FLOOD10854 ‎(2)‎

• Designation Number: 590
• County: Denver
• Community: Denver
• Title: FIS - Denver - Volume 1
• Date: 11/17/2005
• Prepared For: Denver
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

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 USACE,
Omaha District, in 1953. The project, located immediately 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 chalU1cl 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 I-percent-alU1ual-chance flood flow within 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 I-percent-annual-chance and O.2-percent-annual-chance flood.

Westerlv Creek

The Kelly Road Dam on Westerly Creek was constructed by the USACE in 1954
(Reference 4) to control storm runoff; however, the urban development upstream has
lowered the protection leveL A recent rehabilitation project has restored somewhat
the structure's ability to attenuate flood peaks. Channel improvements are underway
downstream of Kelly Road Dam. When completed, they will further reduce the flood
hazard between 11 th Avenue and Stapleton International Airport.

Coon Creek

The Coon Creek basin is undergoing rapid development, with more proposed for the
future. The emphasis is on channel improvements that will confine the
I-percent-annual-chance flood to the channel. Individual developers are constructing
the channel improvements as new subdivisions are built adjacent to the existing
channel. Improvements have been made to the Coon Creek Drainageway to provide
for development of a shopping center. The channel improvements provide
conveyance of the I-percent-annual-chance flood from State Highway 121 to a point
approximately 1,850 feet upstream (Reference 25).

Harvard Gulch'l West Harvard Gulch. Dry Gulch (Harvard Gulch Tributary)

Several drainage improvement projects have been constructed in the Harvard and
West Harvard Gulch basins over the last 15 years. The more extensive
improvements were made on Harvard Gulch as part of the Harvard Gulch Flood
Project, which was the result of a $2.3 million bond issue passed by Denver in 1964.
This project included an underground box culvert from South Logan Street to the

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