US Bridges

I-95 NB (SR-9) over Turnbull Swamp

Fair

St. Johns County, Florida · 2.7 Mi. N. of SR-16 · Structure no. 780060

Built
1967
58 years old, rebuilt 1991
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
120 ft
4 main spans
Daily traffic
48,250
2022 count
Owner
State
State Highway Agency

About this bridge

I-95 NB (SR-9) over Turnbull Swamp is a concrete continuous slab carrying I-95 NB (SR-9) over Turnbull Swamp in St. Johns County, Florida. It was built in 1967 and reconstructed in 1991, so it is 58 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 48,250 vehicles a day, roughly 7% of them trucks, projected to reach 83,714 by 2042. The structure is 120 ft (36.6 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-95 NB (SR-9)
CrossesTurnbull Swamp
Location2.7 Mi. N. of SR-16
RouteInterstate 95
CountySt. Johns County
StateFlorida
Coordinates29.94944, -81.43806
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 inspectionOctober 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,250 (2022)
Projected traffic83,714 by 2042
Trucks7%
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-95 NB (SR-9) over Turnbull Swamp built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1991.

What condition is I-95 NB (SR-9) over Turnbull Swamp 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 October 2023.

How much traffic does I-95 NB (SR-9) over Turnbull Swamp carry?

About 48,250 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is I-95 NB (SR-9) over Turnbull Swamp?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 59 ft wide.

Who owns I-95 NB (SR-9) over Turnbull Swamp?

It is owned by the State Highway Agency.