N. Doyle RD over Big Branch
GoodLivingston Parish, Louisiana · 3.0 MI N/E of LA 63 Exit · Structure no. 623230304904331
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Concrete
- Length
- 76 ft
- 4 main spans
- Daily traffic
- 850
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N. Doyle RD over Big Branch is a concrete slab carrying N. Doyle RD over Big Branch in Livingston Parish, Louisiana. It was built in 1998, so it is 27 years old, younger than the Louisiana average of 43 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 850 vehicles a day, projected to reach 935 by 2042. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N. Doyle RD over Big Branch built?
It was built in 1998, making it 27 years old in 2025.
What condition is N. Doyle RD over Big Branch in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does N. Doyle RD over Big Branch carry?
About 850 vehicles per day (2022 count).
How long is N. Doyle RD over Big Branch?
The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.
Who owns N. Doyle RD over Big Branch?
It is owned by the County Highway Agency.