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<br />Slit Water Conservancy District <br />July 28.29, 2003 <br /> <br />Agenda Item 21d. <br /> <br />I <br /> <br />Water Rlahts e <br />The District's primary water right consists of a 10,384 acre-foot storage right in Rifle Gap Reservoir <br />with a priority date of 1951. The District also has a 1961 right out of the Colorado River (36 cfs), with <br />average annual diversions of 4000 acre-feet. Finally, SWCD has storage rights in the Harvey Gap <br />Reservoir (capacity 5806 acre-feet) dated 1891 and a 100 cfs direct flow right fDr the Grass Valley <br />Canal, dated 1887. The Bureau of Reclamation has set aside 5,000 acre-feet in Green Mountain <br />Reservoir for use as a replacement source for out-of-priority diversions by the Silt Pumping Plant. <br /> <br />Proiect DescriDtlon <br />Three alternatives were analyzed in the feasibility study for system rehabilitation. <br /> <br />1. The no-action alternative. <br />2. Obtain separate financing for each project, as needed. <br />3. Obtain financing to cover all high priority projects through a single loan application. <br /> <br />Alternative 1, the no-action alternative, was ruled out because it could mean that the SWCD would <br />lose portions of its storage and delivery system, and would not be able to supply water to its water <br />users, Alternative 2 was ruled out due to the delay, expense, and uncertainty associated with <br />submitting a separate loan application for each project. Alternative 3 was selected, since it will allow <br />the District to schedule and complete its highest priority projects in an orderly manner. <br /> <br />Selected Alternative 3 involves the following projects: <br /> <br />Replace Siphon #1 on the Grass Valley Canal. The siphon was built in the 1930's and consists of a .a <br />580 foot long steel pipe, 42 inches in diameter. This siphon is critical to the operation of the Grass _ <br />Valley Canal, which supplies water to the Harvey Gap Reservoir, and the Dry Elk Valley lateral. The <br />siphon pipe is rusted and leaking in many places, and the concrete support structures are <br />crumbling. The estimated cost of this sub-project is. $500,000. <br /> <br />Repair Harvey Gap Dam to control seepage into the outlet tunnel. Harvey Gap Dam is a Class 1 <br />structure with a dam height of 61 feet, impounding a reservoir of 5,806 acre-feet. The reservoir is <br />used to store project water and is a critical part of the SWCD system. State Engineer inspection <br />reports document the need to repair the seepage problem. The estimated cost of this sub-project is <br />$183,200. <br /> <br />Replace Pumps and Motors at the Silt Pump Plant.' The Pump Plant was constructed in 1967 to <br />supply up to 5,000 acre-feet annually to the 7,6-mile Silt Pump Canal. The pump plant and canal are <br />critical portions of the SWCD system. The pumps and motors are about 40 years old, and nearing <br />the end of their useful life. The estimated cost of this sub-project is $387,910. <br /> <br />Clean and repair the stilling basin at the Rifle Gap Dam. Rifle Gap Dam is a Class 1 structure with a <br />dam height of 124 feet, impounding a reservoir of 13,602 acre-feet. The reservoir is used to store <br />project water and is a critical part of the SWCD system. U.S. Bureau of Reclamation inspection <br />reports document the need to repair the stilling basin. The estimated cost of this sub-project is <br />$62,000. <br /> <br />Total Estimated Project Cost <br /> <br />$1,133,000 <br /> <br />The implementation schedule calls for completion of financing arrangements in Summer 2003. e <br />Engineering design work will be completed in fall and winter 2003/2004. Projects will be undertaken <br />based on priority, and completed in 2004 and 2005, <br /> <br />2 <br />