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• DESCRIPTION OF THE LAND TO BE AFFECTED <br /> The Fish Creek exploration area is located in the Twentymile Park, about eight <br /> miles Northwest of the town of Oak Creek, and about ten miles Southwest of Steamboat <br /> Springs, in Routt County. Topography of the land is shown on the Surface and Coal <br /> Ownership Maps in the Appendix. These maps are at a scale of 1:24,000 (I inch = <br /> 2,000 feet), with a 40-foot contour interval. <br /> The land uses in the exploration area are livestock grazing (sheep, cattle, and <br /> horses), hayland, small grain farming, and wildlife habitat. <br /> GEOLOGY AND HYDROLOGY <br /> A stratigraphic section representative of the Fish Creek exploration area is shown <br /> in Figure 1. Four water bearing zones are encountered. In ascending order, these are: <br /> (I) an approximately 30-foot thick sandstone and shale zone immediately below the <br /> • Wadge Coal seam, (2) the Wadge coal seam, (3) an approximately 65-foot thick section <br /> of shale immediately above the Wadge coal seam, and (4) a section of the Twentymile <br /> Sandstone about 210feet thick, near the surface. In addition, holes located along Fish <br /> Creek will penetrate the alluvial aquifer at the surface. <br /> Of the above, only the Twentymile Sandstone yields sufficient volume of water to <br /> be considered an aquifer. The Twentymile Sandstone is hydraulically isolated from the <br /> Wadge zones by a 500-foot thick layer of marine shale. A second aquifer, the Trout <br /> Creek Sandstone, is 300 feet below the Wadge coal. <br /> The piezometric level in Twentymile Park is at about 6,700 feet through the <br /> center of the exploration area. Artesian flow may therefore be expected at some of <br /> the proposed drill sites. <br /> Three creeks (Fish Creek, Middle Creek and Foidel Creek) drain surface waters <br /> from the proposed exploration area. All three creeks eventually flow into Trout Creek, <br /> which is a tributary of the Yampa River basin. Middle Creek and Foidel Creek are both <br /> intermittent through the proposed exploration area. <br /> PR-31-4 -4- <br /> 6/10/83 <br />