LA1156 over Mab Branch
Allen Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- LA1156 over Mab Branch in Allen Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 550 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 130 of the 178 inventoried bridges in Allen Parish rated fair (73.0%); 22 (12.4%) 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.
View this bridge on a map → (30.85392, -92.78965)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 38 ft |
| Location | 1.0 Mi. S of La 3206 |
| NBI structure number | 070208020901001 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.
Busiest bridges in Allen Parish
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US0165 over Kinder Ditch | 1932 | 11,886 | Fair |
| US0165 over Drainage Ditch | 2002 | 11,886 | Good |
| US0165 over Kinder Canal | 1932 | 11,886 | Fair |
| US0165 over Drainage Ditch | 2002 | 11,886 | Fair |
| US0165 over Drainage Ditch | 2000 | 11,886 | Fair |
| US0165 over Drain | 1931 | 11,886 | Fair |
All bridges nearby: Allen Parish, LA bridge conditions · every bridge in Allen Parish · Louisiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.