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I I I I I I I I I I I I I I I I I I I 12 VI. CONSTRUCTION PROGRAM C. Grass-lined channel through Marston Water Treatment Plant property 318,600 Because of the amount of total estimated capital expenditures ($3,748,000) required for the drainage and flood control improvements, we have separated the expenditures into stages of construction programs. Total $ 856,700 Stage 2 Stage 1 As part of the Stage 1 program, the highest priority must be placed on immediately obtaining and holding land for the proposed drainage improve-ment right-of-way. Privately owned lands in identified floodplain that are needed for the drainageway improvements should be obtained, where possible, through dedication to City at time of zoning or subdivision platting. Responsibility for drainageway improvements on such lands should be with the developments as they occur. Because of the extensive existing development and the rapid rate of continuing development, no other economic solutions for the watershed drainage and flood control problems will be available if this land is lost. Because most of the flood damages in this watershed at present time occur in Reach 2 between Marston Water Treatment Plant property and Colorado State Highway 121, the proposed grass-lined and concrete- lined channels in this reach should also be constructed as Stage 2 construction. The estimated capital expenditures including engineering, contingen- cies, fiscal, legal and administative expenses for the recommended Stage 2 construction program are as follows: A. Concrete-lined Channel $ 945,000 ~ext in order of priority for the drainage and flood control improve- ments is to open saddles in Reach 2 and provide a definite drainageway through the Marston Water Treatment Plant property once the saddles are opened. This will serve to provide immediate solutions for the most critical problems, of water entering Marston Lake and flooding Marston Shores. B. Grass,lined Channel 142,800 C. Concrete Box Culvert of Old Wadsworth 25,900 Total $1,113,700 Stage 3 The estimated capital expenditures including engineering, contingency, fiscal, le~al and administrative expenses for the recommended Stage 1 construction program areas follows: A. Land Acquisition $ 508,800 The Stage 3 construction program includes all improvements starting at Quincy Avenue and proceeding to Bear Creek. The estimated capital expenditures including engineering, contingencies, fiscal, legal and administrative expenses for the recommended Stage 3 construction excluding improvements of Ft. Logan Cemetary property, are as follows: B. 161-inch x 101-inch CMP at Marston Lake caretaker's house access 29,300 A. Low Flow Pipe at Quincy Avenue $ 238,300 B. Sheridan Blvd. Crossing 244,900