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<br />. <br /> <br />. <br /> <br />. <br /> <br />Drainaqe Basin <br /> <br />The drainage basin of Anthracite Creek contributing to <br />runoff at the downstream study limit is approximately 85 square <br />miles. Approximately 5 square miles of the basin lies below 7,500 <br />feet in elevation. The mean basin altitude, calculated from a study <br />of U. S. Geological Survey quad maps, was computed to be 9,500 feet. <br /> <br />The upper Anthracite Creek basin is formed by the Raggeds <br />on the northwest, the Elk Mountains on the north, the Ruby Range on <br />the east, the Anthracite Range on the southeast, and the West Elk <br />Mountains on the south. The highest point in the basin is Mt. Owens, <br />which tops out at elevation 13,058 feet above mean sea level. <br /> <br />" <br /> <br />For 9 years, from 1938 through 1943, and from 1954 <br />through 1958, the U. S. Geological Survey maintained a recording <br />gaging station on Anthracite Creek near Floresta in the upper 17.5 <br />square miles of the basin. This station has been discontinued, <br />but the USGS maintains several other gages in the adjacent Muddy <br />Creek basin, which is geographically similar and is also tributary <br />to the North Fork Gunnison River. <br /> <br />A new gage is now planned for Anthracite Creek opposite <br />Erickson Springs Campground and should be in operation by the fall <br />of 1977. Only spot measurements taken during 1977 are available at <br />this time. <br /> <br />There are no significant diversions in the basin above <br />the study reach. <br /> <br />9 <br />