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<br />method of delivering existing raw water supplies to the Carter Lake Filter Plant. <br /> <br />The Districts initially planned to construct a 5,200 acre-foot reservoir with the vision that it <br />could be enlarged of a future date. Several reasons arose following the original feasibility study and <br />during design that influenced the Districts decision to construct the larger reservoir. These reasons <br />are listed as follows: <br /> <br />1. As the original feasibility study was completed the area was experiencing drought <br />conditions and it became evident that if the Districts had to contend with a long-term <br />drought, a smaller reservoir may not be adequate. <br /> <br />2. Landowners were concerned that the Districts might enlarge the dam in the future <br />and want to purchase or condemn their remaining property. <br /> <br />3. The Districts believed that constructing the larger reservoir made sense from both a <br />funding and timing perspective. <br /> <br />4. The embankment material to construct the larger dam would have been inundated by <br />the smaller reservoir, hindering future enlargement. The reservoir would have to be <br />drained or lowered for an extended period of time to accommodate the construction <br />of the enlargement. The enlargement construction would hinder the Districts' ability <br />to treat water. <br /> <br />5. Permitting the larger reservoir would prevent the Districts from being exposed to <br />changing future permitting requirements. <br /> <br />The Districts reviewed costs between reservoir sizes on an acre-foot basis and ultimately <br />decided to construct the larger reservoir during the final design phase in May 2004. The total project <br />cost for the smaller reservoir was estimated at $18,500,000 compared with the larger reservoir <br />estimated at $21,500,000. At this point it was also evident that the original 5,200 acre-foot reservoir <br />would actually only provide approximately 4,800 acre-feet of storage due to new topography and <br />final danl and facilities layout. <br />The $18,500,000 cost of the smaller reservoir is significantly higher than the $10,470,000 <br />presented in the original feasibility study for the following reasons: 1) it includes an oversized outlet <br />works and wider dam crest to accommodate a future raise; 2) land acquisition costs are <br /> <br />Dry Creek Reservoir Project <br /> <br />2 <br /> <br />ElCJ'rILE <br />