US Bridges

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

Fair

Suwannee County, Florida · I-75 NB / Suwannee River · Structure no. 370030

Built
1962
63 years old, rebuilt 1997
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
340 ft
7 main spans
Daily traffic
20,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (SR-93) over Suwannee River is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB (SR-93) over Suwannee River in Suwannee County, Florida. It was built in 1962 and reconstructed in 1997, so it is 63 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 20,000 vehicles a day, roughly 30% of them trucks, projected to reach 34,700 by 2044. The structure is 340 ft (103.6 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 NB (SR-93)
CrossesSuwannee River
LocationI-75 NB / Suwannee River
RouteInterstate 75
CountySuwannee County
StateFlorida
Coordinates30.34631, -82.83294
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 rating64.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length340 ft (103.6 m)
Longest span100 ft (30.5 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2022)
Projected traffic34,700 by 2044
Trucks30%
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

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

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1997.

What condition is I-75 NB (SR-93) over Suwannee 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 April 2023.

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

About 20,000 vehicles per day (2022 count), of which roughly 30% are trucks.

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

The structure is 340 ft (103.6 m) long with a longest span of 100 ft (30.5 m) and a deck 59 ft wide.

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

It is owned by the State Highway Agency.