US Bridges

SR-A1A (n. Causwy) over North Causway E Relief

Fair

St. Lucie County, Florida · 1.5 Mi. East of US-1 · Structure no. 940046

Built
1967
58 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
385 ft
8 main spans
Daily traffic
8,600
2022 count
Owner
State
State Highway Agency

About this bridge

SR-A1A (n. Causwy) over North Causway E Relief is a prestressed concrete stringer/multi-beam or girder carrying SR-A1A (n. Causwy) over North Causway E Relief in St. Lucie County, Florida. It was built in 1967, so it is 58 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 8,600 vehicles a day, roughly 8% of them trucks, projected to reach 14,921 by 2044. The structure is 385 ft (117.3 m) long and 42 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesSR-A1A (n. Causwy)
CrossesNorth Causway E Relief
Location1.5 Mi. East of US-1
RouteState Highway 0A1A
CountySt. Lucie County
StateFlorida
Coordinates27.47936, -80.31286
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.8 US tons
Inventory rating22.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length385 ft (117.3 m)
Longest span48 ft (14.7 m)
Deck width42 ft (12.7 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (2022)
Projected traffic14,921 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
Detour if closed26.1 mi (42 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-A1A (n. Causwy) over North Causway E Relief built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR-A1A (n. Causwy) over North Causway E Relief 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 2025.

How much traffic does SR-A1A (n. Causwy) over North Causway E Relief carry?

About 8,600 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SR-A1A (n. Causwy) over North Causway E Relief?

The structure is 385 ft (117.3 m) long with a longest span of 48 ft (14.7 m) and a deck 42 ft wide.

Who owns SR-A1A (n. Causwy) over North Causway E Relief?

It is owned by the State Highway Agency.