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<br />General <br /> <br />The facilities now available ta Denver and its present sources <br />of water, as well as the warks embodied in the program which is <br />under construction, are fairly well known. Figure 1 is a vicinity <br />map on which are indicated the existing facilities from which <br />Denver derives its present water supplies, those which are under <br />construction and those to be constructed, The existing facilities <br />are depicted in green, and the ones under construction and those <br />to be constructed are depicted in red. <br /> <br />The original source of water from the Denver system was <br />that made availoble under direct-flow water rights owned by <br />Denver on the South Platte and some of its tributaries, such as <br />Bear Creek and Cherry Creek. The total average supply from <br />these sources is estimated at 63,000 acre-feet annually. <br /> <br />The next source of water made available to the City was <br />from water stored in Cheesman, Eleven Mile, and Antero reser- <br />voirs, which have a combined operating capacity of about 184,- <br />000 acre-feet, The average annual amount of water derived from <br />this storage in the 24-year period October 1930 through Septem- <br />ber 1954 was about 22,000 acre-feet, <br /> <br />Most of the water from South Platte sources is diverted <br />at Intake as shown on Figure 1. This water is treated at the <br />Kassler and Marston filter plants. Marston Lake, has a capacity <br />of 17,850 acre-feet and is used for temporary detention and as <br />fore bay for the Marston filter plants, <br /> <br />Western Slope sources of water began to be sought by Den- <br />ver some 40 years ago. The first water physically diverted was in <br />1936 when a portion of the pilot bore of the Moffat Tunnel was <br />I ined and parts of the collection systems for Fraser River, and St. <br />Louis and Vasquez .creeks were completed, As a part of the ori- <br />ginal system a conduit was constructed from South Boulder Creek <br />to Ralston Creek Reservoir which reservoir has a capacity of 11,- <br />300 acre-feet. Thence the water was transported to Moffat Filter <br />Plant which was constructed at that time, Some of the water <br />