AttachmentJ6_SaddleCampPitPreliminaryEvaluation.pdf

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PRELIMINARY PIT EVALUATION

SADDLE CAMP PIT

CLEARWATER NATIONAL FOREST

VICINITY OF KOOSKIA, IDAHO

ALLWEST PROJECT NO. 318-176G

USFS TASK ORDER NO. AG-0343-D-18-XXXX

USFS CONTRACT NO. AG-0343-C-17-0059

November 6, 2018

Prepared for:

DJ&A, P.C.

2303 Russell Street Missoula, Montana 59801

Prepared by:

ALLWEST Testing & Engineering, Inc.

2705 E. Main Street

Lewiston, Idaho 83501

Construction Materials Testing & Special Inspection Geotechnical Engineering Environmental Consulting

Non-Destructive Testing Welder Certification

2705 E. Main Street, Lewiston, ID 83501 • Phone: (208) 743-5710 • Fax: (208) 743-8270 Hayden, ID • Lewiston, ID • Meridian, ID • Spokane Valley, WA www.allwesttesting.com

November 6, 2018

Mr. Mike Jensen, P.E.

DJ&A, P.C.

3203 Russell Street Missoula, Montana 59801

RE: Preliminary Pit Evaluation Saddle Camp Pit, Clearwater National Forest Vicinity of Kooskia, Idaho USFS Task Order No. AG-0343-D-18-XXXX USFS Contract No. AG-0343-C-17-0059 ALLWEST Project No. 318-176G

Mr. Jensen:

ALLWEST Testing and Engineering, Inc. (ALLWEST) has completed the preliminary evaluation for the above referenced pit. The approximate location of the source site is shown on the attached Vicinity Map, Figure A-1. We understand the pit is being considered as an aggregate source for United States Forest Service projects. The attached report presents the results of the field and laboratory evaluation and our recommendations.

We appreciate the opportunity to work with you on this project. If you have any questions or need additional information, please do not hesitate to call us at (208) 743-5710.

Sincerely, ALLWEST Testing & Engineering, Inc.

Prepared by: Reviewed by:

Shawn Turpin, P.E. James Thomasson, P.E.

Senior Geotechnical Engineer Senior Geotechnical Engineer

TABLE OF CONTENTS

ALLWEST Project No. 318-176G

Saddle Camp Pit Clearwater National Forest www.allwesttesting.com

Page

1.0 SCOPE OF SERVICES

2.0 SITE CONDITIONS

2.1 General Geologic Conditions

2.2 General Soil Conditions

3.0 SUBSURFACE CONDITIONS

3.1 Subsurface Soil and Rock Conditions

3.2 Groundwater Conditions

4.0 LABORATORY TESTING

5.0 SUMMARY OF FINDINGS, CONCLUSIONS AND RECOMMENDATIONS

6.0 EVALUATION LIMITATIONS

Appendix A – Vicinity Map, Test Pit Location Map, Geologic Map, Site and Test Pit Photographs Appendix B – Test Pit Logs, AASHTO and Unified Soil Classification Systems Appendix C – Laboratory Test Results www.allwesttesting.com

PRELIMINARY PIT EVALUATION

SADDLE CAMP PIT

NEZ PERCE-CLEARWATER NATIONAL FOREST

ALLWEST Testing and Engineering, Inc. (ALLWEST) has completed the preliminary evaluation for the above referenced pit. The approximate location of the source site is shown on the attached Vicinity Map, Figure A-1. We understand the pit is being considered as an aggregate source for United States Forest Service (USFS) projects. This report details the results of the field evaluation and laboratory testing and presents our conclusions and recommendations.

1.0 SCOPE OF SERVICES

Our scope of services included the following:

1) Reviewed soil and geologic mapping and readily available aerial photography of the site.

2) Observed the excavation of six test pits at the site. The test pits were excavated with a rubber-tire backhoe subcontracted from Cook and Sons Construction. The latitude, longitude and elevation of each test pit was recorded with a handheld global positioning system (GPS) unit.

Photographs of the test pit excavations and pit were taken.

3) The soil and rock observed in the test pits was described and classified in general accordance with the American Association of State Highway and Transportation Officials (AASHTO) and Unified Soil Classification System (USCS). The subsurface profiles observed in the test pits were described and recorded.

4) Performed laboratory tests on select soil and rock samples to assess some of the soil and rock properties.

5) Prepared and submitted this report providing a summary of our findings, recommendations and conclusions.

