US Bridges

US27 SR20 over ST Marks River

Fair

Leon County, Florida · 1.5 MI W. of Jefferson CO · Structure no. 550030

Built
1961
64 years old, rebuilt 1992
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
415 ft
18 main spans
Daily traffic
2,700
2022 count
Owner
State
State Highway Agency

About this bridge

US27 SR20 over ST Marks River is a concrete continuous slab carrying US27 SR20 over ST Marks River in Leon County, Florida. It was built in 1961 and reconstructed in 1992, 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.

It carries about 2,700 vehicles a day, roughly 16% of them trucks, projected to reach 4,684 by 2044. The structure is 415 ft (126.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS27 SR20
CrossesST Marks River
Location1.5 MI W. of Jefferson CO
RouteU.S. Route 27
CountyLeon County
StateFlorida
Coordinates30.42081, -84.10135
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length415 ft (126.5 m)
Longest span24 ft (7.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2022)
Projected traffic4,684 by 2044
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US27 SR20 over ST Marks River built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1992.

What condition is US27 SR20 over ST Marks 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 June 2023.

How much traffic does US27 SR20 over ST Marks River carry?

About 2,700 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US27 SR20 over ST Marks River?

The structure is 415 ft (126.5 m) long with a longest span of 24 ft (7.2 m) and a deck 43 ft wide.

Who owns US27 SR20 over ST Marks River?

It is owned by the State Highway Agency.