US Bridges

SR-9 (nw 27 Ave)nb over Miami River

Fair

Miami-Dade County, Florida · NW 27 Ave & Miami River · Structure no. 870731

Built
1997
28 years old
Condition
Fair
inspected September 2024
Type
Movable - Bascule
Steel
Length
365 ft
1 main span
Daily traffic
17,750
2024 count
Owner
State
State Highway Agency

About this bridge

SR-9 (nw 27 Ave)nb over Miami River is a steel movable - bascule carrying SR-9 (nw 27 Ave)nb over Miami River in Miami-Dade County, Florida. It was built in 1997, so it is 28 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 17,750 vehicles a day, roughly 7% of them trucks, projected to reach 30,796 by 2042. The structure is 365 ft (111.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR-9 (nw 27 Ave)nb
CrossesMiami River
LocationNW 27 Ave & Miami River
RouteState Highway 9
CountyMiami-Dade County
StateFlorida
Coordinates25.7925, -80.23944
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.6 US tons
Inventory rating33.1 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length365 ft (111.4 m)
Longest span165 ft (50.2 m)
Deck width55 ft (16.8 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic17,750 (2024)
Projected traffic30,796 by 2042
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$650,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-9 (nw 27 Ave)nb over Miami River built?

It was built in 1997, making it 28 years old in 2025.

What condition is SR-9 (nw 27 Ave)nb over Miami River 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 September 2024.

How much traffic does SR-9 (nw 27 Ave)nb over Miami River carry?

About 17,750 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR-9 (nw 27 Ave)nb over Miami River?

The structure is 365 ft (111.4 m) long with a longest span of 165 ft (50.2 m) and a deck 55 ft wide.

Who owns SR-9 (nw 27 Ave)nb over Miami River?

It is owned by the State Highway Agency.