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<br />V-Ij <br /> <br />: <br /> <br />, <br /> <br />Willow Creek is essentially the entire existing supply and is the only eco- <br />nomically feasible initial source. <br /> <br />Groundwater. Through previous investigations and cost analysis, there is <br /> <br /> <br />no doubt that groundwater, when available and of good quality, has the fol- <br /> <br /> <br />lowing advantages over, sur'face water: <br /> <br /> <br />1. Normally, the only treatment required for groundwater would <br /> <br /> <br />be chlorination, whereas surface water requires at least fi 1- <br /> <br /> <br />tration and chlorinatio~. <br /> <br /> <br />2. Maintenance and operati~g costs for producing groundwater are <br /> <br /> <br />generally less than for surface water. <br /> <br /> <br />3. Groundwater is warmer t~an surface water in the winter time <br /> <br /> <br />thereby greatly reducing potential freezing problems. <br /> <br /> <br />4. The water quality of ground water is more stable than that of <br /> <br /> <br />surface flows and is not affected by day-to-day stream quality <br /> <br /> <br />changes, some of which ~ight be construction upstream, muddy <br /> <br /> <br />water due to storms, variable discharges from upstream sewage <br /> <br /> <br />plants, floating debris, and other items. <br /> <br /> <br />5. The initial cost is usual)y less than for a surface water col- <br /> <br /> <br />lection and filtration system. <br /> <br /> <br />6. The groundwater supply (an be more dependable than surface water <br /> <br /> <br />sources, especially during periods of low stream flow as wells <br /> <br /> <br />can draw upon water stored in buried sand and gravel layers. In <br /> <br /> <br />addition, maximum dependability can be achieved by having two or <br /> <br /> <br />more energy sources for pumping, such as electricity and natural <br /> <br /> <br />gas. <br /> <br /> <br />7. Wells can be constructed to practically el iminate vandalism prob- <br /> <br /> <br />lems which surface supplY diversions can have. <br /> <br />A preliminary surface and record geological investigation was made of the general <br /> <br /> <br />Allenspark area, and in particular, the Willow Creek alluvium. From this, it is <br /> <br /> <br />our opinion that large capacity wells, capable of supplying the entire demand, are <br /> <br /> <br />not obtainable. It is recommended that one or two wells be installed initially. <br /> <br /> <br />These would supplement direct diversions, and would be particularly valuable in <br /> <br />, <br /> <br />: <br />