2008-12-23_REPORT - M1977004

• Permit No: M1977004
• IBM Index Class Name: REPORT
• Doc Date: 12/23/2008
• Doc Name: 2008 Annual Geotechnical Report
• From: Homestake
• To: DRMS
• Email Name: RCO
• Media Type: D
• Archive: No

Homestake
2008 Geotechnical Observations
Pitch Reclamation Project Indian Creek and Tie Camp Creek Waste Rock Dumps
Table 1: Pitch Project - Depth to Water in Waste Rock Dump Piezometers [feet below around surface at sonar (hnc)t
DATE 10630 10600 10525. 40 10370 10360 1b300 TC10375 `
Collar EIeV. 10631.5 10603.8 11053.6. 10440.0 ` 10380.52 10373.4 ;;. 10299.5' 10373.0

1/16/08
202.4
252.6
229.3
Destroyed Not
Repaired"
226.5
190.2
171.6
2/22/08 202.6 252.9 229.3 227.3 190.3 171.7
3/24/08 202.7 252.9 229.3 227.9 190.6 172.0
4/18/08 202.9 253.0 229.4 228.2 190.9 172.2'
5/19/08 201.9 250.6 221.7 219.6 175.6 159.9
6/25/08 201.9 245.3 221.6 220.0 182.1 168.8
7/21/08 202.5 250.7 225.7 220.6 181.8 169.8
8/18/08 202.2 251.9 226.8 220.9 181.3 170.1
9/11/08 202.2 252.5 227.9 221.0 181.3 170.4
10/17/08 202.1 252.4 228.3 222.7 181.1 170.5
11/14/08 202.1 252.1 228.5 223.1 180.7 170.6
12/08/08 201.9 251.9 228.6 224.3 180.7 170.3
Average depth
2008Maximum
Differential_ 202.3
-
1.0 251.6

7.7 227.2

7.8

N/A

N/A 223.5

8.6 183.9

15.3 169.8

12.3
Homestake Pitch Reclamation Project Page 4
2008 Annual Geotechnical Report December 15, 2008
M-1977-004HR 2008AnnualGeotechnicalReportText_Final.doc