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The Huerfano-Cucharas Irrigation Company <br />May 12, 2009 (UPDATED May 22, 2009) <br />Page 5 of 7 <br />This Project will include the following items: <br />Agenda Item 17h <br />1. A hydrologic model will be developed to determine at what elevation the lowered <br />spillway can safely pass the inflow design flood with adequate freeboard. <br />2. An analysis will be completed to determine if there are structural concerns relating to the <br />proposed Reservoir storage level. <br />3. Plans and specifications will be developed for lowering the existing spillway. <br />4. A dam break model and dam break inundation map will be developed to verify the dam <br />hazard class based on the reduced Reservoir storage level and for use in the updated <br />Emergency Action Plan. <br />5. Replacement of the two 30-inch diameter outlet gates. <br />6. A monitoring program will be implemented that will transmit data (weather information, <br />inflow, outflow, Reservoir level, and seepage measurement) at regulaz intervals via the <br />SEO satellite monitoring system. <br />7. An updated Emergency Action Plan will be developed for the newly configured <br />dam and Reservoir. <br />$. The irrigation delivery system will also be updated with new gates and repair on the <br />river diversion <br />Table 2. Cost Estimate <br />Engineering $265,000 <br />Construction <br />Spillway Modifications $225,000 <br />Sluice Gate Replacement $160,000 <br />Stability/Seepage Control Berm $358,000 <br />Monitoring and Instrumentation $115,000 <br />Irrigation System Improvements $160,000 <br />� Mobilization $64,000 <br />Construction Observation $64,000 <br />Testing $26,000 <br />Survey $26,000 <br />Contingency $321,000 <br />TOTAL $1,784,000 <br />Pending SEO plan approval, Project construction is expected to begin during the winter of <br />2009/2010. <br />