N

D K

A P.

M O

T H

E R

C E

D R A W

N O

-0 4-

T O

C H

A N

G E

D R A W

N U

M B

O N

U T

G15

G16

G17

G18

G19

G20

G21

G22

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G246

7-1336-A (1-86) Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP17-A

SHEET 1 OF 2

FEATURE: Heart Butte Dam Stilling Basin – North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Test Pit S. of Stilling Basin GROUND ELEVATION: 2016.9’ LATITUDE: N 341542.13 degrees LONGITUDE: E 1671055.79 degrees METHOD OF EXPLORATION: Deere 410J Excavator APPROX. DIMENSIONS: 12’ long x 2.5’ to 10’ wide x 10.5’ deep, North LOGGED BY: K. Roccoforte DEPTH TO WATER: 7.0 to 8.0 ft. seep DATE LOGGED: 5/23/2017

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(ML)s (visual)

1.0 ft.

0.0 to 1.0 ft. SILT WITH SAND (ML)s: Approximately 85% nonplastic fines; approximately 10% fine sand;

approximately 5% gravel; maximum size is 2 inch diameter.

IN-PLACE CONDITION: Light brown; dry; soft; low dry strength; roots and grass in top 4 inches. Scattered brick-red baked shale (clinker) fragments at surface.

GEOLOGIC INTERPRETATION: topsoil

(SM)

(visual)

1-60 lb. sack sample of material from

4.0 to 6.0 ft.

(SM)

(lab class.)

1-60 lb. sack sample of material from

7.0 to 8.0 ft.

(SM)

(lab class.)

10.5 ft.

1.0 to 10.5 ft. SILTY SAND (SM): Approximately 80% fine sand; approximately 20% nonplastic fines; maximum size is fine sand.

IN-PLACE CONDITION: Light brown; moist to 7.0 ft. then wet to 8.0 ft. and moist from 8.0 to 10.5 ft.; excavated easily with an excavator; sidewalls caved in once pit was open to

7.0 ft.; weak reaction with HCl.

LAB TEST DATA: 4.0 to 6.0 ft. – 83% sand; 17% fines.

LL=NP, PI=NP, Moisture=17.1%, Laboratory Classification is: (SM).

LAB TEST DATA: 7.0 to 8.0 ft. – 81% sand; 17% fines; 2% gravel. LL=NP, PI=NP, Moisture=31.3%, Laboratory Classification is: (SM).

GEOLOGIC INTERPRETATION: backfill

G247

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE

HOLE NO: TP17-A

SHEET 2 OF 2

FEATURE: Heart Butte Dam Stilling Basin – North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Test Pit S. of Stilling Basin GROUND ELEVATION: 2016.9’ LATITUDE: N 341542.13 degrees LONGITUDE: E 1671055.79 degrees METHOD OF EXPLORATION: Deere 410J Excavator APPROX. DIMENSIONS: 12’ long x 2.5’ to 10’ wide x 10.5’ deep, NS LOGGED BY: K. Roccoforte DEPTH TO WATER: 7.0 to 8.0 ft. seep DATE LOGGED: 5/23/2017

REMARKS: Test pit excavation was performed to observe and record geologic information pertinent to removal of groundwater from the proposed excavation for the stilling basin modification.

Trench was terminated at 10.5 ft. in depth due to sidewall caving of the test pit. Water was seeping from a depth of 7.0 to 8.0 ft. at a rate of approximately 0.5 gallon per minute, flowing east (downstream). Excavated material was stockpiled adjacent to the excavation. Re-compaction was conducted with a bobcat placing the silt and sand material back across the bottom of the trench in lifts of approximately one foot thick. The bobcat bucket was used to compact between lifts, then the bobcat was driven over the filled trench several times. This process of re-compaction continued until the trench was returned to grade.

SURVEY NOTES: Reclamation’s Dakota’s Area Office (DKAO) in Bismarck, North Dakota obtained as-built locations at the conclusion of the subsurface explorations in summer of 2017. Horizontal data was recorded in NAD27 and vertical data was recorded in NAD29 using high end Global Positioning System (GPS). The basis for the elevations was TP13, 5/8 in. x 5 ft.

rebar in the ground above the outlet works head wall (elev. 2030.4), established in April 2013. Basis for the coordinates were based on GPS and level survey of the brass disc at sta. 3+33, off set 117.20 right of dam centerline in April 2013.

