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...... - ) -iiJ.,I.J . for its construction. However, in the interest of preserving the natural environment and the scenic qualities of the area and because access to the proposed conduit alinement would be easier without construction of access roads and the proposed conduit alinement would not interfere with present and future land development, the proposed conduit alinement was selected in lieu of this alternative. 9. Alternative to the Arkansas Valley Conduit The Bureau of Reclamation and the Four Corners Regional Commission joined the Southeastern Colorado Water Conservancy District in financing a study by Black and Veatch, consulting engineers, to examine and evaluate all feasible ways to supply project water, raw or treated, to the Arkansas Valley communities, The engineer- ing firm considered delivery of raw water and both desalting and conventional water treatment methods for delivery of treated water. The engineering firm considered many alternatives but only the recommended plan 'which is similar to the plan presented in Chapter II, Paragraph I, 3.b. as the proposal and the most promising alternative are presented in this report. The most promising alternative to the proposal would be to construct a reverse osmosis desalting plant near Fowler. Water for the plant would be obtained from ground water or from the Arkansas River in exchange for project water released to the river from Pueblo Dam. The city of Pueblo would receive project water from Pueblo Dam. However, there would be no conduit from Pueblo to the desalting plant. St. Charles Mesa would be served from the Pueblo distribu- tion system by a short lateral south of the Arkansas River. Boone and Avondale would also be served from the PlIphl () ,c::lystl'?'!!! by ':0!'!.- struction of a lateral along the north side of the river from the Pueblo Municipal Airport downstream to Boone. Fowler would be served by a short lateral extending upstream from the desalting plant. The alinement of the Arkansas Valley Conduit downstream from the desalting plant would be the same as that of the proposal, Figure II-42. . a. Associated Impacts The total length of conduit for this alternative would be approximately 15 miles less than the proposal; however, the total required right-of-way and corresponding clearing, stripping, and grubbing would be more than the proposal because of the right-of-way requirements for brine disposal. An evaporation pond of about 320 acres would be required for brine IX-35 .