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:.?;~~ SUMMARY (Continued) Unit Miles Miles Unit alternatives Ex~st~ng No-act~on condition alternative o 0 43.9 11.6 Comparison of Uints Basin Category Length of canal lining Length of lateral lining Right-of-way needed Private land Ute Indian tribal land Forest Service lands Total Wildlife habitat gains or losses along canal~/ Wet land Riparian shrub-tree Desert shrub Irrigated lands Wildlife habitat--effect of wildlife mitigation plan Wet land Riparian shrub-tree Desert shrub Irrigated lands Total Conveyance system seepage Canal and lateral seepage Seepage reduction Salt loading~./ Total average salt lda~/ Salt load reductio~/ Mean annual range in salinity reduction at Imperial Dam Maximum annual range in salinity reduction at Imperial Da~/ Peak employment increase Project costs Capit!!l cost,Y Annual cost Annual equivalenLLI Operation. maintenance, and replacement increase Total annual cost Average cost effectiveness $/ton 1/ Does not include impacts of wildlife mitigation. 21 NA indicates not applicable. 31 Salt loading from 17 irrigation subaress included in the study. il Adjusted to account for the increase resulting from wildlife mitigation. 5/ Maximum annual range of salinity impact at Imperial Dam 8S predicted by the Colorado River Simulation System (eRSS) computer model developed by the Bureau of Reclamation. The range of maxi- mum annual reductions is greater than the range of mean annual reductions due to the wide range of hydrologic and development conditions evaluated. The maximum annual range represents the widest variation in salinity reduction possible by the unit in any 1 year of operation. The average im- pact would fall approximately midway between these extremes. 6/ January 1985 price level. Does not include cost of investigation prior to authorization. II. Computed using the fiscal year 1986 planning interest rate and a project life of 50 years. Recommended plan Acres Acres Ac res 15B 39 17 214 Acres Acres Acres Acres -353 -256 +384 +200 Acres Acres Acres Acres Acres o 61 566 o 627 o 61 566 o 627 250 3B 39 300 627 Ac. re-feet Ac re-feet 18.400 NAZi 18.400 o 1,600 16,800 Tons Tons 174,600 NA 174,600 o 149,100 21,000-30,000 mg/L 1.9-2.7 mg/L Jobs .9-3.9 70 $23,752,000 2.081,800 NA 165,100 2,246,900 BB UuC4 ,,\ .:. S-7