C150094 Application (2) - Laserfiche WebLink

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in the feasibility study will be based upon this available information. If necessary, a limited subsurface exploration and laboratory-testing program will be conducted to supplement available information. Topography The topography of the site will be assessed by conducting aerial photography and surveying the site to provide horizontal and vertical control. This work will allow an orthophoto of the site to be produced,with a contour interval of 2 feet. The orthophoto will provide the basis for development of accurate area-capacity tables. Hydrology The specific hydrologic conditions that affect surface water flow in Hay Gulch will be analyzed to determine if adequate water supplies will be available to maintain water storage in the reservoir at levels that will allow the enlarged facility to function as intended. Some long-term data exist that will aid in this analysis and additional area- specific groundwater data are currently being collected under a separate project. Institutional Issues A. National Environmental Policy Act("NEPA") The study will review whether there are any NEPA requirements for the Project. B. Threatened and Endangered Species ("T&E") A T&E species survey will be conducted at the site to determine if any T&E species present problems that cannot be resolved. The T&E work will include field surveys, literature research, and contacts with relevant state and federal agencies. Potential mitigation needs will be considered, if necessary. Because the enlargement project received a 404 permit from the Army Corps of Engineers, the status of the endangered fish in the San Juan River has already been considered and approved. The Red Mesa Enlargement will be used for domestic and irrigation water in the same proportions as in Red Mesa's original proposal to the Army Corps. If endangered species issues should arise during the renewal of the Red Mesa Enlargement Section 404 Permit, the section covering T&E species under the Long Hollow Reservoir scope of work herein will be followed. C. Wetlands This work plan assumes that the renewed 404 Permit will contain conditions regarding wetlands similar to those in original 404 Permit(If not, the Long Hollow work plan herein regarding wetlands will be followed). D. Cultural Resources The presence of cultural resources in the project area will be assessed through a cultural resources survey. The survey will include an inventory of cultural sites in the area of the proposed dam and reservoir, recording of 4