US Bridges

US 1 (sr 5) over Toms Harbor Channel

Good

Monroe County, Florida · Duck Key (mm 60.4) · Structure no. 900100

Built
1980
45 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,519 ft
17 main spans
Daily traffic
12,700
2023 count
Owner
State
State Highway Agency

About this bridge

US 1 (sr 5) over Toms Harbor Channel is a prestressed concrete stringer/multi-beam or girder carrying US 1 (sr 5) over Toms Harbor Channel in Monroe County, Florida. It was built in 1980, so it is 45 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 12,700 vehicles a day, roughly 16% of them trucks, projected to reach 22,034 by 2042. The structure is 1,519 ft (463 m) long and 39 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesUS 1 (sr 5)
CrossesToms Harbor Channel
LocationDuck Key (mm 60.4)
RouteU.S. Route 1
CountyMonroe County
StateFlorida
Coordinates24.77794, -80.92123
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 inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20
Structure length1,519 ft (463 m)
Longest span93 ft (28.3 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,700 (2023)
Projected traffic22,034 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US 1 (sr 5) over Toms Harbor Channel built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 1 (sr 5) over Toms Harbor Channel 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 August 2023.

How much traffic does US 1 (sr 5) over Toms Harbor Channel carry?

About 12,700 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 1 (sr 5) over Toms Harbor Channel?

The structure is 1,519 ft (463 m) long with a longest span of 93 ft (28.3 m) and a deck 39 ft wide.

Who owns US 1 (sr 5) over Toms Harbor Channel?

It is owned by the State Highway Agency.