US Bridges

SR-10A (mathews) over St. Johns Rv. & ALT-US-1

Fair

Duval County, Florida · SR-10A / St. Johns River · Structure no. 720076

Built
1953
72 years old
Condition
Fair
inspected March 2024
Type
Truss - Thru
Steel Continuous
Length
7,376 ft
6 main spans
Daily traffic
78,000
2023 count
Owner
State
State Highway Agency

About this bridge

SR-10A (mathews) over St. Johns Rv. & ALT-US-1 is a steel continuous truss - thru carrying SR-10A (mathews) over St. Johns Rv. & ALT-US-1 in Duval County, Florida. It was built in 1953, so it is 72 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 78,000 vehicles a day, roughly 3% of them trucks, projected to reach 133,380 by 2045. The structure is 7,376 ft (2,248.1 m) long and 58 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSR-10A (mathews)
CrossesSt. Johns Rv. & ALT-US-1
LocationSR-10A / St. Johns River
RouteState Highway 10A
CountyDuval County
StateFlorida
Coordinates30.32722, -81.6225
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.4 US tons
Inventory rating18 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+59 approach)
Design loadH 15
Structure length7,376 ft (2,248.1 m)
Longest span810 ft (246.9 m)
Deck width58 ft (17.7 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deck21 ft (6.3 m)

Traffic and service

Average daily traffic78,000 (2023)
Projected traffic133,380 by 2045
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed5 mi (8 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$4.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-10A (mathews) over St. Johns Rv. & ALT-US-1 built?

It was built in 1953, making it 72 years old in 2025.

What condition is SR-10A (mathews) over St. Johns Rv. & ALT-US-1 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 March 2024.

How much traffic does SR-10A (mathews) over St. Johns Rv. & ALT-US-1 carry?

About 78,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR-10A (mathews) over St. Johns Rv. & ALT-US-1?

The structure is 7,376 ft (2,248.1 m) long with a longest span of 810 ft (246.9 m) and a deck 58 ft wide.

Who owns SR-10A (mathews) over St. Johns Rv. & ALT-US-1?

It is owned by the State Highway Agency.