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<br /> Table l. Economic Impact of a Winter Grazing System and Livestock Removal '-1f~"" <br /> t./"' <br /> -. '-' <br /> on Salinity from Highly Saline Lands in the Upper Colorado River Basin. <br /> Benefits] Costs <br />Treatment Salt Total Water Total Salinity Cost- <br />Practice Sediment Salt Concentration Annual Forage Retained Annual Effectiveness4 <br />(3 million Reduced Reduced Change Benefits2 Reduced On-Site Costs3 ($/mg/l/yr) <br />acres) (tons/yr) (tons/yr) (mg/l/yr) (AUMs/yr) (ac-ft/yr) <br />Livestock <br />Removals 2,468,~98 89,437 -6.86 4,594,000 95,024 12,206 985,000 143,600 <br />Winter <br />Grazing6 2,221,738 80,493 -6.21 4,150,000 20,5007 10,985 1,888,000 304,000 <br /> <br />~ <br />~ <br /> <br />] Benefits are based on the following baseline data taken from BLM (3), Appendix XII-2, and (22), all indexed to <br />1979 dollars: <br />a) Value of a reduction of 1 mg/l at Imperial Dam = $425,000; <br />b) Value of keeping 1 ton of sediment out of Lake Powell = $0.68; <br />c) The buildup factor (present worth of one for a project life of 50 years) = 14.77. <br /> <br />2 Total Annual Benefits is the sum of annual benefits from reduced sediment in Lake Powell and reduced salt con- <br />centrations in water measured at Imperial Dam. Based on data taken from Appendix XII-2 of BLM (3), pages 2-3. <br /> <br />3 Total Annual Costs for the Livestock Removal Treatment Practice is the sum of annual costs associated with water <br />lost to downstream users by keeping water on-site, BLM maintenance costs (exclusion fences, trespass control), <br />the loss of grazing fees to BLM when grazing is reduced, and the loss of income to the rancher. Total Annual Costs <br />for the Winter Grazing Treatment are the cost of grazing management including physical improvements (fences, watering <br />facilities, roads, etc.), maintenance, and operation; and the cost of water kept on-site. Based on data taken from <br />Appendix XII-2 of BLM (3), pages 2-4 and 5. <br /> <br />4 See page 19 for a discussion of cost-effectiveness. <br /> <br />S Based on data taken from Table VII-2, BLM (3). <br /> <br />6 Values for sediment and salt reduced in this Treatment Practice are computed as a 10 percent decrease over those <br />computed for the livestock Removal Treatment Practice. <br /> <br />7 Figure taken from Grazing Management value in Table VIl-2, BLM (3). <br /> <br />, c;,:';.,',,_ ," ' <br />