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I I I I I I I I I I I I I I I I I I I rf"l"~!""'~ ~-': .~ '. " ,-. ,- "'" Estimated construction and operation and maintenance costs developed by the Nebraska Natural Resources Commission, in terms of 1980 dollars, are pre- sented in Table 4-1, together with the estimated amounts of water to be del i vered based on projected depl eted flows in source streams as of 2020 usi ng development in source bas i ns projected under Strategy Two. Annual costs, indexed to year 2000, the projected completion date, are also shown in Table 4-1. The costs are bas"ed on financing under the current criteria and loan rates of the Nebraska Resources Development Fund which are lower than the current federal rate. The values of surface water used in irrigation by subregion as estimated by the Commission in terms of 1977 dollars are presented in Table 4-2. These estimates equal the differences in net returns to agriculture under irrigated versus dryland conditions. Comparisons of the water values in Table 4-2 with water costs in Table 4-1 show that costs would be about two to seven times the val ues. Because of this wide disparity between costs incurred and values received, the Commission concluded that major changes in Nebraska state policies would be necessary before large-scale, intrastate interbasin transfers should be con- sidered further. No additional analyses have been made. Oklahoma The Oklahoma Water Resources Board in cooperation with other state and federal agencies prepared the Oklahoma Comprehensive Water Plan Report which was published April 1, 1980, as Oklahoma Water Resources Board Publication 94. Major features of the Plan were two extensive intrastate interbasin water conveyance systems. The Northern Water Conveyance System would divert surplus flows at Lake Eufaula on the Canadian River and at Robert S. Kerr Reservoi r on the Arkansas River, both in eastern Okl ahoma, and convey the water for multiple uses in the North Central and Northwestern Planning Regi ons. The Southern Water Conveyance System woul d di vert surpl us yi el ds from existing and authorized reservoirs in southeastern Oklahoma for uses in central and southwestern Oklahoma. Of interest in connection with Management Strategy Four is the Northern Water Conveyance System, shown on Fi gure 4-4, 29