NW 74th St. 31.1 over SR821 Tpk
GoodMiami-Dade County, Florida · At Tpke-Nw 74th ST Inchg · Structure no. 870907
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 425 ft
- 3 main spans
- Daily traffic
- 6,400
- 2024 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
NW 74th St. 31.1 over SR821 Tpk is a prestressed concrete stringer/multi-beam or girder carrying NW 74th St. 31.1 over SR821 Tpk in Miami-Dade County, Florida. It was built in 2009, so it is 16 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 6,400 vehicles a day, roughly 6% of them trucks, projected to reach 11,104 by 2042. The structure is 425 ft (129.5 m) long and 61 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NW 74th St. 31.1 over SR821 Tpk built?
It was built in 2009, making it 16 years old in 2025.
What condition is NW 74th St. 31.1 over SR821 Tpk 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 March 2024.
How much traffic does NW 74th St. 31.1 over SR821 Tpk carry?
About 6,400 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is NW 74th St. 31.1 over SR821 Tpk?
The structure is 425 ft (129.5 m) long with a longest span of 145 ft (44.2 m) and a deck 61 ft wide.
Who owns NW 74th St. 31.1 over SR821 Tpk?
It is owned by the State Toll Authority.