US Bridges

I-75 SB over Symmes Road

Fair

Hillsborough County, Florida · 3 Miles North of CR-672 · Structure no. 100375

Built
1983
42 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
68,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Symmes Road is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over Symmes Road in Hillsborough County, Florida. It was built in 1983, so it is 42 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 68,500 vehicles a day, roughly 9% of them trucks, projected to reach 118,848 by 2042. The structure is 165 ft (50.4 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-75 SB
CrossesSymmes Road
Location3 Miles North of CR-672
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates27.83517, -82.34975
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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating52 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length165 ft (50.4 m)
Longest span89 ft (27.2 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68,500 (2023)
Projected traffic118,848 by 2042
Trucks9%
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-75 SB over Symmes Road built?

It was built in 1983, making it 42 years old in 2025.

What condition is I-75 SB over Symmes Road 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 Symmes Road carry?

About 68,500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-75 SB over Symmes Road?

The structure is 165 ft (50.4 m) long with a longest span of 89 ft (27.2 m) and a deck 59 ft wide.

Who owns I-75 SB over Symmes Road?

It is owned by the State Highway Agency.