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(2) About 80 pump installations along the channel with capacities adequate to withdraw approximately 65,000 acre- feet from the ground water acquifer in the reaches outlined on the map. (3) Transmission lines and other facilities necessary to furnish power to the pumping installations. Reconnaissance estimates indicate that the contemplated water salvage plan woUld involve capital costs in the amount of about $1,700,000 together with operation, maintenance, and replacement costs of about $100,000 annually. On the assumption of salvage of 65,000 ac:ce-feet of water comply:ing with Compact requirements and repayment of the capital costs over a 4o-year period, the average annual cost would be less than $:2.50 per acre-foot of water salvaged. The value of the water salvaged would greatly exceed this estimated cost. It is considered that, as the result of the protracted drought conditions of the recent years, ground water conditions in the Closed J;lasin are as unfavorable from the s~andpo:ints of both quality and quantity as may be reasonably forecast. Also, it is considered probable that operation of the water salvage channel would improve the quality of ground waters tributary to it by leaching of salts from the soil. Con- sequently, it is considered that if pend:ing investigations should estab- lish that under present conditions water of suitable quality can be salvaged, there is little likelihood of subsequent deterioration of quality of water and failure of salvaged water to meet Compact requirements. However, the contemplated plan is considered sufficiently flexible to meet any foreseeable condition. Should the quality of water in any portion of the basin become less suitable, selective operation of the pumps would permit withdrawal of water from only the favorable ground water areas to the extent required to insure that the pumped waters comply with Compact requirements. Similarly, should continued operation of the water salvage channel result :in extensive improvement of the quality of water through- out the bas:in or favorable inflow to the sump occur, salvage of addit ional amounts of water could be accomplished by the installation of additional pumps and m:inor alterations to the water salvage channel. It is considered that further :investigations estimated to cost about $50,000 will be required to establish the feasibility of the proposed plan of water salvage to the extent required for Congressional authorization of construction of the w!3.ter salvage channel and related features. Such investigations would include drilling of additional water sampling holes, pump tests :in eight selected areas; accomplishment of related hydrologic, geologic, engineering and economic studies, and preparation of a report summarizing all investigations on which the final plan of development would be based. Under established procedures, upon completion of the report, it would be submitted to the concerned local intere sts, the State, and other Federal agencies for informal field level connnents prior to transmittal through appropriate channels for use in achieving Congressional authorization of the contemplated works. A.t appropriate t:ime s during the 3 r - ...../. -~' ;.., ,~ ".. ...... :.i '- Li