Bridge conditions in St. Mary Parish, Louisiana
124 inventoried bridges · 9 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
9 of the 124 bridges the federal inventory lists in St. Mary Parish are rated poor; the rest split 36 good and 79 fair.
- 9 of the 124 bridges in St. Mary Parish, Louisiana, are rated in poor condition (7.3%) in the 2025 National Bridge Inventory, as of .
- 36 bridges (29.0%) are rated good and 79 (63.7%) fair.
- The median St. Mary Parish bridge was built in 1977.
- The busiest poor-rated bridge is LA0182 over Atchaf.r/berwick Bay (built 1933), carrying about 12,788 vehicles a day.
Good 29.0% · Fair 63.7% · Poor 7.3% of 124 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| LA0182 over Atchaf.r/berwick Bay | 1933 | 12,788 | Poor |
| LA0083 over Bayou Choupique | 1978 | 10,148 | Poor |
| US0090 over Wax Lake Outlet | 1975 | 10,035 | Poor |
| US0090 over Bayou Ramos | 1994 | 10,035 | Poor |
| US0090 over Bayou Ramos | 1994 | 7,885 | Poor |
| US0090 over Ramos Bayou | 1932 | 7,504 | Poor |
| LA0182 over Charenton | 1941 | 6,242 | Poor |
| LA0324 over Bayou Teche | 1941 | 883 | Poor |
| LA0087 over Creek | 1952 | 9 | Poor |
Busiest bridges in the county
| 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 |
| US0090 over Choupique Bayou | 1978 | 16,253 | Fair |
| US0090 over La 83 S.p. RR | 1978 | 16,253 | Good |
| LA0182 over Atchaf.r/berwick Bay | 1933 | 12,788 | Poor |
| Us0090-w over BNSF | 1997 | 12,788 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Louisiana: Louisiana bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.