| Summary: | Alternate surface diversion routes for the Central Arizona Project aqueduct are presented, extending from 1) Lake Powell, 2) the proposed Marble Canyon Reservoir, 3) the proposed Hualapai (Bridge Canyon) Reservoir, and 4) Lake Mead to a common terminus at Granite Reef Dam on the Salt River. The routes are compared with each other and with the proposed Granite Reef Aqueduct. Estimated capital costs, operation and maintenance charges, and power costs/revenues are analyzed in yearly cash flows. A most economical route Is chosen by the criterion of least annual cost. Non-quantifiable benefits and costs are examined when they tend to alter the choice of a most feasible route. Under all of the assumptions considered, the most economically attractive route appears to be the proposed Granite Reef Aqueduct, with the most economical alternative being the Hualapai route. Certain nonquantifiable benefits accrue to the latter which tend to close the cost gap.
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