Laserfiche WebLink
<br />.;, ~ ,..j <br /> <br />SECTION 2 <br /> <br />BACKGROUND OF THE CITY'S WATER SUPPLY <br /> <br />RAW WATER <br /> <br />The City's raw water capacity is based upon storage in North Lake which has a capacity of 4,500 <br />acre feet of water. Additionally, Monument Lake serves as a backup raw water supply with a <br />capacity of 1,800 acre feet of water. Both lakes are kept full at all times by means of the City's <br />primary water rights on the North Fork of the Purgatoire River. These senior water rights <br />produce 8.17 cubic feet per second (cfs) or 5.28 million gallons per day (mgd). The North Fork <br />Creek flows into North Lake, the City's primary water supply. Approximately fifteen years ago, <br />the City obtained the legal right to direct, when necessary, water from the North Fork Creek into <br />Monument Lake by means of a ditch system. <br /> <br />Under normal precipitation circumstances, the City diverts water six months of the calendar year <br />in order to keep North Lake full. During the remainder of the year, flow is routed directly into <br />the river system. North Lake, at full capacity, holds the equivalent of a year's supply of raw <br />water for the entire City system demand. <br /> <br />FILTRATION <br /> <br />A piping system is used to draw raw water from North Lake to the City's water filtration plant <br />located down stream of North Lake Dam. A similar piping system is in place which would allow <br />the transmission of raw water from Monument Lake, if deemed necessary. <br /> <br />The filtration plant was built in about 1950 with a capacity of 6,000,000 gallons per day. In 1983 <br />the capacity of the plant was expanded to 8,400,000 gallons per day. <br /> <br />The plant utilizes coagulation, sedimentation, sand filter, and chlorination and fluoridation <br />processes to provide treatment. <br /> <br />TRANSMISSION <br /> <br />From the water filtration plant the treated water is transmitted to Trinidad by means of a <br />transmission line with varying diameters of pipe size ranging from eighteen to thirty-six inches. <br /> <br />Along the approximate twenty-five miles of transmission line the City maintains seven pressure <br />reduction stations. Since there is an approximate two thousand foot drop in elevation from the <br />filtration plant to Trinidad, the pressure has to be reduced at various intervals to maintain water <br />pressure within an acceptable range. <br /> <br />-3- <br />