US Bridges

CR 122 over Mid-Prg ST Marys River

Fair

Baker County, Florida · 1.0 MI East of CR 125 · Structure no. 270035

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
330 ft
11 main spans
Daily traffic
450
2023 count
Owner
County
County Highway Agency

About this bridge

CR 122 over Mid-Prg ST Marys River is a concrete slab carrying CR 122 over Mid-Prg ST Marys River in Baker County, Florida. It was built in 1969, so it is 56 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.

It carries about 450 vehicles a day, roughly 22% of them trucks, projected to reach 781 by 2042. The structure is 330 ft (100.6 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCR 122
CrossesMid-Prg ST Marys River
Location1.0 MI East of CR 125
RouteCounty Highway 122
CountyBaker County
StateFlorida
Coordinates30.4375, -82.27028
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating35.3 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadH 20
Structure length330 ft (100.6 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic781 by 2042
Trucks22%
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 CR 122 over Mid-Prg ST Marys River built?

It was built in 1969, making it 56 years old in 2025.

What condition is CR 122 over Mid-Prg 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 September 2023.

How much traffic does CR 122 over Mid-Prg ST Marys River carry?

About 450 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is CR 122 over Mid-Prg ST Marys River?

The structure is 330 ft (100.6 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns CR 122 over Mid-Prg ST Marys River?

It is owned by the County Highway Agency.