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~ . <c ~ The supplements will document the plan to combine the Highline Canal with the Towaoc Canal, a feature of the Dolores Project, to create the Towaoc-Highline Combination Canal. The features of the McElmo Creek Unit to be discussed in the supplement include abandoning the Rocky Ford Ditch, installing buried pipe laterals from the Towaoc-Highline Combination Canal to the Rocky Ford service area, and lining segments of the Lone pine and Upper Hermana Laterals. Other modifications to features not related to salinity in the Dolores Project will also be documented. The awarding of the first construction contract for salinity-related features, Reach 1 of the Towaoc-Highline Combination Canal, is now scheduled for the spring of 1989. Construction of all features will be completed in the fall of 1993. Expected salt load reduction to the river system will be 23,400 tons per year for the off-farm element. The McElmo Creek USDA salinity control report was published in 1983. The recommended implementation plans call for treatment of about 19,700 acres with sprinkler irrigation systems (10,400 acres gravity and 9,300 acres pumped) and about 270 miles of onfarm ditch and lateral lining. By com- bining the DOl Dolores Project and the McElmo Creek salinity project, the more efficient gravity pressure sprinkler systems can be installed to an additional 9,000 acres over the original USDA implementation plan. The DOl and USDA projects are fully compatible, however, it is extremely criti.cal that a fully coordinated effort be initiated so the design and implementation of DOl delivery and distribution systems complement the design and installation of onfarm systems. A reevaluation of the USDA implemetation schedule will be necessary to allow for coordinated onfarm and off- farm planning. . ". , . Uinta Basin UT (USDA) To date, over eighty percent of the Uinta Basin USDA onfarm and supportive off-farm salinity control improvements have been implemented through the use of LTA's (Long Term Agreements). More than ninety percent of the participants who entered into LTA's have done so through pooling arrange- ments whereby two or more participants develop mutually beneficial plans. A major emphasis has been placed on comprehensive planning and LTA preparation. Participants are assisted in implementing a well-balanced improvement program of structural and management practices that address salinity reduction and wildlife habitat enhancement. In FY 1985, 70 LTA's were authorized for implementation. These agreements, when completed, will minimize salt loading 22