US Bridges

I-275 over Sligh Avenue

Fair

Hillsborough County, Florida · 1.0 MI North of US-92 · Structure no. 100215

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

About this bridge

I-275 over Sligh Avenue is a prestressed concrete stringer/multi-beam or girder carrying I-275 over Sligh Avenue 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 225,125 by 2044. The structure is 197 ft (59.9 m) long and 138 ft wide.

Location

Open in Google Maps
CarriesI-275
CrossesSligh Avenue
Location1.0 MI North of US-92
RouteInterstate 275
CountyHillsborough County
StateFlorida
Coordinates28.01067, -82.45392
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length197 ft (59.9 m)
Longest span64 ft (19.4 m)
Deck width138 ft (42.1 m)
Roadway width132 ft (40.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic181,500 (2024)
Projected traffic225,125 by 2044
Trucks6%
Lanes on structure6
Traffic directionTwo-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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$9,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-275 over Sligh Avenue built?

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

What condition is I-275 over Sligh 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 over Sligh Avenue carry?

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

How long is I-275 over Sligh Avenue?

The structure is 197 ft (59.9 m) long with a longest span of 64 ft (19.4 m) and a deck 138 ft wide.

Who owns I-275 over Sligh Avenue?

It is owned by the State Highway Agency.