32_WY.PFH.4-1(4).Beartooth_Highway.Tech_Memo.Material_Source.2004.pdf

To: Bert McCauley, Project Manager, CFLHD

From: Matt DeMarco, Geotechnical Engineer, CFLHD

Subject: Compilation of Material Source Testing for the Beartooth Highway Project, WY FS 4-1(4)

The CFLHD Geotechnical Group has recently conducted additional material source testing in support of planned FY05 construction on the WY FS 4-1(4) Beartooth Highway segment, including several substantial rock cuts, a sizeable glacial moraine, and the Ghost Creek material source. This Technical Memorandum presents a compilation of all known material source testing conducted to date at these locations in order to scope the potential for aggregate availability on the project. This compilation in no way implies certification of the sources tested

– the Contractor is responsible for determining the ultimate suitability of the sources for the intended purpose(s), per FP-03 Section 105.02. References providing specific sampling location maps, descriptions of site conditions, and sample testing details are provided for each data set at the end of this memorandum (as available).

Table 1. CFLHD 2004 Ghost Creek material source investigation.1

Sample No. 04-893-AGG 04-894-AGG 04-895-AGG 04-896-AGG

Sample Location

TP 16

North Pit

Upper Bench

TP 17

North Pit

Lower Bench

TP 18

South Pit

Lower Bench

TP 19

South Pit

Upper Bench Gradation (% passing)

75 mm 86 95 84 86 #4 48 64 58 52

#200 14.0 5.4 7.7 6.7 Liquid Limit NV NV NV NV Plasticity Index NP NP NP NP Soil Class. AASHTO A-1-b(0) A-1-b(0) A-1-b(0) A-1-a(0)

ASTM GM SP-SM SP-SM SW-SM

LA Abrasion – Grading A, % loss 37 32 34 30 Sodium Sulfate Soundness, % loss 1 2 2 1 Coarse Agg. Durability Index 76 82 82 82 Fine Agg. Durability Index 48 67 64 47 Coarse Aggregate

App. Specific Gravity 2.71 2.70 2.69 2.71 Bulk Specific Gravity 2.64 2.63 2.63 2.65 Absorption, % 1.0 0.8 1.0 0.9

Fine Aggregate

App. Specific Gravity 2.67 2.67 2.68 2.69 Bulk Specific Gravity 2.50 2.59 2.59 2.62 Absorption, % 2.5 1.2 1.3 1.1

Micro-Deval, % loss 12.1 - - 12.1

1 Copies of formal test submittals available from CFLHD Geotechnical Group. Description of sampling methods and test pit logs provided in Kleinfelder, 2004.

Technical Memorandum

Date: November 22, 2004

Table 2. CFLHD 1999 Ghost Creek material source investigation.2

Sample No. 99-846-

AGG

99-847-

AGG

99-848-

AGG

99-849-

AGG

99-850-

AGG

99-851-

AGG

99-852-

AGG

99-853-

AGG

99-854-

AGG

99-855-

AGG

99-956-

AGG

Sample Location TP 7 TP 8 TP 10 TP 11 TP 12 TP 13 TP 14 TP 18 TP 20 TP 21 Mixed Sample

Gradation (% pass.)

75 mm 95 100 100 81 95 89 91 85 80 91 90 #4 58 49 51 40 58 40 40 36 46 41 45

#200 7.7 4.1 12.3 4.7 6.4 3.2 3.0 2.6 6.8 5.0 4.8 Liquid Limit NV NV 22 NV NV NV NV NV NV NV NV Plasticity Index NP NP NP NP NP NP NP NP NP NP NP Soil Class.

AASHTO A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0) A-1-a(0)

ASTM SW-SM GP GM GP-GM SW-SM GP GP GP SP-SM GP-GM GW-GC

Sodium Sulfate Soundness, % loss

- - - - - - - - - - 2%

2 Investigation details provided in CFLHD, 1999.

Table 3. CFLHD 1999, 2003, and 2004 Island Lake Moraine material source investigation, approximate Station 46+800.3

Sample No. 99-844-AGG 99-845-AGG 03-550-551-AGG 04-898-AGG 04-899-AGG

Sample Location TP 1 TP 2 Mixed Grab Sample TP 6 TP 8

Gradation (% passing)

75 mm 93 90 100 72 97 #4 61 53 58 19 76

#200 16.0 16.3 13.0 5.5 26.0 Liquid Limit NV NV NV NV NV Plasticity Index NP NP NP NP NP Soil Class. AASHTO A-1-b(0) A-1-b(0) A-1-b(0) A-1-a(0) A-2-4(0)

