I-75 SB over SR-821
GoodMiami-Dade County, Florida · 0.5MI S of Broward CO LN · Structure no. 870597
- Built
- 1984
- 41 years old, rebuilt 2017
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 336 ft
- 4 main spans
- Daily traffic
- 74,500
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-75 SB over SR-821 is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over SR-821 in Miami-Dade County, Florida. It was built in 1984 and reconstructed in 2017, so it is 41 years old, younger 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 74,500 vehicles a day, roughly 2% of them trucks, projected to reach 129,258 by 2042. The structure is 336 ft (102.4 m) long and 83 ft wide. If it were closed, the detour would be 1.9 mi (3 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 I-75 SB over SR-821 built?
It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2017.
What condition is I-75 SB over SR-821 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 August 2024.
How much traffic does I-75 SB over SR-821 carry?
About 74,500 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is I-75 SB over SR-821?
The structure is 336 ft (102.4 m) long with a longest span of 115 ft (35.2 m) and a deck 83 ft wide.
Who owns I-75 SB over SR-821?
It is owned by the State Highway Agency.