Our services were provided in general accordance with our proposal dated July 12, 2018.

2.0 SITE LOCATION AND DESCRIPTION

The project is located at latitude 46.493341° and longitude -115.091368° in the southeast ¼ of the northwest ¼ of Section 4, Township 36 North, Range 11 East of the Boise Meridian. The site consists of a previously mined pit. A steep exposed bedrock slope is present along the west side of the pit. The pit floor is located east of the slope. Two fairly large piles of waste material, consisting of on-site soil and cobbles

Preliminary Pit Evaluation ALLWEST Project No. 318-176G Saddle Camp Pit Page 2 www.allwesttesting.com and boulders are present on the pit floor. A bench area is located on the southern portion of the site between the pit floor and exposed slope face. Vegetation consists of weeds, grasses and small trees. The site is bound by a steep downward slope to the east and south. Photographs of the site are included in Appendix A.

2.1 General Geologic Conditions

The geology for the project area is mapped on the “Geologic Map of the Kooskia 30 x 60 Quadrangle, Idaho, Lewis, R.S., et al, 2007. The mapping depicts the project area as Eocene aged equigranular biotite Granite (Tg). The majority of the rock formation observed in the project consisted of an equigranular granitoid that was white to gray in color with a small percentage of biotite. The observed rock formation appears to be generally consistent with the geologic mapping. We also observed to a lesser degree a light gray granitoid rock that appears to correspond to the mapped unit of dacite (Tpd). The dacite is described as porphyritic dacite in a gray aphanitic groundmass that occures in dikes and plugs. These dikes and/or plugs are seen as lines on the geologic map north and south west of the project site.

The mapped geology is shown on Figure A-3 in Appendix A.

2.2 General Soil Conditions

The USDA Natural Resources Conservation Service (NRCS) has mapped the overburden soil on the site as Entic cryandepts (mountain slopes) on the northern portion of the site and Andic cryochrepts (dissected stream breaklands) on the southern portion of the site. Both units are reported to consist of volcanic ash over alluvium derived from granite. The NRCS rates both soil formations as “poor” for gravel and roadfill sources.

3.0 SUBSURFACE CONDITIONS

Six test pits were excavated at the site with a subcontracted rubber-tire backhoe provided by Cook and Sons Construction. The test pits were excavated at the approximate locations shown on the Test Pit Location Map, Figure A-2, in Appendix A of this report. The latitude, longitude and elevation of each of the test pits was measured with a Topcon GRS-1 handheld GPS unit. A summary of the test pit locations and elevations is provided in the following table.

Test Pit No. Latitude Longitude Elevation (feet)

TP-1 46.493615 -115.091327 5,111.5

TP-2 46.493464 -115.091097 5,101.3

TP-3 46.493339 -115.091388 5,104.9

TP-4 46.493159 -115.091490 5,115.2

TP-5 46.493133 -115.091255 5,095.0

TP-6 46.492980 -115.091525 5,091.7

The test pit locations and elevations are based on NAD83 (2011) datum.

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The soil/rock conditions observed in the test pits were visually described and classified in general accordance with ASTM D 2487 and D 2488 and the subsurface profiles were logged. Bulk samples of the soil and bedrock encountered were obtained for laboratory testing. The test pits were loosely backfilled with excavation spoils. Photographs of the test pits are provided in Appendix A.

3.1 Subsurface Soil and Rock Conditions

The subsurface soil profile observed in the test pits generally consisted of silty sand with gravel overlying granite bedrock. Approximately 4 feet of undocumented fill was observed in test pit TP-5. Practical excavator refusal was encountered in each of the test pits on granite bedrock at depths ranging from approximately 1½ to 5½ feet below the existing ground surface. Descriptions of the soil types observed follow.

Undocumented fill – The undocumented fill consists of silty sand with gravel. It contains cobbles and boulders. It is loose, moist, predominantly fine-grained, and brown in color.

Silty sand with gravel – The silty sand with gravel contains varied amounts of cobbles and roots. It is loose to medium dense, slightly moist to moist, predominantly fine-grained, and brown in color.

Cobbles and boulders (talus) – The cobbles and boulders are infilled with silty sand. It is medium dense, slightly moist, angular, fine-grained sand, and brown (sand) to gray (cobbles and boulders) in color.

Granite – The granite bedrock is very hard, dry to slightly moist, slightly to moderately fractured and light gray to gray to dark gray in color.

