FLOOD07981

• County: Jefferson
• Community: Westminster
• Stream Name: Big Dry Creek
• Basin: South Platte
• Title: LOMR - Affected Panel 080008 0001 B, 080008 0004 B - Case No. 97-08-119P
• Date: 9/5/1997
• Prepared For: Westminster
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

t

Federal Emergency Management Agency
Washington, D.C. 20472

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

IN REPLY REFER TO:
Case No.: 97-08-1I9P

The Honorable Nancy M. Heil
Mayor, City of Westminster
4800 92nd Avenue
Westminster, Colorado 80030

Community: City of Westminster, Colorado
Community No.: 080008
Panels Affected: 0001 Band 0004 B
Effective Date of S E P 0 5 1997
This Revision:

102-I-A-C

Dear Mayor Heil:

This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective Flood
Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) report for your community, in accordance with Part
65 of the National Flood Insurance Program (NFIP) regulations. In a letter dated January 6, 1997, Mr. Gary W.
Behlen, P.E., City Engineer, City of Broomfield, requested that FEMA revise the FIRM and FIS report dated
September 28, 1990, for the City of Broomfield, Colorado, to reflect updated topographic data and to incorporate
the flood hazard information for Big Dry Creek from the FIS report dated May 17, 1993, for the City of
Westminster, Colorado. This Letter of Map Revision (LOMR) will provide contiguous flood hazard information
for the Cities of Westminster and Broomfield.

All datl\ required to complete our review of this request were submitted with letters from Mr. Behlen; Ms. Ann K.
Woods, P.E., Carroll & Lange, Inc.; Mr. David W. Loseman, P.E., L.S., Senior Projects Engineer, City of
Westminster; and Mr. Charles G. Swanson, P.E., City Engineer, City of Broomfield.

We have completed our review of the submitted data and the flood data shown on the effective FIRM and FIS
report. We have revised the FIRM and FIS report to modify the elevations and floodplain and floodway boundary
delineations of the flood having a I-percent chance of being equaled or exceeded in any given year (base flood)
along the revised reach of Big Dry Creek from approximately 2,270 feet downstream of 120th Avenue to
approximately 130 feet downstream of Zuni Street. As a result of the modifications, the base flood elevations
(BFEs) for Big Dry Creek 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 PaneI(s) 0001 Band 0004 B, Profile
Panel(s) 05P through 08P, and affected portions of the Floodway Data Table. This LOMR hereby revises the
above-referenced paneI(s) of the effective FIRM, both dated September 30, 1988, and the affected portions of the
FIS report dated April 2, 1997 (supersedes FIS report dated May 17, 1993).

"~::~

Because this revision request also affects the City of Broomfield, a separate LOMR for that community was issued
on the same date as this LOMR. A portion of the area affected by this revision is shown on the effective FIRM
for Adams County, Colorado and IncOlporated Areas. This area, shown in Adams County, has been annexed into
the City of Westminster. Since changes in the annexed area are reflected on revised FIRM Panel 0001 B for the
City of Westminster, we have not revised FIRM for Adams County, Colorado and Incorporated Areas.