FLOOD04440

• County: Statewide
• Community: All
• Stream Name: All
• Basin: Statewide
• Title: Colorado Flood Map Modernization Business Case Plan - March 2004
• Date: 3/1/2004
• Prepared For: FEMA
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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SECTIONTHREE

Program Plan

3.1.9.1 Urban Drainage and Flood Control District

The seven counties in the District include one county that is entirely within its jurisdiction (City
and County of Denver), one county that is almost entirely within its jurisdiction (City and
County of Broomfield) and five counties that are partially within its jurisdiction (Adams,
Arapahoe, Boulder, Douglas and Jefferson). CWCB staff has already proposed to UDFCD staff
that the District might manage the preparation of DFIRMs for the entire county of the six
counties not entirely within the District, not just the portions within the District. The UDFCD
staff expressed interest in serving that study manager function, with the exception of Boulder
County since the current DFIRM study is being managed by the CWCB at this time. The District
is an experienced CTP entity and the staff at the District already has a working relationship with
local floodplain managers for the six counties (in addition to Denver). Those factors place
Colorado into an enviable position of having a state agency that is a CTP and an internationally
recognized flood control district that is also a CTP. Both CTP's in Colorado are interested in
participating actively in the preparation of high quality floodplain mapping that serves local,
regional, state and federal needs. In fact, the District is already doing some of this work.

Approximately half of the population of Colorado lives within the District's boundaries and
would benefit directly from this proposed partnership. In addition, if the District is willing to
take on the management function for the non-District portions of the counties mentioned above,
a very large part of the management of Colorado Map Modernization effort could be undertaken
by an entity other than CWCB. That partnership would greatly enhance CWCB capabilities.

3.1.9.2 CWCS's Partnerships with Local Governments and the Public

Since the inception ofthe Map Modernization concept the CWCB has worked to establish strong
local partnerships as a foundation for our map modernization program. A summary of CWCB
efforts to date, proposed outreach efforts directly related to DFIRM projects, and additional
proposed outreach efforts is listed below:

Outreach to Date

. For the original outreach effort CWCB contacted all 64 counties within Colorado, as part
of the 2002 MMIP project, to solicit their input on the accuracy of their current flood
hazard maps. For this effort a survey was distributed and the results were tabulated in a
database that can be referenced for future scoping and restudy efforts. Topics addressed
included new developments or construction within the floodplain, the availability of
existing topographic, hydrologic, or hydraulic data, and the community's assessment of
the need for new topographic, hydrologic, and/or hydraulic data to be developed.

. The CWCB and its consulting team on the MMIP (PBS&J and Moser Associates)
conducted regional workshops during the summer of 2002 to provide a forum for
information exchange related to Map Modernization efforts. Every county and
community in Colorado was invited to attend a workshop, with attendance by a
significant number of community officials.

. The CWCB currently conducts "Floodplain Management 101" workshops, in cooperation
with the Colorado Association of Stormwater and Floodplain Managers (CASFM), to
assist local floodplain managers.

Colorado Business Case Plan - March 2004

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