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December 29, 1994 - quarterly inspection of the West Pit <br />Excess Spoil Fill <br />During the quarter sorted rock was placed in the rock <br />underdrain starting at Station 9+00 and by December 2, 1994 was <br />completed to station 20+50. The rock placement began on August 10, <br />1994 and is now complete except the last 200 feet. Rocks from 1 <br />feet in diameter to 6 feet in diameter were sorted from the <br />locations around the minesite and hauled or pushed into the rock <br />drain system. (see photographs 42 through 45 for this quarter) <br />During the quarter one area of instability was discovered. On <br />September 27, 1994 a small slide was discovered near stations 1150 <br />to 2+50. This slide area was above the rock underdrain in <br />elevation. The slide was excavated and the water source <br />discovered. A drain channel 10 feet in width was excavated and <br />filled with sorted rock and layered with 2 feet of two inch minus <br />layered rock. The excavation and construction of the rock drain <br />was complete on October 5, 1994. The area was then backfilled and <br />sloped into final Excess Spoil Fill Contours. (see photographs 47 <br />through 54) <br />On November 10, 1994 the construction of the surface rock <br />drain that runs along the north east edge of the Excess Spoil Fill <br />was begun. The drainage channel was first excavated to a depth of <br />over 10 feet with a top width of 40 feet. Once the excavation was <br />final the drain was filled approximately half full of sorted rock. <br />The drain was started on the 6859 elevation (toe elevation) and by <br />the end of the quarter had advanced to the 7025 elevation. (see <br />photographs 55 through 61) <br />During the quarter the 6859 to 6950 elevation and the 6950 to <br />7050 elevation 3:1 slopes were established in final grade. The two <br />percent ditch that runs across the face of the 3:1 fill was also <br />final graded. The Excess Fill Area was dumped in approximately 50 <br />foot lifts to ensure adequate compaction and rock sorting. (see <br />photographs 62 through 68) <br />Attached to this report are my certification that all <br />construction requirements have been met thus far in constructing <br />the West Pit Excess Fill, and the color photographs as required by <br />the CDMG regulations concerning offsite Excess Spoil Fills. <br />~f <br />Stephen R. Hinkeme er <br />Sr. Mining Engineer <br />c.c. R. W. Strid <br />central files <br />