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

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

SECTIONTHREE

Program Plan

Colorado but outside of the UDFCD). As the UDFCD currently serves as the repository for
information within their jurisdiction, the section below details the role the CWCB will fulfill as a
repository for information pertaining to areas outside of the UDFCD boundary.

Modernized NFIP Data - The CWCB will encourage communities to use DFIRM data within
their existing Geographic Information Systems (GIS) by making this information available to
them electronically. Additionally, the CWCB will work to make the information available to the
public via an Internet viewing tool. The state will also enhance their ability to access the data
more efficiently by generating a GIS tool that will allow them to track the status of flood hazards
on streams throughout the state and generate information to be used in the scoping process. The
CWCB intends to make modernized data available through the following means:

. Once FEMA has issued the DFIRM (i.e. once the DFIRM becomes effective), the CWCB
will make the GIS information available to the public in a digital format one of two ways:

o Uploading the data onto www.hazardmaps.gov. Harvard Design & Mapping Co.,
Inc, currently manages this public domain Internet site for FEMA. By uploading
relevant DFIRM information to this site we will not only be providing the data in
a public forum that everyone can access, but we will also encourage users to
become aware of other hazards that they may be exposed to.

o Providing the data to the public through a CWCB server which will allow the
public to download relevant DFIRM layers in one of the three FEMA distributed
formats: Arelnfo, ArcView, or Map Info.

. The CWCB will provide the registered raster images of the FIS and FIRM panels issued
by the GPO through a downloadable Internet connection. This information will reside on
a DNR or CWCB server.

. The CWCB will also provide the technical back-up information used to create the
DFIRM, such as hydrologic and hydraulic data, topography, workmaps, Technical
Support Data Notebook (TSDN), etc. This information will reside on a DNR or CWCB
server.

. The CWCB will upload the information to a viewer using the ESRI ArelMS software.
The aim of the ArelMS initiative is to provide citizens and interested parties with a tool
to easily view available flood hazard data, thereby increasing awareness and furthering
the education of flood risk.

. The CWCB will also use the data to populate the flood hazard tracking and scoping
support database. The intent of the scoping tool is to create a method that will help the
CWCB focus its efforts and funding in the most efficient way possible for the foreseeable
future. Through GIS the CWCB will be able to analyze flood risk throughout the state
and perform analysis and queries to assist with decision-making, the end result of which
should be an accurate an efficient process for scoping flood mapping studies.

The website for the Flood Protection Section is shown below in. Figure 3.2. Additional
information on the conceptual plans for the systems mentioned above as well as information on
how this information will be distributed through the CWCB's website can be found in
Appendix E.

Colorado Business Case Plan - March 2004

3-14