US Bridges

Carlton RD (CR613) over C-24 Canal

FairPosted for load

St. Lucie County, Florida · 2.1MI S of SR-70 · Structure no. 940019

Built
1961
64 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
160 ft
5 main spans
Daily traffic
4,800
2023 count
Owner
County
County Highway Agency

About this bridge

Carlton RD (CR613) over C-24 Canal is a concrete slab carrying Carlton RD (CR613) over C-24 Canal in St. Lucie County, Florida. It was built in 1961, so it is 64 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. Its operating status is: posted for load restriction.

It carries about 4,800 vehicles a day, roughly 21% of them trucks, projected to reach 8,328 by 2045. The structure is 160 ft (48.8 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCarlton RD (CR613)
CrossesC-24 Canal
Location2.1MI S of SR-70
RouteCounty Highway 613
CountySt. Lucie County
StateFlorida
Coordinates27.33829, -80.54611
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length160 ft (48.8 m)
Longest span32 ft (9.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2023)
Projected traffic8,328 by 2045
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Carlton RD (CR613) over C-24 Canal built?

It was built in 1961, making it 64 years old in 2025.

What condition is Carlton RD (CR613) over C-24 Canal 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 January 2025.

How much traffic does Carlton RD (CR613) over C-24 Canal carry?

About 4,800 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is Carlton RD (CR613) over C-24 Canal?

The structure is 160 ft (48.8 m) long with a longest span of 32 ft (9.8 m) and a deck 26 ft wide.

Who owns Carlton RD (CR613) over C-24 Canal?

It is owned by the County Highway Agency.