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1 <br />1 <br />1 <br /> <br />1 <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br />INTRODl1CTI0N <br />The Colorado Yampa Coal Company Mine 1, Mine 2 and Eckman Park Mine are <br />located approximately 25 miles southwest of Steamboat Springs, Colorado jn <br />Twentymile Park (Figure 1). They are all surface coal mining operation4. <br />Mine 1 and the Eckman Park Mine (collectively called Mine 1 in this report) <br />are located near the top of the Foidel Creek drainage in the south end of <br />Twentymile Park. A very small portion of the disturbed area extends into <br />the middle Creek drainage. The Wadge coal seam is extracted. There is <br />still active mining in this area and a total of approximately 2200 acres <br />have been disturbed in Eckman Park. Mine 2 is located on the south side of <br />the Fish Creek drainage in the middle of Twentymile Park. The Fish Creek <br />coal seam, which overlies the Wadge Coal seam was extracted at Mine 2. No <br />active mining is taking place at Mine No. 2 and the area has been completely <br />backfilled, regraded, and revegetated. A total area of approximately 885 <br />acres was disturbed at Mine 2. A total area of approximately 3175 acres has <br />been disturbed at Mine 1. This includes a coal loadout, maintenance and <br />administrative facilities. Also, Mine 1 is adjacent to Twentymile Coal <br />Company's Foidel Creek underground mine. The operations share some of the <br />discharge control facilities. A spur of the Denver and Rio Grande Western <br />Railroad runs to the site. <br />Hydrologic monitoring has been conducted in the area since 1975. Surface <br />coal mining activities in the Mine 1 area have been conducted since the <br />1960's. Surface coal mining in the Mine 2 area were conducted from 1975 <br />to 1981. This report covers the hydrologic monitoring for the 1987 water <br />year. The previous monitoring of this area was presented in the 1986 Annual <br />Hydrologic Report. The hydrologic monitoring has been divided into four <br />parts: 1) ground water, 2) surface water, 3) spoil springs, and 4) <br />effluent sites. The monitoring locations are shown on Figures 2 and 3 and <br />summarized on Table 1. The parameter lists are shown on Tables 2 and 3.. A <br />complete listing of all water data collected at the monitoring sites is <br />submitted separately. Summaries of the complete data set and the 1987 data <br />are presented on Tables 4 to 68 and Figures 4 to 51. <br /> <br />