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SR 609 over Old Fort Bayou

Jackson County, Mississippi · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

SR 609 over Old Fort Bayou in Jackson County, Mississippi, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1984, making it 41 years old at the 2025 inventory.
It carries about 35,000 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 74 of the 270 inventoried bridges in Jackson County rated fair (27.4%); 8 (3.0%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings

Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.

Bridge	Built	Vehicles/day	Condition
I 10 over Stream	1977	45,000	Fair
I 10 over Stream	2000	45,000	Good
I 10 over SR 609	1970	39,500	Good
I 10 over SR 609	1970	39,500	Good
US 90 over West Pascagoula River	2002	33,000	Fair
US 90 over East Pascagoula River	2003	33,000	Good