G248

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP17-B

SHEET 1 OF 2

FEATURE: Heart Butte Dam Stilling Basin – North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Test Pit SE of Stilling Basin GROUND ELEVATION: 2015.9’ LATITUDE: N 341530.55 degrees LONGITUDE: E 1671110.65 degrees METHOD OF EXPLORATION: Deere 410J Excavator APPROX. DIMENSIONS: 16.3’ long x 5.9’ wide x 10.3’ deep, North LOGGED BY: K. Roccoforte DEPTH TO WATER: 10.0 to 10.2 ft. seep DATE LOGGED: 5/22/2017

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(ML)s (visual)

1.0 ft.

0.0 to 1.0 ft. SILT WITH SAND (ML)s: Approximately 85% nonplastic fines; approximately 15% fine sand; maximum size is fine sand.

IN-PLACE CONDITION: Light brown; dry; soft; low dry strength; low toughness; roots and grass in top 8 inches.

Riprap sandstone boulders along east edge of test pit at surface.

GEOLOGIC INTERPRETATION: topsoil

(SM)

(visual)

3.5 ft.

1.0 to 3.5 ft. SILTY SAND (SM): Approximately 80% fine sand; approximately 20% nonplastic fines; maximum size is fine sand.

IN-PLACE CONDITION: light brown; dry; excavated easily with an excavator; weak reaction with HCl.

GEOLOGIC INTERPRETATION: backfill

(SC)

(visual)

1-60 lb. sack sample of material from

3.7 ft.

(SC)

(lab class.)

8.0 ft.

3.5 to 8.0 ft. CLAYEY SAND (SC): Approximately 80% fine sand; approximately 15% low plasticity fines; approximately 5% gravel; maximum size is fine gravel to ¾ inch diameter.

IN-PLACE CONDITION: light brown; moist; low dry strength;

low toughness; excavated easily with an excavator;

sidewalls caved in once pit was open to 8.0 ft.; weak reaction with HCl.

LAB TEST DATA: 3.7 ft. – 72% sand; 22% fines; 6% gravel.

LL=36, PL=11, PI=25, Moisture=11.2%, Laboratory Classification is: (SC).

GEOLOGIC INTERPRETATION: backfill

G249

HOLE NO: TP17-B

SHEET 2 OF 2

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SM)

(visual)

1-60 lb. sack sample of material from

10.3 ft.

(SM)

(lab class.)

10.3 ft.

8.0 to 10.3 ft. SILTY SAND (SM): Approximately 85% fine sand; approximately 15% nonplastic fines; maximum size is fine sand.

IN-PLACE CONDITION: light brown; moist to 10.0 ft. then wet to 10.2 ft. and moist from 10.2 to 10.3 ft.; excavated easily with an excavator; sidewalls caving in once pit was open to 8.0 ft.; weak reaction with HCl.

LAB TEST DATA: 10.3 ft. – 81% sand; 19% fines. LL=NP, PL=NP, PI=NP, Moisture=21.3%, Laboratory Classification is: (SM).

GEOLOGIC INTERPRETATION: BACKFILL

REMARKS: Test pit excavation was performed to observe and record geologic information pertinent to removal of groundwater from the proposed excavation for the stilling basin modification.

Trench was terminated at 10.3 ft. in depth due to sidewall caving of the test pit. Water was seeping from a depth of 10.0 to 10.2 ft. at a rate of approximately 0.5 gallon per minute, flowing east (downstream). Excavated material was stockpiled adjacent to the excavation. Re-compaction was conducted with a bobcat placing the silt and sand material back across the bottom of the trench in lifts of approximately one foot thick. The bobcat bucket was used to compact between lifts, then the bobcat was driven over the filled trench several times. This process of re-compaction continued until the trench was returned to grade.

