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perennial stream located east of the mine area, and by an unnamed <br />tributary to Taylor Creek, an intermittent stream west of the <br />property. Goodspring Creek flows northward to its confluence with <br />Milk Creek. Taylor Creek flows northward to where it joins Wilson <br />Creek, a perennial stream which continues northeastward to its <br />confluence with Mflk Creek. Milk Creek has a mean annual flow of <br />approximately 20,000 acre feet and is a southern tributary of the <br />Yampa River which rises along the divide between the Yampa and <br />White Rivers. Milk Creek flows in a generally northerly direction <br />to enter the Yampa approximately 14 miles downstream from Craig, <br />Colorado. The mean annual flow of the Yampa River at the Maybell <br />Gage situated downstream of the area of interest is in excess of <br />one million acre feet per year. The Yampa River is tributary to <br />the Green River which enters the Colorado River in Utah. See Map <br />32 for locations of the surface drainages. <br />Permit Area <br />The streams of concern for the Colowyo Mine include Taylor Creek, <br />Streeter Gulch, Wilson Creek and Goodspring Creek. Taylor Creek <br />and Streeter Gulch are intermittent and ephemeral drainages, <br />respectively; Wilson and Goodspring Creeks are perennial streams. <br />Surface water has been studied extensively since 1973 by various <br />investigations. These investigations include the EMRIA Program <br />sponsored by the Bureau of Land Management (BLM) and conducted by <br />the USGS. Additionally, the Colowyo Coal Company and its <br />consultants have conducted monitoring programs for various <br />parameters during the recent past. <br />The USGS has continuously monitored several of the drainages, <br />including Taylor, Wilson and Goodspring Creek, for flow volumes and <br />quality parameters. Colowyo Coal Company and its consultants have <br />also monitored the USGS stations as well as additional stations in <br />and adjacent to the mine area. Limited sampling has also occurred <br />on drainages outside the general and adjacent areas. These sample <br />stations were located on Collum Gulch, Straight Gulch, Jubb Creek, <br />and Milk Creek. The data for these stations are not analyzed here <br />but are presented in Exhibit 7a. <br />~~ <br />2.04.7-28 <br />