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I I I I I I I I I I I I I I I I I I I Executive Summary This study exammes the feasibility of various structural and non-structural measures to rehabilitate Horseshoe Dam No.2 Outlet Works for the Greeley and Loveland Irrigation Company and the Seven Lakes Reservoir Company. The study has been prepared in conformance with requirements for funding of the Colorado Water Conservation Board (CWCB) and the dam safety regulations of the Colorado State Engineer's Office (SEO). This study examines the feasibility of non-structural and structural alternatives; and demonstrates the technical, financial, environmental, and institutional feasibility of rehabilitating the outlet works. The recommended alternative includes the lining of the existing 72-inch Rep gate chamber with concrete, installing two (2) 42-inch sluice gates, sleeving the existing upstream 48-inch RCP with a 42- inch cement lined steel pipe, and constructing a prefabricated concrete gate house to house the two gates. The Companies will not be requesting funding for the rehabilitation of the outlet works. The original plan was to enter into an agreement with CWCB for the construction funds after this feasibility study was completed. The Companies decided to fund the project with their own funds. The Companies did requested funding for the feasibility study at the July 1998 CWCB meetings held in Telluride, Colorado. The Board approved a grant, from the Severance Tax Operational Account, for $2,500. Total capital expenses for the recommended spillway alternative, including construction and construction engineering with 20 percent contingency, design engineering, and the cost of this study, was $328,000. CWCB portion of the total cost is the approved $2,500 for this feasibility study. Construction would begin in February 1999 with completion by April 1999. Horseshoe Dam No.2 Outlet Works SIudy BD'rILE 3