FLOOD01896

• County: Larimer
• Community: Larimer County and Unincorporated Areas
• Stream Name: Big Thompson River
• Title: LOMR - Affected Panel 080101 0244, 0244 B - Case No. 97-08-150P
• Date: 9/8/1997
• Prepared For: Larimer County
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

Federal Emergency Management Agency
Washington, D.C. 20472

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

IN REPLY REFER TO:
Case No.: 97-08-150P

The Honorable Jim Disney
Chairman, Larimer County Board
of Commissioners
P.O. Box 1190
Fort Collins, Colorado 80522

Community: Larimer County, Colorado
Community No.: 080101
Panels Affected: 0244 Band 0244
Ef~ective.~ate of SE PO 8 1997
This RevIsIOn:

102-I-A-C

Dear Mr. Disney:

This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective
Flood Insurance Rate Map (FIRM), Flood Boundary and Floodway Map (FBFM), and Flood Insurance Study
(FIS) report for your community in accordance with Part 65 of the National Flood Insurance Program (NFlP)
regulations. In a letter dated January 22, 1997, Mr. Donald N. Taranto, P.E., Principal, TST, Inc., requested
that FEMA revise the FIRM, FBFM, and FIS report to show the effects of more detailed topographic
information along the Big Thompson River from approximately 1,340 feet downstream of West First Street
to approximately 710 feet downstream of Wilson Avenue. The more detailed topographic information was
based on data entitled "Request for a Conditional Letter of Map Revision for the Big Thompson River, "
prepared by Galloway, Romero & Associates, dated August 1996, submitted to support a Conditional Letter
of Map Revision (CLOMR) request (Case No. 96-08-363R) and the study entitled "Big Thompson River"
prepared by Resource Consultants, Inc., dated December 1981. The revised existing conditions hydraulic
model from the Galloway, Romero & Associates study and more detailed topographic information from both
documents were used as the basis for this revision request.

All data required to complete our review of this request were submitted with letters from Mr. Richard A.
Dvorak, TST, Inc.

We have completed our review of the submitted data and the flood data shown on the effective FIRM, FBFM,
and FlS report. We have revised the FIRM, FBFM, and FlS report to modify the floodplain and floodway
boundary delineations and zone designations of the flood having a I-percent chance of being equaled or
exceeded in any given year (base flood) along the Big Thompson River. As a result of the modifications, the
base flood elevations (BFEs) for the Big Thompson River increased in some areas and decreased in other
areas; the width of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood,
increased in some areas and decreased in other areas; and the width of the regulatory floodway increased in
some areas and decreased in other areas. The modifications are shown on the enclosed annotated copies of
FIRM Panel(s) 0244 B, FBFM Panel(s) 0244, Profile Panel(s) lOP through 13P, and affected portions of the
Floodway Data Table. This Letter of Map Revision (LOMR) hereby revises the above-referenced panel(s)
of the effective FIRM and FBFM, both dated April 2, 1979, and the affected portions of the FlS report dated
July 17, 1997.

Because this revision request also affects the City of Loveland, a separate LOMR for that community was
issued on the same date as this LO MR.