US Bridges

CR 23C over S Prong to ST Marys Rvr

FairPosted for load

Baker County, Florida · 1.1 MI North of SR 121 · Structure no. 270032

Built
1955
70 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
125 ft
5 main spans
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

CR 23C over S Prong to ST Marys Rvr is a concrete slab carrying CR 23C over S Prong to ST Marys Rvr in Baker County, Florida. It was built in 1955, so it is 70 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 5 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 1,600 vehicles a day, roughly 10% of them trucks, projected to reach 2,776 by 2042. The structure is 125 ft (38.1 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCR 23C
CrossesS Prong to ST Marys Rvr
Location1.1 MI North of SR 121
RouteCounty Highway 23C
CountyBaker County
StateFlorida
Coordinates30.33583, -82.14417
Functional classRural Minor 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.4 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length125 ft (38.1 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic2,776 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 CR 23C over S Prong to ST Marys Rvr built?

It was built in 1955, making it 70 years old in 2025.

What condition is CR 23C over S Prong to ST Marys Rvr 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 August 2023.

How much traffic does CR 23C over S Prong to ST Marys Rvr carry?

About 1,600 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CR 23C over S Prong to ST Marys Rvr?

The structure is 125 ft (38.1 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns CR 23C over S Prong to ST Marys Rvr?

It is owned by the County Highway Agency.