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<br />GEOLOGICAL DATA <br /> <br />A. Existing Geological Data <br /> <br />Geological information is available for the project <br />area from several sources. The United States Geological <br />Survey (USGS) has completed a general surface geological <br />map including the entire project area at a scale of 1: <br />250,000. The USGS has also completed surface geological <br />maps for the following areas: <br /> <br />Quad <br /> <br />Series <br /> <br />Mt. POvlell <br /> <br />15 min <br /> <br />Dillon <br /> <br />15 min <br /> <br />Kremmling <br /> <br />7.5 min <br /> <br />A detailed geological study of the northeastern sec- <br />tion of the proposed Sheephorn Reservoir was done by C.S. <br />Barclay in 1968, and is published as a USGS Open File Report. <br /> <br />B. Proposed Geotechnical Field Investigations <br /> <br />1) General <br /> <br />The following discussion describes the program in <br />detail. The work done early in the program along with <br />extensive review of the information currently available <br />may require changes in the location of, or addition to, <br />the planned geotechnical field investigations, including <br />drill holes, geophysical lines, trenches and areas of <br />mapping. The program will be designed to avoid disturbances <br />of existing vegetation and terrain. Environmental impacts <br />of the geophysical investigation will be negligible. The <br />impact of the geological investigation will be minimal. <br />Localized, light brushing at geophone locations may be re- <br />quired to survey in geophone locations. Disturbance during <br />drilling operations will be minimal. Dri~l holes will be <br />located in existing clear areas where possible. In project <br />areas not served by existing access routes, field investi- <br />gations will be made either on foot or by helicopter where <br />possible. It is presently anticipated that no road cuts <br />or construction will be required for access for drilling <br />or geophysical work. <br /> <br />There are no activities planned which will affect <br />people or wildlife in the project area. The geophysical <br />program is flexible enough for the work to be structured <br />when people or wildlife are not within the vicinity. In <br />project areas found to be particularly sensitive or non- <br />sensitive to geophysical activities, changes can be made <br />by the progra~ to mitigate any potential problems. <br /> <br />-3- <br />