BOARD02386

• Board Meeting Date: 3/8/1972
• Description: Agenda or Table of Contents, Minutes, Memos
• Board Meetings - Doc Type: Meeting

MR;. VELEHRADSKY:

So this was the purpose of this revised
study. It was to take another look at Cherry
Creek to determine what should be done under
light of present day conditions to more effec-
tively control floods originating on Cherry
Creek. "

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'''Mr. Sparks outlined the history of this.
The planning for Cherry Creek started in the
midforties. The project was authorized by the
Flood Control Act of 1941 and 1944. During
the midforties the planning for the Cherry
Creek project was initiated and construction
st~ted in the late forties. At that time it
was recommended by the Corps that the Castlewood
dam be deferred and then the spillway was de-
signed to discharge into Toll Gate Creek.

At that time the value of properties along
Toll Gate Creek was about seven hundred thousand
dollars. In 1958 we made a' survey of the value
of property along Toll Gate and Sand Creeks
which would. be affected by discharge through
the spillway and the value was about 7.8 million
dollars at that time. In 1968 another survey
was made as part of this study and the value
of properties had risen to over 86 million
dollars. We anticipate, .if the development
continues at the rate it has in the recent past,
that it could conceivably go up in the neighbor-
hood of 250 million dollars.

The '65 flood in the Denver area caused
a change in our hydrologic criteria. Prior to
1965, the design basis for the projects were
based on the flood over West Bijou Creek in
1935. The rai.nfall over Plum Creek and then
over Bijou Creek in June of 1965 caused the
Weather Bureau to make a re-analysis of their
studies for this area and as a result our run-
off factors have been increased. Based on that,
we made a hydrologic evaluation of Cherry Creek
reservoir. Based on this analysis it appears
that a maximum probable flood in the Cherry

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