FLOOD10404

• Designation Number: 128
• County: Larimer
• Community: Larimer County and Unincorporated Areas
• Basin: South Platte
• Title: FIS - Larimer County and Unincorporated Areas
• Date: 9/1/1978
• Designation Date: 1/31/1979
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

FLOOD INSURANCE STUDY

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. 1.0 INTRODUCTION
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1.1 Purpose of Study

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The purpose of this Flood Insurance Study is to investigate the
existence and severity of flood hazards in the unincorporated areas
of Larimer county, Colorado, and to aid in the administration of the
National Flood Insurance Act of 1968 and the Flood Disaster Protec-
tion Act of 1973. Initial use of this information will be to
convert Larimer County to the regular program of flood insurance by
the Federal Insurance Administration. Further use of the information
will be made by local and regional planners in their efforts to
promote sound land use and flood plain development.

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1.2 Coordination

The identification of streams requiring detailed study was accomplished
at a meeting attended by personnel of Gingery Associates, Inc. (the
study contractor), the Federal Insurance Administration, and the
Larimer county Planning Department on April 20, 1976. After the Big
Thompson River flood of July 31, 1976, the study scope was increased
to include the Big Thompson Canyon area.

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The U.S. Army Corps of Engineers, Omaha District, was contacted and
provided flood plain data on the Big Thompson and the Cache La
Poudre Rivers for use in preparing the Flood Insurance Study.

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During the course of the work by the study contractor, flood eleva-
tions, flood boundaries and floodway delineations were reviewed with
community officials.

Final coordination meetings were held in Loveland and Fort Collins
on November 29 and 30, 1977, respectively. These meetings were
attended by representatives of Larimer County, the Federal Insurance
Administration, the study contractor, and the general public. The
results of these meetings have been incorporated into this report.

1.3 Authority and Acknowledgments

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

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The hydrologic and hydraulic analyses for this study were performed
by Gingery Associates, Inc., for the Federal Insurance Administration,
under Contract No. H-4017. This work, which was completed in
December 1977, covered all significant flooding sources affecting
the unincorporated areas of Larimer county.

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