3.2 Groundwater Conditions

Groundwater was not observed in the test pits at the time of excavation to the maximum depth explored, approximately 5½ feet below the existing ground surface. Changes in precipitation, construction or other factors may impact the depth to groundwater on the property. Fluctuations in the groundwater level should be expected. An evaluation of these changes is beyond the scope of this report.

Detailed descriptions of the subsurface conditions observed in the test pits are presented on the test pit logs in Appendix B of this report. The descriptive soil terms used on the boring logs and in this report can be referenced by the USCS. A copy of the USCS is included in Appendix B. The subsurface conditions may vary between test pit locations. Such changes in conditions would not be apparent until further excavation is performed.

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4.0 LABORATORY TESTING

Laboratory testing was performed to supplement field classifications and to assess some of the soil and rock engineering characteristics. The laboratory testing was performed by ALLWEST. The laboratory tests included the following.

Test Test Method Gradation AASHTO T27 and T11 Hydrometer AASHTO T88 Atterberg Limits AASHTO T89 and T90 Fractured Faces ASTM D5821 Flat and Elongated Particles ASTM D4791 Clay Lumps and Friable Particles AASHTO T112 Sand Equivalent AASHTO T176 L.A. Abrasion AASHTO T96 Sodium Sulfate Soundness AASHTO T104 Durability Index AASHTO T210 Specific Gravity and Absorption AASHTO T84 & T85

5.0 SUMMARY OF FINDINGS, CONCLUSIONS AND RECOMMENDATIONS

The following summary is provided based on the observed site and subsurface conditions and laboratory test results.

• The on-site overburden soils tested do not meet the FP-14 Standard Specification for base, subbase and surface course aggregates due to the presence of clay lumps and friable particles. The test results for clay lumps and friable particles range from 0.1 to 0.9 percent. The FP-14 Standard Specification for base, subbase and surface course aggregates is 0.0 percent.

The overburden soils generally do not meet the gradation requirements for base, subbase and surface course aggregates.

In addition, the sodium sulfate soundness loss for fine aggregate from the test pit TP-6 sample from 3 to 5 feet exceeds the FP-14 specification of a maximum loss of 12 percent. The test result from this sample was 16.7 percent loss.

The materials tested meet the other FP-14 Standard Specifications for base, subbase and surface course aggregates.

• The soils tested meet FP-14 Standard Specifications for unclassified borrow, except for the sample from test pit TP-2 at 0 to 1 foot. This sample classifies as AASHTO A-4 soil. The specification for unclassified borrow requires AASHTO soil classifications of A-1, A-3 or A-2-4.

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• The soils tested meet the FP-14 Standard Specification for liquid limit for select borrow but do not meet the gradation specification.

• The soils tested meet the FP-14 Standard Specification for plasticity index and

LA Abrasion for select granular backfill but generally do not meet the gradation specification. Additionally, the soils tested meet the specifications for sodium sulfate soundness, except for test pit TP-6 from 3 to 5 feet. FP-14 includes a specification for angle of internal friction, which was not included in our scope of services.

• Although the soil samples tested do not meet all specifications for base aggregates, subbase aggregates, surface course aggregates, unclassified borrow, select borrow, and select granular borrow, it appears the on-site granite bedrock will meet these requirements when crushed and processed based on the rock test results.

• The rock samples tested meet the FP-14 Standard Specifications for gabion rock, riprap and rockery rock.

• Based on the test results, it is our professional opinion the Saddle Camp Pit is a viable rock source for United States Forest Service project aggregates, borrow material and rock products. As discussed, the soils at the site may not meet all specifications for aggregates and/or borrow. It should be noted the on-site soils are a minor component of material available at the site.

6.0 EVALUATION LIMITATIONS

This report has been prepared to assist with determining the suitability of use of the Saddle Camp pit for an aggregate source for USFS projects in the area of the pit. Our services consist of professional opinions and conclusions made in accordance with generally accepted geotechnical engineering principles and practices in the local area at the time this report was prepared. This acknowledgement is in lieu of all warranties, express or implied.

The following appendices complete this report:

Appendix A – Vicinity Map, Test Pit Location Map, Geologic Map, Site and Test Pit Photographs Appendix B – Test Pit Logs, AASHTO and Unified Soil Classification Systems Appendix C – Laboratory Test Results

Preliminary Pit Evaluation

Project No. 318-176G

Appendix A

Vicinity Map Test Pit Location Map

Geologic Map Site and Test Pit Photographs

Lewiston, Idaho www.allwesttesting.com

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FIGURE A-1 - VICINITY MAP

Saddle Camp Pit

Forest Service Road 5905

Idaho County, Idaho

Client Name: DJ&A, P.C.

