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~~~~.)~q~ a~~U~s ~.,~., P~~~Iz ~°~7 <br />999 RECEIVtL~ <br />INTRODUCTION FEB 0 3 1995 <br />The Colorado Yampa Coal Company (CYCC) Mine No. 3 (Permit No. C-84-06~ij~;loc®tddiap¢;~I'ot~~E$49Y <br />25 miles southwest of Steamboat Springs, Colorado in Twentymile Park (Figure 1). CYCC was primarily <br />a surface coal mining operation with limited underground mining. The surface mine, active between 1974 <br />and 1980, was called Mine No. 3. The underground operation, known as the Middle Creek Mine, was <br />faced-up in a Mine No. 3 highwall. Underground operations began May l6, 1979, but the mine was <br />abandoned on June 5, 1980 due to adverse mining conditions. No significant amounts of coal were extracted <br />by the underground operation. The Wadge coal seam was extracted at both mines. There is currently no <br />active mining in this area; in total approximately 350 acres were disturbed and reclaimed. <br />Mine 3 straddles the confluence of Middle and Foidel Creeks. A small portion of Mine No. 3 drains into <br />Fish Creek; however, bond has been released for this area. All potential impacts related to Fish Creek are <br />discussed in the Annual Hydrologic Report (AHR) for the Foidel Creek Mine (Permit No. C-82-056). The <br />Mine No. 3 area has been backfilled, regraded, and revegetated. An administrative facility located in the <br />Mine No. 3 area is still used by CYCC and the Trout Creek Ranch. Routt County Road 1133 runs through <br />[he site. <br />Hydrologic monitoring was initiated in the area during 1975. Tltis report covers the hydrologic monitoring <br />• for the 1994 Water Year. Previous monitoring results are presented in prior Annual Hydrologic Reports. <br />The CYCC Mine No. 3 hydrologic monitoring program and [he following discussions are divided into four <br />parts: I) ground water, 2) surface water, 3) spoil springs, and 4) efFluent sites. Monitoring site locations <br />and elevations are shown on Figure 2. Required monitoring frequencies are presented on Table 1; associated <br />parameter lists are shown on Tables 2 and 3. The 1994 Water Year data collected at each monitoring site <br />is presented on Tables 4 through 17. Statistical summaries of each site's period of record data set are <br />presented on Tables 4a through I Sa. Figures 1 through 31 provide graphical representations of selected data. <br />Since mid-1987 hydrologic monitoring has been conducted primarily by Cyprus personnel with water quality <br />analyses primarily performed by ACZ Laboratories (formerly Bookcliffs) of Steamboat Springs, Colorado. <br />Prior to Jutte, 1986 some water quality analyses were performed by the CYCC laboratory. Two surface <br />water sites addressed in this report are monitored for flow by the US Geologic Survey (USGS). Prior to <br />the 1989 Water Year, the USGS also collected and analyzed water quality samples from the two sites. Since <br />the 1989 Water Year, Cyprus collects water quality samples for subsequent analysis by ACZ laboratories. <br />Unless otherwise indicated, all references to "1994" in this report to refer to the 1994 Water Year. <br /> <br />-1- <br />