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<br />ro <br />w <br />CJl <br />o <br /> <br />Big Sandy unit. Table 11-1 below shows the salt load reductions and salinity <br />concentration reduction impacts at Imperial Dam for the same four projects. <br /> <br />Table II-l - salinity Control Impacts at Imperial Dam <br />for Recommended Plan <br /> <br />I <br />, , <br /> <br />Irrigation Unit <br />Area <br /> <br />Salt Load <br />Reduction <br />(Tons) <br /> <br />Reduced Salinity <br />Concentration <br />(mg/l) <br /> <br />13 <br />10 <br />2 <br />35 <br /> <br />Grand Valley (CO) <br />Uinta Basin (UT) <br />Moapa valley (NV) <br />Lower Gunnison (CO) <br /> <br />130,000 <br />76,000 <br />19,000 <br />335,000 <br /> <br />These reductions provide significant water quality benefits based upon <br />$469,000 average annual downstream damages for each mg/l increase in <br />salinity. <br /> <br />The major benefits from the Colorado River Basin Salinity control Program <br />are national and regional in scope. The national need is to maintain the <br />salinity differential in the Colorado River water delivered to Mexico in' <br />accordance with the 1973 agreement (Minute No. 242 of the,International <br />Boundary and Water commission, United states and Mexico). The regional ,need <br />is to maintain current ,salinity levels in ,Colorado River water withdrawn for <br />downstream use while allowing the 'Upper Basin to further develop its compact- <br />apportioned waters. <br /> <br />B <br />