SR821 NB Heft 3.1 over SW 312 ST Campbell DR
GoodMiami-Dade County, Florida · 9.7 Miles South of US-1 · Structure no. 870390
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 331 ft
- 4 main spans
- Daily traffic
- 37,800
- 2024 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
SR821 NB Heft 3.1 over SW 312 ST Campbell DR is a prestressed concrete stringer/multi-beam or girder carrying SR821 NB Heft 3.1 over SW 312 ST Campbell DR in Miami-Dade County, Florida. It was built in 1973, so it is 52 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 37,800 vehicles a day, roughly 6% of them trucks, projected to reach 65,583 by 2042. The structure is 331 ft (100.9 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR821 NB Heft 3.1 over SW 312 ST Campbell DR built?
It was built in 1973, making it 52 years old in 2025.
What condition is SR821 NB Heft 3.1 over SW 312 ST Campbell DR 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 February 2024.
How much traffic does SR821 NB Heft 3.1 over SW 312 ST Campbell DR carry?
About 37,800 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is SR821 NB Heft 3.1 over SW 312 ST Campbell DR?
The structure is 331 ft (100.9 m) long with a longest span of 90 ft (27.4 m) and a deck 72 ft wide.
Who owns SR821 NB Heft 3.1 over SW 312 ST Campbell DR?
It is owned by the State Toll Authority.