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OF /C~O~O <br />Fc%t~;~_SFtsv'~9O <br />ti r O~ <br />•f <br />'ra7s. <br />Richard D. Lamm <br />Governor <br /> <br /> <br />DEPARTMENT OF NATURAL RESOURCES <br />David H. Getches. Executive Director <br />MINED LAND RECLAMATION D11 <br />DAVID C. SHELTO N, Director <br />DATE: July 14, 1986 <br />T0: Dan Mathews <br />FROM: Cathy Begej <br />RE: ADDITIONAL COPICERNS FOR LI7TLE MIDDLE CREEK PERMI7 REVISION <br />Rule 2.05.6(3)(iv) PHC <br />Please develop a worst case scenario of spoils aquifer discharge <br />through the french drains below the excess overburden stockpil?. <br />Provide documentation of assumptions and raw calculations used to <br />derive discharge values. <br />Rule 4.05.5(2)(d) Sediment Control Measures <br />Please incorporate ditches draining the french drains from the excess <br />overburden stockpile into the drainage plan. <br />Rule 4.03.1(4)(e) <br />/dlm <br />2221E <br />1. Please provide calculations showing loading on the culverts located <br />along the haul roads per Rule 4,03,1(4)(e)(ii), <br />2. Please develop a figure showing a trash rack design for the <br />upstream side of culverts under fills and for all culverts routing <br />water from ephemeral drainages per Rule 4.03.1(4)(3)(iii). <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel, (303) 866-3567 <br />