US Bridges

I-275 NB (SR-93) over Palm Avenue

Fair

Hillsborough County, Florida · 0.2 MI S of I-4 I-275 JCT · Structure no. 100144

Built
1963
62 years old, rebuilt 2006
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
164 ft
3 main spans
Daily traffic
236,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-275 NB (SR-93) over Palm Avenue is a prestressed concrete stringer/multi-beam or girder carrying I-275 NB (SR-93) over Palm Avenue in Hillsborough County, Florida. It was built in 1963 and reconstructed in 2006, so it is 62 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 236,000 vehicles a day, roughly 7% of them trucks, projected to reach 295,000 by 2044. The structure is 164 ft (50.1 m) long and 111 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-275 NB (SR-93)
CrossesPalm Avenue
Location0.2 MI S of I-4 I-275 JCT
RouteInterstate 275
CountyHillsborough County
StateFlorida
Coordinates27.96227, -82.45306
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
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 rating60.8 US tons
Inventory rating36.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length164 ft (50.1 m)
Longest span76 ft (23.2 m)
Deck width111 ft (33.7 m)
Roadway width102 ft (31 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236,000 (2024)
Projected traffic295,000 by 2044
Trucks7%
Lanes on structure7
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 (SR-93) over Palm Avenue built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2006.

What condition is I-275 NB (SR-93) over Palm Avenue 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 July 2024.

How much traffic does I-275 NB (SR-93) over Palm Avenue carry?

About 236,000 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I-275 NB (SR-93) over Palm Avenue?

The structure is 164 ft (50.1 m) long with a longest span of 76 ft (23.2 m) and a deck 111 ft wide.

Who owns I-275 NB (SR-93) over Palm Avenue?

It is owned by the State Highway Agency.