US Bridges

I-75 NB (SR-93) over Little Marsh

Good

Collier County, Florida · 11.3 Miles East of SR-29 · Structure no. 030255

Built
1991
34 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
181 ft
6 main spans
Daily traffic
13,750
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (SR-93) over Little Marsh is a prestressed concrete slab carrying I-75 NB (SR-93) over Little Marsh in Collier County, Florida. It was built in 1991, so it is 34 years old, younger 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 13,750 vehicles a day, roughly 18% of them trucks, projected to reach 17,188 by 2044. The structure is 181 ft (55.2 m) long and 43 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)
CrossesLittle Marsh
Location11.3 Miles East of SR-29
RouteInterstate 75
CountyCollier County
StateFlorida
Coordinates26.16759, -81.16602
Functional classRural 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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
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 rating67.4 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length181 ft (55.2 m)
Longest span30 ft (9.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,750 (2024)
Projected traffic17,188 by 2044
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn an Interstate toll segment under Secretarial agreement
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 Little Marsh built?

It was built in 1991, making it 34 years old in 2025.

What condition is I-75 NB (SR-93) over Little Marsh 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 March 2024.

How much traffic does I-75 NB (SR-93) over Little Marsh carry?

About 13,750 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is I-75 NB (SR-93) over Little Marsh?

The structure is 181 ft (55.2 m) long with a longest span of 30 ft (9.2 m) and a deck 43 ft wide.

Who owns I-75 NB (SR-93) over Little Marsh?

It is owned by the State Highway Agency.