Laserfiche WebLink
<br />. <br /> <br />SUMMARY (Continued) <br /> <br />Summary comparison of the environmental <br /> <br />Peak employment <br />increase (Jabal <br />1/ Provided the Wright fishhook cactus can be avoided. <br />21 The formula used for estilllsting the mean annual salinity reduction in mg/L at Imperial Dam Is presented in <br />Quality of Water. Colorado River Basin, Pregrau Report No. 12 (U.S. DepartMent of the Interior, January 1985) and is <br />based on the level of development anticipated to occur by the year 2010. Based on this formula, the salinity at Imperial <br />Dam decreases 0.91 mg/L for each 10,000 tODa of sslt removed and increasBa 1.07 mg/L for each 10,000 acre-feet of deple- <br />tion upstream of Imperial Dam. <br />3/ Maximum annual range of salinity illlpact at Imperial Dam based on equations developed <br />Simulation System (eRSS) COlllputer model developed by the Bureau of Reclalll8tion. The range of <br />certainty of the hydrosalinity analysis as well as a wide range of hydrologic and development <br />annual range represents the widest variation in salinity impacts ponible by a project in any <br />average impact would fall approximately midway between these extremes. <br /> <br />Concerns <br />Riparian habitat <br /> <br />Upland habitat <br /> <br />Aquatic resources <br /> <br />Threatened and <br />endanltered species <br />Cultural resources <br /> <br />Visual resources <br /> <br />. <br /> <br />Water resources <br /> <br />Air quality <br /> <br />Scenery <br /> <br />. <br /> <br />Hanksville <br />Salt \lash <br />4.5 miles of stream de- <br />watered, some loss of <br />riparian habitat. <br />15 acres at well site and <br />2,725 feet of pipe. <br />5.6 miles of road upgraded <br />or constructed. <br />Minor effects to limited <br />aquatic life, insignificant <br />effect to Huddy Creek and <br />Dirty Devil River; 2.5 cta <br />reduction io flow <br />No effect.~-' <br /> <br />No site located <br /> <br />Powerline cOlllpstible with <br />scenic aress. <br />I~roved quality, 14,300 <br />tons of salt relllOved. <br />Flow depletion of 2.5 cfs. <br /> <br />Short-term during con- <br />struction. <br />Restricted to eut side of <br />aCCe88 road. 13.2 miles of <br />powerline. <br />16 <br /> <br />Summary Table 2 <br />impacts of the recommended <br />Rec01llllleoded plan <br />Emery South <br />Salt \lash <br />No effect <br /> <br />10 acres at well site <br />and 7,200 feet of pipe. <br />8.4 milea of road up- <br />ltrsded or conatructed. <br />0.25 cfs removed frolll <br />wash. <br /> <br />No effeCt.=.' <br /> <br />Four quarry sites to <br />be avoided. <br />Pow-erline cOlllpstible <br />with scenic areas. <br />Improved quality, <br />6,600 tona of salt <br />removed. Flow deple- <br />tion of 0.25 cfs. <br /> <br />Short-term during <br />construction. <br />12.4 miles of power- <br />line. <br /> <br />10 <br /> <br />S-lO <br /> <br />plan and the no action alternative <br /> <br />No sction <br />alterna- <br />tive <br />No effect <br /> <br />Total <br />Some loss of riparian <br />habitat. <br /> <br />25 acres of habitat and <br />9,925 feet of pipeline. <br />14 miles of road up- <br />ltraded or constructed. <br />Minor effect <br /> <br />No effect <br /> <br />No effect <br /> <br />No effect <br /> <br />No effect..!;.' <br /> <br />No effect <br /> <br />No effect <br /> <br />No effect <br /> <br />No effect <br /> <br />No effect <br /> <br />20,900 tons of salt re- <br />moved. Flow depletion <br />of 2.75 cis. Mean an- <br />nual sslinity reduction <br />at I'!'P.er1al Dam of 1.7 <br />mg/T..'3J with a maxtlllUm <br />annusl range of 0.8 to <br />2.3 mg/12/ in any 1 <br />year of operation. <br />Short-term effects. <br /> <br />No effect <br /> <br />No effect <br /> <br />Raptor safe. <br />25.6 miles of <br />11ne. <br /> <br />No effect <br /> <br />Total of <br />power- <br /> <br />26 <br /> <br />o <br /> <br />using the Colorado River <br />effects considers the un- <br />conditions. The IIl8ltiPlUm <br />1 year of operat1on. The <br /> <br />002318 <br />