US Bridges

US-1 SB over St. Joe Canal

Fair

Flagler County, Florida · US-1 SB over ST Joe Canal · Structure no. 730006

Built
1928
97 years old, rebuilt 1948
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
74 ft
4 main spans
Daily traffic
6,050
2022 count
Owner
State
State Highway Agency

About this bridge

US-1 SB over St. Joe Canal is a concrete slab carrying US-1 SB over St. Joe Canal in Flagler County, Florida. It was built in 1928 and reconstructed in 1948, so it is 97 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 6 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 6,050 vehicles a day, roughly 10% of them trucks, projected to reach 10,497 by 2044. The structure is 74 ft (22.5 m) long and 33 ft wide.

CarriesUS-1 SB
CrossesSt. Joe Canal
LocationUS-1 SB over ST Joe Canal
RouteU.S. Route 5
StateFlorida
Coordinates29.55525, -81.26633
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 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 rating61.2 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length74 ft (22.5 m)
Longest span18 ft (5.5 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,050 (2022)
Projected traffic10,497 by 2044
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$331,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US-1 SB over St. Joe Canal built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1948.

What condition is US-1 SB over St. Joe 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 May 2023.

How much traffic does US-1 SB over St. Joe Canal carry?

About 6,050 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US-1 SB over St. Joe Canal?

The structure is 74 ft (22.5 m) long with a longest span of 18 ft (5.5 m) and a deck 33 ft wide.

Who owns US-1 SB over St. Joe Canal?

It is owned by the State Highway Agency.