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_ - - " - - . ~~tw.a +~.~ s ~ Forest Service: About.. 11~ay,* 1957 the Bureau expects to Iet a. ' contract for a diversion. tunnel.;. Following completion of a definite 5 :: plan report,: the prime contract-,.for the dam and power plant. will ~•-` ~' be awarded in the- fall of 1957. - ~s~; k 3. Navajo Unit- - - ~ ~" -:-w - ~_~ ~4, i. .. _ . _. '_ The Navajo Dam wi'Il-b~ located ur: northwestern New l~Zexico- ~ '_ on the- San Juan River, 34 miles east. of Farmington, and.31~~~, miles _ do ~cnstream from the confluence of Los Pinos -and San Juan Rivers.- The dam will be of rolled. earth-fill embankment. type.. The original .: plan. included .a reservoir- with a capacity of Y,450,000 acre-feet. fix' _ :1~Iore recent studies, however,"indicate a reservoir size of 1,700,000 acre-feet with an active capacity of 960,000 acre-feet. ,After a joint:., ;study of the optimum capacity of the reservoir by the State of New ..a ~Sexico and the Bureau of Reclamation, the- Interstate Stream .`~ '" Commission of the State recommended that a 1,700,000 acre-foot reservoir be constructed. Sediment accumulation in the reservoir ~ti will- be heavy and -will amount to 330,000- acre-feet over a 100-year ` " period, much of the sediment being. deposited in the inactive section of the reservoir;. This reservoir will be used to regulate the. , ~ilows of the San Juan River for the potential Navajo Irrigation Project near Farmington, the San Juan-Chama Project on the "'=. ',eastern side of the mountains, and perhaps for the small authorized•ri Hammond Project.. A part. of the water made available to the _ .Navajo Irrigation Project also may be used for ,industrial and , municipal purposes. A small amount of flood protection to down- - ~tream developments and some recreational facilities will also be _ provided, Construction Activities ~^"~ Eight hundred thousand dollars werev earmarked in the ~ppro- _ - "priations- Act for 1957-for the start of construction on Navajo Dam:. "~ ' Engineering and geologic investigations are being undertaken as _. ,.a basis for final designs and specifications. Temporary headquarters ~ ~ y have been. established at Farmington,. New ;4iexico= to,: complete ~ - preconstruetion -investigations and to administer a= construction contract for an access road. - _ ~~ _;. .. 4~ Curecanti LTnit -~ The Curecanti Storage 1• nit will be located on the Gunnison _ ° Ricer in western Colorado,.- upstream from the Black.. Canpon ~ E .~ ._ ._ - ~*f~'~rv 4 .Q ~+ ~'~ ~