US Bridges

77th Street over Tatum Waterway

Fair

Miami-Dade County, Florida · 0.4 Mile W of SR-A1A · Structure no. 876719

Built
1955
70 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
103 ft
5 main spans
Daily traffic
4,916
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

77th Street over Tatum Waterway is a concrete slab carrying 77th Street over Tatum Waterway in Miami-Dade County, Florida. It was built in 1955, so it is 70 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 4,916 vehicles a day, roughly 5% of them trucks, projected to reach 7,964 by 2042. The structure is 103 ft (31.3 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries77th Street
CrossesTatum Waterway
Location0.4 Mile W of SR-A1A
RouteCity Street 0
StateFlorida
Coordinates25.86183, -80.12806
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length103 ft (31.3 m)
Longest span21 ft (6.3 m)
Deck width38 ft (11.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,916 (2024)
Projected traffic7,964 by 2042
Trucks5%
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 77th Street over Tatum Waterway built?

It was built in 1955, making it 70 years old in 2025.

What condition is 77th Street over Tatum Waterway 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 77th Street over Tatum Waterway carry?

About 4,916 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 77th Street over Tatum Waterway?

The structure is 103 ft (31.3 m) long with a longest span of 21 ft (6.3 m) and a deck 38 ft wide.

Who owns 77th Street over Tatum Waterway?

It is owned by the City or Municipal Highway Agency.