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<br />Executive Summary <br />DEIS - Navajo Reservoir Operations <br /> <br />5-23 <br /> <br /> <br />Table 5-5-Summary comparison of alternatives retained for further analysis (continued) <br /> <br />" <br /> <br /> 250/5000 (Flow 500/5000 Alternative <br /> Recommendations) <br />Resource No Acfion Alternative Alternative <br />Diversion structures Existing diversions Some existing diversions Some existing diversions <br /> protected by flood need additional need additional <br /> control operations and operation and operation and <br /> 500 cfs minimum maintenance to handle maintenance to handle <br /> releases from dam. high spring releases and high spring releases. <br /> lower summer <br /> minimums. <br />River water quality Existing conditions Dilution of pollutants Similar to existing <br /> continue or improve due reduced when minimum conditions although dry <br /> to water treatment and releases occurring; year shortages may lead <br /> erosion control additional dilution during to increased water <br /> advances. high releases. Improved quality issues. Improved <br /> channel maintenance. channel maintenance. <br />Reservoir water quality Existing conditions Existing conditions Existing conditions <br /> continue continue continue <br />Socioeconomics Adverse impacts occur Adverse impacts on trout Economic benefits <br /> as water development, fishery economy and associated with water <br /> including completion of hydropower; economic development occur, <br /> NIIP and ALP, is benefits associated with although reduced due to <br /> detrimentally affected. water development water shortages. <br /> Recreation economy occur. Recreation economy <br /> maintained. maintained. <br />Special Status species Flow recommendations Flow recommendations Flow recommendations <br /> to conserve endangered to conserve endangered to conserve endangered <br /> fish not met; no fish met; no significant fish partially met; no <br /> significant effect on effect on other significant effect on other <br /> other endangered endangered species. endangered species. <br /> species. <br />River vegetation and Minimal impacts to Adverse impacts to Inconsequential effects <br />wildlife downstream from riparian vegetation vegetation and on existing riparian <br />dam recruitment due to associated wildlife vegetation and <br /> reduced spring releases. habitat along first 7 miles associated wildlife <br /> Inconsequential effects of river downstream from habitat. High spring <br /> on existing riparian dam due to lower releases may benefit <br /> vegetation and minimum flows; high cottonwood regeneration <br /> associated wildlife spring releases may and reduce human <br /> habitat. benefit cottonwood encroachment into <br /> regeneration and reduce riparian areas. <br /> human encroachment <br /> into riparian areas. <br /> <br />00583 <br />