US Bridges

SR821 Heft SB14.04 over Canal C-1-N

Good

Miami-Dade County, Florida · 1.15 Miles North of US-1 · Structure no. 870195

Built
1973
52 years old, rebuilt 2016
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
205 ft
3 main spans
Daily traffic
95,550
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 Heft SB14.04 over Canal C-1-N is a prestressed concrete stringer/multi-beam or girder carrying SR821 Heft SB14.04 over Canal C-1-N in Miami-Dade County, Florida. It was built in 1973 and reconstructed in 2016, 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 95,550 vehicles a day, roughly 6% of them trucks, projected to reach 165,779 by 2044. The structure is 205 ft (62.5 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR821 Heft SB14.04
CrossesCanal C-1-N
Location1.15 Miles North of US-1
RouteState Highway 821
StateFlorida
Coordinates25.59688, -80.37427
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.7 US tons
Inventory rating45.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length205 ft (62.5 m)
Longest span81 ft (24.6 m)
Deck width83 ft (25.3 m)
Roadway width81 ft (24.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95,550 (2022)
Projected traffic165,779 by 2044
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 SB14.04 over Canal C-1-N built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2016.

What condition is SR821 Heft SB14.04 over Canal C-1-N 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 SB14.04 over Canal C-1-N carry?

About 95,550 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR821 Heft SB14.04 over Canal C-1-N?

The structure is 205 ft (62.5 m) long with a longest span of 81 ft (24.6 m) and a deck 83 ft wide.

Who owns SR821 Heft SB14.04 over Canal C-1-N?

It is owned by the State Toll Authority.