US Bridges

SR856 WB (870607) over Intracoastal Waterway

Good

Miami-Dade County, Florida · 0.1M W of A1A · Structure no. 870606

Built
1983
42 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,153 ft
3 main spans
Daily traffic
20,500
2024 count
Owner
State
State Highway Agency

About this bridge

SR856 WB (870607) over Intracoastal Waterway is a steel continuous stringer/multi-beam or girder carrying SR856 WB (870607) over Intracoastal Waterway in Miami-Dade County, Florida. It was built in 1983, so it is 42 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 20,500 vehicles a day, roughly 3% of them trucks, projected to reach 35,568 by 2044. The structure is 2,153 ft (656.2 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSR856 WB (870607)
CrossesIntracoastal Waterway
Location0.1M W of A1A
RouteState Highway 856
CountyMiami-Dade County
StateFlorida
Coordinates25.95427, -80.12619
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+17 approach)
Design loadHL 93
Structure length2,153 ft (656.2 m)
Longest span170 ft (51.8 m)
Deck width55 ft (16.8 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic20,500 (2024)
Projected traffic35,568 by 2044
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$150,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR856 WB (870607) over Intracoastal Waterway built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR856 WB (870607) over Intracoastal Waterway 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 February 2024.

How much traffic does SR856 WB (870607) over Intracoastal Waterway carry?

About 20,500 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SR856 WB (870607) over Intracoastal Waterway?

The structure is 2,153 ft (656.2 m) long with a longest span of 170 ft (51.8 m) and a deck 55 ft wide.

Who owns SR856 WB (870607) over Intracoastal Waterway?

It is owned by the State Highway Agency.