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Colowyo Coal Company, L.P. 5731 State Highway 13 Meeker, Colorado 81641 (970) g24-1572 (970) g24-1598 FAX •~ James A. Kiger Senior Environmental Engineer Mazch 9, 2000 • Mr. Byron Walker Environmental Protection Specialist Colorado Division of Minerals and Geology 215 Centennial Building 1313 Sherman Street Denver, CO 80203 //~ Kennecott ~ . Energy Colowyo Coal Company L.P RECEh'FD MAR 1 ~ 2000 Division of Minerals & Geology RE: 1999 ANNUAL RECLAMATION REPORT and ANNUAL HYDROLOGY REPORT CDMG PERMIT C-81-019 COLOWYO COAL COMPANY L.P. Dear Mr. Walker: Enclosed for the Division's review is the Colowyo Coal Company L.P., 1999 Annual Reclamation Report and Annual Hydrology Report. This report is submitted to comply with all the environmental monitoring requirements at the Colowyo mine as specified in Mining Permit C-81-019. ' The 1999 report continues to follow the same format as previous reports submitted to and approved by the Division. Backfilling Grading and To soil Replacement During 1999 approximately 70.8 acres were backfilled, graded, topsoiled and seeded. 131.4 acres of additional disturbance occurred during annual topsoil removal operations necessary for pit advances. (Note that this total disturbance acreage includes areas with a topsoil stripping variance). The distribution of the acreages between pits during 1999 is as follows. See Exhibit 9 - 1999 Annual Report for locations of these areas. Pit Area Disturbance (~cresl Reseeded (acresl West Pit 65.8 7.9 East Pit 16.1 37.5 Section 16 49.5 25.4 Total 131.4 70.8 During 1999 Colowyo received approval of Technical Revision No. 48 which provided for a modification to the postmining topography in the vicinity of the NE corner of the West Pit Fill. To implement this revised topography, portions of the 1995, 1996 and 1997 reclaimed areas had to be redisturbed by topsoil removal and the placement of additional spoil material .