US Bridges

SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD

Fair

Miami-Dade County, Florida · 3.6 Miles South of US-1 · Structure no. 870386

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
203 ft
3 main spans
Daily traffic
53,150
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD is a prestressed concrete stringer/multi-beam or girder carrying SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD in Miami-Dade County, Florida. It was built in 1973, 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 6 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 53,150 vehicles a day, roughly 6% of them trucks, projected to reach 92,215 by 2044. The structure is 203 ft (61.9 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR821 NB Heft 9.13
CrossesSW 112 Ave Allapattah RD
Location3.6 Miles South of US-1
RouteState Highway 821
CountyMiami-Dade County
StateFlorida
Coordinates25.5323, -80.37203
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length203 ft (61.9 m)
Longest span109 ft (33.2 m)
Deck width59 ft (18 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,150 (2022)
Projected traffic92,215 by 2044
Trucks6%
Lanes on structure3
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 9.13 over SW 112 Ave Allapattah RD built?

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

What condition is SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD 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 SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD carry?

About 53,150 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD?

The structure is 203 ft (61.9 m) long with a longest span of 109 ft (33.2 m) and a deck 59 ft wide.

Who owns SR821 NB Heft 9.13 over SW 112 Ave Allapattah RD?

It is owned by the State Toll Authority.