FLOOD11043

• County: Statewide
• Basin: Statewide
• Title: Map Modernization Implementation Plan for Colorado
• Date: 8/1/2002
• Prepared For: FEMA Region 8
• Prepared By: CWCB, UDFCD
• Floodplain - Doc Type: Educational/Technical/Reference Information

Mapping Plan for Colorado

that the State Floodplain Mapping Coordinator will be able to fulfill these responsibilities cooperatively
with the Urban Drainage & Flood Control District.

1.3 Mapping Needs Assessment and Priority Setting Approach

To fully evaluate floodplain mapping needs in Colorado, the Colorado Water Conservation Board
performed a mapping needs assessment in June, July and August 2002. This mapping needs assessment
included the following tasks:

. Soliciting mapping needs information from counties and communities;

. Reviewing available community-specific data;

. Reviewing the information in the FEMA Mapping Needs Update Support System (MNUSS);

. Assigning map upgrade methods and priorities to each county; and

. Assessing whether the proposed map update options would achieve the GPRA performance
measures and revise the map update methods accordingly.

The most significant effort in this mapping needs assessment was devoted to the gathering of data and
analysis of data to carry out the CWCB's mapping needs prioritization methodology. That methodology
is described in detail later in this report. A separate portion of this mapping needs assessment was
undertaken in cooperation with, and with the support of FEMA and FEMA's Flood Map Production
Coordination Contractor (MCC). The following data was collected and assessed on a county-by-county
basis:

. Age of the existing maps;
. Known mapping needs as recorded in the FEMA Mapping Needs Update Support System
(MNUSS);
. Status of existing maps (digital, manual, none);
. Existing or potential local mapping partners;
. Number of unmapped, floodprone communities;
. Number of communities;
. Availability of existing base map, topographic data, and/or flood hazard data (including data from
other State agencies);
. Number of Letters of Map Change processed during the last 10 years;
. Population and population growth (U.S. Census figures);
. Flood insurance claims and/or repetitive losses;
. Availability of State and/or local funding;
. Format of existing maps (countywide or community-based format); and
. Ongoing map updates, including updates being undertaken by regional agencies or communities
under the Cooperating Technical Partners (CTP) Program.

The CWCB believes that the results of its prioritization methodology provides appropriate guidance for
vest meeting Colorado's specific floodplain mapping needs.

A complete listing of the data collected for Colorado is provided in the Appendices.

12/26/2002

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