US Bridges

SR-934 EB over East Biscayne Bay

Fair

Miami-Dade County, Florida · NE 79th ST & Biscayne Bay · Structure no. 870551

Built
1973
52 years old
Condition
Fair
inspected February 2025
Type
Movable - Bascule
Steel
Length
1,029 ft
1 main span
Daily traffic
20,500
2023 count
Owner
State
State Highway Agency

About this bridge

SR-934 EB over East Biscayne Bay is a steel movable - bascule carrying SR-934 EB over East Biscayne Bay in Miami-Dade County, Florida. It was built in 1973, 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 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 20,500 vehicles a day, roughly 5% of them trucks, projected to reach 35,568 by 2042. The structure is 1,029 ft (313.5 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR-934 EB
CrossesEast Biscayne Bay
LocationNE 79th ST & Biscayne Bay
RouteState Highway 934
CountyMiami-Dade County
StateFlorida
Coordinates25.8496, -80.14465
Functional classUrban Other Principal 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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27.4 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+16 approach)
Design loadHS 20
Structure length1,029 ft (313.5 m)
Longest span90 ft (27.4 m)
Deck width48 ft (14.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic20,500 (2023)
Projected traffic35,568 by 2042
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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-934 EB over East Biscayne Bay built?

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

What condition is SR-934 EB over East Biscayne Bay 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 February 2025.

How much traffic does SR-934 EB over East Biscayne Bay carry?

About 20,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR-934 EB over East Biscayne Bay?

The structure is 1,029 ft (313.5 m) long with a longest span of 90 ft (27.4 m) and a deck 48 ft wide.

Who owns SR-934 EB over East Biscayne Bay?

It is owned by the State Highway Agency.