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iii iiiiiiiiniiiiii~ 999 The Pittsburg & Midway Coal Mining Co. R ~f;FIVED A Chevron Company Q~ 24 1995 Edna Mine P.0. Box 176, Oak Creek, CO 80467 (9 7 0) 7 3 6-8111 Division of nninerais u Geology Re: West Ridge Hydrologic Plan Progress Report Ms. Susan Burgmaier October 23, 1995 CDMG 1313 Sherman St. Room 215 Denver, CO 80203-2273 Dear Ms. Burgmaier: This letter will serve as a progress report on the Edna Mine's West Ridge Hydrologic Plan. This progress report satisfies requirements set forth in Stipulation #31 of the Edna Mine Permit (C-80-001) for yearly reporting, by October 31 of each year, until project completion. This report notes progress through 10/23/95 and will also outline the climatic conditions experienced during the start of the 1995 field season, and to a lesser extent the end of the season, that may lead to project completion at a later date than the October 31, 1995 deadline. Work on the project this year has involved construction of the terraces mentioned in Phase III of the plan listed in Appendix 4.6M of the Edna Mine permit. As mentioned in last years update, the order of construction was changed slightly to accommodate grading work that needed to be completed on the remaining final pit spoils. This grading along with working around topsoil replacement activities in the area led management to a decision to construct the terraces above the old West Ridge haul road first and then push to finish the construction below the road. To date, terraces 9-14 are completed from the top of the ridge to the West Ridge Center Ridge draw. Terraces 7 and S are completed from the top of the ridge to the old West Ridge Haul road, and Terrace #6 is completed from the old West Ridge Haul road to the first of the check dam structures. The settlement agreement outlining the timing of this project outlines climatic conditions as a viable reason for construction delays. Following is a recap of conditions noted from Mr. Terry Crowner's daily activity diary that will show weather delays at the start of the 1995 field season. Appendix 4.6M of the Edna Mine Permit anticipated the field season to run from June - September of each year. According to Mr. Crowner's log the mine experienced snow of recordable quantity (greater than 1/2 inch) on April 10, 11, 18, 19, 20, 21, 26 (8 inches), 29 and 30. In May snow and rain days were noted as May 8, 9, 12 (CDMG inspection date) and 17 (CDMG inspection dates 5/18&19/95). Work was started on the terraces on