Three Forks, Montana Flood Zones
Last updated: March 2026
Three Forks is located at the Missouri River headwaters where the Jefferson, Madison, and Gallatin rivers converge. This triple-river confluence creates elevated flood risk during spring snowmelt from the surrounding mountain ranges.
Gallatin County has recorded 76 NFIP flood insurance claims since 1978, totaling $340K in payouts. Explore the full NFIP claims data by state and county to see how this area compares nationally.
FEMA Region
Region 8
NFIP Policies
456
Gallatin County
Avg. Premium
$705/yr
Gallatin County
FEMA Flood Risk Profile: Gallatin County
Based on FEMA's National Risk Index, which evaluates flood risk at the county level using historical loss data, exposure, and vulnerability.
Inland Flood Risk
Relatively LowEst. annual loss: $15.5M
Source: FEMA National Risk Index, county-level assessment. Individual property risk may vary.
Federal Flood Disaster History: Gallatin County
Gallatin County has been included in 2 federal flood-related disaster declarations.
These declarations affected communities across Gallatin County, including Three Forks.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced February 2026.
NFIP Flood Insurance Claims: Gallatin County
Properties in Gallatin County have filed 76 NFIP flood insurance claims totaling $340K in payouts since 1978. The average claim payout is $4K.
Highest-Claim Years
1997
13 claims - $63K
1981
10 claims - $24K
2011
9 claims - $31K
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced March 2026. See national claims data.
Flood Insurance Coverage: Gallatin County
An estimated 1.0% of households in Gallatin County carry NFIP flood insurance. This county has elevated flood risk but very low insurance coverage, indicating a significant protection gap.
Penetration Rate
1.0%
Claims Ratio
1 in 6
policies have filed a claim
Avg. Claim Payout
$4,474
Derived from FEMA NRI population data and OpenFEMA NFIP policy/claims records.
Repetitive Loss Properties: Gallatin County
Gallatin County has 1 properties with multiple flood losses, including 0 severe repetitive loss properties.
Multiple Loss
1
Severe Rep. Loss
0
Mitigated
0
By Flood Zone
Source: OpenFEMA NFIP Multiple Loss Properties. Data sourced March 2026.
Recorded Flood Events: GALLATIN County
NOAA has recorded 12 flood events in GALLATIN County since 1996, causing $1M in damage.
Costliest Events
Events by Type
Source: NOAA Storm Events Database, 1996-2026. Data sourced March 2026.
Flood Mitigation: Gallatin County
FEMA has funded mitigation for 9 properties in Gallatin County, investing $0 in flood risk reduction.
By Action Type
Source: OpenFEMA Hazard Mitigation Assistance. Data sourced March 2026.
What Your Flood Zone Means in Three Forks
Three Forks faces flood risk primarily from river and stream overflow during heavy rainfall, snowmelt, or upstream dam releases. When rivers exceed their banks, floodwaters spread across low-lying areas mapped in AE and A zones. The most common FEMA flood zone designations in Three Forks are Zone AE, Zone X. FEMA's National Risk Index estimates the county's annual expected loss from inland flooding at over $15.5M.
Riverine flood risk in Three Forks is driven by the proximity and elevation of properties relative to nearby waterways. Properties closer to rivers with lower ground elevations typically face higher flood insurance premiums under FEMA's Risk Rating 2.0. If your property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance.
River flood maps can change when FEMA conducts new Flood Insurance Studies or when development alters drainage patterns. Letters of Map Amendment (LOMA) can remove individual properties if the natural ground elevation was always above the Base Flood Elevation and the property was inadvertently mapped in the SFHA. Use our free lookup tool to check the current flood zone for any Three Forks address.
Flood Insurance Discount: Three Forks
Three Forks participates in FEMA's Community Rating System (CRS), a voluntary program that rewards communities for flood mitigation efforts beyond minimum NFIP requirements. Residents in the Special Flood Hazard Area may qualify for reduced flood insurance premiums.
