US Bridges

SR821 Heft NB 12.4 over Caribbean Blvd

Good

Miami-Dade County, Florida · 0.4 Miles South of US-1 · Structure no. 870397

Built
1972
53 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
237 ft
4 main spans
Daily traffic
86,000
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 Heft NB 12.4 over Caribbean Blvd is a prestressed concrete stringer/multi-beam or girder carrying SR821 Heft NB 12.4 over Caribbean Blvd in Miami-Dade County, Florida. It was built in 1972, so it is 53 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 86,000 vehicles a day, roughly 6% of them trucks, projected to reach 149,210 by 2042. The structure is 237 ft (72.2 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR821 Heft NB 12.4
CrossesCaribbean Blvd
Location0.4 Miles South of US-1
RouteState Highway 821
CountyMiami-Dade County
StateFlorida
Coordinates25.57688, -80.36448
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.8 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length237 ft (72.2 m)
Longest span70 ft (21.3 m)
Deck width66 ft (20.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,000 (2024)
Projected traffic149,210 by 2042
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR821 Heft NB 12.4 over Caribbean Blvd built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR821 Heft NB 12.4 over Caribbean Blvd 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 March 2024.

How much traffic does SR821 Heft NB 12.4 over Caribbean Blvd carry?

About 86,000 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR821 Heft NB 12.4 over Caribbean Blvd?

The structure is 237 ft (72.2 m) long with a longest span of 70 ft (21.3 m) and a deck 66 ft wide.

Who owns SR821 Heft NB 12.4 over Caribbean Blvd?

It is owned by the State Toll Authority.