US Bridges

US-1 (main St.) over St. Johns River

Fair

Duval County, Florida · US-1 over St. Johns River · Structure no. 720022

Built
1941
84 years old
Condition
Fair
inspected August 2024
Type
Movable - Lift
Steel
Length
1,680 ft
1 main span
Daily traffic
13,800
2023 count
Owner
State
State Highway Agency

About this bridge

US-1 (main St.) over St. Johns River is a steel movable - lift carrying US-1 (main St.) over St. Johns River in Duval County, Florida. It was built in 1941, so it is 84 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 13,800 vehicles a day, roughly 4% of them trucks, projected to reach 23,943 by 2045. The structure is 1,680 ft (512.1 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS-1 (main St.)
CrossesSt. Johns River
LocationUS-1 over St. Johns River
RouteU.S. Route 1
CountyDuval County
StateFlorida
Coordinates30.3221, -81.65863
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating22 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckOpen grating
Main spans1 (+16 approach)
Design loadH 20
Structure length1,680 ft (512.1 m)
Longest span365 ft (111.3 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic13,800 (2023)
Projected traffic23,943 by 2045
Trucks4%
Lanes on structure4
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 statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$300,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US-1 (main St.) over St. Johns River built?

It was built in 1941, making it 84 years old in 2025.

What condition is US-1 (main St.) over St. Johns River 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 August 2024.

How much traffic does US-1 (main St.) over St. Johns River carry?

About 13,800 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US-1 (main St.) over St. Johns River?

The structure is 1,680 ft (512.1 m) long with a longest span of 365 ft (111.3 m) and a deck 44 ft wide.

Who owns US-1 (main St.) over St. Johns River?

It is owned by the State Highway Agency.