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STATL JF COLORADO <br /> MINED LAND RECLAMATION DIVISION of Cosa <br /> Department of Natural Resources <br /> 1313 Sherman St., Room 215 <br /> Denver,CO 80203 + <br /> 303 866-3567 *1876` <br /> FAX 303 832-8106 <br /> Roy Romer, <br /> Governor <br /> Fred R.Banta, <br /> Division Director <br /> February 10, 1992 <br /> Don R. May <br /> 735 E 7th Ave. <br /> Durango, CO 81301 <br /> RE: Technical Revision 04 - Mine Drainage - C-81-035 <br /> Dear Mr. May: <br /> The Division has completed the adequacy review on Technical Revision 04 and <br /> has only one concern that needs to be addressed. The new channel to be cut <br /> for the East Drainage Diversion Ditch, reach 1 , has a slope of 6 percent. <br /> When running at expected peak flow, the channel is likely to erode if not <br /> protected in some manner. Please send the Division your recommendations and <br /> calculations on resolving this last issue. <br /> If you have any questions, please give me a call . <br /> Sincerely, <br /> C-aAA <br /> Harry B. Ranney <br /> Reclamation Specialis7 <br /> HBR/scg <br /> cc: Brad Gosche <br /> Caryl Helmin <br /> 1226F <br />