2006-03-27_REVISION - M2000158 - Laserfiche WebLink

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PLATTE SAND & GRATjEL LLC `~ ~~~~ P.O. BOX 712 LITTLETON, CO 80160 (303) 238-1130 March 27, 2006 Msr. Erica Crosby RECEIVED Division of Minerals and Geology MAR l ~~Q6 1313 Sherman St, Suite 215 2 Denver, CO 80203 O~~~s~un~{ry~~,eralsandGealogy Dear Mrs. Crosby; RE: S&H Mine - Technical Revision ~~~ M.L.R.B. Permit # 2000-158 ~/ This Technical Revision is to make a minor change in the direction of mining in the Sharkey's Lake area. We are in the process of completing the mining in the area west of the Plant Site. We need a new area to mine until the slurry wall is completed and certified. we propose moving into southern end of the Sharkey's Lake reservoir area during the slurry wall constrution to keep our plant operating. No dewatering will take place within the reservoir or mine area until the slurry wall is completed and the QAQC is suppplied to the Division per our 2004 amendment. In the Technical Revision of September 2005 we changed the mining direction in this lake area from south to north and forgot that there would be a problem during the winter months when the eagles are roosting along the river. Mining is restricted in mile buffer zoned during November to March on the west and north sides of the Sharkey's Lake area. So modifying the mining direc- tions will serve two purposes, it will provide an area to mine outside the eagle buffer zone during winter and allow us to wet mine gravel during construction of the liner without having to open a new area in one of the other lake areas. Dewaterina will not begin on this site until slurry wall is complete isolating it from the surrounding aquifer. The $1,123,000 bond is adequate to cover the cost for opening this new area as it allows having 69.0 acres of disturbance at this time. The amount of total distur- bance existing and in the new anre will be less that 69.0 acres.