Project No.: 318-176G

Date: November 2018

USGS 7.5 MINUTE SERIES TOPOGRAPHIC MAP

GREYSTONE BUTTE, IDAHO, QUADRANGLE

DIAGRAM IS FOR GENERAL LOCATION ONLY

SITE

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FIGURE A-2 - TEST PIT LOCATION MAP

Saddle Camp Pit

Forest Service Road 5905

Idaho County, Idaho

Client Name: DJ&A, P.C.

Project No.: 318-176G

Date: November 2018

GOOGLE EARTH, 2018

(Image date Sept. 27, 2016) DIAGRAM IS FOR GENERAL LOCATION ONLY

Approximate test pit location

TP-2

TP-1

TP-3

TP-4

TP-5

TP-6

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FIGURE A-3 - GEOLOGIC MAP

Saddle Camp Pit

Forest Service Road 5905

Idaho County, Idaho

Client Name: DJ&A, P.C.

Project No.: 318-176G

Date: November 2018

Reference: “Geologic Map of the Kooskia 30 x 60 Quadrangle, Idaho”, Lewis, Burmester, Kauffman, Brenkenridge, Schmidt, McFaddan, Meyers, Idaho Geologic Survey, 2007

SITE

Tg - Granite (Eocene) Tpd - Porphyritic dacite dykes and plugs

Site Photographs Site Name: Saddle Camp Pit

Date Taken: September 19 & 27, 2018

Photo #1 View of exposed slope on north end of pit looking north.

Photo #2 View of waste soil area adjacent exposed slope face on north end of pit looking northeast.

Photo #3 View of bench on south end of pit looking west.

Photo #4 View of top of bench on south end of pit looking southwest.

Photo #5 View of entrance to pit (south end) looking northeast.

Photo #6 View of south pit floor looking southwest.

Bench on right.

Photo #7 View of test pit TP-1. Photo #8 View of test pit TP-2.

Photo #9 View of test pit TP-3. Photo #10 View of test pit TP-4.

Photo #11 View of test pit TP-5. Photo #12 View of test pit TP-6 after backfilling.

Appendix B

Test Pit Logs AASHTO and Unified Soil Classification Systems

BK

Silty SAND with gravel (A-1-b); medium dense, slightly moist, predominantly fine-grained, significant roots to 8-inches, light brown

GRANITE; very hard, slightly fractured, dark gray

Practical excavator refusal on granite at 2-1/2 feet

S M

G R

A N

IT

E

EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 2.5'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'37.014" (46.493615°)

LONGITUDE (DEGREES): W -115°5'28.7772" (-115.091327°)

TEST PIT 1

EXCAVATOR:

Elevation 5,111.5 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

S A

M P

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U S

C S

WEATHER:

G R

A P

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L O

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D E

P T

H ft

9/27/2018

PROJECT: 318-176G

SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

LEWISTON, IDAHO

GEOTECHNICAL SECTION

Silty SAND with gravel (A-4); medium dense, slightly moist, predominantly fine-grained, roots, light brown

GRANITE; very hard, slightly fractured, dry, dark gray

Practical excavator refusal on granite at 1-1/2 feet.

S M

G R

A N

IT

E

EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 1.5'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'36.4704" (46.493464°)

LONGITUDE (DEGREES): W -115°5'27.9492" (-115.091097°)

TEST PIT 2

EXCAVATOR:

Elevation 5,101.3 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

S A

M P

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U S

C S

WEATHER:

G R

A P

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L O

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D E

P T

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9/27/2018

PROJECT: 318-176G

SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

Silty GRAVEL with sand (A-1-a); medium dense, slightly moist, predominantly fine-grained, roots, light brown

GRANITE; very hard, slightly fractured, slightly moist, gray

Practical excavator refusal on granite at 3 feet.

G M

G R

A N

IT

E

EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 3'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'36.0204" (46.493339°)

LONGITUDE (DEGREES): W -115°5'28.9968" (-115.091388°)

TEST PIT 3

EXCAVATOR:

Elevation 5,104.9 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

S A

M P

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U S

C S

WEATHER:

G R

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9/27/2018

PROJECT: 318-176G

SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

Silty SAND with gravel (A-1-b); medium dense, slightly moist, predominantly fine-grained, some roots, light brown

GRANITE; very hard, slightly to moderately fractured, light gray

Practical excavator refusal on granite at 3-1/2 feet.

