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iii iiiiiiiiiiiu-iii 999 i TR9PPER 1RININ6 INC. March 11, 1992 G CERTIFIED #P568141859 Mr. Kent Gorham Colorado Mined Land Reclamation Division 215 Centennial Bldg. 1313 Sherman Sc Denver, CO 80203 Dear Kent: Subject Technical Revision 62 (TR-62). 1991 Annual Report, Appends W, Sections 1-7 Trapper Mine's Annual Report for 1991 is composed of seven sections. Section 1.0 reports 1991 reclama- tion activity as specified in Section 2.04.13 of the Colorado Mined Land Reclamation Board Regulations for Coal Mining. All appropriate maps are enclosed. Section 2.0 is the Annual Hydrology Report and is composed of nine subsections. Subsection 2.9 is a pro- posal to modify Trapper's groundwater sampling frequenry. 2.1 Climatological Data 2.2 Pit Dewatering and Consumptive Water Use for 1991 2.3 Mining Advancement and Ash Disposal 2.4 Monitoring Points 2.5 Hydrological Data (Hydro-Engineering Inc. report) 2.6 Hydrological Trends 2.7 Spoil Spring Sampling 2.8 Monitoring Well Abandonment 2.9 Proposed Hydrological Monitoring Frequenry Reductions for 1992 Section 3.0 is a report on Trapper's drainageway rewnswction efforts 1987-91. It consists of a nartative segment describing our reconstruction methods and results as well as a map showing the locations of our drainageway reconstruction efforts minewide. In 1991, approximately 6,500 feet of drainage reconswclion was performed in Johnson and East Buzzard Gulches. Peak flow data from the 10-year, 24-hour parsha0 flume located in Coyote drainage are included. Section 4.0 is the recontoured spoil sampling section. This section includes site specific spoil analysis data and a map showing spoil texture and sample identification numbers for Ashmore pit only. Section 5.0 is a narrative and map showing topsoil stockpiles constructed in 1991 and proposed 1992 topsoil stockpile lop[ions. Additionally, the map has been updated to show all existing topsoil stockpiles minewide with appropriate identification numbers. The narrative and accompanying table describes topsoil sttxkpile locations, size and approximate volumes. lncluded is a single topsoil pile constructed in early 1992 and located north of the Middle Ashmore pit hautroad ramp #1. Section 6.0 titled Livestock Ponds is a map, narrative and revaed table showing the actual locations of ponds constructed in 1991 and proposed locations for ponds which may be constructed in 1992. Appropriate cor- respondence (Qualified Impoundment Inspector) verifying pond conswction standards and specifications is enclosed. P.0. Box 167 Craig, Colorado 61626 (303) 624-4401