US Bridges

SR-9 NB over Biscayne Canal C-8

Good

Miami-Dade County, Florida · 0.66M W of SR-7 · Structure no. 870091

Built
1949
76 years old
Condition
Good
inspected February 2025
Type
Tee Beam
Concrete
Length
198 ft
6 main spans
Daily traffic
14,161
2022 count
Owner
State
State Highway Agency

About this bridge

SR-9 NB over Biscayne Canal C-8 is a concrete tee beam carrying SR-9 NB over Biscayne Canal C-8 in Miami-Dade County, Florida. It was built in 1949, so it is 76 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 14,161 vehicles a day, roughly 9% of them trucks, projected to reach 24,569 by 2044. The structure is 198 ft (60.4 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR-9 NB
CrossesBiscayne Canal C-8
Location0.66M W of SR-7
RouteState Highway 9
CountyMiami-Dade County
StateFlorida
Coordinates25.91615, -80.22251
Functional classUrban Other Principal Arterial

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 2025
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.4 US tons
Inventory rating41.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length198 ft (60.4 m)
Longest span33 ft (10.1 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,161 (2022)
Projected traffic24,569 by 2044
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-9 NB over Biscayne Canal C-8 built?

It was built in 1949, making it 76 years old in 2025.

What condition is SR-9 NB over Biscayne Canal C-8 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 2025.

How much traffic does SR-9 NB over Biscayne Canal C-8 carry?

About 14,161 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is SR-9 NB over Biscayne Canal C-8?

The structure is 198 ft (60.4 m) long with a longest span of 33 ft (10.1 m) and a deck 33 ft wide.

Who owns SR-9 NB over Biscayne Canal C-8?

It is owned by the State Highway Agency.