US Bridges

SR821 NB Heft 16.4 over SW 117 Ave

Good

Miami-Dade County, Florida · 3.6 Miles North of US-1 · Structure no. 870406

Built
1973
52 years old, rebuilt 2019
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
269 ft
4 main spans
Daily traffic
110,200
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 NB Heft 16.4 over SW 117 Ave is a prestressed concrete stringer/multi-beam or girder carrying SR821 NB Heft 16.4 over SW 117 Ave 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 110,200 vehicles a day, roughly 6% of them trucks, projected to reach 191,197 by 2042. The structure is 269 ft (81.9 m) long and 97 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR821 NB Heft 16.4
CrossesSW 117 Ave
Location3.6 Miles North of US-1
RouteState Highway 821
CountyMiami-Dade County
StateFlorida
Coordinates25.63035, -80.38243
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.7 US tons
Inventory rating38.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length269 ft (81.9 m)
Longest span79 ft (24.2 m)
Deck width97 ft (29.6 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110,200 (2024)
Projected traffic191,197 by 2042
Trucks6%
Lanes on structure6
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 16.4 over SW 117 Ave built?

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

What condition is SR821 NB Heft 16.4 over SW 117 Ave 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 NB Heft 16.4 over SW 117 Ave carry?

About 110,200 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR821 NB Heft 16.4 over SW 117 Ave?

The structure is 269 ft (81.9 m) long with a longest span of 79 ft (24.2 m) and a deck 97 ft wide.

Who owns SR821 NB Heft 16.4 over SW 117 Ave?

It is owned by the State Toll Authority.