ASTM SM SM SM GW-GM SM

LA Abrasion – Grading A, % loss - - 44 85 41 Sodium Sulfate Soundness, % loss - - 3 73 2 Coarse Agg. Durability Index - - 71 - - Fine Agg. Durability Index - - - 15 51 Coarse Aggregate

App. Specific Gravity - - - 2.72 - Bulk Specific Gravity - - - 2.31 - Absorption, % - - - 6.6 -

Fine Aggregate

App. Specific Gravity - - 2.66 2.69 2.67 Bulk Specific Gravity - - 2.56 2.48 2.52 Absorption, % - - 1.4 3.2 2.2

Compaction Optimum Moisture, % - - 6 - - Max. Dry Density, pcf - - 136 - -

Visual Fractured Faces, % - - 80 - - Sand Equivalent - - 29 - - Min. Resistivity, ohm-cm - - 12,600 - -pH - - 6.5 - - Sulfates, ppm - - <10 - - Chlorides, ppm - - 2 -

3 Copies of formal test submittals available from CFLHD Geotechnical Group. Description of sampling methods and test pit logs are given in Kleinfelder, 2004, and CFLHD, 1999, for tests conducted in those years.

Table 4. CFLHD 2003 and 2004 rock cut sample testing.4

Sample No. 03-548-549-AGG 04-897-AGG 04-900-AGG 04-901-AGG

Sample Location Frozen Lake 53+600

Beartooth Ravine 42+020

Rock Cut 49+690

Rock Cut 49+820

Gradation (% passing)

75 mm 85 - - - #4 9 - - -

#200 0.8 - - - Liquid Limit NV - - - Plasticity Index NP - - - Soil Classification

AASHTO A-1-a(0) - - -

ASTM GW - - -

LA Abrasion – Grading A, % loss 49 42 60 41 Sodium Sulfate Soundness, % loss 1 2 5 1 Coarse Agg. Durability Index 85 90 87 90 Coarse Aggregate

App. Specific Gravity - 2.65 2.64 2.66 Bulk Specific Gravity - 2.60 2.58 2.62 Absorption, % - 0.7 1.0 0.6

Fine Aggregate

App. Specific Gravity 2.65 - - - Bulk Specific Gravity 2.58 - - - Absorption, % 1.1 - - -

Visual Fractured Faces, % 100 - - - Sand Equivalent 75 - - - Micro-Deval, % loss - 10.5 21.4 - Min. Resistivity, ohm-cm 11,930 - - -

PH 6.6 - - -

Sulfates, ppm 10 - - - Chlorides, ppm 9 - - -

4 Copies of formal test submittals available from CFLHD Geotechnical Group. Description of sampling methods and test pit logs are given in Kleinfelder, 2004, for tests conducted in 2004.

While it appears that suitable materials exist within the project and/or at the Ghost Creek material source for roadway, drainage, retaining wall, and paving aggregates, the Contractor should evaluate each source for quality and quantity per given application. Consideration should also be given to the following points:

• The gradations given in the tables above are not reflective of boulder and cobble contents within the Ghost Creek and Island Lake Moraine material sources. In some cases, bulk samples were crushed to acquire a suitable amount of sample for testing. Refer to the references for more details on sample preparation.

• Although LA Abrasion values are below specification for paving aggregate for the rock cut materials, it should be noted that sampling was conducted within the weathered, blast damaged talus on existing cuts. Higher quality material may be present within the unweathered rock mass. Rock coring along the project generally encountered high RQD values (rock quality designation index) and relatively high unconfined compressive strengths for the granitic rock present in the cuts.

• Although corrosive property testing was limited for the material sources, prior testing of both rock and soil units along the entire (4) segment indicated corrosive conditions are not present.

The above-cited references are available from CFLHD and include:

FHWA (Folkman, W.), 1999, “Wyoming Beartooth Highway, Materials Source Investigation”, CFLHD Geotechnical Report 99-14, Technical Services Branch, CFLHD-FHWA, Denver, CO, Sept. 1999, 6 pp. (plus appendices).

Kleinfelder, Inc., 2004, “Final report – Geotechnical Investigation Report, Beartooth Highway

Project, Shoshone National Forest, Park County, WY”, FHWA Contract Report DTFH68-04-T-00015, Kleinfelder, Inc., Colorado Springs, CO, Nov. 5, 2004, 18 pp.

(plus appendices).

If we can be of any further assistance in this matter, please don’t hesitate to contact me directly at (720) 963-3520.

______________________________________________ Date_________________ Matthew J. DeMarco Lead Geotechnical Engineer, CFLHD