Flood Plain Information

Notice of Intent to Revise Flood Hazard Information

Notice of Intent to Revise Flood Hazard Information [posted 10/15/2020]
For the area generally located between the S. Main Street Bridge and the Seven Mile Road Bridge. The flood hazard revisions are being proposed as part of the Letter of Map Revision (LOMR) Case No. 20-05-4952P along Middle Rouge River Walled Lake Branch.

Click here to view the Notice of Intent
Maps and detailed analysis of the revision below (large files - allow for longer download time): 

01-The Downs LOMR
02-The Downs LOMR
03-The Downs LOMR
04-The Downs LOMR

Notice of Intent to Revise Flood Hazard Information [posted 3/14/2019]
For the area generally located between the S. Main Street Bridge and the Seven Mile Road Bridge.  Revisions are proposed as part of the Condition Letter of Map Revision Case No. 18-05-6128R for a proposed project along Middle Rouge River Walled Lake Branch.

Click here to view the Notice of Intent and for information on how to review maps and detailed analysis of the revision. 

Flood Plain Information
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The Federal Emergency Management Agency (FEMA) identifies a flood plain as land that has been or may be covered by floodwater during a regional flood, which has a 1% chance of occurring in any given year. Flood zones are geographic areas defined by varying levels of flood risk. These zones are depicted on a community's Flood Insurance Rate Map (FIRM) or Flood Hazard Boundary Map. Each zone reflects the severity or type of flooding in the area, based on FEMA’s reports.

In the City of Northville, the particular flood zones are A, AE and X.

Zone AE are areas that have a 1% probability of flooding every year (also known as the "100-year flood plain"). Properties in this zone are considered at high risk of flooding under the National Flood Insurance Program (NFIP), which is federally regulated. Building in an AE zone is considered to be in a Special Flood Hazard Area, and is lower than the Base Flood Elevation.

Zone X is a moderate- to low-risk area. It is depicted on a FIRM as above the 500-year flood level.