US Bridges

Comp SR-973 over Tamiami Canal C-4

Good

Miami-Dade County, Florida · SW 87 Ave over Canal C-4 · Structure no. 870723

Built
1966
59 years old, rebuilt 1970
Condition
Good
inspected May 2024
Type
Slab
Prestressed Concrete
Length
90 ft
3 main spans
Daily traffic
27,000
2022 count
Owner
State
State Highway Agency

About this bridge

Comp SR-973 over Tamiami Canal C-4 is a prestressed concrete slab carrying Comp SR-973 over Tamiami Canal C-4 in Miami-Dade County, Florida. It was built in 1966 and reconstructed in 1970, so it is 59 years old, older 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 27,000 vehicles a day, roughly 4% of them trucks, projected to reach 46,845 by 2044. The structure is 90 ft (27.4 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesComp SR-973
CrossesTamiami Canal C-4
LocationSW 87 Ave over Canal C-4
RouteState Highway 973
StateFlorida
Coordinates25.76234, -80.33619
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 inspectionMay 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width78 ft (23.8 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,000 (2022)
Projected traffic46,845 by 2044
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Comp SR-973 over Tamiami Canal C-4 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1970.

What condition is Comp SR-973 over Tamiami Canal C-4 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 2024.

How much traffic does Comp SR-973 over Tamiami Canal C-4 carry?

About 27,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Comp SR-973 over Tamiami Canal C-4?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 78 ft wide.

Who owns Comp SR-973 over Tamiami Canal C-4?

It is owned by the State Highway Agency.