Central Utah Project, Bonneville Unit correspondence, 1978

Page 42

r With full development of the recommended plan, water stored in Jordanelle Reservoir would be derived from various sources depending on available runoff. During years of surplus flow when Utah Lake spills would normally flow unused to Great Salt Lake, the lake spills would be the primary supply and be held back in Jordanelle Reservoir. In normal years savings in evapotranspiration from diked Utah Lake would be the primary supply. In years of short supply, the principle source would be made from releases out of Strawberry Reservoir. In the event that Utah Lake were not diked, the water supply would be provided from Utah Lake spills and Strawberry Reservoir. Water released from Strawberry Reser­voir would be conveyed through the proposed Diamond Fork power system for hydroelectric power generation. During the interim until the power system is operating, most of the Provo River flows would be replaced with water released from Strawberry Reservoir through the existing Strawberry Tunnel. These releases would then flow down Sixth Water, Diamond Fork, and the Spanish Fork River. During the early years of operation, the releases would be small, matching the M & I demand of Salt Lake and Utah Counties. By the time demands grew to significant sizes, the recommended Diamond Fork Power System would be constructed and the plan would operate as described above or one of the following two alternative delivery systems would be constructed. The first alternative would be through the existing tunnel and system as described for the interim operation, with rehabilitation and necessary stream protection work accomplished. The second alternative would include Wallsburg Tunnel, which would convey water from Strawberry Reservoir to Main Creek, where it would flow into Deer Creek Reservoir and, from there, into Utah Lake.