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<br />million gallons in 1978. Sales per metered customer have varied from <br />110,900 gallons to 141,500 gallons reflecting variation in use due <br />primarily to weather which affects irrigation demand. The 1978 sales <br />include approximately 34 million gallons for irrigation of the Hlwan <br />Golf Course, the largest amount ever supplied to the course. <br /> <br />System Description <br /> <br />:1 <br />II <br />,I <br />'1 <br />I <br />!I <br /> <br />The water system takes raw water from the supply in Bear Creek <br /> <br /> <br />above Evergreen Dam. The system contains two raw water intakes, the <br /> <br /> <br />main one located on the dam about 8-feet beneath the lake level and <br /> <br /> <br />the second located near the south end of the dam. The system does <br /> <br /> <br />not own any raw water storage, but, derives some detention storage <br /> <br /> <br />benefits from Evergreen Lake which is owned by the City and Couoty <br /> <br /> <br />.of Denver. <br /> <br />There are two treatment plants which are referred to as the <br /> <br /> <br />old and new plants. Both are located at the foot of the dam and <br /> <br /> <br />a combined capacity of 2,350,000 gallons per day. The old plant <br /> <br /> <br />a capacity of 350,000 gallons per day and currently is not being <br /> <br /> <br />but it could be used if necessary. . The new plant has a capacity <br /> <br /> <br />2,000,000 gallons per day. Both plants contain a microstrainer, a <br /> <br /> <br />gravity clarifier, sand or activated charcoal filter bedS and chemical <br /> <br /> <br />feed facilities. <br /> <br />'I <br />';1 <br /> <br />Raw water enters the treatment plant and is microstrained to <br /> <br /> <br />capture the larger particles in the water, then it is pre-chlorinated <br /> <br /> <br />at the rate of one to two parts per million depending on the quality <br /> <br /> <br />of the water. Chlorine is added to kill the bacteria. In addition, <br /> <br /> <br />during periods of high turbidity (dirty water), the chemicals, alum <br /> <br /> <br />and lime, are added which settles the suspended particles. Next, <br /> <br /> <br />the water is filtered and then at least one part per million chlorine, <br /> <br /> <br />1.2 parts per million fluoride and sodium zinc metaphosfate are added <br /> <br /> <br />to the water to keep crustations off the inside of pipes. The clear <br /> <br />':1 <br />., <br /> <br />;1 <br /> <br />'I <br /> <br />-5- <br /> <br />i' <br />. <br />il <br /> <br />;1 <br /> <br />I <br />, <br />'I <br />II <br />