US Bridges

SR-5 (US-1) over Snake Creek Canal

Fair

Monroe County, Florida · Plantation Key (mm 85.5) · Structure no. 900077

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Movable - Bascule
Steel
Length
850 ft
1 main span
Daily traffic
20,700
2024 count
Owner
State
State Highway Agency

About this bridge

SR-5 (US-1) over Snake Creek Canal is a steel movable - bascule carrying SR-5 (US-1) over Snake Creek Canal in Monroe County, Florida. It was built in 1981, so it is 44 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 20,700 vehicles a day, roughly 17% of them trucks, projected to reach 35,914 by 2044. The structure is 850 ft (259.1 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-5 (US-1)
CrossesSnake Creek Canal
LocationPlantation Key (mm 85.5)
RouteU.S. Route 1
CountyMonroe County
StateFlorida
Coordinates24.95225, -80.58767
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.2 US tons
Inventory rating41.4 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+10 approach)
Design loadHS 20
Structure length850 ft (259.1 m)
Longest span90 ft (27.5 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic20,700 (2024)
Projected traffic35,914 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.6 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-5 (US-1) over Snake Creek Canal built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR-5 (US-1) over Snake Creek Canal 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 September 2024.

How much traffic does SR-5 (US-1) over Snake Creek Canal carry?

About 20,700 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is SR-5 (US-1) over Snake Creek Canal?

The structure is 850 ft (259.1 m) long with a longest span of 90 ft (27.5 m) and a deck 43 ft wide.

Who owns SR-5 (US-1) over Snake Creek Canal?

It is owned by the State Highway Agency.