US Bridges

NW 15th Street over Tamiami Canal

Fair

Miami-Dade County, Florida · 700FT. E of Perimeter RD · Structure no. 874610

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
171 ft
5 main spans
Daily traffic
9,690
2024 count
Owner
County
County Highway Agency

About this bridge

NW 15th Street over Tamiami Canal is a prestressed concrete slab carrying NW 15th Street over Tamiami Canal in Miami-Dade County, Florida. It was built in 1970, so it is 55 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 9,690 vehicles a day, roughly 5% of them trucks, projected to reach 16,493 by 2042. The structure is 171 ft (52.1 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 15th Street
CrossesTamiami Canal
Location700FT. E of Perimeter RD
RouteCity Street 0
CountyMiami-Dade County
StateFlorida
Coordinates25.78694, -80.27127
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating39.6 US tons
Inventory rating30.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span40 ft (12.3 m)
Deck width28 ft (8.6 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,690 (2024)
Projected traffic16,493 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 proposedNone recorded
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 15th Street over Tamiami Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is NW 15th Street over Tamiami Canal 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 August 2024.

How much traffic does NW 15th Street over Tamiami Canal carry?

About 9,690 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is NW 15th Street over Tamiami Canal?

The structure is 171 ft (52.1 m) long with a longest span of 40 ft (12.3 m) and a deck 28 ft wide.

Who owns NW 15th Street over Tamiami Canal?

It is owned by the County Highway Agency.