US Bridges

I-275 NB over CSX RR

Good

Pinellas County, Florida · 0.3 MI S of 22nd Ave N · Structure no. 150116

Built
1975
50 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
461 ft
5 main spans
Daily traffic
79,250
2023 count
Owner
State
State Highway Agency

About this bridge

I-275 NB over CSX RR is a prestressed concrete stringer/multi-beam or girder carrying I-275 NB over CSX RR in Pinellas County, Florida. It was built in 1975, so it is 50 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 79,250 vehicles a day, roughly 7% of them trucks, projected to reach 137,499 by 2042. The structure is 461 ft (140.6 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-275 NB
CrossesCSX RR
Location0.3 MI S of 22nd Ave N
RouteInterstate 275
CountyPinellas County
StateFlorida
Coordinates27.78639, -82.66089
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length461 ft (140.6 m)
Longest span102 ft (31.1 m)
Deck width71 ft (21.7 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79,250 (2023)
Projected traffic137,499 by 2042
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-275 NB over CSX RR built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-275 NB over CSX RR 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 October 2023.

How much traffic does I-275 NB over CSX RR carry?

About 79,250 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-275 NB over CSX RR?

The structure is 461 ft (140.6 m) long with a longest span of 102 ft (31.1 m) and a deck 71 ft wide.

Who owns I-275 NB over CSX RR?

It is owned by the State Highway Agency.