G250

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP17-C

SHEET 1 OF 2

FEATURE: Heart Butte Dam Stilling Basin – North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Test Pit N of Stilling Basin GROUND ELEVATION: 2014.7’ LATITUDE: N 341605.14 degrees LONGITUDE: E 1671041.67 degrees METHOD OF EXPLORATION: Deere 410J Excavator APPROX. DIMENSIONS: 12.0’ long x 3.0’ wide x 13.2’ deep, North LOGGED BY: K. Roccoforte DEPTH TO WATER: 11.0 to 12.5 ft. seep DATE LOGGED: 5/24/2017

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SM)

(visual)

1-60 lb. sack sample of material from

3.5 ft.

(SC-SM)

(lab class.)

3.5 ft.

0.0 to 3.5 ft. SILTY SAND (SM): Approximately 85% fine sand; approximately 15% nonplastic fines; maximum size is fine sand.

IN-PLACE CONDITION: Light brown; dry; soft; low dry strength; low toughness; roots and grass in top 6 inches;

excavated easily with an excavator.

LAB TEST DATA: 3.5 ft. – 55% sand; 27% gravel; 18% fines. LL=22, PL=17, PI=5, Moisture=8.0%, Laboratory Classification is: (SC-SM).

GEOLOGIC INTERPRETATION: backfill s(ML) (visual)

1-60 lb. sack sample of material from

4.7 ft.

(ML)s (lab class.)

4.7 ft.

3.5 to 4.7 ft. SANDY SILT s(ML): Approximately 60% nonplastic fines; approximately 40% fine sand; maximum size is fine sand.

IN-PLACE CONDITION: light brown; moist; soft; low dry strength; low toughness; excavated easily with an excavator;

weak reaction with HCl.

LAB TEST DATA: 4.7 ft. – 70% fines; 29% sand; 1% gravel.

LL=19, PL=16, PI=3, Moisture=14.0%, Laboratory Classification is: (ML)s.

GEOLOGIC INTERPRETATION: backfill

(SC)

(visual)

10.7 ft.

4.7 to 10.7 ft. CLAYEY SAND (SC): Approximately 65% fine sand; approximately 35% low plasticity fines; maximum size is fine sand.

IN-PLACE CONDITION: light brown; moist; excavated easily with an excavator; sidewalls remained vertical during excavation; weak reaction with HCl.

GEOLOGIC INTERPRETATION: backfill

G251

HOLE NO: TP17-C

SHEET 2 OF 2

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SP)g (visual)

1-60 lb. sack sample of material from

12.0 ft.

(SP-SM)

(lab class.)

13.2 ft.

10.7 to 13.2 ft. POORLY GRADED SAND WITH GRAVEL (SP)g: Approximately 55% fine to medium sand;

approximately 35% gravel; approximately 5% cobbles;

approximately 5% nonplastic fines; maximum size is 5 inch diameter.

IN-PLACE CONDITION: light brown; moist to 12.0 ft. then wet to 12.5 ft. and moist from 12.5 to 13.2 ft.; excavated easily with an excavator to 11.0 ft.; moderately difficult excavating through wet gravel at 12.0 ft.; weak reaction with HCl.

LAB TEST DATA: 12.0 ft. – 61% sand; 29% gravel; 10% fines. LL=NP, PL=NP, PI=NP, Moisture=19.4%, Laboratory Classification is: (SP-SM).

GEOLOGIC INTERPRETATION: backfill

5 -- --

REMARKS: Test pit excavation was performed to observe and record geologic information pertinent to removal of groundwater from the proposed excavation for the stilling basin modification.

Trench was terminated at 13.2 ft. in depth due to reaching the extent of the excavator. Water was seeping from a depth of 12.0 ft. at a rate of approximately 1.0 gallon per minute, flowing east (downstream). Excavated material was stockpiled adjacent to the excavation. Re-compaction was conducted with a bobcat placing the silt and sand material back across the bottom of the trench in lifts of approximately one foot thick. The bobcat bucket was used to compact between lifts, then the bobcat was driven over the filled trench several times. This process of re-compaction continued until the trench was returned to grade.

