Flood Hazard Review, No Rise, and Letters of Map Revision
Many Counties or Municipalities in the USA with Floodplains participate in the FEMA managed National Flood Insurance Program. Participation requires adherence with a variety of requirements to avoid violations of FEMA rules, regulations as part of a greater Flood Hazard Management system. These requirements reference risk maps. This affects Floodplain Restoration and particularly use of Engineered Log Jams where restoration aims to increase roughness and restore floodplain connectivity, so that more water is stored in floodplains. Map revision is referred to by the “MT2 application” which initiates the process Map Revision process. If the project increases flood elevation as defined by a model, the project must complete a process that revises the flood map, beginning with a Conditional Letter of Map Revision (CLOMR or “clow-mer”) and concluding with a Letter of Map Revision, or LOMR (Low-mer).
https://www.fema.gov/flood-maps/change-your-flood-zone/lomr-clomr
Relationships
- broader: floodplain
- broader: legal;flood management
- broader: Skagit Farm, Fish and Flood Initiative
- involves organization: federal
- related to: Puget lowland forests
- related to: Southern Resident Killer Whales
- related to: channel structure
- related to: counties
- related to: ecology
- related to: engineered log jams
- related to: fema 2023 flood risk mapping guidance
- related to: fema
- related to: floodplain management
- related to: floodplain restoration
- related to: floodplain
- related to: in-water work window
- related to: mitigation
- related to: municipalities
- related to: Watershed Science and Engineering
Source: Flood Hazard Review, No Rise, and Letters of Map Revision on Salish Sea Wiki