US Bridges

I-75 NB (sr 93) over Imperial River

Good

Lee County, Florida · 0.1 Mi. N/O SR 865 · Structure no. 120146

Built
1980
45 years old, rebuilt 2010
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
300 ft
6 main spans
Daily traffic
54,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (sr 93) over Imperial River is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB (sr 93) over Imperial River in Lee County, Florida. It was built in 1980 and reconstructed in 2010, 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 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 54,000 vehicles a day, roughly 11% of them trucks, projected to reach 67,500 by 2042. The structure is 300 ft (91.4 m) long and 79 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-75 NB (sr 93)
CrossesImperial River
Location0.1 Mi. N/O SR 865
RouteInterstate 75
CountyLee County
StateFlorida
Coordinates26.33571, -81.75088
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.2 US tons
Inventory rating46.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length300 ft (91.4 m)
Longest span50 ft (15.2 m)
Deck width79 ft (24.1 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,000 (2023)
Projected traffic67,500 by 2042
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 NB (sr 93) over Imperial River built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2010.

What condition is I-75 NB (sr 93) over Imperial River 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-75 NB (sr 93) over Imperial River carry?

About 54,000 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I-75 NB (sr 93) over Imperial River?

The structure is 300 ft (91.4 m) long with a longest span of 50 ft (15.2 m) and a deck 79 ft wide.

Who owns I-75 NB (sr 93) over Imperial River?

It is owned by the State Highway Agency.