FLOOD00850

• Designation Number: 31
• County: Arapahoe
• Community: Unincorporated Arapahoe County
• Title: Major Drainageway Planning - Little Dry Creek, Report, Volume I
• Date: 2/1/1974
• Designation Date: 6/1/1974
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Clarkson Street the waterway has been shaped and grass grows on its banks.

The waterway has deteriorated, however, and under existing 100-year flood

conditions is inadequate to convey the flow. There are six bridges across

the channel in this reach, all of which have inadequate waterways and would

cause excessive head loss under present 100-year flood conditions.

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Little Dry Creek in Cherry Hills. From Clarkson Street to Cherry Hills

Country Club golf course, the channel winds among high value residences

in rustic terrain. This brushy reach has two bridges, a pipeline crossing,

an inverted siphon for City Ditch irrigation water, and at the golf course

a 6-foot chain link fence crosses the channel.

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The 4,200-foot waterway through the golf course is fairly straight and

grass is kept mowed down to the water's edge. There are ten pedestrian

bridges of varying types and sizes in the golf course. They are expected

to fail during high flood stages. Debris from some of these bridges would

probably lodge against the downstream 6-foot chain link fence, cause the

fence to give way, be carried further downstream to obstruct street bridge

openings or even partially obstruct the Cinderella City conduit.

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Immediately above the golf course, a 600-foot reach south of Quincy Street
bridge has become so overgrown with vegetation that it is difficult to
walk through it. With the channel partially blocked, flood runoff must
flow around the reach on the flood plains.

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From 600 feet south of Quincy Avenue to Belleview Avenue, the winding chan-

nel is comprised of open grassy reaches and brushy tree-studded reaches.

Accumulations of woody debris may be seen in water-laid piles in a number

of places. There are four light private bridges, two suspended pipeline

crossings, and a 4-foot high irrigation diversion structure between Quincy

and Belleview Avenues. Flowing against a cliff, the channel turns in a

1300 hairpin bend just north of Belleview Avenue. The large open field

within the bend is presently subject to flooding as indicated in the U.S.

Corps of Engineers report.

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