FLOOD10469

• County: Boulder
• Community: Boulder
• Stream Name: Fourmile Canyon Creek, Wonderland Creek
• Basin: South Platte
• Title: Request for LOMR - Boulder
• Floodplain - Doc Type: Correspondence

1.2 Authority and Coordination

This document provides the information necessary to fulfill the requirements of a LOMR
for Fourmile Canyon Creek and Wonderland Creek within the City of Boulder (City) and
Boulder County (County), Colorado. The study was performed under a contract between
Love & Associates, Inc., City, and the Urban Drainage and Flood Control District
(UDFCD). Design parameters, hydrologic method updates, hydraulic modeling
techniques, and areas to be covered in the LOMR Fourmile Canyon Creek to Wonderland
Creek were selected and approved by the City and UDFCD. The results of the study
were reviewed and approved by the City and UDFCD.

The objectives of the Fourmile Canyon Creek hydrologic and hydraulic analysis were
outlined during the kick-off meeting on July 1, 1999. Eleven progress meetings were
held during 1999 and 2000. At the request of the Project Sponsors, initial results and
assumptions were reviewed by an Independent Review Panel. As the analysis proceeded,
the City acquired new mapping and additional survey, and Wonderland Creek was added
to the hydrologic and hydraulic analysis LOMR for Fourmile Canyon Creek. The City of
Boulder undertook an extensive public review process. The process for the adoption of
the flood mapping studies included multiple Public Meetings between 1999 and 2005
concluding with the community's formal approval process as identified below:

1. Floodplain mapping and preparation - Completion May, 2005
2. Direct mailing notification by the City of Boulder to all property owners within
either floodplain identifying impacts to properties in both streams - Completed
July, 2005
3. Open House for community to review and provide public input on both
floodplain/floodway studies - Meeting held July 20, 2005
4. Compilation and review of all public feedback received - Completed
July/August 2005
5. Water Resource Advisory board (WRAB) review and recommendation - Meeting
held on August 9, 2005
6. Planning Board review and recommendation - Meeting held on November 17,
2005
7. City Council review and approval for submittal of floodplain studies to FEMA -
Meeting held on December 20, 2005
8. FEMA application and review for mapping adoption - Submitted to FEMA -
April, 2006

The study was coordinated with the Public Works Department, the Planning Department
of the City, as well as Dave Webster, Boulder County's Floodplain Administrator, and
with the Urban Drainage and Flood Control District (UDFCD), who was a Project
Sponsor for the studies.

Information on the regulatory floodplain was obtained from the current Flood Insurance
Rate Map (FIRM), Community Panel Numbers 08013C0385F, 08013C0395F, and
08013C0415F (FEMA, 1995).

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