US Bridges

SR-A1A SR-105FERRY over St. Johns River

Fair

Duval County, Florida · Ferry Ramp at Mayport · Structure no. 720933

Built
1973
52 years old, rebuilt 2018
Condition
Fair
inspected April 2024
Type
Girder and Floorbeam System
Steel
Length
68 ft
1 main span
Daily traffic
6,400
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

SR-A1A SR-105FERRY over St. Johns River is a steel girder and floorbeam system carrying SR-A1A SR-105FERRY over St. Johns River in Duval County, Florida. It was built in 1973 and reconstructed in 2018, so it is 52 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 6,400 vehicles a day, roughly 15% of them trucks, projected to reach 11,104 by 2046. The structure is 68 ft (20.8 m) long and 14 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesSR-A1A SR-105FERRY
CrossesSt. Johns River
LocationFerry Ramp at Mayport
RouteState Highway 0A1A
CountyDuval County
StateFlorida
Coordinates30.39561, -81.4298
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating41 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckOpen grating
Main spans1
Design loadHL 93
Structure length68 ft (20.8 m)
Longest span68 ft (20.8 m)
Deck width14 ft (4.3 m)
Roadway width10 ft (3 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic6,400 (2024)
Projected traffic11,104 by 2046
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollToll bridge
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-A1A SR-105FERRY over St. Johns River built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2018.

What condition is SR-A1A SR-105FERRY over St. Johns 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 April 2024.

How much traffic does SR-A1A SR-105FERRY over St. Johns River carry?

About 6,400 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is SR-A1A SR-105FERRY over St. Johns River?

The structure is 68 ft (20.8 m) long with a longest span of 68 ft (20.8 m) and a deck 14 ft wide.

Who owns SR-A1A SR-105FERRY over St. Johns River?

It is owned by the City or Municipal Highway Agency.