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WSP00139
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Last modified
1/26/2010 12:12:57 PM
Creation date
10/11/2006 9:32:43 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8443.600
Description
Narrows Unit - Studies
State
CO
Basin
South Platte
Water Division
1
Date
2/1/1978
Author
US DoI BoR
Title
Special Report Investigation of Review Issues Narrows Unit - Colorado Pick-Sloan Missouri Basin Program
Water Supply Pro - Doc Type
Report/Study
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<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 th.e Narrows Unit. . <br /> <br />Ground-Water Recharge Alternative <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 /> <br /> <br />OTHER ITEMS <br /> <br />Relocation <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 woul d 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 />famiHes that have been established in the area for longer periods, <br /> <br />3 <br />
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