2016-12-19_REVISION - M1980244 ‎(2)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 12/19/2016
• Doc Name: Responses to DRMS ECOSA Stability Review Comments
• From: Newmont / CC&V
• To: DRMS
• Type & Sequence: AM11
• Email Name: TC1
• Email Name: AME
• Email Name: ERR
• Media Type: D
• Archive: No

Knight Piesold Geotechnical Lab.
DIRECT SHEAR TEST 8/19/2016
Date:8/3/16
Client:Newfields
Project:East Cresson Overburden Storage Area (ECOSA)
Project No.:DV108-305/05
Location:Overburden (Bulk Sample)
Description:
Remarks:Failure chosen at 10% strain. Test was inundated. Gap = 0.4. Particles larger that 3/4" were
removed and replaced with finer grasvel prior to test. Area correction applied per client.
Type of Sample:Tamped with nominal effort
Assumed Specific Gravity=2.7 LL= PL= PI=
Parameters for Specimen No. 1
Specimen Parameter Initial Consolidated Final
Moisture content: Moist soil+tare, gms.8161.800 9492.100
Moisture content: Dry soil+tare, gms.8000.000 8000.000
Moisture content: Tare, gms. 0.000 0.000
Moisture, %2.0 18.7 18.7
Moist specimen weight, gms.8161.8
Side Length, in. 8.00 8.00
Area, in.²64.00 64.00
Height, in. 4.80 4.25
Net decrease in height, in. 0.55
Wet density, pcf 101.2 133.0
Dry density, pcf 99.2 112.1
Void ratio 0.6990 0.5042
Saturation, %7.8 99.9
Test Readings for Specimen No. 1
Normal stress = 20000 psf
Strain rate, in./min. = 0.01
Strength calculations use strain adjusted areas
Fail. Stress = 18205 psf at reading no. 49
No.
Horizontal
Def. Dial
in.
Load
Dial
Load
lbs.
Strain
%
Shear
Stress
psf
0 0.0000 0.000 0.0 0.0 0
1 0.0094 451.000 451.0 0.1 1016
2 0.0160 776.000 776.0 0.2 1749
3 0.0237 1093.000 1093.0 0.3 2467
4 0.0314 1324.000 1324.0 0.4 2991
5 0.0398 1520.000 1520.0 0.5 3437
6 0.0464 1657.000 1657.0 0.6 3750
7 0.0552 1801.000 1801.0 0.7 4080
8 0.0613 1914.000 1914.0 0.8 4340
9 0.0701 2046.000 2046.0 0.9 4644
10 0.0787 2164.000 2164.0 1.0 4917
11 0.0961 2382.000 2382.0 1.2 5425
12 0.1116 2575.000 2575.0 1.4 5876
13 0.1272 2758.000 2758.0 1.6 6306