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<br />3. Construct a recharge pond filled using a recharge well: <br /> <br />This alternative would consist of drilling one well used to <br />pump water into a recharge pond. This system, as used on the <br />Tamarack Ranch, pumps water during the winter months when <br />there is generally not a call on the river and places water <br />in a pond for re-timing to the river. The water from the <br />pond is returned to the river by underground percolation <br />which due to a time delayed effect causes the majority of <br />this water to show up in the river during the summer time. <br />This is the time when the Toyne farm has depletions that <br />need to be offset with augmentation water. The water <br />returned to the river during the winter also has potential <br />value for endangered species issues facing the State of <br />Colorado. The development of a recharge pond also provides <br />habitat for migratory waterfowl. The Toyne farm would also <br />drill a well for supplying augmentation water directly to <br />the river. This is a drought management tool currently being <br />used by GASP with approval from the State Engineer to help <br />provide augmentation water during the most severe drought <br />situations. The cost of this alternative is $115,000. <br /> <br />The Selected Project <br /> <br />Glenn Toyne plans to construct alternative #3. Features of this <br />alternative are as follows: <br /> <br />Drill one well for pumping water into a recharge pond. The <br />well would pump up to a maximum rate of 7.8 cfs. This would <br />produce up to 3500 acre feet annually from the well. The <br />well would be drilled within 100 feet of the South Platte <br />River. <br /> <br />The recharge pond will be placed on a location of the Toyne <br />farm currently not used for irrigated crops. The pond will <br />be located near a county road for easy accessibility. <br /> <br />Piping will be used to convey water from the well to the <br />recharge pond. Piping will be 15 inches in diameter. The <br />piping will be buried. <br /> <br />The augmentation well would be drilled away from the river <br />and would utilize "in reverse" the piping described above. <br />The augmentation well would never be in use when the <br />recharge wells were needed. <br /> <br />The general locations of these features are shown in Appendix B. <br /> <br />Feasibility Study <br />Glenn Toyne <br />Recharge Project <br />February 2003 <br /> <br />7 <br />