US Bridges

SR821 NB Heft 5.2 over SW 288 ST Biscayne DR

Good

Miami-Dade County, Florida · 2.15 Mi. N of Campbell DR · Structure no. 870381

Built
1973
52 years old, rebuilt 1996
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
37,800
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 NB Heft 5.2 over SW 288 ST Biscayne DR is a prestressed concrete stringer/multi-beam or girder carrying SR821 NB Heft 5.2 over SW 288 ST Biscayne DR in Miami-Dade County, Florida. It was built in 1973 and reconstructed in 1996, so it is 52 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 37,800 vehicles a day, roughly 6% of them trucks, projected to reach 65,583 by 2042. The structure is 180 ft (54.9 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR821 NB Heft 5.2
CrossesSW 288 ST Biscayne DR
Location2.15 Mi. N of Campbell DR
RouteState Highway 821
StateFlorida
Coordinates25.49953, -80.41727
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 inspectionFebruary 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 rating68 US tons
Inventory rating49.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length180 ft (54.9 m)
Longest span97 ft (29.6 m)
Deck width67 ft (20.5 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,800 (2024)
Projected traffic65,583 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 NB Heft 5.2 over SW 288 ST Biscayne DR built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1996.

What condition is SR821 NB Heft 5.2 over SW 288 ST Biscayne DR 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 February 2024.

How much traffic does SR821 NB Heft 5.2 over SW 288 ST Biscayne DR carry?

About 37,800 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR821 NB Heft 5.2 over SW 288 ST Biscayne DR?

The structure is 180 ft (54.9 m) long with a longest span of 97 ft (29.6 m) and a deck 67 ft wide.

Who owns SR821 NB Heft 5.2 over SW 288 ST Biscayne DR?

It is owned by the State Toll Authority.