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Show [5] involve extensive drainage of irrigated and irrigable lands on the reservation; the probabilities of recurring damages from large floods; and the diminution of the potential capacity of the proposed Indian Service power plant at its present Headgate Rock Diversion Dam, possibly to the point of rendering that development infeasible. 10. Two of the other plans investigated, namely, the East Side Canal and the West Side Canal, would also obviate the adverse effects of a weir or dam in the river, but both of these alternatives would be much more expensive. The West Side Canal, because of the extreme irregularities of the terrain, is the most costly of the several alternative solutions. The annual cost of supplying water to the Palo Verde Valley through the East Side Canal, based upon a 40-year period of repayment without interest, would be approximately three times the annual cost of the pumping plant. However, the annual cost of the East Side Canal is approximately $80,000 less than that estimated for a permanent diversion dam at the Palo Verde heading. This figure does not take into account the costs of offsetting the adverse effects that a permanent dam at this point would have upon the Colorado River Reservation. 11. The temporary weir is a loose rock fill, dumped on the river bed, without there having been any preparation of the foundation. Because of the nature of the structure, there can be no guarantee of permanence of service to the District. The flood-expectancy is such that there can be no assurances of dam stability, and a failure during a critical period would result in a crop loss running into several millions of dollars. It also should be pointed out that no congressional or other authority, including that exercised by the War Department over navigable |
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Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : |