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• • III IIIIIIIIIIIIIIII <br />STATE OF COLORADO <br />Roy Romer, Govei <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />DATE: November 23, 1987 <br />T0: David Berry c 2~ <br />FROM: Dan Mathews ~,~r / I <br />RE: Mine 3 Erosion Control Ditch; File No. C-84-062 <br />I discussed the erosion control ditches located at the southern end of the <br />Mine 3 Pit reclaimed area with Rick Mills on November 20, 1987. I recommended <br />that the upper segment of the newly constructed ditch be removed because of <br />potential erosion at the switch back. <br />I also indicated that CYCC should ensure that the older diversion ditch to the <br />north of the recent reclamation connects with the newly constructed ditch <br />which will remain in place, and that necessary maintenance should be done in <br />some locations along the ditch to provide for appropriate grade and capacity. <br />A trapezoidal ditch 5 feet wide by 1 foot deep should be sufficient to convey <br />runoff from the reclaimed slope into Ditch NoN-3. <br />/bdc <br />3582E <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />