Extensive experience in floodplain management has earned TRWE a reputation as a valuable resource in providing solutions to a vast array of floodplain related issues. The team has addressed everything from localized matters to complex, multi-faceted projects. Regardless of the size of the plans, compliance with regulatory agencies is necessary, and partnering with TRWE will ensure advancement with adherence to all Federal, State, and local regulations.

FEMA’s National Flood Insurance Program (NFIP) has undergone significant changes over the past few years. Beginning with Hurricane Katrina in 2005, a number of severe storms have shaped legislation and policy, culminating in the Flood Insurance Reform Act of 2012 (aka Biggert-Waters). Staying abreast of these changes is time-consuming, but necessary for successful floodplain management.

Equally important is the technical expertise needed for accurate floodplain modeling and design of riverine systems and flood control structures. Encroachment within floodplains requires this combination of technical expertise and understanding of rules governing floodplains and modifications therein. TRWE has a long history of analyzing floodplains and preparing and processing requests for changes to flood zone determinations. These requests and accompanying studies, when required, range from encroachment or flood control work within large rivers with Letters of Map Revision (LOMR) and Conditional Letters of Map Revision (CLOMR), to single lot Letters of Map Amendment (LOMA) or Letters of Map Revision Based on Fill (LOMR-F).

Floodplain Subservices

  • Floodplain Studies & Mapping
  • FEMA/NFIP Applications (LOMRs, LOMAs, LOMR-Fs)
  • Hydraulic Modeling
  • Dam Breach Analysis
  • Inundation Mapping
  • Alluvial Fan Flood Planning