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003150 ~ CHAPl'ER I PlANS OF DEVELOl'MENT A main canal for each of the three sizes of project, consisting of a series of tunnels, siphons, and open-earth and concrete-lined canals, would head at the reservoir and extend west along the south side of the rivp.r to TIroject lands located in the Navajo Indian Reser- vation. Pertinent Qa~a. pertaining to the maiIl canal are sUDlllJl3,rized in the following table. Table V SHIPROCK PROJECT MAIN CANAL DATA Earth unlined Concrete - Shiprock Diversion and clay- lined Total project CapiCit) lined canals canal Tunnel Siphon length acrea (c.f.s. (miles) (miles) . (miles (miles) (miles) 100,000 1,215 48.77 15.62 14.17 14.76 93.32 113,900 1,535 48.99 15.64 13.98 14.76 93.37 121,700 1,715 48.90 15.76 14.50 14.71 93.87 . The general location of the potential Shiprock project and of possible extensions of it to include the 67, 700-acre or 57, OOO-acre South San .1uan project under plans D-l, D-2, D-3, E-l, E-2, and E':;3 are shown on Drawing No. 524-406-97 on page 11. Extensions for a 20,450-acre South San Juan project under plans D-4, D-5, D-6, E-4, E~5, and E-6 are shown on Drawing No. 524-406-98 on pige 15. Plan D-l . Under plan D-l, 67,700 acres of land would be irrigated in the South San Juan project area, including 28,800 acres in the Navajo Indian Reservation but outside the Shiprock project area. The Navajo Reser- voir, in order to serve both projects, would be constructed to a capac- ity of 1,917,000 acre-feet including an active capacity of 740,000 acre- feet. The joint Main Gravity Canal from Navajo Lam to a hydraulic- turbine-driven pumping plant would be constructed approximately 268 feet higher than the canal planned for the 100,000-acre Shiprock proj- ect alone and would have a capacity of 2,630 second-feet and a length of 28 miles. This section of the canal would serve by gravity 1,760 . acres of South San Juan project lands on Pauline Mesa but it would not be practicable to release water down the steep incline to the scattered tracts of land shown on the map near the mouth of largo and Munoz Canyons. The water remaining for both projects at the end of the joint Main Gravity Canal on the east side of Kutz Canyon would drop 243 feet through a pen- stock to hydraulic-turbine-driven pumps. At the pumps the water would separate into three flows. That for the Shiprock project would provide pumping power and then continue by gravity flow in the Shiprock project canal, and that for the South San Juan project would be pumped through 7 ;. -'>:.