FLOOD02127

• County: Boulder
• Community: Boulder
• Stream Name: Bear Canyon Creek
• Basin: South Platte
• Title: LOMR - Affected Panel 535F, 555 G - Case No. 03-08-0410P
• Date: 4/15/2004
• Prepared For: Boulder
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

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Federal Emergency Management Agency
Washington, D.C. 20472
NOV 28 2003

CERTIFIED MAIL
, RETURN RECEIPT REQUESTED

IN REPLY REFER TO:
Case No.: 03-08-04IOP

The Honorable William R. Toor
Mayor, City of Boulder
1777 Broadway
Boulder, CO 80306

Community: City of Boulder, CO
Community No.: 080024
Panels Affected: 08013C0535 F and 0555 G
Effective Date of
This Revision: APR 1 5 2004

102-I-A-C

Dear Mayor T oor:

This responds to a request that the Department of Homeland Security's Federal Emergency Management
Agency (FEMA) revise the effective Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS)
report for Boulder County, Colorado and Incorporated Areas (the effective FIRM and FIS report for your '
community), in accor4ance with Part 65 of the National Flood Insurance Prograin (NFIP) regulations. In a
letter dated May 7, 20ro" Ms.'Nancy Boudreau Love, CEO, Love & Associates, Inc., requested that FEMA
revise the FIRM and FIS report to show the effects of the Williams Village development along Bear
Canyon Creek from approximately 200 feet upstream of Baseline Road to just upstream of U.S.
Highway 36 (US36). The development included grading in and adjacent to Bear Canyon Creek and
placement of fill along the channel banle This request follows up on a Conditional Letter of Map Revision
issued.on.May-IO,.2002.

This area was revised by two Letters of Map Revision (LOMRs) that became effective on February 27,
2003 (Case No. 02-08-340P), and October 10, 2003 (Case No. 03-08-0493X). The February 27 LOMR
revised FIRM Panels 08013C0415 F, 08013C0535 F, and 08013C0555 G to incorporate more detailed
flood hazard infonnation along Bear Canyon Creek from Foothills Parkway (State Highway 157) to the
upstream corporate boundary of the City of Boulder. The October 10 LOMR modified the February 27
LOMR to more accurately show on annotated FIRM Panel 080 13C053 5 F the boundary delineations of the
flood having a I-percent chance of being equaled or exceeded in any given year (base flood) and the
regulatory floodway along Bear Canyon Creek from just downstream of Stanford A venue to Lehigh Street.

All data required to complete our review of this request were submitted with letters from Mr. Alan Taylor,
Utilities Project Manager, Department of Public Works, City of Boulder, and Ms. Love.

We have completed our review of the submitted data and the flood data shown on the effective FIRM and
in the effective FrS report. We have revised the FIRM and FrS report to modifY the elevations and
floodplain and floodway boundary delineations of the base flood through the revised reach of Bear Canyon
Creek. As a result of the modifications, the Base Flood Elevations (BFEs) for Bear Canyon Creek and the
widths of the Special Flood Hazard Area (SFHA), the area that would be inundated by the base flood, and
the regulatory flood way increased in some areas and decreased in other areas. The modifications are
shown on the enclosed annotated copies of FIRM Panels 080\3C0535 F and 08013C0555 G, Profile
Panels 15P and 16P, and affected portions of the Floodway Data Table. This LOMR hereby revises
effective FIRM Panel 08013C0535 F dated June 2, 1995; effective FIRM Panel 08013C0555 G dated
October 4, 2002; and the affected portions of the FrS report, also dated October 4,2002.