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N <br /> o Evaluate potential financial and institutional constraints to determine whether CC <br /> there is a fatal flaw. <br /> o Determine affects of the Project on the Indian Trust Assets of Native 7 <br /> American tribes and nations. <br /> Study Plan—Phase I Initial Feasibility(Fatal Flaw)Analysis <br /> Each work task is described below. Cost estimates for each task are presented in Table <br /> 3 a. <br /> Review Existing Data <br /> W ■E will review pertinent published information from the U.S. Geological Survey <br /> (USGS), the USBR and the Colorado Geological Survey to obtain an understanding of <br /> the site geology and the potential requirements for design and construction of a dam and <br /> reservoir at the site. <br /> Topography <br /> The topography of the site will be assessed by conducting aerial photography and <br /> surveying the site to provide horizontal and vertical control. This work will allow <br /> production of an orthophoto of the site,with a contour interval of 2 feet, to be produced. <br /> The orthophoto will provide the basis for development of accurate area-capacity tables. <br /> Geologic Reconnaissance <br /> A reconnaissance will be made of the dam and reservoir area to observe the surface <br /> geology, estimate groundwater seepage patterns and gain familiarity with site conditions. <br /> Data obtained during the geologic reconnaissance will identify structural geology, <br /> groundwater, seismicity and geologic hazards, which must be considered in the design <br /> and construction of the dam and reservoir. The information obtained will be used to <br /> assist in selecting preliminary alignments for the embankment, the spillway and outlet <br /> works. <br /> Groundwater Hydrology <br /> The specific hydrologic conditions that affect surface water flow in Long Hollow Creek <br /> and its tributaries will be analyzed to determine if water supplies will be adequate to <br /> maintain water storage in the reservoir at levels that will allow the facility to function as <br /> intended. These hydrologic conditions include both irrigation return flows and diversions <br /> from the La Plata River. Some existing long-term data will aid in the analysis and <br /> additional area-specific groundwater data are currently being collected under a separate <br /> project. <br /> Institutional Issues <br /> A. National Environmental Policy Act(NEPA) <br /> The study will review whether there are any NEPA requirements for the <br /> Project. <br /> B. Threatened and Endangered Species ("T&E") <br /> 12 <br />