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<br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br />(1, c ~ J ~ <br />V _ ~ ~~ <br />The Twentymile Coal Company Foidel Creek Mine is located approximately 25 miles southwest <br />of Steamboat Springs, Colorado on the south end of Twentymile Park. The associated Fish <br />Creek Tipple is located approximately 20 miles southwest of Steamboat Springs at the North end <br />of Twentymile Park and the tipple structure and related areas cover approximately 70 acres <br />(Figure 1). The surface fa:ilities cover approximately 190 acres. Approximately 58 acres of <br />the Wadge Coal seam have been mined using continuous miners. During 1990 approximately <br />120 acres have been mined using the longwall. A spur of Denver and Rio Grande Western <br />Railroad runs to the mine site and the tipple. Immediately north of the portal azea is Foidel <br />Creek into which the mine water is discharged. The mine site drainage is into four sediment <br />ponds (Ponds D, E, F and Pond G) which drain northwazd into Foidel Creek. Further north of <br />the portal azea is Fish Creek. Mining has recently extended into the Fish Creek drainage. <br />Beginning in October, 1989, some of the mine water was discharged into Fish Creek through <br />the Fish Creek Borehole. The portal area is bordered by spoil from the Colorado Yampa Coal <br />Company (CYCC) strip mines. The portal is faced-up in the down dip low-wall of the strip <br />mine. The Fish Creek Tipple site drains into Tipple Pond E which drains northwazd into Fish <br />Creek. On the tipple site and to the south are reclaimed spoils which are released from bond. <br />Hydrologic monitoring has been conducted in the areas since 1979. The tipple was constructed <br />in 1974. The underground mine was begun in 1983; however, surface coal mining has been <br />conducted in the immediate vicinity since the 1960's, This report covers the hydrologic <br />monitoring for water 1990 for Foidel Creek Mine and for the Fish Creek Tipple. The previous <br />monitoring of these areas was presented in the previous Annual Hydrologic Reports. The <br />hydrologic monitoring has been divided into five parts: 1) ground water, 2) surface water, <br />3) springs, 4) mine inflows, and 5) effluent site. The monitoring locations aze shown on <br />Figure 2 and summarized on Table 1. The parameter lists are shown on Tables 2 and 3. A <br />complete listing of all water data collected at these sites is submitted separately. Summaries of <br />-1- <br /> <br />