G252

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP17-D

SHEET 1 OF 2

FEATURE: Heart Butte Dam Stilling Basin – North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Test Pit SW Corner of Stilling Basin GROUND ELEVATION: 2025.25’ LATITUDE: N 341558.84 degrees LONGITUDE: E 1670999.88 degrees METHOD OF EXPLORATION: Deere 410J Excavator APPROX. DIMENSIONS: 12.0’ long x 12.0’ wide x 12.0’ deep, NE-SW LOGGED BY: K. Roccoforte DEPTH TO WATER: 6.0 ft. seep DATE LOGGED: 5/24/2017

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SM)bc (visual)

3.0 ft.

0.0 to 3.0 ft. SILTY SAND WITH BOULDERS AND COBBLES (SM)bc: Approximately 60% riprap boulders;

approximately 30% fine sand; approximately 10% nonplastic fines; maximum size is 2.0 ft. diameter.

IN-PLACE CONDITION: riprap sandstone boulders from the right groin drain continued into the test pit to 3.0 ft. depth from the Southwest; the Northeast section of test pit contained silty sand.

GEOLOGIC INTERPRETATION: backfill

10 20 60 s(ML) (visual)

1-60 lb. sack sample of material from

5.0 ft.

s(ML) (lab class.)

7.8 ft.

3.0 to 7.8 ft. SANDY SILT s(ML): Approximately 70% nonplastic fines; approximately 25% fine sand;

approximately 5% gravel; maximum size is 2.0 inch diameter.

IN-PLACE CONDITION: brown; moist to 6.0 ft.; wet from seep at 6.0 ft.; water followed right groin drain into area of test pit; soft; scattered angular brick-red baked shale gravel to 2.0 inches; excavated easily with an excavator; weak reaction with HCl.

LAB TEST DATA: 5.0 ft. – 67% fines; 24% sand; 9% gravel.

LL=NP, PL=NP, PI=NP, Moisture=10.7%, Laboratory Classification is: s(ML).

GEOLOGIC INTERPRETATION: backfill

(SC)

(visual)

1-60 lb. sack sample of material from

7.8 to 9.5 ft.

(SC-SM)

(lab class.)

9.5 ft.

7.8 to 9.5 ft. CLAYEY SAND (SC): Approximately 70% fine sand; approximately 30% low to nonplastic fines;

approximately 5% gravel; maximum size is fine sand.

IN-PLACE CONDITION: brown, gray, black; soft; wet; sand with clay lenses; trace of carbonized grass; excavated easily with an excavator; sidewalls caved in once pit was open to

8.0 ft.; weak reaction with HCl.

LAB TEST DATA: 7.8 to 9.5 ft. – 64% sand; 20% fines; 16% gravel. LL=22, PL=18, PI=4, Moisture=18.7%, Laboratory Classification is: (SC-SM).

GEOLOGIC INTERPRETATION: backfill

G253

HOLE NO: TP17-D

SHEET 2 OF 2

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SP)

(visual)

12.0 ft.

9.5 to 12.0 ft. POORLY GRADED SAND (SP):

Approximately 95% fine sand; approximately 5% nonplastic fines; maximum size is fine sand.

IN-PLACE CONDITION: tan; moist; excavated easily with an excavator; weak reaction with HCl.

GEOLOGIC INTERPRETATION: backfill

REMARKS: Test pit excavation was performed to observe and record geologic information pertinent to removal of groundwater from the proposed excavation for the stilling basin modification.

Trench was terminated at 12.0 ft. in depth due to sidewall caving of the test pit. Water was seeping from a depth of 6.0 ft.

at a rate of approximately 1.5 gallons per minute, flowing east (downstream) from the right groin rip rap drain. Excavated material was stockpiled adjacent to the excavation. Re-compaction was conducted with a bobcat placing the silt and sand material back across the bottom of the trench in lifts of approximately one foot thick. The bobcat bucket was used to compact between lifts, then the bobcat was driven over the filled trench several times. This process of re-compaction continued until the trench was returned to grade.

