US Bridges

SW 104 ST 19.4 over SR 821 Heft 19.4

Fair

Miami-Dade County, Florida · 1 Mile South of SR 94 · Structure no. 870578

Built
1973
52 years old, rebuilt 1993
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
214 ft
2 main spans
Daily traffic
126,900
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SW 104 ST 19.4 over SR 821 Heft 19.4 is a prestressed concrete stringer/multi-beam or girder carrying SW 104 ST 19.4 over SR 821 Heft 19.4 in Miami-Dade County, Florida. It was built in 1973 and reconstructed in 1993, 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 126,900 vehicles a day, roughly 6% of them trucks, projected to reach 220,172 by 2042. The structure is 214 ft (65.2 m) long and 112 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSW 104 ST 19.4
CrossesSR 821 Heft 19.4
Location1 Mile South of SR 94
RouteCounty Highway 990
CountyMiami-Dade County
StateFlorida
Coordinates25.67173, -80.38853
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length214 ft (65.2 m)
Longest span107 ft (32.6 m)
Deck width112 ft (34.1 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126,900 (2024)
Projected traffic220,172 by 2042
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 SW 104 ST 19.4 over SR 821 Heft 19.4 built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1993.

What condition is SW 104 ST 19.4 over SR 821 Heft 19.4 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does SW 104 ST 19.4 over SR 821 Heft 19.4 carry?

About 126,900 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SW 104 ST 19.4 over SR 821 Heft 19.4?

The structure is 214 ft (65.2 m) long with a longest span of 107 ft (32.6 m) and a deck 112 ft wide.

Who owns SW 104 ST 19.4 over SR 821 Heft 19.4?

It is owned by the State Toll Authority.