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<br />84 percent (122,000 acres) of the land that is potentially treatable. This <br />will result in a projected decrease in salinity of 10.3 milligrams per <br />liter at Imperial Dam on the Colorado River. The selected plan will also <br />benefit the agricultural economy of the Uintah Basin. No range or forest <br />land will be treated under the selected plan. There are no known <br />archeological and historical resources on, or eligible for, the National <br />Register of Historic Places that will be disturbed by installation of <br />measures identified in the selected plan. Impacts on local wildlife <br />habitat are expected. <br /> <br />Install ati on of the sel ected on-farm pl an is estimated to cost a total of <br />$52.4 million. To achieve the downstream benefits, local farmers will <br />require at least a 75 percent level of cost sharing in order to assure <br />implementation of the salinity control plan. This cost includes all needed <br />components of the irrigation systems. Landowners will furnish the <br />remaining 25 percent of construction cost plus annual operation, <br />maintenance, and replacement costs. Noncost-shared management practices <br />will be required as a condition for cost-share assistance for other <br />practices where such management practices are necessary to achieve the <br />salinity control objectives. An increase in SCS staff for technical <br />support win be required. <br /> <br />Wildlife enhancement practices will require a 90 percent Federal cost <br />sharing level for satisfactory participation. However, costs for these <br />improvements were not determined in this report. Impacts to wildlife <br />habitat were displayed as if no offsetting improvements to the habitat were <br />to take place. Installation of improvements for wildlife enhancement could <br />reduce the actual habitat losses considerably. <br /> <br />Monitoring of the water management systems and related resources affected <br />by the improvements will be continued by appropriate agencies and expanded <br />in selected areas to more accurately measure effects of installation of <br />this plan. <br /> <br />The following table shows a summary of significant effects for the <br />alternatives presented in this report. <br /> <br />,...; t - r t1 C' (i <br />i,.1 .} \. _1 oj ,) <br /> <br />2 <br /> <br />(Revised November 1980) <br /> <br />~ <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />