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iii iiiiuiiiiiu iii , - , <br />~_, " The Pittsburg & Midway Coal Mining Co. ' " <br />;~, <br />P&M Coal P.O. Box 176 <br />The Edna Mine Oak Creek Co 80467 <br />September 21, 1983 <br /> <br />Ms. Sandy Emrich <br />Mined Land Reclamation Division <br />423 Centennial Building <br />1313 Sherman <br />Denver, CO 80203 <br />Dear D1s. Emrich, <br />~tN 26 1yti3 <br />MINED LAND RECLAMATION DIVISION <br />Colo. Dept of Natural Resources <br />On June 15 and 17, 1983, you examined areas at the Edna <br />Coal Mine which P$M requested bond reduction on. Your report <br />listed problem areas which P$M needed to evaluate and develop <br />stabilization plans. These areas are discussed below. <br />The slumping area on the east side of Center Ridge was <br />caused by pre-law mining activity. During the 1950's, when the <br />area was first mined, spoil material was cast over the east side <br />which created the instability. Enclosed is an aerial photo from <br />1962 cahich clearly shocas the instability existing before any <br />reclamation laws and before Center Ridge was remined in the 1970's. <br />PF,M feels there is no effective way to control slumping on such a <br />steep slope without causing greater instability and environmental <br />damage to the surrounding terrain. Since the slump is a result <br />of pre-law activity, PF,M is not liable for this condition. In <br />this case, it is better to leave the slump as is, as opposed to <br />creating a bigger disturbance trying to fix it. <br />On the east side of Center Ridge is a small draw which has <br />an intermittent gully. Parts of this drainage are very stable <br />_ with vegetation established within it. In the areas cohere the <br />gully is over nine inches deep, PF,M purposes installing silt <br />fences to retard the flow of runoff. Over time, as the fences <br />fill with silt, vegetation will reestablish itself. <br />West of the shop area are several gullies that formed when <br />runoff broke through some contour furrows. The mine will re- <br />build the broken furrows and grade topsoil into the gullies. The <br />topsoil will then be seeded with an approved seed mixture. <br />Also in the area west of the shop, is an ephemeral drainage <br />channel which you report as having a gully extending from tlce top <br />Gulf <br />ASU9SI DIARY OF GULF OIL COPORATION TELEPHONE (303) ]36-9111 <br />