J_5_Geology_Drawings.pdf

G1

Feature: Project:

Location:

Coordinates:

Datum: C. Haynes

0.0 - 5.6 Feet

NOTES

The excavator utilized a 2.5 foot toothed all purpose bucket. TD = Total Depth was extent of machine capabilities. All excavations were re-filled and abandoned with the excavated native material. Compaction was completed by tracking the excavator over the excavation repetitively.

COBBLES AND

BOULDERS

Field Classification

0.0 to 5.6 Feet: COBBLES AND BOULDERS WITH SILTY SAND WITH GRAVEL. About 40% coarse to fine, subangular to subround sand. About 30% fine to coarse, hard, subangular gravel. About 30% non-plastic fines.

TOTAL SAMPLE BY VOLUME: About 30% 3 to 5-inch and about 20% 5 to 12-inch, hard subangular to subrounded cobbles. About 15% subangular boulders.

LABORATORY DATA: 5.6 feet: SILTY GRAVEL WITH SAND (GM)s: 1% clay, 13% silt, 44% sand, 42% gravel, water content 9.7%.

IN PLACE CONDITIONS: Maximum size 26x11x9-inch; light brown, high reaction to HCL, and dry. Well indurated and hard to dig through.

TD 5.6-feet.

30 20 15

(GM)s Lab

Classification

% PLUS 3-INCH BY VOLUME

3-5 INCH 5-12

INCH

PLUS 12

INCH

7/20/2021Approx. Dimensions: Date Of Exploration:

FIELD

CLASSIFICATION

GROUP SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL (SEE USBR 5000,5005)

Latitude Longitude Logged By:

Water Encountered:

Not recorded

None 5 x 10 x 5.6

Yanmar SV 100

A. Brusak

Bureau Of Reclamation TEST PIT LOG Hole No. RTP-21-1 Kachess Dam Yakima Project

Proposed new access road alignment. Reviewed by:

Method of Exploration:

Coordinates:

Datum: C. Haynes, A. Canner

0.0 - 8.0 Feet

8.0 - 10.5 Feet

10.5 - 12.0 Feet s(GP-GM)cb Field

Classification

10.5 to 12.0 Feet: SANDY POORLY GRADED GRAVEL WITH SILT, COBBLES AND BOULDER s(GP-GM)cb. About 50% fine to coarse, subrounded to subangular, hard gravel. About 40% fine to coarse, subangular to subrounded, sand. About 10% low to no plasticity fines with low toughness and low dry strength.

TOTAL SAMPLE BY VOLUME: about 30% 3 to 5-inch, about 10% 5 to 12-inch subrounded cobbles. About 5% boulders.

LABORATORY DATA: 11.0 feet: WELL GRADED GRAVEL WITH SAND (GW)s: 1% clay, 2% silt, 32% sand, 65% gravel, water content 6.6%.

IN PLACE CONDITIONS: Maximum size was 13-inch; light brown, mild reaction to HCl, and dry.

30 10 5

(GW)s Lab

Classification

NOTES

The excavator utilized a 2.5 foot toothed all purpose bucket. TD = Total Depth was extent of machine capabilities. All excavations were re-filled and abandoned with the excavated native material. Compaction was completed by tracking the excavator over the excavation repetitively.

g(SP-SM)c Field

Classification

8.0 to 10.5 Feet: GRAVELLY POORLY GRADED SAND WITH SILT AND COBBLES g(SP-SM)c.

About 50% fine to coarse, subangular to subrounded, sand. About 40% fine to coarse, subrounded to subangular, hard gravel. About 10% low to no plasticity fines with low toughness and low dry strength.

TOTAL SAMPLE BY VOLUME: about 20% 3 to 5-inch, about 5% 5 to 12-inch subrounded cobbles.

LABORATORY DATA: 8.0 feet: POORLY GRADED SAND WITH SILT, GRAVEL AND COBBLES (SP-SM)gc: 1% clay, 4% silt, 54% sand, 41% gravel, water content 4.6%.

IN PLACE CONDITIONS: Maximum size was 10-inch; light to dark brown, mild reaction to HCl, and dry to slightly moist. Wood and other organic debris present.

20 5 0

(SP-SM)gc Lab

Classification

(SM)gc Field

Classification

0.0 to 8.0 Feet: SILTY SAND WITH GRAVEL AND COBBLES (SM)gc. About 65% fine to coarse, subangular to rounded, sand. About 20% low to no plasticity fines with low toughness and low dry strength. About 15% fine to coarse, subrounded to subangular, hard gravel.

TOTAL SAMPLE BY VOLUME: Trace 3 to 5-inch subrounded cobbles.

LABORATORY DATA: 5.0 feet: SILTY SAND (SM): 2% clay, 14% silt, 84% sand, water content 5.5%.

IN PLACE CONDITIONS: Maximum size was 6-inch; light brown, no reaction to HCl, and dry.

From 6.2-feet to 6.8 feet a small zone of SILTY GRAVEL WITH SAND (GM)s. Large amounts of wood and non-degraded organic material throughout.

