US Bridges

I-75 (SR-93) NB over Withlacoochee River

Fair

Hernando County, Florida · 4.2MI N/O SR-50 · Structure no. 080026

Built
1965
60 years old, rebuilt 2018
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
350 ft
7 main spans
Daily traffic
30,250
2025 count
Owner
State
State Highway Agency

About this bridge

I-75 (SR-93) NB over Withlacoochee River is a prestressed concrete stringer/multi-beam or girder carrying I-75 (SR-93) NB over Withlacoochee River in Hernando County, Florida. It was built in 1965 and reconstructed in 2018, so it is 60 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 30,250 vehicles a day, roughly 33% of them trucks, projected to reach 52,484 by 2047. The structure is 350 ft (106.7 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 (SR-93) NB
CrossesWithlacoochee River
Location4.2MI N/O SR-50
RouteInterstate 75
CountyHernando County
StateFlorida
Coordinates28.57985, -82.21729
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal 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 spans7
Design loadHL 93
Structure length350 ft (106.7 m)
Longest span50 ft (15.3 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,250 (2025)
Projected traffic52,484 by 2047
Trucks33%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 (SR-93) NB over Withlacoochee River built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2018.

What condition is I-75 (SR-93) NB over Withlacoochee River 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 January 2025.

How much traffic does I-75 (SR-93) NB over Withlacoochee River carry?

About 30,250 vehicles per day (2025 count), of which roughly 33% are trucks.

How long is I-75 (SR-93) NB over Withlacoochee River?

The structure is 350 ft (106.7 m) long with a longest span of 50 ft (15.3 m) and a deck 59 ft wide.

Who owns I-75 (SR-93) NB over Withlacoochee River?

It is owned by the State Highway Agency.