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<br />" <br /> <br />, <br />. <br /> <br />. <br /> <br />. <br /> <br />Colorado Water Conservation Board <br />Department of Natural Resources <br />721 Centennial Building <br />1 31 3 Sherman Street <br />Denver, Colorado 80203 <br />Phone: (303) 866.3441 <br />fA)C (3D3) 866.4474 <br /> <br />STATE OF COLORI\DO <br />'~ <br />~ <br /> <br />Roy Romer <br />Governor <br /> <br />Jilmes S. LOchhead <br />Executive Direaor, ONR <br /> <br />DilriesC. tile, PE. <br />Oireoor, ewes <br /> <br />MEMORANDUM <br /> <br />TO: <br /> <br />Colorado Water Conservation Board Members <br /> <br />Bill Stanton, P.E" Chief, Project Planning and Construction Section~' <br />Bill Green, P.E., Planning Engineer 'i~ ' <br /> <br />June 26, 1998 <br /> <br />FROM: <br /> <br />DATE: <br /> <br />SUBJECT: <br /> <br />Agenda Item 17. b., July 13-14, 1998 Board Meeting - Ryan Gulch <br />Reservoir Co. - Request for Feasibility Study Grant <br /> <br />Introduction <br /> <br />The Ryan Gulch Reservoir Company of Love:land is requesting a grant of $5,000 for a <br />feasibility study of a spillway enlargement project. <br /> <br />Background <br /> <br />The Ryan Gulch Reservoir Company was incorporated in 1903. The Company has 10 <br />shareholders with 100 shares of stock and an average annual yield of 8.0 acre-feet pet <br />share. Assessments are currently $50 per share and the Company has no existing debt. <br /> <br />Ryan Gulch Reservoir is located on the south side of Loveland about one mile west of <br />Highway 287 in Larimer County, The reservoir has an estimated capacity of 800 acre-feet <br />but is currently restricted by the State Engineer's Office (SEa) to 645 acre-feet of storage <br />due to inadequate spillway capacity. The dam is presently considered a Class II structure <br />by the SEa, which means the spillway must be capable of passing 50 percent of !he <br />Probable Maximum Precipitation (PMP) like:ly to occur in the drainage basin above the <br />dam, <br /> <br />Discussion <br /> <br />Ed Toms, P.E., has conducted a hydrologic analysis and an incremental damage <br />assessment for the reservoir and the Company is requesting that the SEa classify the dam <br />as a Class ill structure based on that analysis. A Class ill structure is required to pass the <br />100-year flood event, which is considerably less than.one-half of the PMP. <br />