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REP20768
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REP20768
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Entry Properties
Last modified
8/24/2016 11:49:17 PM
Creation date
11/27/2007 2:58:10 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977004
IBM Index Class Name
Report
Doc Date
4/23/2002
Doc Name
Geotechnical Report
From
Homestake Mining Company
To
DMG
Permit Index Doc Type
Stability Report
Media Type
D
Archive
No
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G. "10300 -10100" Level <br />Site Description: The Indian Creek Waste Rock Dump was regraded in 1994 <br />following procedures approved in the Febniary, 1994 Technical Revision. Duting <br />1995 several minor, localized azeas of slope instability were noted, corrected, and <br />reported in the 1995 Annual Geotechnical Report. Visual observations indicate <br />that the repairs performed in 1995 are successful and no new areas of surficial <br />instability (slips) were observed from 1996 through 2001. <br />2001 Observations: the 2001 observations aze similaz to those reported for past <br />years. Piezometer IC10300 is located in this azea. Water levels have stabilized at <br />approximately 189.4 feet bgs during 2001 with a seasonal fluctuation of 8.6 feet. <br />De the to Water Measured in Piezometers on Waste Rock Dum s <br />Date of <br />Measurement Piezometer Elevations (feet amsl) <br />Indian Creek Waste Rock Dump Piezometers <br />Tie Cam Area Piezometer <br /> IC10630 IC10600 IC10525 [C10440 IC10370 IC10360 IC10300 TC10375 <br />1/17/2001 203.2 229.8 Destro ed 186.9 230.9 191.3 172.1 <br />2/15/2001 203.4 229.8 187.1 231.0 191.3 172.2 <br />3/9/2001 203.4 229.8 187.2 232.1 191.3 172.3 <br />4/2/2001 203.1 229.8 187.1 232.4 190.4 172.3 <br />5/16/2001 203.1 226.6 186.3 220.6 182.7 169.9 <br />6/15/2001 203.1 226.9 186.3 220.8 186.4 170.5 <br />7/18/2001 203.1 227.3 186.4 221.5 187.7 170.9 <br />8/21/2001 203.1 228.2 186.4 224.3 190.2 171.2 <br />9/i5/2001 203.1 229.0 186.4 227.1 190.8 171.8 <br />10/26/2001 203.1 253.0 229.6 186.4 228.2 190.8 172.2 <br />11/21/2001 203.1 252.9 229.7 186.5 229.1 190.9 172.2 <br />2001 <br />Maximum <br />Differential <br /> <br />0.3 <br /> <br />0.1 <br /> <br />3.2 <br /> <br />N/A <br /> <br />0.9 <br /> <br />11.8 <br /> <br />8.6 <br /> <br />2.4 <br />Notes: <br />• Piemmeter [C 10440 was destroyed during regrading efforts in September 1996. IC10525 covers this area of the Indian <br />Crcek Was[e Rock Dump. <br />• Depths recorded in feet below ground surface (bgs) <br />PAGE 3 <br />
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