US Bridges

SR 90 Tamiami Trl. over Spillway 12-A

Good

Miami-Dade County, Florida · 4.48M E Collier&monroe · Structure no. 870030

Built
1962
63 years old
Condition
Good
inspected April 2023
Type
Slab
Prestressed Concrete
Length
170 ft
6 main spans
Daily traffic
5,900
2022 count
Owner
State
State Highway Agency

About this bridge

SR 90 Tamiami Trl. over Spillway 12-A is a prestressed concrete slab carrying SR 90 Tamiami Trl. over Spillway 12-A in Miami-Dade County, Florida. It was built in 1962, so it is 63 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 5,900 vehicles a day, roughly 12% of them trucks, projected to reach 10,236 by 2044. The structure is 170 ft (51.8 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesSR 90 Tamiami Trl.
CrossesSpillway 12-A
Location4.48M E Collier&monroe
RouteU.S. Route 0SR90
CountyMiami-Dade County
StateFlorida
Coordinates25.76179, -80.82113
Functional classRural Principal Arterial - Other

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 inspectionApril 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.5 US tons
Inventory rating51.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length170 ft (51.8 m)
Longest span28 ft (8.5 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2022)
Projected traffic10,236 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 90 Tamiami Trl. over Spillway 12-A built?

It was built in 1962, making it 63 years old in 2025.

What condition is SR 90 Tamiami Trl. over Spillway 12-A 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 April 2023.

How much traffic does SR 90 Tamiami Trl. over Spillway 12-A carry?

About 5,900 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is SR 90 Tamiami Trl. over Spillway 12-A?

The structure is 170 ft (51.8 m) long with a longest span of 28 ft (8.5 m) and a deck 34 ft wide.

Who owns SR 90 Tamiami Trl. over Spillway 12-A?

It is owned by the State Highway Agency.