Trace 0 0

(SM)

Lab

Classification

Approx. Dimensions: Date Of Exploration:

FIELD

CLASSIFICATION

GROUP SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL (SEE USBR 5000,5005)

% PLUS 3-INCH BY VOLUME

3-5 INCH 5-12

INCH

PLUS 12

INCH

7/20/2021, 10/27/21

Latitude Longitude Logged By:

Water Encountered:

Not recorded

14.5' 7/20/21, 18' 10/27/21 7 x 16 x 23

Yanmar SV 100, and Cat 320D L

A. Brusak

Bureau Of Reclamation TEST PIT LOG Hole No. TT-21-1 Kachess Dam Yakima Project

Toe of the dam left of outlet works. Reviewed by:

Method of Exploration:

Coordinates:

Datum: C. Haynes, A. Canner

12.0 - 13.0 Feet

13.0 - 18.0 Feet

18.0 - 23.0 Feet

NOTES

The excavator utilized a 2.5 foot toothed all purpose bucket. TD = Total Depth was extent of machine capabilities. All excavations were re-filled and abandoned with the excavated native material. Compaction was completed by tracking the excavator over the excavation repetitively.

(ML)sgc Field

Classification

18.0 to 23.0 Feet: SILT WITH SAND AND COBBLES (ML)sgc. About 60% nonplastic fines.

About 20% fine sand. About 20% fine to coarse, subrounded to subangular, hard gravel.

TOTAL SAMPLE BY VOLUME: Trace 3 to 5-inch subround to round cobbles.

LABORATORY DATA: No sample collected.

IN PLACE CONDITIONS: Maximum size 6-inch; light to dark grey, no reaction with HCl. Wet to very wet with free flowing water.

TD on October 27th 23.0-feet.

Trace 0 0

No Lab Classification

(GP-GM)scb Field

Classification

13.0 to 18.0 Feet: POORLY GRADED GRAVEL WITH SILT, SAND, COBBLES AND BOULDERS (GP-GM)scb. About 70% fine to coarse, subrounded to subangular, hard gravel. About 20% fine to coarse, subangular to subrounded, sand. About 10% low to no plasticity fines with low toughness and low dry strength.

TOTAL SAMPLE BY VOLUME: About 15% 3 to 5-inch cobbles, about 20% 5 to 12-inch cobbles. Trace boulders.

LABORATORY DATA: 13.0 feet: WELL GRADED GRAVEL WITH SILT AND SAND (GW-GM)s:

1% clay, 4% silt, 40% sand, 55% gravel, water content 9.2%.

IN PLACE CONDITIONS: Maximum size 18-inch boulder; light to dark brown, no reaction with HCl. From 12.0 to 13.0 feet the material was dry. From 13.0 to 16.0-feet the material was moist to wet.

TD on July 20th 16.0-feet.

15 20 Trace

(GW-GM)s Lab Classification g(SM)c Field

Classification

12.0 to 13.0 Feet: GRAVELLY SILTY SAND WITH COBBLES g(SM)c. About 45% fine to coarse, subangular to subrounded, sand. About 40% fine to coarse, subrounded to subangular, hard gravel. About 15% low to no plasticity fines with low toughness and low dry strength.

TOTAL SAMPLE BY VOLUME: Trace 3 to 5-inch, and trace 5 to 12-inch cobbles.

IN PLACE CONDITIONS: Maximum size 18-inch boulder; light to dark brown, no reaction with HCl. From 12.0 to 13.0 feet the material was dry. From 13.0 to 16.0-feet the material was moist to wet.

Trace Trace 0

No Lab Classification

3-5 INCH 5-12

INCH

PLUS 12

INCH

7/20/2021, 10/27/21Approx. Dimensions: Date Of Exploration:

FIELD

CLASSIFICATION

GROUP SYMBOL

CLASSIFICATION AND DESCRIPTION OF MATERIAL (SEE USBR 5000,5005)

Logged By:

Water Encountered:

% PLUS 3-INCH BY VOLUME

Not recorded 14.5' 7/20/21, 18' 10/27/21 7 x 16 x 23 .

Reviewed by:

Method of Exploration:

Latitude Longitude

Yanmar SV 100, and Cat 320D L

A. Brusak

Kachess Dam Yakima Project

Bureau Of Reclamation TEST PIT LOG Hole No. TT-21-1

Toe of the dam left of outlet works.

F ig u re

A p p ro xi m at e te st p it a n d d ri ll h o le lo ca ti o n s.

Esri

R10 CGB | Date Saved: 12/14/2021 | File Path: C:\Users\ebell\Documents\TeleworkFiles\Geology\Kachess_DamRepair_121421\Kachess_DamRepair_121421.aprx

0 250 500125

US Feet

Kachess River Rd

K a ch e ss

R ive r

Kachess R iver

Kachess River Rd

TT-21-01

CL5+oo

Washington DOE well

RTP-21-1

Cle Elum Dam

Kachess Dam

Keechelus Dam

Legend

Drill Hole

Test Pit

Trench

Seep Wet Area

Data Sources: USBR and Esri Basemaps

Kachess Dam

PHASE 2 - EXPLORATION

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A

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Plasticity Index

LI

M

IT

S

In-Situ Water Content

IN

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LA

C

E C

O

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IT

IO

NS

SP

EC

IF

IC

Maximum Dry Unit Weight lb/ft

Minus #4

Plus #4 (Apparent)

Minimum Dry Unit Weight lbf/ft

In-Situ Dry Unit Weight lbf/ft

VI

BR

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(fe et

Cobbles (3 inch to 5 inch)

Cobbles (5 inch to 12 inch)

Liquid Limit

LAB CLASSIFICATION

C O

NS

IS

TA

NC

Y

Fines (passing #200) (<0.075 mm)

Sand (#200 to #4)

Gravel (#4 to 3 inch)

PA

RT

IC

LE

SI

ZE

F

RA

C

TI

O

N G

RA

VI

TY

Absorption

Relative Density