FLOOD05456

• County: Adams
• Community: Adams County, Brighton, Commerce City
• Stream Name: South Platte River
• Basin: South Platte
• Title: Flood Hazard Area Delineation
• Date: 9/1/1977
• Prepared For: Adams County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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1

PREFACE

Upon acceptance of this report by the Urban Drainage and
Flood Control District and the designation and approval of
this report by the Colorado Water Conservation Board, the
areas described as being inundated by the 100-year flood
(Intermediate Regional Flood) can be designated as flood
hazard areas and their use regulated accordingly. It
should be noted that the terms "Intermediate Regional
Flood", "lOO-year Flood" and "one percent flood" can be
used interchangeably as they all define the same type of
flood event.

Authorization

This report was authorized by the Urban Drainage and Flood
Control District in joint sponsorship with the Colorado
Water Conservation Board. The District has the power to
enact District-wide flood plain regulations. At present,
the District makes flood plain information and mapping
available for local agencies to adopt and administer their
own flood plain regulations with the assistance of the
District.

Purpose and Scope

The Colorado Water Conservation Board has the power and duty

"...to designate and approve storm or floodway runoff
channels or basins, and to make such designations
available to legislative bodies of cities and incorpor-
ated towns, to county planning commissions, and to
boards of adjustment of cities, incorporated towns,
and counties of this state..."

This report was prepared for the guidance of local officials
in planning the use and regulation of the flood plain. The
report includes information on past floods and the nature and
extent of probable future floods which can be reasonably
expected on the respective study reaches. The 100-year flood
should be given appropriate consideration before planning
for development in the flood plain.

as stated in Section 30-28-201 for county governments and
Section 31-23-201 for municipal governments of the Colorado
Revised Statutes 1973.

The 100-year flood plain is shown on the Flood Hazard Area
Delineation Maps which delineate the areas that would be
inundated by such an event. Flood profiles show the water
depths relative to the stream bed. Elevation reference data
is given that can be applied across the full width of the stream
valley. Valley cross-sections are presented to indicate ground
level across the valley at specified locations and the overlying
flood depths. The flood profiles and flooded area data
presented are based on future, developed conditions in the
basin as determined from current master planning maps. Possible
future improvements to control floods are not a consideration
of this report.

as stated in Section 37-60-1-6 (1) (c) of the Colorado Revised

Statutes 1973. The cities, incorporated towns and counties

within the study area may provide zoning regulations.

"...to establish, regulate, restrict and limit such
uses on or along any storm or floodwater runoff channel
or basin, as such storm or floodwater runoff or basin
has been designated and approved by the Colorado Water
Conservation Board, in order to lessen or avoid the
hazards to persons and damage to property resulting
from the accumulation of storm or floodwaters..."