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<br />GEC MINERALS, INC. <br />FLORENCE, COLORADO 81226 <br />P.O. BOX 225 <br />Mr. Pete Evans <br />Reclamation Specialist <br />Mined Land Reclamation <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />Subject: Proposed Sediment Control in Dam D Area <br />Dear Pete: <br />III IIIIIIIIIIIIIIII <br />303/784-6891 <br />August 11, 1980 <br />RECEIVED <br />AU G 1 ~? 1980 <br />MINED LAND RECLAMATION <br />Colo. Dept. of Natural Resources <br />Per your recent request, CEC is pleased to conduct a preliminary <br />Sediment Control Plan in the Dam D area. This plan is subject to <br />your approval and or revision at our meeting tomorrow, August 12, <br />1980. <br />According to the attached copies, which I reproduced from the <br />approved Sediment Control ifap (Application for Ammendment to Mining <br />and Reclamation Permit ;)77-48) there was an existing underground <br />working drift (size: 4' x 4', Peacock Mine(?) - colored in yelLow). <br />This drift extends approximately 300' long and 2' to 20' below the <br />surface. Also, this coal seam happens to be the same coal seam that <br />Dorchester Colomine Coal is mining and will be one of the same seams <br />that GEC will mine. <br />.lAs we discussed before, in order to seperate the fresh water from the <br />~: disturbed water, the most reasonable approach to handle Dam D area <br />;~;~ ill be to build up a small bank at the bottom of the existing un- <br />' named stream. The size of the bank will be approximately 70' long, <br />r:~8' high, and approximately 10' wide. In addition to this bank, a 4' <br />i.; wide trench has to be cut, starting Erom the North end of this bank <br />~': northward 250' to connect with [he existing Magpie Creek Diversion <br />'. Channel which happens to be the West end of Dam D. The trench could be <br />20' deep. (The proposed bank is marked in solid red and the proposed <br />trench will be marked in red colored dashes.) <br />Approximately the only place that should and will be sealed off will <br />be the intersection between tl~e proposed trench and the old under- <br />ground drift, which should be approximately 15' below the surface. <br />This entire plan will cost CEC a lot of money and we will have to <br />contribute a lot of time which we have not asked credit for. <br />