US Bridges

SR-13 over Kentucky Branch

Fair

St. Johns County, Florida · 2 Mi. S. of Switzerland · Structure no. 780091

Built
1979
46 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
138 ft
5 main spans
Daily traffic
4,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR-13 over Kentucky Branch is a concrete continuous slab carrying SR-13 over Kentucky Branch in St. Johns 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 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 4,500 vehicles a day, roughly 9% of them trucks, projected to reach 7,808 by 2044. The structure is 138 ft (42.1 m) long and 43 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSR-13
CrossesKentucky Branch
Location2 Mi. S. of Switzerland
RouteState Highway 13
CountySt. Johns County
StateFlorida
Coordinates30.05577, -81.66781
Functional classRural Minor Arterial

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.
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 inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.1 US tons
Inventory rating39.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length138 ft (42.1 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2022)
Projected traffic7,808 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

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 SR-13 over Kentucky Branch built?

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

What condition is SR-13 over Kentucky Branch 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 March 2023.

How much traffic does SR-13 over Kentucky Branch carry?

About 4,500 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is SR-13 over Kentucky Branch?

The structure is 138 ft (42.1 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns SR-13 over Kentucky Branch?

It is owned by the State Highway Agency.