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<br />Table A-2 <br />Ridges Basin Reservoir <br />Capacities (acre-feet) <br />Active capacity <br />Inactive capacity <br />Dead storage <br />Total <br />Surcharge capacity <br />Deposited sediments after 100 years <br />(acre-feet) <br />Surface areas (acres) <br />Top of active capacity <br />Top of inactive capacity <br />Top of dead storage <br />Top of surcharge capacity <br /> <br />130 ,000 <br />150,000 <br />40 <br />280,040 <br />9,200 <br /> <br />1,000 <br /> <br />2,270 <br />1,657 <br />1 <br />2,302 <br /> <br />An existing 4-wheel-drive trail would be upgraded to <br />allow construction access to the dam from County Road 213, 3.5 miles <br />southeast of the damsite. After construction the dam would be accessible <br />from an existing improved road along with 1.3 miles of the construction <br />access road which would then be improved. A road about 3 miles long <br />would be built along a part of the north side of the reservoir to <br />provide access to the proposed recreat ion area and to the Ridges Bas in <br />Pumping Plant. The filling of the reservoir would result in the inun- <br />dation of 1.6 miles of unpaved County Road 211 and 1.5 miles of an <br />unpaved service road. <br /> <br />. (c) Durango M&I Pipeline <br /> <br />The Durango M&I Pipeline would deliver treated water <br />at a rate of 29 cfs from a new treatment plant to be constructed by the <br />water users, to the city of Durango. Locations for the plant and pipe- <br />line are now being studied, and one possible alternative is shown on the <br />General Map. Made of 27-inch-diameter pressure pipe, the line would be <br />buried with a minimum ground cover of 3 feet, and would be about 2.3 <br />miles long, crossing under the Animas River, State Highway 160 and <br />about 6 blocks of city streets before connecting with the city's distri- <br />bution system. Construction access would be from existing roads. <br />The water pressure in the pipeline would be about equal to that in the <br />pipeline from the city's existing treatment plant, so that the in~roduc- <br />tion of water from either source into the existing distribution system <br />would not be inhibited. <br /> <br />(d) Ridges Basin Pumping Plant <br /> <br />Ridges Basin Pumping Plant would be constructed at <br />the west end of the reservoir to deliver a maximum of 700 cfs of water to <br />the Dry Side Canal. It would house eight electrical pumps, a trans- <br />former, and operation and maintenance shops in a building with approxi- <br />mately 15,000 square feet of floor space. The pump lift would vary from <br />264 to 330 feet, depending upon the water level in the reservoir. The <br /> <br />A-9 <br />