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IDAHO SPRINGS RESERVOIR DAM FEASIBILITY STUDY <br />CONSTRUCTION COST ESTIMATE TO RESTORE TO 227 AF <br />Quanfity Unit Total <br />Item/Task Description # Units Unit Cost Cost <br />A. PLANNING COSTS $8,500 <br />B. DESIGN COSTS @ 10% OF $87,325 <br />CONSTRUCTION COSTS <br />C. CONSTRUCTION COSTS <br />SAFETY AND MAINTENANCE <br />1. Update Emergency Preparedness Plan 1 LS $500 $�00 <br />2. Reseat Oil Gland Nut 1 LS $500 $500 <br />3. Install Survey Monuments 7 EA $200 $1,400 <br />4. Install Piezometers in New Toe Berm 2 EA $3,000 $6,000 <br />5. Dress Dam Slopes <br />Grading w/ Dozer 2 WEEKS $2,000 $4,000 <br />Supplemental Rip-Rap 1 LS $1,000 $1,000 <br />6. Install Cut-off Wall at Outlet 1 LS $5,000 $5,000 <br />SEEPAGE <br />7. Seal Seeps @ Reservoir Dam Face <br />Seal Borrow Pit w/ gunite or concrete 30,000 SF $10 $300,000 <br />(150 ft by 200 ft; 6 in thick) <br />Seal other apparent seeps (assume 3 3 EA $10,000 $30,000 <br />totai) <br />8. Hot Asphalt Injection Grouting 1,600 VF $80 $128,000 <br />(200LF of dam seeps; holes at 5 ft o.c. <br />= 20 holes; assume 40 ft deep holes; <br />20 holes @ 40 ft deep = 1,600 <br />vertical feet) <br />9. Install Free Draining Rock Berm @ Dam Toe <br />Remove ex. dirt road (3 ft deep by 780 CY $7.50 $5,850 <br />10 ft wide by 700 ft long) <br />Add rock w/ dozer (10 ft wide by 2,600 CY $15 $39,000 <br />10 ft high by 700 ft long) <br />SPILL WAY <br />10. Line Ex Ditch west of Conc. Spillway 100 LF $20 $2,000 <br />(assume 100 ft long) <br />11. Conc. Spillway Rehab (remove water 350 CY $1,000 $350,000 <br />stops, install weeps, rock anchor <br />ex. failing walls, overlay both <br />walls and bottom slab w/ 1 ft <br />thick anchored reinforced concrete) <br />SUBTOTAL CONSTRUCTION COSTS $873,250 <br />D. CONSTRUCTION CONTINGENCIES $87,325 <br />@ 10% OF CONSTRUCTION COSTS <br />E. CONSTRUCTION ENGINEERING @ $43,600 <br />5% OF CONSTRUCTION COSTS <br />TOTAL $1,100,000 <br />IDAHOFS.XLS <br />