US Bridges

SR-817 (nw 27AV) over Biscayne Canal C-8

Good

Miami-Dade County, Florida · NW 27AV & Biscayne Canal · Structure no. 870151

Built
1961
64 years old, rebuilt 1976
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
2 main spans
Daily traffic
37,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR-817 (nw 27AV) over Biscayne Canal C-8 is a prestressed concrete stringer/multi-beam or girder carrying SR-817 (nw 27AV) over Biscayne Canal C-8 in Miami-Dade County, Florida. It was built in 1961 and reconstructed in 1976, so it is 64 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 37,000 vehicles a day, roughly 5% of them trucks, projected to reach 64,195 by 2044. The structure is 100 ft (30.5 m) long and 100 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSR-817 (nw 27AV)
CrossesBiscayne Canal C-8
LocationNW 27AV & Biscayne Canal
RouteState Highway 817
StateFlorida
Coordinates25.91548, -80.2443
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 protection7 GoodSome minor problems.
Last inspectionJune 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.7 US tons
Inventory rating43.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length100 ft (30.5 m)
Longest span50 ft (15.2 m)
Deck width100 ft (30.5 m)
Roadway width87 ft (26.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2022)
Projected traffic64,195 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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-817 (nw 27AV) over Biscayne Canal C-8 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1976.

What condition is SR-817 (nw 27AV) 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 June 2024.

How much traffic does SR-817 (nw 27AV) over Biscayne Canal C-8 carry?

About 37,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is SR-817 (nw 27AV) over Biscayne Canal C-8?

The structure is 100 ft (30.5 m) long with a longest span of 50 ft (15.2 m) and a deck 100 ft wide.

Who owns SR-817 (nw 27AV) over Biscayne Canal C-8?

It is owned by the State Highway Agency.