US Bridges

SR-A1A over Matanzas River

Good

St. Johns County, Florida · 1.8 MI N of Marineland · Structure no. 780120

Built
2011
14 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
690 ft
5 main spans
Daily traffic
7,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR-A1A over Matanzas River is a prestressed concrete stringer/multi-beam or girder carrying SR-A1A over Matanzas River in St. Johns County, Florida. It was built in 2011, so it is 14 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,145 by 2044. The structure is 690 ft (210.3 m) long and 63 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSR-A1A
CrossesMatanzas River
Location1.8 MI N of Marineland
RouteState Highway 0A1A
CountySt. Johns County
StateFlorida
Coordinates29.69694, -81.22528
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
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 rating68.8 US tons
Inventory rating54.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length690 ft (210.3 m)
Longest span115 ft (35.1 m)
Deck width63 ft (19.3 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2022)
Projected traffic12,145 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-A1A over Matanzas River built?

It was built in 2011, making it 14 years old in 2025.

What condition is SR-A1A over Matanzas River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does SR-A1A over Matanzas River carry?

About 7,000 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is SR-A1A over Matanzas River?

The structure is 690 ft (210.3 m) long with a longest span of 115 ft (35.1 m) and a deck 63 ft wide.

Who owns SR-A1A over Matanzas River?

It is owned by the State Highway Agency.