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<br />li. <br />co <br />r;t) <br />N <br />( <br />C'. <br /> <br />Table 3 <br /> <br />Tucson Aqueduct-Phase B <br />Estimated Biological Impacts, Mitigation, and Residual Impacts <br />(All Costs are in Thousands of Oollars - January 1982 Price levels) <br /> <br />East Side <br /> <br />West Side <br /> <br />Migration Disruption Before Mitigation <br />Mitigation (No. of crossings) <br />Cost ($80 each) <br />Residual Impact After Mitigation <br /> <br />Moderate1/ <br />15= <br />$1,200 <br />Low <br /> <br />High1/ <br />29= <br />$2,320 <br />Moderate <br /> <br />Wildlife Drowning Hazard Before <br />Mitigation <br />Mitigation (Miles of Fence) <br />Cost <br />Mitigation (No. of Water Sites) <br />Cost ($15 each) <br />Residual Impact After Mitigation <br /> <br />Moderate <br />5JJ/ <br />$722~/ <br />l7E.! <br />$255 <br />Low <br /> <br />High <br />7aJ:/ <br />2/ <br />$1,069j/ <br />2~ <br />$375 <br />Low <br /> <br />Special Status4~pecies Before Mitigation <br />Gila Monster- 4/ Moderate High <br />Desert Tortoise- Moderate1/ High1/ <br />Mitigation (Miles of Barrier) 53 Mi- 78 Mi- <br />Cost 5/ $861 $1,273 <br />Kit Fox- High 3/ High <br />Mitigation - - - - -Telemetry Studies- - - - - - <br />Cost $25 $25 <br />Residual Impact to Special Status Low Low <br />Species After Mitigation <br /> <br />Total Mitigation Cost <br />Impacts to Thornber's Cactus~/ <br /> <br />$3,063 <br /> <br />$5,062 <br /> <br />Probably not <br />significant <br /> <br />Possibly <br />significant <br /> <br />1/ Extent of need not yet determined. These mitigation measures are the <br />subject of an ongoing study by the Arizona Game and Fish Department (AGFD), <br />For planning purposes, the number of crossings, water sites, and fencing is <br />based on a level of mitigation similar to that used in similar situations <br />along portions of Tucson Aqueduct-Phase A. <br /> <br />2/ An additional two feet of fence for mitigation purposes added to a seven <br />foot security fence. <br /> <br />3/ Preliminary recommendations from AGFD study. <br /> <br />1/ Listed in Threatened and Unique Wildlife of Arizona, Arizona Game and Fish <br />Commission, 1981. <br /> <br />~/ Endangered and Unique Wildlife of the Southwest National Forests. U.S.O.A. <br />Forest Service, 1975, page 203. <br /> <br />&/ Mitigation not yet determined. <br /> <br />14 <br />