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<br />A Fish and wildlife Coordination Act report has been prepared and a <br />mitigation plan has been formulated to compensate for the loss of wildlife <br />habitat due to the canal and lateral lining program. If adopted, the mitiga- <br />tion plan would consist of the purchase of 2,100 acres of riparian habitat <br />along the Uncompahgre River at a cost of $4,750,000. Mitigation costs are <br />included in the estimated construction costs for the project. <br /> <br />Total construction costs, including mitigation, are estimated at <br />$136.7 million on the basis of January 1981 prices. This results in an <br />annual cost of about $685,000 for each mg/L of salinity reduction at Imperial <br />Dam. <br /> <br />Following transmittal of the feasibility'report to Congress and authori- <br />zation of the unit for construction, advance planning will begin. Costs and <br />designs will be refined and operation and maintenance contracts will be nego- <br />tiated and signed with the Uncompahgre Valley Water Users Association. <br /> <br />Assuming Congress authorizes construction of the unit in 1984, construc- <br />tion of the unit is expected to begin in 1987. Monitoring of system salt <br />loads would continue throughout advance planning and during and after con- <br />struction to determine effectiveness of the plan. <br /> <br />The following table summarizes the recommended plan for the Lower <br />Gunnison Basin Unit investigations. <br /> <br />EFFECTS ON THE COLORADO RIVER (average annual) <br /> <br />Decrease in salt load (tons) <br />Reduction in salt concentration at Imperial Dam <br /> <br />140,470 <br />15.2 <br /> <br />PROJECT FEATURES <br /> <br />Canals to be lined (miles) <br />Laterals to be improved (miles) <br /> <br />59 <br />195 <br /> <br />ESTIMATED COSTS <br /> <br />Construction costs (January 1981 prices) <br />Canal lining and improvement <br />Lateral improvement <br />wildlife plan <br />Winter water replacement <br />Total <br />Interest during construction <br />Less costs of investigations prior to <br />authorization <br />Total investment for economic analysis <br />Annual equivalent costs (50 years at 7-3/8 percent) <br />Construction costs <br />Operation, maintenance, and replacement costs <br />(incremental) <br />Total <br />Cost per mg/L of salinity reduction at Imperial Dam <br /> <br />$63,350,000 <br />68,600,000 <br />4,750,000 <br />1,100,000 <br />137,800,000 <br />1,785,000 <br /> <br />-2,460,000 <br />137,125,000 <br /> <br />10,410,000 <br /> <br />o <br />10,410,000 <br />685,000 <br /> <br />rnt71G <br /> <br />ii <br />