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SUCTION V <br />EXISTING WATER TREATMENT PLANT <br />GENERAL <br />The water treatment plant for the City of Loveland is located approxi- <br />mately seven miles northwest of Loveland and near the Big Thompson River in <br />Green Ridge Glade. The basic units of the treatment plant are shown diagram- <br />matically on Exhibit No. 8. <br />GENERAL DESCRIPTION OF OPERATION <br />Raw water is removed from the Big Thompson River through a concrete <br />intake structure located on the upstream side of the Home Supply Dam. An <br />adjustable rough -grate is incorporated in this structure for the removal of <br />large, floating debris. The unit is connected to a down- stream junction box <br />by a single pipeline. Approximately 50 feet of this line is 24 -inch wood - <br />stave pipe and the following 50 feet is 27 -inch steel pipe. <br />From this junction box two pipelines, one a 23 -inch steel pipe and the <br />other a 27 -inch steel pipe, carry the raw water to the grit chamber. In 1960, <br />this 27 -inch steel line was tapped with a 24 -inch line to by -pass raw water <br />through a micro - strainer ahead of the grit chamber. Water flows out of the <br />grit chamber, across a weir and into the chemical mixing and reaction chamber. <br />The chemical feed and storage building is built over a section of this <br />chamber. Chemical feed rates are determined by the flow over this weir. <br />Alum, carbon, fluoride and ammonia are added to the water at this point. <br />Chlorine is added just below this point. Lime is added at the settling <br />basin effluent weir for pH control. The chemically treated water, with a <br />"floc" formed, now passes to the settling basins to allow the "floc" and its <br />- 27 - <br />