
Building in a Floodplain - Lincoln County Montana
Lincoln County Planning Department Floodplains

Building in a Floodplain?

Are you, your structure or your property that is adjacent to a river, creek, lake, stream, or other open waterway that is subject to flooding when there is a significant rain or seasonal run-off? If you are, you can always have your property verified for FREE before you buy or before any constriction starts.
Request an Interpolation from the County here.

A floodplain permit (at a minimum) is required before construction or development begins within any Special Flood Hazard Area (SFHA); So ANY of the A Zones (A, AE, AO, etc…) or more commonly the 100-Year Floodplain. This means that there is a 1-in-100 chance in any given year that your property will flood. If it is in the 25-year floodplain, there is a 1-in-25 chance in any given year that your property will flood. The statistical chance of flooding is not changed by any one flooding event; but repeated flooding may result in the floodplain being recalculated. A 100-year floodplain is always wider than a 25-year floodplain, and the 25-year floodplain is contained within the 100-year floodplain.

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