WHAT WE DO

Floodplain Engineering / Management

HHR has experience with various issues related to floodplain management. Our floodplain engineering projects vary in size from simple BFE determinations for subdivisions, to CLOMR/LOMR submittals based on complex revisions to hydrology, hydraulic structures, and floodways. Our floodplain engineering complements our other services related to transportation and land development. For local governments, HHR has assisted with floodplain ordinance review, multi-jurisdictional hazard mitigation planning, and other floodplain management issues. HHR has expertise preparing community hazard mitigation plans in order to be eligible for a Hazard Mitigation Assistance (HMA) program grant from FEMA and to earn the Community Rating System (CRS) flood insurance premium rate discounts.

 

Floodplain Engineering

  • Watershed hydrology and analysis
  • Floodplain mapping for existing and future conditions
  • Floodway and encroachment limit determinations
  • Bridge and culvert hydraulics
  • Channel improvements
  • Stormwater management (detention, retention, water quality)
  • Floodplain impact analysis
  • Bridge Scour Analysis
  • Master planning

NFIP-related Submittals

  • MT-1: CLOMA, LOMA, CLOMR-F, LOMR-F
  • MT-2: CLOMR/LOMR
  • Floodway No Impact analysis and certification
  • Base Food Elevation (BFE) determinations & permitting coordination