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Zoos <br />PTTCH RECLAMATION PROJECT <br />GEOTECHNICAL OBSERVATION -Indian Creek and Tie Camp Waste Rock Dumps <br />Indian Creek Waste Rock Dumy <br />A. "10800" Level <br />Site Description: Identical to that of past reports for 1996 through 2000. <br />2001 Observations: the 2001 observations are similar to those reported for this area during <br />the past 5 years. There was no evidence of settling or slumping of the dump material in <br />2001. Drainage channels aze functioning as designed. <br />B. "10780 -10650" Level <br />Site Description: Identical to that ofpast reports for 1996 through 2000. <br />2001 Observations: The 2001 observations aze similar to past observations. <br />C. "10650 -10600" Level <br />Site Description: identical to that of the past reports for 1996 through 2000. <br />(discussion expanded in response to comment #3) <br />2001 Observations: The 2001 observations aze similaz to past observations except that a <br />gravel obstruction was removed from Piezometer IC10600 and data can now be obtained <br />from this point. The total depth of Piezometer IC10600 is approximately 253 feet below <br />surface grade (bsg). In 1994, it was thought that slight movement at the 243-ft level had <br />made it impassible with the solonist. Because this piezometer is an azea where subsidence <br />was observed prior to the placement of dump material, it was not interpreted as critical <br />movement. In 2000, the solonist was unable to pass the 165 ft level. Homestake then <br />conducted an assessment to determine if there was movement at the 165-ft level or blockage <br />in the solid PVC casing. A small amount of debris was found to be the source of the block <br />at both the 165-ft level and 243-ft level. Both have been removed and the solonist can now <br />pass to the total depth of the piezometer and accurately measure water levels. The source of <br />the material is still not known. Because the blockage occurred at two locations in the <br />piezometer, the source was likely a small breach in the up-gradient solid PVC casing. <br />Homestake will continue to monitor for, and relieve, any future blocks. <br />2001(Permit774t~2)_final.doc Page I <br />