US Bridges

I-275 NB over Willow Ave.

Good

Hillsborough County, Florida · 2.0 MI E of Dale Mabry · Structure no. 100703

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
114,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-275 NB over Willow Ave. is a prestressed concrete box beam or girders - single or spread carrying I-275 NB over Willow Ave. in Hillsborough County, Florida. It was built in 2009, so it is 16 years old, younger 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 114,000 vehicles a day, roughly 7% of them trucks, projected to reach 197,790 by 2044. The structure is 108 ft (32.9 m) long and 94 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-275 NB
CrossesWillow Ave.
Location2.0 MI E of Dale Mabry
RouteInterstate 275
CountyHillsborough County
StateFlorida
Coordinates27.95551, -82.47254
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
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 rating110.1 US tons
Inventory rating64.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length108 ft (32.9 m)
Longest span108 ft (32.9 m)
Deck width94 ft (28.5 m)
Roadway width90 ft (27.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic114,000 (2022)
Projected traffic197,790 by 2044
Trucks7%
Lanes on structure5
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 over Willow Ave. built?

It was built in 2009, making it 16 years old in 2025.

What condition is I-275 NB over Willow Ave. 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 May 2023.

How much traffic does I-275 NB over Willow Ave. carry?

About 114,000 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is I-275 NB over Willow Ave.?

The structure is 108 ft (32.9 m) long with a longest span of 108 ft (32.9 m) and a deck 94 ft wide.

Who owns I-275 NB over Willow Ave.?

It is owned by the State Highway Agency.