US Bridges

SW 136th Street over Levee L-31-N

Good

Miami-Dade County, Florida · 1 Mile W/O SW 177th Ave. · Structure no. 874761

Built
1983
42 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
520
2024 count
Owner
County
County Highway Agency

About this bridge

SW 136th Street over Levee L-31-N is a prestressed concrete slab carrying SW 136th Street over Levee L-31-N 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 520 vehicles a day, roughly 10% of them trucks, projected to reach 818 by 2042. The structure is 120 ft (36.6 m) long and 36 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

CarriesSW 136th Street
CrossesLevee L-31-N
Location1 Mile W/O SW 177th Ave.
RouteCounty Highway 0
StateFlorida
Coordinates25.63778, -80.497
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.3 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span38 ft (11.7 m)
Deck width36 ft (11.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2024)
Projected traffic818 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed7.5 mi (12 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 136th Street over Levee L-31-N built?

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

What condition is SW 136th Street over Levee L-31-N 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 SW 136th Street over Levee L-31-N carry?

About 520 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SW 136th Street over Levee L-31-N?

The structure is 120 ft (36.6 m) long with a longest span of 38 ft (11.7 m) and a deck 36 ft wide.

Who owns SW 136th Street over Levee L-31-N?

It is owned by the County Highway Agency.