US Bridges

SR821 SB Heft 18.0 over Relocated Canal C-100

Good

Miami-Dade County, Florida · 5.3 Miles North of US-1 · Structure no. 870201

Built
1973
52 years old, rebuilt 2019
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
111 ft
3 main spans
Daily traffic
60,950
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 SB Heft 18.0 over Relocated Canal C-100 is a prestressed concrete stringer/multi-beam or girder carrying SR821 SB Heft 18.0 over Relocated Canal C-100 in Miami-Dade County, Florida. It was built in 1973 and reconstructed in 2019, 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 60,950 vehicles a day, roughly 6% of them trucks, projected to reach 105,748 by 2044. The structure is 111 ft (33.9 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR821 SB Heft 18.0
CrossesRelocated Canal C-100
Location5.3 Miles North of US-1
RouteState Highway 821
StateFlorida
Coordinates25.65232, -80.38708
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating61.4 US tons
Inventory rating47.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length111 ft (33.9 m)
Longest span37 ft (11.3 m)
Deck width85 ft (25.9 m)
Roadway width80 ft (24.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,950 (2022)
Projected traffic105,748 by 2044
Trucks6%
Lanes on structure5
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 SB Heft 18.0 over Relocated Canal C-100 built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2019.

What condition is SR821 SB Heft 18.0 over Relocated Canal C-100 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 SB Heft 18.0 over Relocated Canal C-100 carry?

About 60,950 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR821 SB Heft 18.0 over Relocated Canal C-100?

The structure is 111 ft (33.9 m) long with a longest span of 37 ft (11.3 m) and a deck 85 ft wide.

Who owns SR821 SB Heft 18.0 over Relocated Canal C-100?

It is owned by the State Toll Authority.