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r • -III IIIIIIIIIIIIIIII STATE OFCOLORADO RICH ARDD LAMM Governor 999 DEPARTMENT OF NATURAL RESOURCES D. Monte Pescoe, Executive Director MINED LAND RECLAMATION 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 David C. Shelton Director M E M O R A N D U M TO: Mike Savage FROM: Richard Domingue~ v Date: November 3, 1981 RE: Sediment Con trot at Bourg Mine, Walden Coal Co. Our File No. C 021-81 Mike: I cannot fully review the information submitted by Walden Coal Company at this time. There is a figure referred to for drainage area determination which I have been unable to locate. Most of the response has been reviewed. I am unsure as to whether the haul road culverts will be reviewed by Bob so I have identified those items which need to be submitted by Walden Coal Company. 1) Drainage Area Map There is reference to a map, plate 17a, which I have not been able to Locate. WCC should submit a copy of this map to verify drainage areas contributing to each of the ponds. 2) Regarding WCC's Request for Finding of No Significant Impact for Existing Roadway The existing roadway which WCC uses as a haul road does not meet the haul road requirements of Sec. 4.03.1. The have requested that the Division make the finding of insignificant impact as allowed under Sec. 4.03.1 (4) (e) (vi) and thereby allow WCC to leave the road as is. Rs Bob Liddle has reviewed the road section, his input on this finding should also be obtained. It is my opinion that based on regional precipitation and runoff characteristics that the improvement of this road not warranted and that we should grant the request. At the same time, the findings document should include the provision that should significant impact either occur or appear imminent, the Division may require that remedial action be taken within 30 days. This action may include, but is not limited to, culvert installation, roadside ditching, regrading or surfacing, and embankment protection.