US Bridges

Miami Ave NB over Miami River

Good

Miami-Dade County, Florida · 200 Ft. S/O. SW 3rd St. · Structure no. 874664

Built
1985
40 years old
Condition
Good
inspected January 2024
Type
Movable - Bascule
Steel
Length
629 ft
1 main span
Daily traffic
4,460
2024 count
Owner
County
County Highway Agency

About this bridge

Miami Ave NB over Miami River is a steel movable - bascule carrying Miami Ave NB over Miami River in Miami-Dade County, Florida. It was built in 1985, so it is 40 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 4,460 vehicles a day, roughly 5% of them trucks, projected to reach 6,176 by 2042. The structure is 629 ft (191.7 m) long and 51 ft wide.

Location

Open in Google Maps
CarriesMiami Ave NB
CrossesMiami River
Location200 Ft. S/O. SW 3rd St.
RouteCity Street 0
CountyMiami-Dade County
StateFlorida
Coordinates25.76972, -80.19339
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
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 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 rating41.4 US tons
Inventory rating31.9 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+9 approach)
Design loadHL 93
Structure length629 ft (191.7 m)
Longest span176 ft (53.6 m)
Deck width51 ft (15.6 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deck20 ft (6 m)

Traffic and service

Average daily traffic4,460 (2024)
Projected traffic6,176 by 2042
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Miami Ave NB over Miami River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Miami Ave NB 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 January 2024.

How much traffic does Miami Ave NB over Miami River carry?

About 4,460 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Miami Ave NB over Miami River?

The structure is 629 ft (191.7 m) long with a longest span of 176 ft (53.6 m) and a deck 51 ft wide.

Who owns Miami Ave NB over Miami River?

It is owned by the County Highway Agency.