US Bridges

Atlantic Avenue over Intracoastal Waterway

Fair

Palm Beach County, Florida · Between SR-A1A & SR-5 · Structure no. 930064

Built
1952
73 years old
Condition
Fair
inspected July 2024
Type
Movable - Bascule
Steel
Length
235 ft
1 main span
Daily traffic
16,000
2024 count
Owner
State
State Highway Agency

About this bridge

Atlantic Avenue over Intracoastal Waterway is a steel movable - bascule carrying Atlantic Avenue over Intracoastal Waterway in Palm Beach County, Florida. It was built in 1952, so it is 73 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 16,000 vehicles a day, roughly 5% of them trucks, projected to reach 27,760 by 2044. The structure is 235 ft (71.7 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAtlantic Avenue
CrossesIntracoastal Waterway
LocationBetween SR-A1A & SR-5
RouteState Highway 806
CountyPalm Beach County
StateFlorida
Coordinates26.46161, -80.06424
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.1 US tons
Inventory rating25.2 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+2 approach)
Design loadH 15
Structure length235 ft (71.7 m)
Longest span103 ft (31.4 m)
Deck width53 ft (16.3 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2024)
Projected traffic27,760 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Atlantic Avenue over Intracoastal Waterway built?

It was built in 1952, making it 73 years old in 2025.

What condition is Atlantic Avenue over Intracoastal Waterway 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 July 2024.

How much traffic does Atlantic Avenue over Intracoastal Waterway carry?

About 16,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Atlantic Avenue over Intracoastal Waterway?

The structure is 235 ft (71.7 m) long with a longest span of 103 ft (31.4 m) and a deck 53 ft wide.

Who owns Atlantic Avenue over Intracoastal Waterway?

It is owned by the State Highway Agency.