FEMA flood map notices
Flood map changes in Lewis and Clark County, Montana
FEMA has published 2 flood hazard notices covering Lewis and Clark County, Montana since November 2023. The most recent, map revision flood hazard determinations, was published Apr 29, 2024.
Notices for Lewis and Clark County
- Apr 29, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 27 other counties
- Jan 11, 2024Map revisionChanges in Flood Hazard DeterminationsAlso covers 25 other counties
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Walker County, AL
- Washington County, AR
- Boulder County, CO
- Broomfield County, CO
- New Castle County, DE
- Charlotte County, FL
- Lee County, FL
- Miami-Dade County, FL
- Sarasota County, FL
- Cobb County, GA
- Fulton County, GA
- Essex County, MA
- Middlesex County, MA
- Suffolk County, MA
- Lincoln County, ME
- Alamance County, NC
- Buncombe County, NC
- Forsyth County, NC
- Madison County, NC
- Orange County, NC
- Rowan County, NC
- Union County, NC
- Wake County, NC
- Logan County, OK
- Bexar County, TX
- Brazos County, TX
- Collin County, TX
- Comal County, TX
- Dallas County, TX
- Denton County, TX
- Ellis County, TX
- Grayson County, TX
- Harris County, TX
- Hays County, TX
- Medina County, TX
- Midland County, TX
- Tarrant County, TX
- Travis County, TX
- Washington County, UT
- Chesterfield County, VA
- Tucker County, WV
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean