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Town of Gypsum <br />May 12, 2009 (UPDATED May 22, 2009) <br />Page 3 of 6 <br />Agenda Item 17a <br />The Town produces and stores its own drinking water and has 2,038 water service taps. Drinking <br />water is obtained from Mosher Springs and Gypsum Creek; both supply the entire Town with <br />drinking water. Because the Mosher Springs diversion produces very high quality water, there are <br />very few chemicals needed to treat this water supply. <br />The Town's distribution system is currently adequate and a master plan exists for addressing growth <br />inside and outside the Town's boundary areas. The Town has policies in place to encourage the <br />conservation of water, including a graduated monthly service rate schedule for existing users. <br />Water Rights <br />Water Right Amount Decreed Decreed Use Appropriation/ <br />Adjudication <br />LEDE Ditch 15.23 cfs Irrigation 1931/1936 <br />LEDE Reservoir 947 AF Absolute Imgarion 1931/1936 <br />Eye Lake Supply Ditch 20 cfs, condirional Delivery of water into storage 1966/1991 <br />Wolcott Reservoir 600 AF, conditional M&I, stock watering, augmentation and <br />exchange, power generation, recrearional 1966/1979 <br />1992/ 1993 <br />LEDE Ditch Enlargement 30 cfs, condirional Domestic irrigation, M&I including <br />augmentarion and exchange 1998/2005 <br />LEDE Res. Enlargement 400 AF, conditional Storage for recreational, aestheric, <br />piscatorial purposes, M&I 1998/2005 <br />Project Description <br />The Reservoir dam is a homogenous earth embankment with a rock toe drain. According to records of <br />the State Engineer's Office (SEO) and construction drawings, the dam was originally constructed to a <br />height of about 15 feet in 1931, and raised to 39 feet around 1940. The present height of the <br />Reservoir Dam is 33.5 feet, the crest length is about 340 feet, and the crest width varies from 8 to 12 <br />feet. The existing spillway is an unlined 16 foot wide open-cut channel. The outlet consists of an 18 <br />inch pipe. The dam is presently classified as a Small Dam (20 to 50 feet high, 100 AF to 4000 AF <br />storage); however, new dam safety regulations likely will identify the dam as a High Hazard <br />Classification. <br />Several maintenance and regulatory upgrades are required for both the Ditch and the Reservoir such <br />as: spillway upgrades, dam raised for 5 foot free board requirement, dam crest widened, outlet pipe <br />rehabilitation, outlet gate rehabilitation, ditch head gate upgrade, and open ditch to be replaced with <br />pipe. <br />Several alternatives were evaluated. With the exception of Alternative 1, all include improvements to <br />the Ditch and headgate. Those improvements include a new headgate, 860 feet of 30 inch pipe joint <br />