US Bridges

Mid Prong ST Marys over Mid Prong ST Marys Rv

Fair

Baker County, Florida · National Forest · Structure no. 080504000012190

Built
1979
46 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
150 ft
5 main spans
Daily traffic
20
Owner
Federal
U.S. Forest Service

About this bridge

Mid Prong ST Marys over Mid Prong ST Marys Rv is a concrete tee beam carrying Mid Prong ST Marys over Mid Prong ST Marys Rv in Baker County, Florida. It was built in 1979, so it is 46 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 150 ft (45.7 m) long and 14 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesMid Prong ST Marys
CrossesMid Prong ST Marys Rv
LocationNational Forest
RouteFederal Lands Road 235
CountyBaker County
StateFlorida
Coordinates30.37325, -82.39831
Functional classRural Local

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 inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span30 ft (9.1 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (—)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mid Prong ST Marys over Mid Prong ST Marys Rv built?

It was built in 1979, making it 46 years old in 2025.

What condition is Mid Prong ST Marys over Mid Prong ST Marys Rv 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 2024.

How much traffic does Mid Prong ST Marys over Mid Prong ST Marys Rv carry?

About 20 vehicles per day (latest count).

How long is Mid Prong ST Marys over Mid Prong ST Marys Rv?

The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 14 ft wide.

Who owns Mid Prong ST Marys over Mid Prong ST Marys Rv?

It is owned by the U.S. Forest Service.