FLOOD01643 - Laserfiche WebLink

Home Browse Search

storage are available between the crest of the inlet at elevation 5520.0 feet and the cop of the fabridam at elevation 5531.0 feet. Leyden Lake is an irrigation water-storage reservoir on Leyden Creek northwest of Denver. There are approximately 5S0 acre-feet of uncontroLled storage between the spillway crest at 5,612 feet and the crest of the dam at elevation 5,620 feet (References 22 and 23) . Bear Creek The completion of the Bear Creek Dam just downstream of the Town of Morrison has greatly affected the peak discharges of Bear Creek. Designed by the CaE, the dam provides a flood control reservoir that intercepts flows from areas in the upper and middle parts of the basin. At the Bear Creek Reservoir, peak flows from the 100- year event have been reduced from 30,000 cfs to approximately 1,000 cfs through storage in the reservoir. There has been some straightening and enlargement of the channel downstream of the dam to reduce flooding in the lower, more developed areas of Bear Creek (References 9 and 24). Cherrv Creek. Cherry Creek. Dam and Cherry Creek. Reservoir were constructed by the COE, Omaha District, in 1953. The project, located illllllediately upstream of Denver, was constructed at a Federal cost of approximately -$14.7 million and provides protection for Denver from flash floods on Cherry Creek. The reservoir has' a flood-storage capacity of 79,960 acre-feet. During the June 1965 flood of record, the project prevented an estimated $130 miLlion in flood damages. During the 1973 flood season, it prevented an additional $27 million in damages (Reference 4). Retaining walls have been constructed along the Cherry Creek channel downstream of First Avenue to the confluence with the South Platte River. Portions of Cherry Creek, ,between First Avenue and the South Platte River, and in the vicinity of South Monaco Street Parkway, have been improved and recently rehabilitated to carry much of the lOa-year floodflow wi thin the channel banks. Earthen berms have been constructed south along Cherry Creek. between South Holly Street and upstream of South Monaco Street Parkway, which have minimal effect on the 100- and SOO-year flood. Wested v Creek. The Kelly Road Dam on Westerly Creek was constructed by the COE in ~954 (Reference 4) to control storm runoff; however, the urban je.....~elopment upstream has lowered the protection level. A. recent rehabilitation project has restored somewhat :he st~~cturets ability to attenuate flood yeaks. Channel cmprovements are ~nderway -iot.,ffistream of Kelly Road Dam. "Jhen completed, they ;.;i"1.:' further reduce :he flood hazard ~etNeen ~l:h Ave~lle ~~d Stapleton International Airport.