US Bridges

CR 115A over Little ST Marys River

FairPosted for load

Nassau County, Florida · 2.8 MI North of CR 108 · Structure no. 740068

Built
1958
67 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
1,600
2023 count
Owner
County
County Highway Agency

About this bridge

CR 115A over Little ST Marys River is a concrete slab carrying CR 115A over Little ST Marys River in Nassau County, Florida. It was built in 1958, so it is 67 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 1,600 vehicles a day, roughly 5% of them trucks, projected to reach 2,776 by 2042. The structure is 160 ft (48.8 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCR 115A
CrossesLittle ST Marys River
Location2.8 MI North of CR 108
RouteCounty Highway 115A
CountyNassau County
StateFlorida
Coordinates30.73236, -81.89246
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 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
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 115A over Little ST Marys River built?

It was built in 1958, making it 67 years old in 2025.

What condition is CR 115A over Little ST Marys River 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 December 2023.

How much traffic does CR 115A over Little ST Marys River carry?

About 1,600 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is CR 115A over Little ST Marys River?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns CR 115A over Little ST Marys River?

It is owned by the County Highway Agency.