US Bridges

NW 12th Ave over Miami River

Good

Miami-Dade County, Florida · 150 Ft. S. of NW 11th ST · Structure no. 871005

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Movable - Bascule
Steel
Length
677 ft
1 main span
Daily traffic
20,600
2024 count
Owner
State
State Highway Agency

About this bridge

NW 12th Ave over Miami River is a steel movable - bascule carrying NW 12th Ave over Miami River in Miami-Dade County, Florida. It was built in 2009, so it is 16 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 20,600 vehicles a day, roughly 5% of them trucks, projected to reach 35,741 by 2044. The structure is 677 ft (206.3 m) long and 110 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNW 12th Ave
CrossesMiami River
Location150 Ft. S. of NW 11th ST
RouteState Highway 933
CountyMiami-Dade County
StateFlorida
Coordinates25.78247, -80.21475
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.2 US tons
Inventory rating38.3 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckAluminum
Main spans1 (+3 approach)
Design loadHS 20 + Mod
Structure length677 ft (206.3 m)
Longest span165 ft (50.3 m)
Deck width110 ft (33.5 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deck22 ft (6.6 m)

Traffic and service

Average daily traffic20,600 (2024)
Projected traffic35,741 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.9 mi (3 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 NW 12th Ave over Miami River built?

It was built in 2009, making it 16 years old in 2025.

What condition is NW 12th Ave over Miami 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 May 2023.

How much traffic does NW 12th Ave over Miami River carry?

About 20,600 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is NW 12th Ave over Miami River?

The structure is 677 ft (206.3 m) long with a longest span of 165 ft (50.3 m) and a deck 110 ft wide.

Who owns NW 12th Ave over Miami River?

It is owned by the State Highway Agency.