G254

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-18-01

SHEET 1 OF 1

FEATURE: Heart Butte Dam PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Borrow Area GROUND ELEVATION:

COORDINATES: METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 12’x 3.5’x 8.1’ deep LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 5/16/2018

CLASSIFICATION

GROUP

SYMBOL

(describe sample taken)

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SW-SM)

(visual)

1-5 gal.

bucket

4.5 ft.

0.0’ to 6.0’ – WELL GRADED SAND WITH SILT (SW-SM): Approximately 90% fine sand; about 10% nonplastic fines; trace gravel. Max size recovered, 3.5” x 2” x 1.5”

IN-PLACE CONDITION: Brown; moist; soft; homogenous; strong reaction with HCl.

LAB RESULTS: 4.5 feet – 33.8% fines; 63.8% sand, 2.4% gravel; LL=NP;

PI=NP; Laboratory Classification is Silty Sand (SM)

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

(SP-SM)g (visual)

2-5 gal.

buckets

7.0 ft.

6.0’ to 8.1’ POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM)g:

Approximately 70% poorly graded sand; approximately 20% coarse gravel;

approximately 10% non plastic fines. Max size recovered 7” x 6” x 4”.

IN-PLACE CONDITION: Brown; moist; soft; strong reaction with HCl.

4% 1%

REMARKS: Test pit was performed to investigate material properties for a proposed borrow area.

Test pit was terminated at 8.1 ft upon reaching target depth.

G255

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-18-2

SHEET 1 OF 1

FEATURE: Heart Butte Dam PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Borrow Area GROUND ELEVATION:

COORDINATES: METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 15’x 3.0’x 7.9’ deep LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 5/16/2018

CLASSIFICATION

GROUP

SYMBOL

(describe sample taken)

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SW-SM)

(visual)

1-5 gal.

bucket

3.0 ft.

0.0’ to 4.5’ – WELL GRADED SAND WITH SILT (SW-SM): Approximately 90% fine sand; about 10% nonplastic fines.

IN-PLACE CONDITION: Brown; moist; soft; homogenous; strong reaction with HCl.

LAB RESULTS: 4.5 feet – 34.1% fines; 64.1% sand, 1.8% gravel; LL=NP;

PI=NP; Laboratory Classification is Silty Sand (SM)

(SP-SM)g (visual)

2-5 gal.

buckets

5.0 ft.

4.5’ to 7.9’ POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM)g:

Approximately 65% poorly graded sand; approximately 25% coarse gravel;

approximately 10% non plasic fines. Max size recovered 5-inches.

IN-PLACE CONDITION: Brown; moist; soft; strong reaction with HCl.

4% 1%

G256

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-18-3

SHEET 1 OF 1

FEATURE: Heart Butte Dam PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Borrow Area GROUND ELEVATION:

COORDINATES: METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 13’x 3.3’x 7.9’ deep LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 5/16/2018

CLASSIFICATION

GROUP

SYMBOL

(describe sample taken)

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SW-SM)

(visual)

1-5 gal.

bucket

5.0 ft.

0.0’ to 7.9’ – SILTY SAND (SM): Approximately 85% fine to medium sand;

approximately 15% nonplastic fines.

IN-PLACE CONDITION: Rust brown; moist; soft; homogenous; strong reaction with HCl.

LAB RESULTS: 4.5 feet – 18.2% fines; 80.6% sand, 1.2% gravel; LL=22;

PI=3; Laboratory Classification is Silty Sand (SM)

G257

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-24-01

SHEET 1 OF 2

FEATURE: Heart Butte Dam, North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Left Abutment Borrow Area GROUND ELEVATION: 2101.1 COORDINATES: N 343,316 E 1,639,686 METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 12.0 ft L x 3.0 ft W x 2.0 ft D LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 1/23/2024

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

SP-SM

1.5 ft

0.0 ft to 1.5 ft – POORLY GRADED SAND WITH SILT, SP-SM:

Approximately 85% fine grained, hard, subangular to subrounded sand;

approximately 10% non-plastic fines; approximately 5% gravel; weak to medium reaction with HCl.

IN-PLACE CONDITION: Brown, dry, hard (frozen).

