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~PQ604' . .. . . , delivering 5,300 acre-feet of salvaged water annually to the existing Alamosa National Wildlife Refuge and construction of the Mishak Lakes National Wildlife Refuge to mitigate wildlife habitat damages resulting from construetion and operation of the Closed Basin Division. The plan also provides for construction of minimum recreation facilities at the San Luis Lakes, and includes provisions to maintain the lake at a near constant level which is acceptable for recreation purposes. Project benefits are based on the value of salvaged water in the Rio Grande Basin. Additional benefits accrue to recreation and fish and wildlife and an assignment for area redevelopment. Presently the physical works for construction as a part of the Closed Basin Division are based On feasibility level studies completed in the early 1960's and presented in House Document 91-369. That document recognizes that the physical design of water salvage facilities is based on preliminary and minimum information. Only five pumping tests were performed to estimate aquifer characteristics. The water salvage system was designed on the basis of this minimal testing program. In addition, very little field investigation was performed concerning the location and design of the conveyance and lateral systems. The Bureau of Reclama- tion recognizes that feasibility report information is not adequate for final designs. The sole purpose of the feasibility report is to determine economic feasibility and no effort is made to develop design grade information. 2