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<br />Colorado Water Conservation Board
<br />
<br />Department of Natural Resources
<br />1313 Sherman Street, Room 721
<br />Denver, Colorado 80203
<br />Phone: (303) 866.3441
<br />FAX: (303) 866.4474
<br />www.cwcb.state.co.us
<br />
<br />MEMORANDUM
<br />(Updated September 26, 2001)
<br />
<br />STATE OF COLORl\DO
<br />
<br />a
<br />
<br />TO:
<br />
<br />Colorado Water Conservation Board Members
<br />
<br />Bill Owens
<br />Governor
<br />Greg E. Walcher
<br />Executive Director
<br />Rod Kuharich
<br />eWeB Director
<br />Dan McAuliffe
<br />Deputy Director
<br />
<br />FROM:
<br />
<br />John Van Sciver, P,E,
<br />Mike Serlet, P,E" Chief
<br />Water Supply Planning and Finance Section,
<br />
<br />DATE: September 11, 2001
<br />
<br />SUBJECT: Agenda Item 16a., September 24-25,2001 Board Meeting
<br />Consolidated Home Supply Ditch and Reservoir Company
<br />
<br />I ntraduction
<br />The Consolidated Home Supply Ditch and Reservoir Company (CHSDRC) is applying for a
<br />$943,000 Emergency Loan from the Construction Fund to rehabilitate the dam on the Mariano
<br />(Boedecker) Reservoir, The estimated total cost of the project is $1,048,000, Please see the
<br />attached project summary and map,
<br />
<br />BackQround
<br />The CHSDRC, located in Larimer County, operates the Mariano Reservoir for the benefit of the
<br />shareholders by providing direct flow and storage irrigation water to a 16,500-acre service area.
<br />The Reservoir is located about 2,5 miles southwest of Loveland, and is filled by the George Rist
<br />Ditch with headgate on the Big Thompson River. The dam, constructed in 1889, is a Class I
<br />structure, 25 feet high, impounding a reservoir of 5571 ac-ft. Annual maintenance and repair has
<br />been needed to keep the dam in operation and in compliance with State Engineer safety
<br />standards, The downstream slope is rather steep (1,75:1), and the dam has a history of seepage
<br />along the toe, particularly near the spillway, The outlet is a horseshoe tunnel with wooden floor,
<br />requiring regular repair work over the years,
<br />
<br />On June 27,2001 a longitudinal crack was found on the downstream slope, just below the crest of
<br />the dam, The crack was about 30 feet long and had a scarp of about 6 inches, A slight bulge was
<br />found at the toe of the dam, below the scarp, The Company contacted their engineer, and the
<br />State Engineer's Office, and proceeded to lower the reservoir level.
<br />
<br />The CHSDRC needs to rehabilitate the Mariano Dam so that it can be safely placed back in
<br />service as soon as possible. The Company needs to store water this winter, to provide water for
<br />irrigation in summer 2002. The CHSDRC is eligible to apply for a loan from the Emergency
<br />Infrastructure Repair Account because "", the project is necessary to avoid unreasonable risk of
<br />injury or damage to human health or well-being or to property or crops, and because the
<br />emergency condition is not the result of negligence in the operation or maintenance of the
<br />infrastructure," Work is tentatively scheduled to be completed in fall-winter 2001,
<br />
<br />Flood Protection. Water Project Planning and Financing. Stream and lake Protection
<br />Water ,Supply Protection. Conservation Planning
<br />
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