CT2015-052 Feasibility Study 2 - Laserfiche WebLink

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The District chose to proceed with rehabilitation and expansion, in phases. Phase one will involve rehabilitation of the outlet pipe with epoxy slip lining. This will meet all the State capacity design requirements including requirements of the eventual expansion contemplated in Alternative No.4. The old steel pipe extension and concrete plug will be removed and replaced so as to allow an increase in active storage of 67 acre feet. A new slide gate, trash rack and concrete vault to house the gate mechanism will be included. The spillway width will be increased to 150 feet from the present 50 feet. A seepage filter will be installed on the right abutment. Table 1 shows a cost breakdown for phase one and phase two. Engineering studies conducted by Colorado River Engineering are attached as Appendices E and F. T bl 1 U Ark Wt C D' 't N rth F k D P' a e . Jpper ansas a er onservancy Istnc - 0 or am rOJect NORTH FORK ENLARGEMENT Engineer's Estimate Phase One WORK DESCRIPTION COST ESTIMATE General Preparation $ 34,500.00 Outlet Rehabilitation $ 173,125.00 Spillway Enlargement $ 32,396.00 Blanket Filter Right Abutment $ 4,450.00 *Engineering, Surveying, NEPA Permitting (both phases) $ 217,000.00 Contingency $ 54,221.00 Total Phase One I $ 515,692.00 Phase Two General Preparation $ 555,850.00 Outlet Extension $ 36,750.00 Spillway Enlargement $ 61,400.00 Embankment $ 1,540,800.00 *Engineering, Permitting, Testing $ 117,000.00 Contingency $ 482,360.00 **Total Phase Two I $ 2,794,160.00 GRAND TOTAL $ 3,309,852.00 NOTE: The above costs do not include feasibility costs and legal costs associated with permitting nor do they include local permits. **Phase Two costs assume completion of the Phase One Project as a prerequisite. Costs are estimated at the feasibility level review. Cost estimates to be refined following design packet preparation. uawcd Feasibility Study Rev.doc Page 7 of9