FLOOD03238

• Designation Number: 138
• County: Jefferson
• County: Denver
• Community: Lakewood
• Stream Name: Lakewood Gulch
• Basin: South Platte
• Title: FHAD - Lakewood Gulch
• Date: 2/1/1979
• Designation Date: 5/18/1979
• Prepared For: Lakewood, Denver County, Jefferson County
• Prepared By: UDFCD
• Floodplain - Doc Type: Floodplain Report/Masterplan

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SUMMARY

1

Presented in this volume is information regarding the potential

flood hazard on Lakewood Gulch in Jefferson County, 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 the channel itself to be in the same general condition

which exists in 1978.

The reader must be aware that a 100-year storm would cause ad-

ditional localized flooding due to concentrations of runoff

at various locations throughout the basin. Many of these loca-

tions would not be associated with the flooding along the gulch.

For this reason, the report cannot be presumed to delineate all

areas of flood hazard within the studied basin.

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 the channel.

Generalized presentations are made of the evaluation of rain-

fall and runoff characteristics (hydrology) and the determina-

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

have facilitated the preparation of twenty-three Flood Hazard

Area Delineation Sheets (FHAD Sheets) which are the essence of

this report. Through use of these sheets, the reader may deter-

mine which properties are anticipated to be inundated by a fu-

ture lOO-year flood event, presuming nO changes in the Lakewood

Gulch Channel.

This report illustrates the fact that a major flood hazard exists

along the studied channel. As such, the report represents an

initial step in enabling the Urban Drainage and Flood Control

District, the governmental agencies, and the property owners

to understand and to deal with the potential flood damage.

The illustrated flooding is that which would occur due to the

conveyance of the flows by the main channel of Lakewood Gulch.