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Homestake Pitch Reclamation Project <br />2011 Geotechnical Observations <br />Indian Creek and Tie Camp Creek Waste Rock Dumps <br />1. Indian Creek Waste Rock Dump <br />a) "10800" Level <br />Site Description: Identical to that of past reports for 1996 through 2011. <br />2011 Observations: The 2011 observations are similar to those reported for this area <br />during the past fifteen years. Visual inspection of the area has revealed no evidence of <br />settling or slumping of the rock dump material in 2011. Drainage channels are <br />functioning as designed. <br />b) "10780 - 10650" Level <br />Site Description: Identical to that of past reports for 1996 through 2011. <br />2011 Observations: The 2011 observations are similar to past observations. Visual <br />inspection of the area has revealed no evidence of settling or slumping of the dump <br />material in 2011. Drainage channels are functioning as designed. <br />c) "10650 - 10600" Level <br />Site Description: Identical to that of past reports for 1996 through 2011. <br />2011 Observations: Unlike 2010 when no water was detected in Piezometer IC10630, <br />the 2011 water elevation in this piezometer rose by approximately 3 feet in September <br />and October following late summer rain storms. This piezometer has never shown more <br />than a foot of water following snow melt and it normally dries up by mid - summer. <br />However, this rise is very small in relation to the overall depth of the piezometer. <br />As noted in previous reports, in October 2001, an obstruction was removed from <br />Piezometer IC10600, allowing it to be used once again for the collection of water level <br />data. In 2010, a rise of 6.84 feet of water was recorded, which was slightly less than the <br />rise in 2009 and 2008. In 2011, the water level rose by 12.5 feet in May /June as a result <br />of a very heavy snow melt. The water level then dropped back to its normal range by the <br />end of summer as it has in the past. This condition is similar to other piezometers in the <br />Indian Creek dump, and is deemed as a normal and acceptable seasonal variation. The <br />water level increases in 2005 through 2011 were a result of heavy snow pack and wet <br />spring conditions. <br />d) "10725 - 10525" Level <br />Site Description: Identical to that of past reports for 1996 through 2010. The minor <br />overlap between this level and other bench designations reflects the original bench <br />configuration. <br />2011 Observations: Piezometers IC10600 and IC10525 bound this area. In early May <br />through June, 2011, the water level in Piezometer IC10525 increased by 11.0 feet and, <br />similar to Piezometer IC10600, it fell back to normal levels in late- Summer. This <br />behavior is very similar to that of past reports from 1996 through 2010. In 2011, the <br />