La 23 over Intercoastal Waterway
Plaquemines Parish, Louisiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- La 23 over Intercoastal Waterway in Plaquemines Parish, Louisiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2024, making it 1 years old at the 2025 inventory.
- It carries about 39,114 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 6 of the 35 inventoried bridges in Plaquemines Parish rated good (17.1%); 7 (20.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It does not appear under this structure number in the 2024 inventory (a new or renumbered structure).
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (29.87479, -90.01286)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 9 | Excellent condition |
| Superstructure | 9 | Excellent condition |
| Substructure | 9 | Excellent condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 3,401 ft |
| Location | 3.6 SE of US-90B |
| NBI structure number | 023800000023801 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Plaquemines Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| LA0023 over Algiers Outfall C | 1968 | 29,088 | Fair |
| LA0023 over I C Waterway | 1968 | 29,088 | Fair |
| LA0023 over Bayou Barriere | 1955 | 29,088 | Fair |
| LA0023 over Algiers Outfall Canal | 1968 | 25,594 | Fair |
| LA0023 over Bayou Barriere | 1968 | 25,594 | Fair |
| LA3017 over Bayou Barataria | 1971 | 22,518 | Fair |
All bridges nearby: Plaquemines Parish, LA bridge conditions · every bridge in Plaquemines Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.