S M

G R

A N

IT

E

EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 3.5'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'35.3724" (46.493159°)

LONGITUDE (DEGREES): W -115°5'29.364" (-115.09149°)

TEST PIT 4

EXCAVATOR:

Elevation 5,115.2 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

S A

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U S

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WEATHER:

G R

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PROJECT: 318-176G

SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

Silty SAND with gravel (A-1-b); occasional cobbles and boulders, loose, moist, predominantly fine-grained, brown

GRANITE; very hard, slightly fractured, slightly moist, gray

Practical excavator refusal on granite at 4-1/2 feet.

F

IL

L G

R A

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EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 4.5'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'35.2788" (46.493133°)

LONGITUDE (DEGREES): W -115°5'28.518" (-115.091255°)

TEST PIT 5

EXCAVATOR:

Elevation 5,095.0 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

S A

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WEATHER:

G R

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PROJECT: 318-176G

SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

Cobbles and boulders (talus) infilled with silty sand; medium dense, slightly moist, angular, fine-grained sand, brown (sand) to gray (cobbles and boulders)

Poorly-graded GRAVEL with silt and sand (A-1-a); medium dense, moist, fine grained (sand), angular (gravel and cobbles), brown

GRANITE; very hard, slightly fractured, slightly moist, dark gray

Practical excavator refusal on granite at 5-1/2 feet.

C O

B B

L E

S G

P -G

M G

R A

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EXCAVATION METHOD:

Cook & Sons

AFTER EXCAVATING

WHILE EXCAVATING

AT COMPLETION

NOTES

N/A

LOGGER:

COMPANY:

CAT 416C

TEST PIT LOG

WATER LEVELS

OPERATOR: 24 inch wide bucket

Sheet 1 of 1

ST

TOTAL DEPTH: 5.5'

DESCRIPTION

LATITUDE (DEGREES): N 46°29'34.728" (46.49298°)

LONGITUDE (DEGREES): W -115°5'29.49" (-115.091525°)

TEST PIT 6

EXCAVATOR:

Elevation 5,091.7 Feet BK - Bulk sample

NOTES:

9/27/2018DATE FINISHED:

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SADDLE CAMP PIT

DATE STARTED:ALLWEST TESTING & ENGINEERING,

AASHTO Soil Classification System

Unified Soil Classification System

MAJOR DIVISIONS SYMBOL TYPICAL NAMES

COARSE

GRAINED

SOILS

GRAVELS

CLEAN

GRAVELS

GW Well-Graded Gravel, Gravel-Sand Mixtures.

GP Poorly-Graded Gravel, Gravel-Sand Mixtures.

GRAVELS

WITH FINES

GM Silty Gravel, Gravel-Sand-Silt Mixtures.

GC Clayey Gravel, Gravel-Sand-Clay Mixtures.

SANDS

CLEAN

SANDS

SW Well-Graded Sand, Gravelly Sand.

SP Poorly-Graded Sand, Gravelly Sand.

SANDS

WITH FINES

SM Silty Sand, Sand-Silt Mixtures.

SC Clayey Sand, Sand-Clay Mixtures.

FINE

GRAINED

SOILS

SILTS AND CLAYS

LIQUID LIMIT

LESS THAN 50%

ML Inorganic Silt, Silty or Clayey Fine Sand.

CL

Inorganic Clay of Low to Medium Plasticity, Sandy or Silty Clay.

OL Organic Silt and Clay of Low Plasticity.

SILTS AND CLAYS

LIQUID LIMIT

GREATER THAN 50%

MH

Inorganic Silt, Elastic Silt, Micaceous Silt, Fine Sand or Silt.

CH Inorganic Clay of High Plasticity, Fat Clay.

OH Organic Clay of Medium to High Plasticity.

Highly Organic Soils PT Peat, Muck and Other Highly Organic Soils.

