US Bridges

SW 112th Avenue over Miller Road Canal

Fair

Miami-Dade County, Florida · 0.3 Mile N of SW 56th St. · Structure no. 874247

Built
1957
68 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
3,500
2023 count
Owner
County
County Highway Agency

About this bridge

SW 112th Avenue over Miller Road Canal is a prestressed concrete stringer/multi-beam or girder carrying SW 112th Avenue over Miller Road Canal in Miami-Dade County, Florida. It was built in 1957, so it is 68 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 3,500 vehicles a day, roughly 2% of them trucks, projected to reach 14,025 by 2042. The structure is 52 ft (15.9 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSW 112th Avenue
CrossesMiller Road Canal
Location0.3 Mile N of SW 56th St.
RouteCity Street 0
CountyMiami-Dade County
StateFlorida
Coordinates25.71964, -80.37515
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating82.8 US tons
Inventory rating49.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.9 m)
Longest span52 ft (15.9 m)
Deck width32 ft (9.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic14,025 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
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 SW 112th Avenue over Miller Road Canal built?

It was built in 1957, making it 68 years old in 2025.

What condition is SW 112th Avenue over Miller Road Canal 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 April 2024.

How much traffic does SW 112th Avenue over Miller Road Canal carry?

About 3,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SW 112th Avenue over Miller Road Canal?

The structure is 52 ft (15.9 m) long with a longest span of 52 ft (15.9 m) and a deck 32 ft wide.

Who owns SW 112th Avenue over Miller Road Canal?

It is owned by the County Highway Agency.