Flood Map Modernization is a multiyear Presidential initiative
supported by Congress that is directed at improving and updating
the Nation’s flood hazard identification maps. These
flood maps have been produced and used for 35 years under
the National Flood Insurance Program (NFIP), originally for
the identification and depiction of flood hazard areas in communities
and for setting flood insurance rates. However, they
have come to be much more widely used for many purposes,
including local planning, emergency preparedness and response,
and natural resource management.
The modernization of the flood maps, which had been produced,
printed, and distributed with traditional paper mapmaking
methods, had its origins in the National Flood Insurance
Reform Act of 1994 (P.L. 103-325). Funding for Flood
Map Modernization was first appropriated in fiscal year (FY)
2003, with additional funding provided in FY2004, FY2005,
and FY2006.
The Flood Map Modernization Mid-Course Adjustment
As the Flood Map Modernization initiative reached the halfway
point, FEMA performed a mid-program evaluation that
considered input from Congress, the U.S. Government Accountability
Office (GAO), the Department of Homeland Security’s
Inspector General (IG), and other stakeholders. Progress
towards initiative goals has been assessed, and FEMA is
making changes in its implementation of the initiative that
will result in better-targeted and more accurate flood data,
while also producing digital flood maps for a significant portion
of the Nation. The results of that evaluation are presented
in a report entitled:
Flood Map Modernization Mid-Course
Adjustment.
The NFIP and Levees
The United States has thousands of miles of levees, which are manmade structures, usually earthen embankments,
that are designed and constructed in accordance with sound engineering practices to contain, control,
or divert the flow of water so as to provide protection from temporary flooding. They date back as much as
150 years. Others have been designed to protect urban areas, and were typically built to higher standards
used by the U.S. Army Corps of Engineers. However, no levee provides full protection from flooding.
As part of its Flood Map Modernization efforts, FEMA works with Federal, State, local, professional,
and technical partners to identify and map the risk of flooding behind levees. FEMA encourages
property owners to understand their flood risk, obtain flood insurance and always adhere
to local evacuation procedures.
Please click on one of the links below to find out more about levees:
Multi-Year Flood Hazard Identification Plan (MHIP)
September 2006, Version 2.0
The Multi-Year Flood Hazard Identification Plan (MHIP) describes the strategy, schedule, and
budget developed by FEMA for producing flood hazard data and maps to administer the National
Flood Insurance Program (NFIP). It is a living document that is updated annually through a collaborative
process to engage stakeholders.
What's New in Flood Hazard Mapping
Provisionally Accredited Levees
FEMA issued Procedure Memorandum No. 43 (PM 43), Guidelines for Identifying Provisionally
Accredited Levees, on September 25, 2006. PM 43 provides guidance on showing
flood hazards for areas behind levees on Flood Insurance Rate Maps and clarifies procedures
and timelines for levee documentation.
Letter of Final Determination (LFD) Available Online
The Letter of Final Determination (LFD)is a letter sent to a community stating that a new
Flood Insurance Rate Map (FIRM) will go effective in six months and each participating,
floodprone community compliant floodplain management ordinance must be adopted by
that effective date.