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III IIIIIIIIIIIII III <br />999 <br />~ ~ tr~~. <br />ENGINEERING ANDENVIRONMENTAL DIVISION <br />]]I LINCOLNAVE <br />P O. BO%1]]9E1 <br />STEAMBOAT SPRINGS. CO B0~1] <br />March 23, 1982 <br />~~;~~~~ <br />Ms. Lynn Lewis <br />Project Coordinator ~9~2 <br />Bureau of Land Management NIf~.R L'z <br />P.O. Box 1269 <br />Montrose, Colorado 81402 MINED LAND f1tCLAPAATION <br />Co!~. Dept. ~± P!?b~r?I 0cso:rces <br />Re: Bear Coal Company Cline No. 3 <br />Dear Ms. Lewis: <br />In response to your review of the Bear Coal Company Mining & <br />Reclamation Plan application, we have prepared several drawings which <br />show the design of an embankment that will be constructed around the <br />Bear Coal Company Mine No. 3 facilities. The purpose of the <br />embankment is to prevent flood waters from the North Fork of the <br />Gunnison River from entering the facilities area of the proposed mine. <br />In addition, this embankment will also prevent the sediment contained <br />in the sediment pond from contaminating the IJorth Fork of the Gunnison <br />River during flood stages. <br />The attached maps show in profile, cross section and plan the location <br />of the dike embankment in relationship with Diversion Ditches C and D, <br />the sediment pond, the relative elevations of the 100-year flood of <br />the North Fork of the Gunnison River, expected flows of the diversion <br />ditches and existing ground elevations. <br />The general criteria which has been utilized for the dike embankment <br />consists of the following: <br />0 100-year flood elevation for the tJorth Fork of the Gunnison <br />River <br />0 1.0 foot freeboard <br />o Rip rap all slopes subject to flood waters <br />o Embankment compacted to 90% of Proctor dry density <br />o Locate dike embankment between Bear Coal Company surface <br />water control structures and North Fork of Gunnison River <br />The Bear Coal Company is currently finalizing the required permit <br />applications in order for mining to begin. The anticipated schedule <br />of permit approval is for mid to late April, 1982. 4lithout approval <br />