US Bridges

West 47th Street over Biscayne Waterway

Fair

Miami-Dade County, Florida · 300 Ft E/O Meridian Ave · Structure no. 870790

Built
1996
29 years old
Condition
Fair
inspected October 2024
Type
Slab
Prestressed Concrete
Length
166 ft
5 main spans
Daily traffic
4,838
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

West 47th Street over Biscayne Waterway is a prestressed concrete slab carrying West 47th Street over Biscayne Waterway in Miami-Dade County, Florida. It was built in 1996, so it is 29 years old, younger 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 4,838 vehicles a day, roughly 2% of them trucks, projected to reach 5,066 by 2042. The structure is 166 ft (50.6 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWest 47th Street
CrossesBiscayne Waterway
Location300 Ft E/O Meridian Ave
RouteCity Street 0
StateFlorida
Coordinates25.82187, -80.13037
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating95 US tons
Inventory rating56.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length166 ft (50.6 m)
Longest span33 ft (10.2 m)
Deck width46 ft (14 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,838 (2024)
Projected traffic5,066 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
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 West 47th Street over Biscayne Waterway built?

It was built in 1996, making it 29 years old in 2025.

What condition is West 47th Street over Biscayne 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 October 2024.

How much traffic does West 47th Street over Biscayne Waterway carry?

About 4,838 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is West 47th Street over Biscayne Waterway?

The structure is 166 ft (50.6 m) long with a longest span of 33 ft (10.2 m) and a deck 46 ft wide.

Who owns West 47th Street over Biscayne Waterway?

It is owned by the City or Municipal Highway Agency.