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<br />- <br /> <br /> - <br /> ?- <br /> - <br /> 0 <br /> :a <br /> " <br /> " <br /> ... <br /> :>:l <br /> " <br /> ;:; <br /> - <br /> " <br /> ... <br /> ~ <br /> ... <br /> " <br /> .. <br /> ~ <br /> ;.. <br /> " <br /> - <br /> s. <br /> " <br /> '^ <br /> ,.., <br /> - <br /> v. <br /> tl <br /> ,.., <br /> - <br /> V. <br /> I <br /> - <br /> " <br /> " <br /> " <br /> " <br /> ~ <br /> N <br /> :5 <br />II N <br />Ii <br />!I <br />I <br /> <br />I <br />Ii <br /> <br />i <br />I; <br />II <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />~ <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />.- <br /> <br />- <br /> <br />- <br /> <br />.-. <br /> <br />.- <br /> <br />.- <br /> <br />.- <br /> <br />- <br /> <br />- <br /> <br />Table ES-l, Summary of Potential Impacts of the Execution of the lA, Adoption of the lOP, and Implementation of Biological <br />Conservation Measures (Page 4 of 29) <br /> <br />I Resoun:eflssLle No Acfion In/pads of Proposed Adion/Alternf/fives <br /> HYDROLOGy/WATER QUALITy/WATER SUPPLY <br /> Potential impacts to Colorado River flows from The potential elevation change from combined lOP <br /> inadvertent overruns (continued). and fA impacts is anticipated to be within the <br /> historic fluctuation and the fluctuation that would <br /> be seen under No Action. <br /> No Forgiveness Alternative: Similar to proposed <br /> lOr, except would have more extended payback <br /> periods which would result in lower flow a greater <br /> percentage of the time. <br /> Biological Conservation Measures <br /> The potential imDilcts to hydroloQ:Y resulting None. Potentially minor reduction in river flows. <br /> from the biological conservation measures. <br /> The potential impacts to wilter quality resulting None. Potential impacts. to water quality during <br /> from the biological conservation measures. construction activities. <br /> BIOLOGICAL RESOURCES-VEGETATION <br /> Implementation Ag..-eement <br /> Colorado River. Potential loss of vegetation No change to vegetation would occur. Drop in groundwater levels may impact ripanan <br /> from decreased water le....els (and associated and marsh vegetation with shallow roots, such as <br /> drop in groundwater level) of the Colorado cottonwood and willow trees. Full mitigation of <br /> River between Parker Dam and Imperial Dam. these impacts would be accomplished through <br /> implementation of the biological conservation <br /> measures. <br /> Imperiallrri~ation District. Potential loss of There is a potential for water conservatIOn Construction activities have the potential to cause <br /> native vegetation from construction and measures to be implemented in the 110 service area both temporary and permanent losses of native <br /> operation of water conservation measures. even if the IA were not implemented. This could vegetahon, depending on the exact location and <br /> result in impacts comparable to the proposed IA. extent of such activities. Conservation measures <br /> could result in il reduction of flow and chimges in <br /> water quality withm drilin water, which may reduce <br /> emergent marsh and riparian vegetation. <br /> <br />C' <br />" <br />2 <br />- <br />a. <br />" <br />!!' <br />~ <br />3 <br />" <br />~ <br /> <br />171 <br />'f' <br />...... <br />w <br />