US Bridges

85th Street over Tatum Waterway

Good

Miami-Dade County, Florida · 0.2 Mile West of A1A · Structure no. 876735

Built
1989
36 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
225 ft
7 main spans
Daily traffic
7,674
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

85th Street over Tatum Waterway is a concrete continuous slab carrying 85th Street over Tatum Waterway in Miami-Dade County, Florida. It was built in 1989, so it is 36 years old, younger 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 7,674 vehicles a day, roughly 2% of them trucks, projected to reach 12,565 by 2042. The structure is 225 ft (68.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries85th Street
CrossesTatum Waterway
Location0.2 Mile West of A1A
RouteCity Street 0
StateFlorida
Coordinates25.86986, -80.12453
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating83.3 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span40 ft (12.3 m)
Deck width40 ft (12.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,674 (2020)
Projected traffic12,565 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 85th Street over Tatum Waterway built?

It was built in 1989, making it 36 years old in 2025.

What condition is 85th Street over Tatum 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 August 2024.

How much traffic does 85th Street over Tatum Waterway carry?

About 7,674 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is 85th Street over Tatum Waterway?

The structure is 225 ft (68.6 m) long with a longest span of 40 ft (12.3 m) and a deck 40 ft wide.

Who owns 85th Street over Tatum Waterway?

It is owned by the City or Municipal Highway Agency.