US Bridges

I-75 SB over SR-674

Fair

Hillsborough County, Florida · 5.8MI S of CR672/BIG Bend · Structure no. 100346

Built
1982
43 years old, rebuilt 2005
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
275 ft
4 main spans
Daily traffic
44,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over SR-674 is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over SR-674 in Hillsborough County, Florida. It was built in 1982 and reconstructed in 2005, so it is 43 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 44,000 vehicles a day, roughly 18% of them trucks, projected to reach 76,340 by 2044. The structure is 275 ft (83.8 m) long and 67 ft wide.

Location

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CarriesI-75 SB
CrossesSR-674
Location5.8MI S of CR672/BIG Bend
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates27.71269, -82.38493
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.6 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length275 ft (83.8 m)
Longest span92 ft (28.1 m)
Deck width67 ft (20.3 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,000 (2022)
Projected traffic76,340 by 2044
Trucks18%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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-75 SB over SR-674 built?

It was built in 1982, making it 43 years old in 2025. It was reconstructed in 2005.

What condition is I-75 SB over SR-674 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 September 2023.

How much traffic does I-75 SB over SR-674 carry?

About 44,000 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is I-75 SB over SR-674?

The structure is 275 ft (83.8 m) long with a longest span of 92 ft (28.1 m) and a deck 67 ft wide.

Who owns I-75 SB over SR-674?

It is owned by the State Highway Agency.