Texas Porch
Floodplain Practical

Floodplain Permits Go Through Road & Bridge in Harrison County

Big Cypress Bayou and its tributaries spread across low ground in Harrison County. A lot can look buildable and still sit in a mapped floodplain. If it does, a house, shop, or fill dirt may need a floodplain permit before work starts.

The permit is how the county checks elevation and flood rules. It can affect where the structure goes and what flood insurance conversation comes later. For land near a creek or low spot, learn this before closing.

The County Engineer handles floodplain permits through Road and Bridge at 3800 Five Notch Road in Marshall. Inside a city, ask the city too.

Content last revised 2026-07-11

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