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<br />The Twentymile Coal Company (TCC) Foidel Creek Mine is located approximately 25 miles southwest of <br />Steamboat Springs, Colorado a[ [he south end of Twentymile Park (Figure 1). The associated Fish Creek Tipple <br />is located approximately 20 miles southwest of Steamboat Springs at the north end of Twentymile Park. The <br />TCC surface facilities cover approximately 330 acres. The Fish Creek Tipple azea covers approximately IS <br />acres. The trench and berm rockfall mitigation structures located north of the primary TCC facilities cover <br />approximately 30 acres. The coal refuse pile at TCC covers approximately 70 acres. Other associated satellite <br />TCC support facilities contribute approximately an additional 10 [o I S acres of disturbance. <br />The Foidel Creek Mine portals and surface facility areas are bordered by spoil from the Colorado Yampa Coal <br />Company (CYCC) strip mines. The portals are faced-up in rite down dip low-wall of the strip mine. Hydrologic <br />monitoring was initiated in the area during 1979. The Foidel Creek Mine was established in 1983, however, <br />surface coal mining has been conducted in the area since the 1960's. The Fish Creek Tipple was constructed in <br />1974. This report covers [he hydrologic monitoring for the 2000 Water Year. Previous monitoring results are <br />presented in prior Annual Hydrologic Reports. The TCC Foidel Creek Mine hydrologic monitoring program and <br />the following discussions are divided into eight parts: 1) bedrock groundwater, 2) alluvial groundwater, 3) surface <br />water, 4) natural springs, 5) spoil springs, 6) mine water discharge sites, 7) NPDES discharge sites, and 8) mine <br />inflow monitoring. Fish Creek Alluvial Valley Floor mining area hydrology data has been presented previously <br />in the Firs[ Half 1994 and Second Half 1994 Subsidence Reports submitted to the Division by TCC. Monitoring <br />site locations and elevations are shown on Figure 2. For required monitoring frequencies and ,associated <br />parameter lists the reader is referred to Permit No. C-82-056 Exhibit 14. The 2000 Water Year data collected at <br />each monitoring site is presented as Tables 1 through 55 and 57 through 71. Data values returned during 2000 <br />which lie beyond previously established ranges are highlighted on [he tables providing 2000 Water Year data. <br />Table 56 provides a historical summary of flow rate data for the surface water monitoring sites. Table 72 <br />provides low-quality coal haulage figures for the 2000 Water Year. Statistical summaries of monitoring site's <br />period of record data sets follow the 2000 Water Year data. Period of record statistical summaries of water levels <br />or flows as appropriate are presented as well. Figures 1 and 2 depict the general location of [he project area and <br />specific monitoring locations associated with the TCC operations. Figures 3 through 133 provide graphical <br />representations of selected data. Figure 134 presents data documented during the 2000 Mine Inflow Study. <br />Figure 135 provides the location of the Foidel Creek in relation to panels 9 Right through 6 Right. Figure 136 <br />provides the Middle Creek profile over panels 2 Right through 6 Right <br />Foidel Creek flows adjacent to the TCC Foidel Creek Mine surface facilities and receives treated effluent from a <br />series of sediment ponds established at the facility. Mine site drainage is controlled through seven (7) sediment <br />ponds (Ponds T, B, C, D, E, F, and G). Mine water is discharged from the mine and routed through Pond D prior <br />to being discharged to Foidel Creek. The Fish Creek drainage is located north of the Foidel Creek Mine surface <br />facilities area and overlies tracts, which have been longwall mined. Mine water is discharged into Fish Creek via <br />the Fish Creek Borehole facilities. At the Fish Creek Tipple site and to the south of the TCC Foidel Creek Mine <br />surface facilities are reclaimed areas of the surface operations, which have been released from bond. <br />