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-~~~ a~ ~ -~ ~- .~-~~I z 7 Comparison of 10825 Water Supply Alternatives for the Upper Colorado River Endangered Fish Recovery Program MAY 20, 2008 10825 WATER SUPPLY STUDY BRIEFING FOR CWCB BOARD OF DIRECTORS AND STAFF PRESENTED BY GRAND RIVER CONSULTING PROJECT PARTNERS East and West Slope water providers / CWCB (1177 grant for $200,000) Project Team: Steering Committee, GEI, Miller Ecological, Ecological Resource Consultants, ERO Resources All notes, reports and technical memos are available at www.srandriver.us 10825. PURPOSE AND NEED: The 10825 Water Supply alternatives must fulfill the obligation of the east and west slope water providers who divert water from the Colorado Basin to deliver 10,825 acre feet of water to the 15 Mile Reach in Grand Junction from July through October in all years to beneft the four target fish species. An agreement to provide the water must be approved by the US Fish and Wildlife Service and in place by December 2{l09 and must be implemented by the date specified in the agreement. OBJECTIVES: The alternatives considered must meet the "purpose and need" and may not impair or reduce the water sup~~ply available to any west slope or east slope water provider. Secondary objectives include developing alternatives that would benefit and/or have minor negative impacts on the headwater streams in the Colorado River Basin. Some of the alternatives meet this secondary objective better than others. As stakeholder consensus is one of the evaluation criteria in the study, the "most promising" alternatives that meet both the primary and secondary objectives are most likely to have support by the stakeholders in this process. ELEMENTS NOT RECOMMENDED FOR FURTHER STUDY 15 Mile Reach Pumpback Mt. Logan Reservoir Pipeline from Ruedi to Basalt Tunnel from Ruedi to Roaring Fork Grand Valley Lake Wolcott Reservoir Buzzard Creek Reservoir Middle Fork Reservoir Shoshone Call Subordina^tion Yank Creek Reservoir Webster Hill Reservoir Roan Creek Reservoir Upper Colorado Reservoirs (6) Wolford Mtn. Reservoir enlargement Williams Fork Reservoir exchange ELEMENTS RECOMMENDED FOR FURTHER STUDY Ruedi Reservoir Sulphur Gulch Reservoir Granby Reservoir OMID Improvements SIX MOST PROMISING ALTERANTIVES CURRENTLY BEING CONSIDERED BY THE WATER PROVIDERS • Ruedi Reservoir, (Alt. A) All 10,825 AF from existing Ruedi Reservoir. • Sulphur Gulch Reservoir, (Alt. B) All 10,825 AF from new 16,000 AF Sulphur Gulch Reservoir. • Ruedi and Sulphur Gulch Reservoirs, (Alt Cl) Half of the water from each faciiity. • Granby and Ruedi Reservoirs, (Alt. C7) Y from Granby and'/+ from Ruedi. • Granby, Ruedi and OMID Improvements/Green Mtn. Reservoir, (Alt C8) "The Kitchen Sink" '/< from Granby, % from Ruedi, and % from Green Mountain HUP Surplus ('/ from Ruedi in dry years) • Granby and Sulphur Gulch Reservoirs, (Alt C9) % from Giranby, % from Sulphur Gulch. Por more information visit www.grandriver.ns/10825