I0020 over Bayou Lafourche
Richland Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I0020 over Bayou Lafourche in Richland Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1968 and reconstructed in 1991, making it 57 years old at the 2025 inventory.
- It carries about 38,890 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 137 of the 204 inventoried bridges in Richland Parish rated fair (67.2%); 20 (9.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- 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.
View this bridge on a map → (32.48388, -91.9317)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 541 ft |
| Location | 4.0 Mi West of La 133 |
| NBI structure number | 054204510700271 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Richland Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I0020 over Old B Lafourche | 1968 | 38,890 | Fair |
| I0020 over Diversion Canal | 1968 | 38,890 | Fair |
| I0020 over Bayou Crew | 1968 | 38,890 | Fair |
| I0020 over Drain | 1968 | 38,890 | Fair |
| I0020 over Boeuf River | 1968 | 38,890 | Fair |
| I0020 over Drain | 1968 | 38,890 | Fair |
All bridges nearby: Richland Parish, LA bridge conditions · every bridge in Richland Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.