US Bridges

I-275 NB over 28th Street South

Fair

Pinellas County, Florida · 0.7MI South of I-175 · Structure no. 150132

Built
1980
45 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
226 ft
3 main spans
Daily traffic
54,750
2023 count
Owner
State
State Highway Agency

About this bridge

I-275 NB over 28th Street South is a prestressed concrete stringer/multi-beam or girder carrying I-275 NB over 28th Street South in Pinellas County, Florida. It was built in 1980, so it is 45 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 54,750 vehicles a day, roughly 7% of them trucks, projected to reach 68,438 by 2042. The structure is 226 ft (68.8 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-275 NB
Crosses28th Street South
Location0.7MI South of I-175
RouteInterstate 275
CountyPinellas County
StateFlorida
Coordinates27.76056, -82.67111
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length226 ft (68.8 m)
Longest span109 ft (33.1 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,750 (2023)
Projected traffic68,438 by 2042
Trucks7%
Lanes on structure3
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 28th Street South built?

It was built in 1980, making it 45 years old in 2025.

What condition is I-275 NB over 28th Street South 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 October 2023.

How much traffic does I-275 NB over 28th Street South carry?

About 54,750 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-275 NB over 28th Street South?

The structure is 226 ft (68.8 m) long with a longest span of 109 ft (33.1 m) and a deck 59 ft wide.

Who owns I-275 NB over 28th Street South?

It is owned by the State Highway Agency.