CRS Class
Class 8
SFHA Premium Discount
10% off
CRS classes range from 1 (best) to 10 (no discount). Three Forks's Class 8 rating means NFIP policyholders in the SFHA can receive up to a 10% discount on their flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Source: FEMA Community Rating System, October 2025. Discounts apply to NFIP policies only.
Three Forks, MT Flood Zone FAQ
What flood zones are in Three Forks, MT?
The most common FEMA flood zones in Three Forks are Zone AE, Zone X. Properties in these high-risk zones (SFHA) may require flood insurance with a federally regulated or government-backed mortgage.
Is flood insurance required in Three Forks?
If your Three Forks property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance. Properties in Zone X are not federally required to carry flood insurance, though coverage is still recommended since over 40% of all NFIP flood claims come from Zone X properties.
How do I check my flood zone in Three Forks?
Enter your Three Forks address in the search tool above for an instant flood zone determination. Results include your FEMA flood zone, SFHA status, base flood elevation (if available), and FIRM panel information, pulled directly from FEMA's National Flood Hazard Layer.
Does Three Forks offer flood insurance discounts?
Yes. Three Forks participates in FEMA's Community Rating System (CRS) with a Class 8 rating, qualifying residents in the Special Flood Hazard Area for up to a 10% discount on NFIP flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Has Three Forks experienced major flooding events?
Gallatin County, where Three Forks is located, has been part of 2 federal disaster declarations for flooding, hurricanes, or severe storms. The most recent was Hurricane Katrina Evacuation in 2005. Federal disaster declarations are issued when flooding overwhelms local resources and triggers FEMA assistance programs.
How many flood insurance claims have been filed in Three Forks?
Gallatin County has recorded 76 NFIP flood insurance claims totaling $340K in payouts since 1978. The year with the most claims was 1997, with 13 claims and $63K in payouts. These figures cover all NFIP claims in the county, including Three Forks.
How many flood insurance policies are active in Three Forks?
Gallatin County currently has 456 active NFIP flood insurance policies with an average annual premium of $705. The most policies are in Zone AE (255 policies). These figures cover all active NFIP policies in the county.
How many Three Forks properties have flooded repeatedly?
Gallatin County has 1 properties with multiple flood losses on record, including 0 severe repetitive loss properties. These are properties that have experienced four or more NFIP claims of $5,000+ or two claims exceeding the building value.
Can my Three Forks property be removed from a high-risk flood zone?
Yes, if your property's natural ground elevation is above the Base Flood Elevation and FEMA inadvertently mapped it in a high-risk zone, you can apply for a Letter of Map Amendment (LOMA). A successful LOMA removes the property from the Special Flood Hazard Area, generally eliminating the federal mandatory flood insurance requirement. You will need an elevation certificate from a licensed surveyor. If a property was raised above the BFE with fill material, the process is a LOMR-F rather than a LOMA.
What is Base Flood Elevation in Three Forks?
Base Flood Elevation (BFE) is the predicted height of floodwaters during a 1% annual chance (100-year) flood, shown on FEMA maps as an elevation number in feet above sea level. In Three Forks's Zone AE areas, BFE lines appear on the FIRM as wavy contours labeled with elevation values. Properties with a lowest floor at or above the BFE typically qualify for significantly lower NFIP flood insurance premiums.
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Look Up Any Three Forks, MT Address
Enter a Three Forks, MT address to instantly check its FEMA flood zone designation, SFHA status, and insurance requirements.
Disclaimer: Flood risk data on this page is sourced from FEMA datasets including the National Risk Index, NFIP claims and policy records, disaster declarations, and the Community Rating System. These datasets were last extracted on March 2026 and may not reflect the most recent changes. This page is for informational purposes only and is not a certified flood zone determination. Always verify current flood zone status through FEMA or a licensed determination provider before making property, insurance, or lending decisions.