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<br />WREnCE G. WFFITE P.E. <br />1650 M. STREET PENROSE. COLORADO 81240 __303-3 72-C=16 ~ <br />~~ : ,: <br />r~ <br />May 13, 1986 <br />Mr. Chris Reed, President ~Qr 1 s 1986 <br />Twin Pines Investment Limited Partnership <br />Falcon Ener ~;'"~[1 ~ "•'"• ' <br />gy, Inc., General Partner ~:,, ~„j;~Y;; , , <br />P. 0. Box 2059 1:'Y~,?. I)NK7i, t1i ~i:~ :•::~, w'r9'; •, <br />Canon City, CO 81212 - <br />SUBJECT: TWIN PINES N0. 2 MINE: INSPECTION OF NORTH SPOIL AREA <br />Dear Mr. Reed: <br />As a Registered Professional Engineer in the State of Colorado, I <br />have inspected the placement of fill in the North Spoil Area in accordance <br />with Rule No. 4.09.1 (11) of the Rules and Regulations of the Land Reclam- <br />ation Division. Inspections were made during periodic visits to the site. <br />During the quarter, the site was visited at least twice monthly. <br />As of April 15, a 2 foot lift of spoil has been placed over the filter <br />gravel with the second lift covering approximately 607, of the area. Several <br />loads have been dumped which have not been spread. It is estimated that <br />800 cy ' of spoil have been placed in the spoil area. At this time, the spoil <br />level is still a minimum of 4 feet below the top of the toe dike. (Refer to <br />Drawing No. TP-3 and appropriate cross sections.) Construction of the Spoil <br />Pile was discussed with mine personnel where it was noted that the spoil <br />should be graded to drain to the exist~ng high wall. <br />The bulk of material being placed in the spoil area is from the slate <br />formation which overlies the coal seam. Mine operators have strived to <br />segregate the slate material from the coal. In general, the waste has been <br />generated after the coal is removed from the cut. Waste material conveyed <br />from the mine is segregated by rotating the stacking conveyor to create a <br />separate pile. When sufficient waste is generated, it is loaded into an <br />8-ton truck and placed in piles on the waste area. Periodically, the piles <br />are knocked down and uniformly spread with a front end loader, resulting in <br />a horizontal lift of 2 fPe.t or less. Compaction is achieved by the front- <br />end loader and the truck running over the previously placed spoil. <br />The procedure being used to construct the Spoil Pile is in accordance <br />with good construction practices and exceeds the requirements of Section <br />2.05.10 of the permit application. Conclusions reached are based on visual <br />observation of the removal, handling, placement and condition of the waste <br />in the pile. <br />Ver my Yours, G _ /J <br />~~i e , /~,//~. <br />0. ?964 <br />lw/lc <br />