US Bridges

I-75 NB (SR-93) over Corkscrew Road (CR-850)

Good

Lee County, Florida · 8.3 MI N of Collier CO · Structure no. 120141

Built
1981
44 years old, rebuilt 2010
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
222 ft
2 main spans
Daily traffic
54,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (SR-93) over Corkscrew Road (CR-850) is a prestressed concrete continuous stringer/multi-beam or girder carrying I-75 NB (SR-93) over Corkscrew Road (CR-850) in Lee County, Florida. It was built in 1981 and reconstructed in 2010, so it is 44 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 93,690 by 2042. The structure is 222 ft (67.7 m) long and 59 ft wide.

Location

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CarriesI-75 NB (SR-93)
CrossesCorkscrew Road (CR-850)
Location8.3 MI N of Collier CO
RouteInterstate 75
CountyLee County
StateFlorida
Coordinates26.43241, -81.77774
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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length222 ft (67.7 m)
Longest span111 ft (33.8 m)
Deck width59 ft (18 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,000 (2023)
Projected traffic93,690 by 2042
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 NB (SR-93) over Corkscrew Road (CR-850) built?

It was built in 1981, making it 44 years old in 2025. It was reconstructed in 2010.

What condition is I-75 NB (SR-93) over Corkscrew Road (CR-850) 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 April 2023.

How much traffic does I-75 NB (SR-93) over Corkscrew Road (CR-850) carry?

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

How long is I-75 NB (SR-93) over Corkscrew Road (CR-850)?

The structure is 222 ft (67.7 m) long with a longest span of 111 ft (33.8 m) and a deck 59 ft wide.

Who owns I-75 NB (SR-93) over Corkscrew Road (CR-850)?

It is owned by the State Highway Agency.