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C c~rpRUs <br />Denver, CO 80203 <br />~ Yampa Valley <br />Kent Gorham <br />Reclamation Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />June 3, 1993 <br />Dear Mr. Gorham; <br />iii iiiuiiiiii-i iii <br />Cyprus Yampa Valley Coal t;orµna,,,,.. <br />29587 Routt County Road #27 <br />Oak Creek, Colorado 80467 <br />303-8793800 <br />RF(;EIVED <br />JUN 71993 <br />Division of Mineial~ ~ ui'o{~'9Y <br />Re: Plan for De-waterina.of Pond A, NOV C-93-080: Permit C-81-071, <br />Colorado Yamoa Coal Companv <br />As discussed with yourself and Don Homer of CDOH, CYCC proposes the <br />use of a pump, which will either be routed into the top of the <br />riser, or will be run down the face of the embankment to the <br />discharge point, to accomplish the necessary draw-down of the pond. <br />In addition to the pump, CYCC may also utilize a limited number of <br />siphon tubes over the embankment to supplement the de-watering. <br />These siphon tubes would also dischrge at the mouth of the <br />discharge culvert. Due to the routing of the supplemental <br />discharge, CYVCC would need to temporarily move downstream a short <br />distance from the established compliance point (at the end of the <br />discharge culvert) to monitor all discharge flow. <br />Weekly samples will be collected per our normal monitoring <br />requirements, and daily visual assessments are planned during the <br />supplemental de-watering process. CYCC does not anticipate any <br />problems with meeting the applicable water quality standards during <br />this process. <br />Should you have any questions or comments, please contact me at <br />your convenience. <br />Sincerely, <br />Marcus A. Middleton <br />Environmental Specialist <br />