FLOOD00268

• County: Jefferson
• County: Denver
• Community: Lakewood, Denver
• Stream Name: Dry Gulch
• Title: Flood Hazard Area Delineation - Dry Gulch and Tributaries
• Date: 11/1/1977
• Prepared For: Denver / Lakewood
• Prepared By: UDFCD
• Floodplain - Doc Type: Floodplain Report/Masterplan

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1

SUMMARY

North Dry Gulch, and Colfax Gulch. The reader must be aware

that a 100-year storm would cause additional localized flooding

due to concentrations of runoff at various locations throughout

the cities. Many of these locations would not be associated

with the flooding along the gulches. For this reason, the re-

port cannot be presumed to delineate all areas of flood hazard

within the studied basins.

Presented in the volume is information regarding the potential

flood hazard on Dry Gulch, North Dry Gulch, and Colfax Gulch

in Lakewood and Denver, Colorado. The information is presented

in the form of maps, tables, figures, and photographs which

illustrate the anticipated flooding which would result from

a 100-year storm (one which would be expected to occur, on the

average, once every 100 years). The report assumes the land

in the drainage basin to be fully developed (simulating a future

condition), and that the channels themselves are in the same

general condition which exists in 1977. The predicted flooding

is consequently slightly greater than would actually occur at

present, since minor portions of the basin are not yet developed.

Supportive data, including water surface elevations, flood depths

and velocities, rainfall and runoff parameters, and other tech-

nical information are also presented. Section VII contains

a narrative on the nature of the flood hazard along each of

the channels.

Generalized presentations are made of the evaluation of rainfall

and runoff characteristics (hydrology) and the determination

of the depths of flooding (hydraulics). These analyses have

made possible the preparation of twenty Flood Hazard Area Delin-

eation Sheets (FHAD Sheets) which are the essence of this report.

Through use of these sheets, a reader may determine which prop-

erties are anticipated to be inundated by a 100-year flood event.

The illustrated flooding is that which would occur due to the

conveyance of the flows by the designated channels of Dry Gulch,

This report illustrates the fact that a major flood hazard exists

along the studied channels. As such, the report represents

an initial step in enabling the Urban Drainage and Flood Control

District, the cities, and the property owners to understand

and to deal with the potential flood damage.