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

Sandstone

2.0 ft

1.5 ft to 2.0 ft – SANDSTONE, ss: Quartzose sandstone composed of subrounded to rounded very fine to medium sand, poorly cemented and friable, intensely weathered (W7), very soft (H7), no reaction with HCl.

IN-PLACE CONDITION: Thickly bedded, dry, brown. Easily excavated with the backhoe and disaggregated to sand and cobble sized sandstone fragments.

GEOLOGIC INTERPRETATION: Bullion Creek Formation (Tb)

REMARKS: Test pit easily excavated by backhoe. Test pit terminated after confirming bedrock. Backfilled with excavated material, recompacted to original ground surface in 1 ft lifts.

EQUIPMENT OPERATOR: J. Gedde – Missouri Basin Geology and Exploration Services (MB-2300) COORDINATE SYSTEM: US Survey feet – North Dakota South Zone

G258

Details: TP-24-01 Test Pit Diagram Project: Pick-Sloan Missouri Basin Date: 01/23/2024 Feature: Heart Butte Dam, ND Logged by: J. Lasater Operator: J. Gedde

12.0’

3.0’

2.0’

SP-SM

Sandstone

Stake for survey

Note: Not to Scale Illustration Purposes Only

010° Azimuth

1.5’

(Qal)

(Tb)

G259

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-24-02

SHEET 1 OF 2

FEATURE: Heart Butte Dam, North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Left Abutment Borrow Area GROUND ELEVATION: 2093.3 COORDINATES: N 343,292 E 1,640,013 METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 12.0 ft L x 3.0 ft W x 2.0 ft D LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 1/23/2024

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

Sandstone

2.0 ft

0.0 ft to 2.0 ft – SANDSTONE, ss: Quartzose sandstone composed of subrounded to rounded very fine to medium sand, poorly cemented and friable, intensely weathered (W7), very soft (H7), no reaction with HCl.

IN-PLACE CONDITION: Thickly bedded, dry, brown. Easily excavated with the backhoe and disaggregated to sand and cobble sized sandstone fragments.

GEOLOGIC INTERPRETATION: Bullion Creek Formation (Tb)

REMARKS: Test pit easily excavated by backhoe. Test pit terminated after confirming bedrock. Backfilled with excavated material, recompacted to original ground surface in 1 ft lifts.

EQUIPMENT OPERATOR: J. Gedde – Missouri Basin Geology and Exploration Services (MB-2300)

G260

Details: TP-24-02 Test Pit Diagram Project: Pick-Sloan Missouri Basin

Logged by: J. Lasater Operator: J. Gedde

12.0’

3.0’

2.0’ Sandstone

Stake for survey

Note: Not to Scale Illustration Purposes Only

090° Azimuth

G261

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-24-03

SHEET 1 OF 2

FEATURE: Heart Butte Dam, North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Left Abutment Borrow Area GROUND ELEVATION: 2069.1 COORDINATES: N 343,348 E 1,640,529 METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 14.0 ft L x 3.0 ft W x 5.4 ft D LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 1/24/2024

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

(SP-SM)g

2.3 ft

0.0 to 2.3 ft – POORLY GRADED SAND WITH SILT, (SP-SM)g:

Approximately 75% fine grained, hard, subangular to subrounded sand;

approximately 15% rounded to subrounded, sedimentary gravel;

approximately 10% non-plastic fines; max size 1.5 inches, weak to medium reaction with HCl.

IN-PLACE CONDITION: Brown, dry, hard (frozen).

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

2.9 ft

2.3 to 2.9 ft – POORLY GRADED SAND, SP: Approximately 90% fine grained, hard, subangular to subrounded sand; approximately 5% non-plastic fines; approximately 5% rounded to subrounded, sedimentary gravel;

max size 1 inch, strong reaction with HCl.

IN-PLACE CONDITION: Brown, moist, soft.

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

Sandstone

5.4 ft

2.9 ft to 5.4 ft – SANDSTONE, ss: Quartzose sandstone composed of subrounded to rounded very fine to medium sand, poorly cemented and friable, intensely weathered (W7), very soft (H7), no reaction with HCl.

