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III IIIIIIIIIIIIIIII STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1317 Sherman 51.. Room 275 Dem~er, CO 80203 Phone:l303)A66-i56i FAX X30 31 8 3 2-81 06 FILE ,~: OPERATOR: MINE NAME: REC SPEC: DATE: SUBJECT OF' CO[ s~: ~b ~';~? o MEMO TO FILE •"~~~' ' /8]6 ~ Roy Ramer C - 81- 0 91 Goaernor Powderhorn f hhchael B.lony r D~s'~sion Dveaor Roadside-Cameo Steve Wathen ~/~ October 29, 199) TR-19: West Portals Surface Water Hydrology PERSONS CONTACTED: Larry Reschke HOW CONTACTED: Phone I talked to Larry to ask for a copy of the map they used to model flows to the portal area. He agreed to send us this ASAP. I also got the following information: Borrow Pit• The purpose of the borrow pit is to act a reservoir for material to help reclaim the two portal areas at the time of final reclamation of the area; some material having been excavated at the portals and removed as coal. The BLM has a concern that it might be better for the portals to be reclaimed to less than original contour so that another area doesn't have to be disturbed (ie the borrow area). Larry Routten concurred with this and said that we ought to have Larry give us something on how they wish to reclaim the site after reclamation (portal seals, post mining contours). Additional Road Culverts and MSHA Berms: I told Larry that we had some question about the graveling of those drainage crossings that don't go to bedrock. He told me that BLM wanted a culvert or road bar every 500 feet, along stretches of the road that slope from 1% - 40, and that he wasn't sure how that would shake out. He said that he would have to go out in the field and decide how to do that. Larry told me that he believes that MSHA berms will be built in at least two places and perhaps at the west portals. Larry Routten mentioned that we need to confer c/ith BLM and that the Division needs to looF: at the road again in the field so as to decide upon how to integrate the Division's concerns about low water crossings and adequate road drainage; with MSHA,s concerns about safety berms and BLM's concerns about the need for additional road bars and culverts in a way that works for both the environment and the operator.