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Greeley and Loveland Irrigation Company - Boyd Lake Spillway November 19-21, 2003 Agenda Item 8d a crest length of 10,729 feel. Colorado State Parks has recreational surface rights to Boyd Lake. The current spillway is considered to be a natural swale, located near the pump house in the east side of the dam embankment, with an approximate spillway width of 20 feet. The spillway is considered abandoned and is no longer operable or capable of conveying any storm flows. The SEO requires that Class I dams contain spillways capable of safely passing 75% of the Probable Maximum Precipitation (PMP) storm evenL Even if it were operable, the existing spillway could only safely pass approximately 16% of the PMP storm event. The reservoir is not presently under SEO restriction, however, a 1999 deadline was imposed to demonstrate that the existing dam configuration meets Colorado dam safety guidelines. While overdue on this date, hydrologic assessments have been ongoing. The SEO has not imposed restrictions, as the GLlC has been proactively pursuing a design for the spillway. Recently, GLlC and the SEO have reached agreement on a site-specific PMP reduction to be accepted for spillway design, allowing the Boyd Lake project to move forward. Improvements to Horseshoe Lake spillway are not anticipated at this time, pending final SEO hydrology review, and provided agreement can be reached between SLlC, State Parks and Larimer County regarding overflows of County Road 11C between the reservoirs. At the January 2003 CWCB meeting, the Board approved a loan to GLlC for $1,000,000, to perform rehabilitation work (not State-mandated) on the low-level outlet structure at Boyd Lake, to take advantage of low lake levels. In March 2003, CWCB staff received a letter from the GLlC indicating that their Board was declining the loan for the low-level outlet project. The anticipated Federal grant funding for State-mandated spillway improvements was not forthcoming, forcing GLlC to reconsider their priorities. The GLlC Board of Directors elected to address the spillway issue first, and indicated that they would apply for a CWCB loan for the spillway work. Feasibilitv Studies The GLlC, through their engineer Boyle Engineering Corporation, has completed a feasibility study in accordance with CWCB guidelines, The study includes an assessment of spillway alternatives to meet the requirement of safely passing 75% of the Probable Maximum Precipitation (PMP) event. Project SpDnsor The GLlC is a Colorado mutual ditch company and non-profit corporation registered in the State of Colorado, in good standing. The Company was incorporated in 1900. There are 170 shareholders holding 1644 shares of stock. The GLlC exists in perpetuity and sets annual assessments that are assigned to the stockholders according to the number of shares they own. The Board of Directors has the authority to incur debt as they deem necessary to carry out the purposes of the company, and to pledge assets of the company to secure repayment of loans. It also holds the power to refuse to deliver water to shareholders who fail to pay their assessments, and the power to take legai action against delinquent stockholders, and offer forfeited shares for sale to pay for unpaid assessments. Revenues are derived principally from stock assessments, running charges, and small amounts of revenue coming from leasing rights for recreational use of several reservoirs. Of the 1644 shares of stock there are 781.65 shares in agricuitural ownership (47.6%) and 862.35 shares in municipal ownership (52.4%) - Greeley (760.51 shares) and Evans (101.84 shares). Water RiQhts GLlC owns two diversion points on the Big Thompson River, the GLlC Canal diversion and the Big Barnes Ditch diversion, with a total water right to divert of 360 cfs. In addition, they have a 49,000 acre-foot storage right for Boyd Lake, and a 12,700 acre-foot storage right for Lake Loveland. On the average GLlC delivers 37,812 acre-feet per year to its shareholders (1644 x 23 AF/share.) Page 2 of 6