I-275 NB over 31st Street South
FairPinellas County, Florida · 2.6MI N of SR-682 · Structure no. 150174
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 256 ft
- 3 main spans
- Daily traffic
- 51,750
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-275 NB over 31st Street South is a steel continuous stringer/multi-beam or girder carrying I-275 NB over 31st Street South in Pinellas County, Florida. It was built in 1980, so it is 45 years old, older than the Florida average of 41.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 51,750 vehicles a day, roughly 7% of them trucks, projected to reach 89,786 by 2042. The structure is 256 ft (78.1 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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-275 NB over 31st Street South built?
It was built in 1980, making it 45 years old in 2025.
What condition is I-275 NB over 31st Street South in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does I-275 NB over 31st Street South carry?
About 51,750 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is I-275 NB over 31st Street South?
The structure is 256 ft (78.1 m) long with a longest span of 128 ft (38.9 m) and a deck 58 ft wide.
Who owns I-275 NB over 31st Street South?
It is owned by the State Highway Agency.