IN-PLACE CONDITION: Thickly bedded, dry, brown. Easily excavated with the backhoe and disaggregated to sand and cobble sized sandstone fragments.

GEOLOGIC INTERPRETATION: Bullion Creek Formation (Tb)

REMARKS: Test pit easily excavated by backhoe. Test pit terminated after confirming bedrock. Backfilled with excavated material, recompacted to original ground surface in 1 ft lifts.

EQUIPMENT OPERATOR: J. Gedde – Missouri Basin Geology and Exploration Services (MB-2300)

G262

Details: TP-24-03 Test Pit Diagram Project: Pick-Sloan Missouri Basin Date: 01/24/2024 Feature: Heart Butte Dam, ND

14.0’

5.4’

(SP-SM)g

Sandstone

Stake for survey

Note: Not to Scale Illustration Purposes Only

090° Azimuth

2.3’

(Qal)

(Tb) SP

2.9’

G263

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-24-04

SHEET 1 OF 2

FEATURE: Heart Butte Dam, North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Left Abutment Borrow Area GROUND ELEVATION: 2056.2 COORDINATES: N 343,113 E 1,640,568 METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 8.0 ft L x 3.0 ft W x 1.0 ft D LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 1/24/2024

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch s(CL)

0.9 ft

0.0 to 0.9 ft – SANDY LEAN CLAY, s(CL): Approximately 60% low-medium plasticity fines; approximately 35% fine grained, hard, subangular to subrounded sand; approximately 5% rounded to subrounded, sedimentary gravel; max size 1 inch, weak to no reaction with HCl.

IN-PLACE CONDITION: Brown, dry, hard (frozen).

GEOLOGIC INTERPRETATION: Quaternary Alluvium (Qal)

Sandstone

1.0 ft

0.9 ft to 1.0 ft – SANDSTONE, ss: Quartzose sandstone composed of subrounded to rounded very fine to medium sand, poorly cemented and friable, intensely weathered (W7), very soft (H7), no reaction with HCl.

IN-PLACE CONDITION: Dry, brown. Easily excavated with the backhoe and disaggregated to sand and cobble sized sandstone fragments.

GEOLOGIC INTERPRETATION: Bullion Creek Formation (Tb)

REMARKS: Test pit easily excavated by backhoe. Test pit terminated after confirming bedrock. Backfilled with excavated material, recompacted to original ground surface in 1 ft lifts.

EQUIPMENT OPERATOR: J. Gedde – Missouri Basin Geology and Exploration Services (MB-2300)

G264

Details: TP-24-04 Test Pit Diagram Project: Pick-Sloan Missouri Basin

Logged by: J. Lasater Operator: J. Gedde

8.0’

3.0’

1.0’ s(CL)

Sandstone

Stake for survey

Note: Not to Scale Illustration Purposes Only

095° Azimuth

0.9’

(Qal)

G265

Bureau of Reclamation LOG OF TEST PIT OR AUGER HOLE HOLE NO: TP-24-05

SHEET 1 OF 2

FEATURE: Heart Butte Dam, North Dakota PROJECT: Pick-Sloan Missouri Basin AREA DESIGNATION: Left Abutment Borrow Area GROUND ELEVATION: 2065.2 COORDINATES: N 343,139 E 1,640,114 METHOD OF EXPLORATION: Deere 410J backhoe APPROXIMATE DIMENSIONS: 12.0 ft L x 3.0 ft W x 2.6 ft D LOGGED BY: J. Lasater DEPTH TO WATER: Not Encountered DATE(S) LOGGED: 1/24/2024

CLASSIFICATION

GROUP

SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL

SEE USBR 5000, 5005

% PLUS 3 inch

(BY VOLUME)

3 – inch

5 – inch

PLUS

inch

1.7 ft

0.0 ft to 1.7 ft – SILTY SAND, SM: Approximately 75% fine grained, hard, subangular to subrounded sand; approximately 20% non to low plasticity fines; approximately 5% gravel; max…

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File details come from the government source that posted it. Updated Jun 3, 2026.