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<br />, 164~; <br /> <br />occupying the same wet meadow habitat and sandbar roosting site as <br />sandhill cranes. Insofar as whooping cranes utilize these two habitat <br />components, no adverse impact is anticipated upon these species as a <br />result of the Narrows Unit. <br /> <br />,- <br /> <br />Ground-Water Recharge Alternative <br /> <br />" <br /> <br />The analysis has shown that recharge of the ground-water aquifer in <br />certain areas of the South Platte River Valley is physically possible. <br />The cost of developing an extensive recharge system is considerably <br />higher than the Narrows Unit Dam and Reservoir on an annual per acre- <br />foot of water delivered to the farm. Minor recharge efforts using the <br />existing canal systems could be implemented at a lower cost. However, <br />such efforts would not duplicate the water service capability of the <br />Narrows Unit within the service area. The annual energy required to <br />recover the recharged water is estimated to be 5,700,000 kilowatt-hours <br />(equivalent to 3,350 barrels of oil annually). <br /> <br />The ground-water recharge alternative examined during this study is <br />not economically justified with a direct benefit cost ratio of 0.82 <br />at the current interest rate. In addition, this alternative would <br />serve only the single purpose of irrigation and would provide only <br />about 58 percent of the water supply to irrigation that could be <br />provided by the multiple-purpose Narrows Unit. It would not meet <br />any of the flood control, recreation, or fish and wildlife needs that <br />would be met by the construction of Narrows Dam and Reservoir. <br /> <br />OTHER ITEMS <br /> <br />Relocation <br /> <br />. <br /> <br />The results of a relocation survey conducted in January 1977 indicate <br />that the social and economic impacts on families which would be relocated <br />by the Narrows Unit may be less than was estimated in the environmental <br />statement. The survey reveals that of the 642 persons who would be <br />relocated, 41 percent or 262 persons are tenants. Approximately 43 <br />percent of the owner/occupants and 82 percent of the tenants have <br />occupied their homes less than 10 years. The impact of moving should <br />be less severe for these more mobile families than it would be for <br />families that have been established in the area for longer periods. <br /> <br />3 <br />