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North Sterling Irrigation District Agenda Item 17d <br />May 12, 2009 (UPDATED May 22, 2009) <br />Page 3 of 6 <br />loan contract exceeds $40Q,000, the Irrigation District Law of 1905 requires the District to hold a <br />special election to authorize and ratify the contract. <br />Water Rights <br />Table 1. Water Rights <br /> <br />Water Right Use Appropriation Adjudication Amount Su 1 Source <br />pp y <br /> Date Date <br /> So. Platte River <br /> 69,446 AF Springdale Cr. <br />Reservoir Storage 6/15/1908 1/1/1922 Pawnee Cr. <br /> Cedar Cr. <br />Reservoir Stora e 6/15/1908 1/1/1922 2,000 AF Cedar Cr. <br />Reservoir Storage 6/15/1908 1/1/1922 5,000 AF Pawnee Cr. <br />Reservoir Storage S/1/1915 1/1/1922 11,954 AF So. Platte River <br />Direct Flow 5/27/1914 1/13/1936 460 cfs So. Platte River <br />Recreation, Wildlife, 12/1988 6/29/1989 69,446 AF So. Platte River <br />Piscatorial 11,954 AF <br /> 294 cfs (abs) <br />Recharge, Exchange, 5/8/1996 7/21/2006 306 cfs (cond) So. Platte River <br />Augmentation 7,800 AF <br />Recharge, Exchange, <br />12/31/2002 <br />7/21/2006 600 cfs (cond) <br />So. Platte River <br />Au entation 24,000 AF <br />Industrial, Commercial, <br />Fire Protection, <br />Recharge, Exchange, 12/31/2002 7/21/2006 15,000 AF So. Platte River <br />Augmentation, <br />Munici al, Domestic <br />On average, 82,207 AF of water are delivered from the Reservoir and approximately 59,654 AF <br />are delivered to farm headgates. <br />Project Description <br />The purpose of this Project is to enlarge the spillway to meet current State Engineer's Office <br />(SEO) requirements. In 1982, the District constructed a 530 foot spillway that was designed to <br />pass 50% of the flows resulting from the Probable Maximum Precipitation (PMP). In 1999, the <br />Project was revived when the District received notice from the SEO that the spillway must pass <br />75% of the flows from the PMP. A hydrological study was updated by W.W. Wheeler and <br />Associates, Inc. and has been approved by the SEO. During the spillway investigation, it was <br />determined that the crest of the dam needed to be leveled and a seepage area on the downstream <br />side of the dam required the installation of a drain. It is the desire of the District to correct all the <br />dam issues during the spillway enlargement. <br />Four alternatives were considered prior to reaching the cunent spillway design. The alternatives <br />were: <br />