US Bridges

SR821 Heft NB 35.2 over US 27 & Miami Canal

Good

Miami-Dade County, Florida · 4 Miles South of I-75 · Structure no. 870425

Built
1973
52 years old, rebuilt 2001
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
421 ft
7 main spans
Daily traffic
48,500
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 Heft NB 35.2 over US 27 & Miami Canal is a prestressed concrete stringer/multi-beam or girder carrying SR821 Heft NB 35.2 over US 27 & Miami Canal in Miami-Dade County, Florida. It was built in 1973 and reconstructed in 2001, 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 48,500 vehicles a day, roughly 6% of them trucks, projected to reach 84,148 by 2042. The structure is 421 ft (128.3 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR821 Heft NB 35.2
CrossesUS 27 & Miami Canal
Location4 Miles South of I-75
RouteState Highway 821
StateFlorida
Coordinates25.90041, -80.38543
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.9 US tons
Inventory rating33.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length421 ft (128.3 m)
Longest span75 ft (23 m)
Deck width70 ft (21.4 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,500 (2024)
Projected traffic84,148 by 2042
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR821 Heft NB 35.2 over US 27 & Miami Canal built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2001.

What condition is SR821 Heft NB 35.2 over US 27 & Miami Canal 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 April 2024.

How much traffic does SR821 Heft NB 35.2 over US 27 & Miami Canal carry?

About 48,500 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR821 Heft NB 35.2 over US 27 & Miami Canal?

The structure is 421 ft (128.3 m) long with a longest span of 75 ft (23 m) and a deck 70 ft wide.

Who owns SR821 Heft NB 35.2 over US 27 & Miami Canal?

It is owned by the State Toll Authority.