US Bridges

I-275 (SR-93) over Hillsborough River

Fair

Hillsborough County, Florida · 1.7 MI North of US-92 · Structure no. 100218

Built
1967
58 years old, rebuilt 2014
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
300 ft
5 main spans
Daily traffic
181,500
2024 count
Owner
State
State Highway Agency

About this bridge

I-275 (SR-93) over Hillsborough River is a prestressed concrete stringer/multi-beam or girder carrying I-275 (SR-93) over Hillsborough River in Hillsborough County, Florida. It was built in 1967 and reconstructed in 2014, so it is 58 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 181,500 vehicles a day, roughly 6% of them trucks, projected to reach 314,903 by 2046. The structure is 300 ft (91.5 m) long and 163 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-275 (SR-93)
CrossesHillsborough River
Location1.7 MI North of US-92
RouteInterstate 275
CountyHillsborough County
StateFlorida
Coordinates28.02021, -82.45537
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length300 ft (91.5 m)
Longest span60 ft (18.4 m)
Deck width163 ft (49.7 m)
Roadway width158 ft (48.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic181,500 (2024)
Projected traffic314,903 by 2046
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-275 (SR-93) over Hillsborough River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2014.

What condition is I-275 (SR-93) over Hillsborough River 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 (SR-93) over Hillsborough River carry?

About 181,500 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is I-275 (SR-93) over Hillsborough River?

The structure is 300 ft (91.5 m) long with a longest span of 60 ft (18.4 m) and a deck 163 ft wide.

Who owns I-275 (SR-93) over Hillsborough River?

It is owned by the State Highway Agency.