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ICf'17 I. MODIFICATIONS IN PLAN SINCE PROJECT AUTHORIZATION Plan at Time .of Authorization In the plan proposed at the time of project authorization in 1968, as presented in the feasibility report of 1966, most 'of the water would have been provided for irrigation. The plan would have developed a total water supply of 75,300 acre-feet annually, including 60,300 acre-feet for irri- gation and 15,000 acre-feet for municipal use. An irrigation supply of 54,300 acre-feet a year would have served 14,690 acres of full service land on Log Hill Mesa and 210 acres of full service land between East and West Forks of Dallas Creek. Also 960 acres in the Log Hill Mesa area would have received 800 acre-feet of supplemental irrigation water annually. The re- maining 5,200 acre-feet of irrigation water "'Juld have been used for supple- mental irrigation of 7,760 acres in the Colona and Dallas.Creek areas. The 15,000 acre-feet of 'municipal water was planned for Montrose, Olathe, Delta, and the surrounding rural areas in the Uncompahgre Valley. Flood control and improved water quality in the Un.compahgre River would have' resulted. Storage would have been provided in three project reservoirs--Ridgway on the Uncompahgre River, Dallas Divide on Pleasant Valley Creek, and Sneva offstream from Cow Creek. Ridgway Dam would have been located just downstream from the tmvn of Ridgway and "ould have inundated that community. Additional water would have been delivered to the reservoir by an 8.5-mile- long feeder canal from Cow Creek. The capacity of the reservoir would have been ll,6,500 acre-feet. A hydraulically operated Ridgway Pumping Plant would have lifted water from Ridgway Dam to Log Hill Mesa where it would have been distributed by McKenzie Canal to project lands. A waterfowl production area \Jas planned along the Ciouthern portion of the reservoir where the shoreline would have been relatively flat. Dallas Divide Dam would have been located on Pleasant Valley Creek about 8 miles west of Ridgway. The reservoir would have had a capacity of 17,600 acre-feet. The water would have been obtained from the East and West Forks of Dallas Creek and conveyed to the reservoir by the Dallas Feeder Canal. Water from the reservoir would have been delivered to Log Hill Mesa. Lands by the Log Hill Canal and by open ditch laterals. The 825 acre-foot Sncva Reservoir would have been fed by an existing ditch from Cow Creek. \.Jater would have been released to a short outlet canal for delivery to existing ditch systems. Plan Using Project Water for Energv Development The pIau was changed because National and regional priorit.ies in the early 1970's cansed a shift in project emphasis from iLrigation to municipal and industrial water use. The dm1l site proposed ill that e.~rly plan is a glacial mOLaine, portions of which are highly pervious, and bedrock is more