Home › Louisiana › St. Mary Parish › US0090 over La 317

US0090 over La 317

St. Mary Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory

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

US0090 over La 317 in St. Mary Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1987, making it 38 years old at the 2025 inventory.
It carries about 6,297 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 79 of the 124 inventoried bridges in St. Mary Parish rated fair (63.7%); 9 (7.3%) 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


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 1,768 ft
Location	3.98 MI W of LA 182
NBI structure number	035104240517892
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US0090 over Ramp I	1984	24,384	Good
US0090 over Ramp M	1984	24,384	Good
US0090 over Patterson Canal	1964	22,893	Good
US0090 over Charenton Canal	1978	21,000	Fair
US0090 over Drain	1973	18,127	Fair
US0090 over Barrow Canal	1964	17,736	Fair