Matanuska-Susitna Borough

Flood Plain Development and Information

Regulatory changes to flood insurance rates and subsidized policies, will affect MAT-SU Borough property owners living in a Special Flood Hazard Area. See the attached Biggert-Waters Presentation for more information.

A Flood Plain Development Permit is required prior to rebuilding or any other development within a Federally Designated Flood Hazard Area.

To determine if your project is within a Designated Flood Hazard Area please contact the Permit Center at 745-9822 or email This email address is being protected from spambots. You need JavaScript enabled to view it. and request a “Flood Hazard Determination”. Please provide the street address, subdivision name, lot and block, or the township, range, section, and parcel number.

If your property is located within the 100 year flood, there is at least a 1% chance each year the land may be subject to a "100 year" flooding event.

In an effort to reduce losses associated with these flooding events and reduce the amount of losses, the Federal Government, through the Federal Emergency Management Agency (FEMA), requires all structures to obtain Flood Hazard Insurance. To be eligible to receive Flood Hazard Insurance all new development must conform to the minimum standards of development as described in MSB 17.29 Flood Damage Prevention.

A complete application must include both the MSB Flood Hazard Development Permit and the Elevation Certificate. A Registered Engineer or Surveyor must complete the elevation certificate.

If you have any questions please contact the Permit Center or FEMA, Federal Emergency Management Agency, directly at or 1-800-427-4661.

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Flood Damage and Prevention

Preparedness is the best way to be ready for a flood. Learn if your home is in a Flood Zone or accessed by crossing a flood zone. See our Emergency Preparedness site for how to be ready.

Attention Surveyors & MSB Residents

Past Flood Damage

Flood Damage Mitigation

Flood Damage Prevention

Flood Map Update Project (pdf 1.56 MB)   |  1178 hits

What is Risk Map? (pdf 927.69 KB)   |  453 hits

Flood Risk Products (pdf 359.76 KB)   |  392 hits

Flood Insurance and Grandfathering Rule (pdf 109.02 KB)   |  391 hits

Elevation Data Fact Sheet (pdf 180.12 KB)   |  409 hits

Community Engagement Factsheet (pdf 131.18 KB)   |  361 hits

Acronyms and Abbreviations (pdf 85.47 KB)   |  319 hits

HMA Factsheet (pdf 1.23 MB)   |  341 hits

HMA Brochure (pdf 269.39 KB)   |  331 hits

HMGP Brochure (pdf 772.25 KB)   |  326 hits

Biggert-Waters Presentation (pdf 345.77 KB)   |  336 hits