US-1 NB (SR-15) over Branch of Mills Creek
GoodNassau County, Florida · 5.5 Mi. N. of Callahan · Structure no. 740028
- Built
- 1956
- 69 years old, rebuilt 1998
- Condition
- Good
- inspected July 2023
- Type
- Slab
- Concrete
- Length
- 120 ft
- 6 main spans
- Daily traffic
- 7,850
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US-1 NB (SR-15) over Branch of Mills Creek is a concrete slab carrying US-1 NB (SR-15) over Branch of Mills Creek in Nassau County, Florida. It was built in 1956 and reconstructed in 1998, so it is 69 years old, older than the Florida average of 41.3 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 7,850 vehicles a day, roughly 14% of them trucks, projected to reach 13,620 by 2044. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 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 US-1 NB (SR-15) over Branch of Mills Creek built?
It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1998.
What condition is US-1 NB (SR-15) over Branch of Mills Creek 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 2023.
How much traffic does US-1 NB (SR-15) over Branch of Mills Creek carry?
About 7,850 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is US-1 NB (SR-15) over Branch of Mills Creek?
The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.
Who owns US-1 NB (SR-15) over Branch of Mills Creek?
It is owned by the State Highway Agency.