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<br />.' <br /> <br />. <br /> <br />. <br /> <br />Appendix 2 - Study Plan <br />Elkhead Reservoir Enlargement <br /> <br />Development and implementation of detailed studies to address Issues identified III <br />NEP A scoping. <br /> <br />Preparation of draft and final mitigation plans and related cost estimates. <br /> <br />Engineering Studies <br /> <br />Development of feasibility-level engineering designs for a 15-foot enlargement of <br />Elkhead Dam, including alternative configurations. <br /> <br />Development ofrevised dam design hydrology including the probable maximum flood. <br /> <br />Feasibility-level engineering of fish contaiument structures necessary at the dam to <br />contain non-native game fish to reduce impacts to native fishes in the Yampa and Green <br />rivers. <br /> <br />Development of an estimate of impacts related to the dam enlargement construction. <br /> <br />Development of mapping to support the engineering and environmental analyses. <br /> <br />Development of feasibility level cost information related to the dam enlargement. <br /> <br />Administrative Services <br /> <br />In addition to in-house project management, the River District will contract for' administrative <br />support to obtain the necessary permits to effect the reservoir enlargement. The administrative <br />services will include: <br /> <br />Filing an application for a Clean Water Act Section 404 Permit. <br /> <br />Coordinating the information needs of agencies issuing permits. <br /> <br />Conducting the process to comply with NEP A scoping and other regulatory requirements. <br /> <br />Estimated Cost Through NEP A Scoping <br /> <br />Administrative Services <br />Environmental Studies <br />Engineering Studies <br /> <br />$183,339 <br />189,962 <br />161.099 <br /> <br />Subtotal <br />Contingency at 10% <br /> <br />$534,400 <br />53.440 <br /> <br />Total Estimated Cost Through NEP A Scoping <br /> <br />$587,840 <br /> <br />2 <br />