Bridge conditions in St. John the Baptist Parish, Louisiana
40 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 40 bridges the federal inventory lists in St. John the Baptist Parish are rated poor; the rest split 13 good and 26 fair.
- 1 of the 40 bridges in St. John the Baptist Parish, Louisiana, are rated in poor condition (2.5%) in the 2025 National Bridge Inventory, as of .
- 13 bridges (32.5%) are rated good and 26 (65.0%) fair.
- The median St. John the Baptist Parish bridge was built in 1975.
Good 32.5% · Fair 65.0% · Poor 2.5% of 40 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 |
|---|---|---|---|
| Hope Canal Rd over Hope Canal | 1965 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0010 over US 51 & Swamps | 1972 | 48,723 | Fair |
| I0010 over Hope Canal | 1975 | 44,074 | Fair |
| I0010 over Mississippi Bayou | 1975 | 44,074 | Fair |
| I0010 over Reserve Relief Canal | 1974 | 44,074 | Fair |
| I0055 over Swamp | 1975 | 28,021 | Good |
| I0055 over Swamp | 2008 | 27,551 | Fair |
| I0055 over Swamp | 2008 | 27,551 | Fair |
| I0010 over Hope Canal | 1975 | 27,551 | Fair |
| I0010 over Mississippi Bayou | 1975 | 27,551 | Fair |
| I0010 over Reserve Relief Canal | 1974 | 27,551 | 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.