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<br />11-16 <br /> <br />, <br /> <br />. <br /> <br />Water from the Fire Mountain Canal can be diverted directly into <br />the pond. <br /> <br />Chlorination <br />From the settling pond the water is carried in a pipe 75 feet to <br />the chlorination building. In general, this building and its <br />equipment are in good operating order. The building houses a <br />constant feed V-Notch Model 731 Wallace Tiernan gas chlorinator. <br />From the chlorinator an a-inch main carries the water 12,000 feet <br />to the water treatment plant. There are currently 15 taps on this <br />line which are served chlorinated but otherwise unfiltered water. <br />Normally a municipal water supply is chlorinated after the water <br />is fi ltered. <br /> <br />Water Treatment Plant <br />The a-inch line from the chlorinator transmits water directly to <br />the water treatment plant where it enters an a-foot diameter, 24- <br />foot long pressure filter. This filter removes suspended solids <br />from the water, reducing turbidity and improving color and taste. <br />This filter was designed by Stan Dodson in 1953 to operate under <br />a pressure differential of 60 psi. <br /> <br />During the winter low water demand periods, when the raw water <br /> <br /> <br />supply is relatively pure, the filter operates adequately. During <br /> <br /> <br />high water demand periods, especially in the spring when the <br /> <br /> <br />water in Leroux Creek is turbid, the existing filter system is <br /> <br /> <br />inadequate. It becomes plugged with sediment after only a few <br /> <br /> <br />hours of operation. The backwash operations cannot adequately <br />