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<br />Table 4. - Cost-effectiveness for Reclamation salinity control projects <br /> <br />Unit Primary features <br /> <br />Cost-effectiveness <br />in dollars <br />per mg/L <br />(1981) <br /> <br />Salinity <br />reduction at <br />Imperial Dam <br />(mq/L) Y <br /> <br />Tons of salt <br />removed <br /> <br />$100,000-250,000 <br /> <br />*644,000 <br />560,000 <br /> <br />96,000-107,000 <br /> <br />1,480,000 <br /> <br />180,000 <br /> <br />24,000 <br />280,000 <br /> <br />71 , 000 <br /> <br />103,000 <br /> <br />Paradox Valley Deep well inject ion <br /> <br />Grand Valley (Stage I) Canal/lateral lining <br />(overall) <br /> <br />Las Vegas Wash Bypass channel s <br /> <br />LaVerkin Springs Desalting/ponds <br /> <br />18 <br /> <br />2.5 <br />27 <br /> <br />6.2 <br /> <br />2/ 8.4 <br /> <br />Lower Gunnison Basin <br /> <br />I-' <br />ex> <br /> <br />Uinta Basin <br />McE1mo Creek Basin <br /> <br />Palo Verde Irrigation <br />District (10 percent <br />of area) <br /> <br />G1enwood-Dotsero <br />Spr i ng s <br /> <br />Big Sandy River <br /> <br />Saline water use <br />and di sposal <br />opportunities 1/ <br /> <br />Canal/lateral lining <br />Recommended plan <br /> <br />Selective canal/lateral lining <br /> <br />Combining canals/selective <br />lining <br /> <br />Lateral lining + onfarm + IMS <br />(joint project with SCS) <br /> <br />762,000 <br /> <br />900,900 <br /> <br />769,000 <br /> <br />14 <br /> <br />2.4 <br /> <br />2.4 <br /> <br />141,000 <br /> <br />24,000 <br /> <br />24,000 <br /> <br />8 <br /> <br />i/ 67,400 <br /> <br />281,000 <br /> <br />Collection/evaporation ponds <br />(preferred plan) <br /> <br />Industrial use <br /> <br />314,000 <br /> <br />852,000 <br /> <br />31 <br /> <br />668,000 <br />520,000-880,000 <br />1,850,000-5,130,000 <br />240,000-518,000 <br /> <br />8 <br /> <br />84 <br />77 -194 <br />15-50 <br /> <br />75,000 <br />878,000 <br />768,000-1,975,000 <br />351,000-531,000 <br /> <br />Local use for energy development <br />Long distance export disposal <br />Coal slurry pipeline <br /> <br />* The $644,000 is the latest cost-effectiveness figure available and is different than presented on page 43. <br />l/ All concentration reductions were calculated using CRSS projected 2010 flow and salt load conditions. The concen- <br />tratin9 effect of water depletion was not considered in this calculation. <br />~/ Annual equivalent value of salinity reduction. The ultimate value after a 22-year buildup period would be 11 mg/L. <br />3/ Early appraisal or inventory estimates. <br />!/ Tons of salt removed would decrease to 50,200 by 2010 and an associated mg/L of 6. <br />