Appendix C

Laboratory Test Results

Clay Lumps Clay Lumps Sodium Sodium Flat and and Friable and Friable Sulfate Sulfate

Liquid Plastic Plasticity Fractured Elongated Particles Particles Sand LA Soundness Soundness Durability Durability Absoprtion Absorption Test Pit Depth Gravel Sand Silt/Clay Limit Limit Index Faces Paticles (3:1) (Fine) (Coarse) Equivalent Abrasion (Fine) (Coarse) Index Index (Fine) (Coarse)

No. (feet) (%) (%) (%) (%) (%) (%) (%) (%) (%) (%) (%) (% Loss) (% Loss) (% Loss) (Fine) (Coarse) Apparent Bulk SSD Apparent Bulk SSD (%) (%) AASHTO TP-1 ½ - 1½ 29 56 15.1 - - NP - - 0.8 0.2 35 - - - - - - - - - - - - - A-1-b TP-1 Surface - - - - - - - - - - - 27 10.8 6.4 73 80 2.735 2.666 2.691 2.751 2.608 2.660 1.0 2.0 -

TP-2 0 - 1 26 38 35.9 - - NP - - 0.6 0.7 25 - - - - - - - - - - - - - A-4

TP-3 0 - 1 43 42 14.8 - - NP - - 0.7 0.1 31 - - - - - - - - - - - - - A-1-a TP-3 1 - 3 - - - - - - - - - - - 23 8.6 2.8 78 85 2.681 2.605 2.633 2.706 2.617 2.650 1.1 1.2 -

TP-4 0 - 1 37 50 13.5 - - NP - - 0.9 0.1 36 - - - - - - - - - - - - - A-1-b TP-4 1½ - 3½ - - - - - - - - - - - 31 3.4 1.1 67 73 2.634 2.549 2.581 2.633 2.494 2.547 1.3 2.1 -

TP-5 0 - 4 38 40 22.0 - - NP - - 0.4 0.2 22 - - - - - - - - - - - - - A-1-b TP-5 Surface - - - - - - - - - - - 25 5.4 0.7 72 80 2.712 2.629 2.660 2.731 2.631 2.668 1.2 1.4 -

TP-6 0 - 3 - - - - - - - - - - - 24 3.5 0.9 74 82 2.677 2.647 2.658 2.712 2.621 2.655 0.4 1.3 - TP-6 3 - 5 70 20 10.4 - - NP 89 14 0.6 0.2 23 33 16.7 11.3 38 52 2.646 2.567 2.597 2.713 2.463 2.556 1.2 3.7 A-1-a

Results which are red, bold and italicized do not meet one or more of the below specifications.

Clay Lumps Clay Lumps Sodium Sodium and Friable and Friable Sulfate Sulfate

Liquid Plasticity Fractured Particles Particles LA Soundness Soundness Durability Durability Apparent Limit Index Faces (Fine) (Coarse) Abrasion (Coarse) (Fine) Index Index Specific Absorption (%) (%) (%) (%) (%) (% Loss) (% Loss) (% Loss) (Coarse) (Fine) Gravity (%)

25 Max. - 50 Min. 0 0 50 Max. 12 Max. 12 Max. 35 Min. 35 Min. - - 35 Max. 7 - 13 50 Min. 0 0 50 Max. 12 Max. 12 Max. 35 Min. 35 Min. - -

30 Max. - - - - - - - - - - -

- 6 Max. - - - 50 Max. 15 Max. 15 Max. - - - -

- - - - - 50 Max. - - 50 Min. - - -

- - - - - 50 Max. 12 Max. 12 Max. - - 2.40 4.0 Max.

- - - - - 50 Max. 12 Max. 12 Max. 52 Min. - 2.40 4.0 Max.

FP-14 STANDARD SPECIFICATIONS

Gabion Rock (705.01) Riprap (705.02)

Base & Subbase Aggregate (703.05) Surface Course Aggregate (703.05)

Select Granular Backfill (704.08)

Rockery Rock (705.06)

Unclassified Borrow (704.06) Select Borrow (704.07)

Material Soil Classification

SADDLE CAMP PIT

ALLWEST PROJECT NO. 318-176G

A-1, A-3, or A-2-4

Specific Gravity (Fine)

Poorly graded gravel w/ silt and sand (GP-GM)

Granite (talus)

Cobbles and boulders (granite talus)

Silty sand with gravel (SM)

Granite Silty sand with gravel (GM)

Gradation Atterberg Limits

Specific Gravity (Coarse)

TABLE C-1: SUMMARY OF LABORATORY TEST RESULTS

Granite Silty gravel with sand (GM)

Silty sand with gravel (SM)

Granite (talus) Silty sand with gravel (SM)

Soil / Rock Classification

USCS