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. Ot' 0" ~5 J.......) ENGlIF To: The Secretary of the Army 1mlrovcre~nt program; (g) improvement of Indian Landsj and (h) other collat- eral imI'rov~menta. Detalb of the flood control pholliC of the plan and. related power development features are contained 1n the district enclneerla report and aTe outlined below. Detal1~ of other features of tho compre- hendvi!" plan are contained 1n reports prepared or under preparation by other a~encles havinS jurisdiction over the particular function. involved. Individual features of the comFrehenelve plan insofar 88 they are now developed consist of: Cham1ta, ChiClo, and Jemez Canyon Reservoirs and Rio Grande and Bluewater FloodwBY improvements, comprising the flood con- trol phase; irrigation improvements in the W-lddle p~o Grande Conservancy Dlotrlct including acquisition of and reconstruction and extension of existing project works} improvement of Indian lands and farming practicel; recreational, and filh and wildlife developments; and United ~tate8 Geo- logical Survey activities. The estimated cost of these features agRregatea t95,560,OOO and corresponding annual charges are eotimated at $4,742,000. Annual benefits for the varioue phases of improvement, 8S estimated by the respective agencies having jurisdiction, amply justify the comprehensive plan. 8. The flood control phase of the comprehensive plan provides for: Chiflo Dam and Reservoir at mile 445,on Rio Grande, with a storage capacity of 816,000 acre-feet (exclusive of possible bank storage); Charn1ta Dam and Reservoir on Rio Chams 5 miles above the mouth, with a storage capacity of 945,000 acre-feet; Jemez Canyon Dam and Reservoir on Jemez Creek 2 miles above the mouth, with a capacity of 120,000 acre-feet, including a levee and interior drainage provisions to protect the Santa Ana Indian rueblo at the upper end of the reservoir from flooding at maximUJ:l high water; Rio Grande Floodway, including channel rectifi~tion through Espanola and ~iddle Valleys to Elephant Butte Reservoir and belt:l'tl Elephant Butte Dam in the vicinity of Hot Springe, to provide a degraded and stabilized channel which would be adequate to carry regulated releasee from the reservoirs, and supplementary levee modification and construction to ass~e an efficient tlood.ay with adequate capacity to pass safely all uncontrolled flash- flood inflOlfls originating below the nood control reservoirs and to pre- vent damage at Hot Springs from spills at Elephant Butte Dam; and, Blue- water Flood.ay, including levees, diversion ~orks, and a diversion channel, to carry flood nows away from irrigated areas and into adjoining lava bede where they would percolate into porous rock. Provisions for the pos- sible future development of hydroelectric power are included in the plans for Chiflo and Chamita Dams. The storage capacities of the three reservoirs 1nclude adequate allowances for the retention of sediment for 50 yeare after construction. Estimated cost of the improvements included in the flood control phase of the comprehenflive plan, based on January 1, 1947, price levels, and corresponding annual charges are as follows: - 5 -