FLOOD11741

• Designation Number: 277
• County: Arapahoe
• Community: Arapahoe County and Unincorporated Areas
• Basin: South Platte
• Title: FIS - Arapahoe County and Unincorporated Areas
• Date: 8/1/1977
• Prepared For: Araphoe County
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

In a joint meeting on August 16, 1974, with the Urban
Drainage and Flood Control District, the Federal Insur-
ance Administration, and the private engineering firm
of Gingery Associates, Inc., the study reaches were
clearly explained with the methodology to be used in
the study. An additional meeting was held on January 24,
1975, in Washington, D.C., to further clarify the pur-
pose of the study and methods used for flood plain
delineation. The Urban Drainage and Flood Control
District supplied contour maps at 2-foot intervals on
Big Dry Creek, Sand Creek, and Coal Creek along with an
interim report, Major Drainageway Master Plan - Big
Dry Creek (Reference 7).

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Numerous other agencies and individuals were contacted
for background information. Agencies included the
Colorado Water Conservation Board (Reference 8), the
Colorado Highway Department, the Union Pacific Railroad,
the Soil Conservation Service, and the Denver Post news~
paper. Private citizens of Watkins, Strasburg, Byers,
and Deer Trail were interviewed regarding past floods,
high-water marks, and flood damage.

Public hearings were held on July 7, 1975, and September
16, 1975, by the Planning Commission of Arapahoe County
at which the Federal Insurance Administration's Consulta-
tion Coordination Officer and the engineering consultant
explained to the Commission and citizens the purpose of
flood insurance and technical methods used to develop
the maps as presented.

1.3 Authority and Acknowledgments

The source of authority for this Flood Insurance Study
is the National Flood Insurance Act of 1968, as amended.

The hydrologic and hydraulic analyses for this study
were performed by Gingery Associates, Inc., for the
Federal Insurance Administration, under Contract No.
H-3716. This work, which was completed in July 1975,
covered all flooding sources affecting Arapahoe County.

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2.0 AREA STUDIED

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2.1 Scope of Study

This Flood Insurance Study encompasses the unincorporated
areas of Arapahoe County, located in central Colorado,
south and east of Denver. Those areas not included

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