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<br />TA8LE 1-2 SUMMARY OF CANDIDATE PLANS 61
<br />LOWER GUNNISON SALINITY CONTROL STIJDY, COLORADO
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<br /> Wetland Mitigation
<br /> Plan Description Action Total Net 51 Area Salt Average 2/ Area Area
<br /> Cost Benef it Treated Reduction Cost Disturbed Avoided
<br /> (----$1,000,000----) (acres) (1000 tons)($1000/mg/I) (acres) (acres)
<br /> 1. Continuation of Ongoing Onfsrm 2.5 0.41 3,400 10 213
<br /> Programs Mitigation 1.7 -0.21 840 370 37,030
<br /> Total 4.2 0.20 4,240 10 358 370 37,030
<br /> 2. Irrigation Water Hgmt. Oofarm 7.1 2.08 55,900 35 173
<br /> Minimum Level - Off-farm 11 0 0 0 0 0
<br /> Selected Areas Mitigation 3.4 -0.43 1,700 750 36,650
<br /> Total 10.5 1.65 57,600 35 256 750 36,650
<br /> 3. Oofarm Ditch Lining Oofarm 30.0 3.25 35,800 95 269
<br /> Minimum. Level - Off-farm ~I 16.6 1.20 45 314
<br /> Selected Areas Mitigation 6.1 -0.76 3,000 1,300 36,100
<br /> Total 52.7 3.69 38,800 140 321 1,300 36,100
<br /> 4. Irrigation Water Hgmt. Onfsrm 51.8 4.22 43,800 150 294
<br /> & Onfarm Ditch Lining Off-farm 21 26.4 0.64 55 409
<br /> Minimum. Level - Ki tlgatlon 1.8 -0.23 900 400 37,000
<br /> Selected Areas Total 80.0 4.63 44,700 205 332 400 37,000
<br /> 5. Irrigation Water Kg.t. !J Onfarm 68.6 5.70 41,400 190 308
<br />w & Onfarm Ditch Lining Off-fana 31 20.9 0.61 45 396
<br /> Maximum Level - Mitigation 14.6 -1.82 7,300 3,100 34,300
<br /> Selected Areas Total 104.1 4.49 48,700 235 377 3,100 34,300
<br /> 6. Irrigation Water Hgmt. Qnfarm 3/ 124.0 12.43 117,100 295 358
<br /> & Onfarm Ditch Lining Off-farm 21.5 0.53 45 407
<br /> Mixed Levels - Mitigation 27.4 -3.42 13,700 5,900 31,500
<br /> Selected Areas Total 172.9 9.54 130 ,800 340 433 5,900 31,500
<br /> 7. Irrigation Water Mgmt. Onfarm 3/ 139.7 10.23 169,000 300 397
<br /> & Onfarm Ditch Lining Off-farm 12.1 1.00 35 392
<br /> Mixed Levels-Yalleywide Mitigation 17 .6 -2.20 8,900 3,800 33,600
<br /> Total 169.4 9.03 177 ,900 335 431 3,800 33,600
<br /> 8. Irrigation Water Mgmt. Onfar1l. 3/ 291.2 2.81 169,000 370 670
<br /> & Onfarm Ditch Lining Off-far. 23.4 0.66 50 399
<br /> Maximum Level-Valleywide Mitigation 44.1 -5.50 22,000 41 13,200 24,200
<br /> Total 358.7 -2.03 191,000 420 727 13,200 24,200
<br /> 11 Off-farm ditch lining is not included with this program emphasizing onfana irrigation water aanagement only.
<br /> 21 These off-farm actions include lin1ng small and medium laterals included in maximum salt reduction analyses.
<br /> Ii A limited amount of off-farm ditch lining is included with maximum level onfarm improvements to assure proper
<br />~ operation of onfar... system improvements.
<br />41 Includes 18,300 acres of avoided habitat and 3,700 acres of new habitat development.
<br />n 51 Costs based on July 1980 price base, amortized at 7 3/8 percent interest over 25 years.
<br />':: 61 Benefits and costs were computed in present value terms using IO-year installation period.
<br />()3 !/ Onfarm benefits not included.
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