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<br />II <br />II <br />II <br />II <br />II <br />II <br />~ <br />il <br />II <br /> <br />This initial settling reservoir would serve the following purposes: <br /> <br />l. Act as a presedimentation basin to remove the heavy silt load <br />before water goes to the treatment plant. <br /> <br />2. Provide reserve raw water storage so that during periods of extremely <br /> <br /> <br />high turbidity, water could be used out of the reservoir totally and none. <br /> <br /> <br />would be diverted out of the river. A reservoir capacity of 36 mg would <br /> <br /> <br />provide 5 days storage during peak month of 1974 and would provide over 2 <br /> <br /> <br />days storage during peak month of 1993. During the winter month of least <br /> <br /> <br />demand the reservoir would provide 19 days storage in 1974 and 9 days storage <br /> <br />in 1993. <br /> <br />The 1973 estimated cost for the initial settling reservoir as shown in Section 6 <br />is $115,500. <br /> <br />I <br />I <br />I <br /> <br />It was shown in Section 3 that it would be more economical over the next 20 <br /> <br /> <br />years to pump all water to the treatment plant rather than to continue using <br /> <br /> <br />the existing raw water line in conjunction with the existing pump station. <br /> <br /> <br />It is obvious that if an initial settling reservoir is constructed as proposed <br /> <br /> <br />above a means must be provided to transfer the raw water from the reservoir up <br /> <br /> <br />to the plant. Effluent from the backwash settling basins would flow into <br /> <br /> <br />the initial settling reservoir and would be subsequently pumped back up to <br /> <br /> <br />the plant completing the recycling of this backwash water. <br /> <br />I <br /> <br />Because of the availability of land and the subsequent location of the <br /> <br /> <br />initial settling reservoir the pump station must be located adjacent to the <br /> <br /> <br />reservoir. Exhibit No. 7 shows the proposed location of the pump station <br /> <br /> <br />to pump raw water from the reservoir to the treatment plant. The 1973 estimate <br /> <br /> <br />for this pumping facility and associated transmission line is $234,500. <br /> <br />~I <br /> <br />-I <br /> <br />.1 <br /> <br />The Hydraulic Ditch runs through the property where the initial settling <br /> <br /> <br />reservoir is to be located but the reservoir is approximately 1 mile from the <br /> <br /> <br />Hydraulic Ditch diversion point on the Arkansas River. If the reservoir were <br /> <br /> <br />to be supplied by the Hydraulic Ditch, wintertime operation would present <br /> <br /> <br />the problem of keeping 1 mile of ditch free of ice. In addition, the <br /> <br /> <br />reservoir could not be filled by gravity from the Hydraulic Ditch but water <br /> <br />~I <br /> <br />JI <br /> <br />-I <br /> <br />4-3 <br />