US Bridges

US-ALT-1 (SR-115) over US-17 (SR-5)

Fair

Duval County, Florida · US-ALT-1 / Main St. · Structure no. 720036

Built
1961
64 years old, rebuilt 2000
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
148 ft
3 main spans
Daily traffic
49,000
2022 count
Owner
State
State Highway Agency

About this bridge

US-ALT-1 (SR-115) over US-17 (SR-5) is a prestressed concrete stringer/multi-beam or girder carrying US-ALT-1 (SR-115) over US-17 (SR-5) in Duval County, Florida. It was built in 1961 and reconstructed in 2000, so it is 64 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 49,000 vehicles a day, roughly 13% of them trucks, projected to reach 85,015 by 2044. The structure is 148 ft (45.1 m) long and 103 ft wide.

Location

Open in Google Maps
CarriesUS-ALT-1 (SR-115)
CrossesUS-17 (SR-5)
LocationUS-ALT-1 / Main St.
RouteU.S. Route 0A1
CountyDuval County
StateFlorida
Coordinates30.35634, -81.65389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span75 ft (22.9 m)
Deck width103 ft (31.5 m)
Roadway width98 ft (29.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,000 (2022)
Projected traffic85,015 by 2044
Trucks13%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-ALT-1 (SR-115) over US-17 (SR-5) built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2000.

What condition is US-ALT-1 (SR-115) over US-17 (SR-5) 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 2023.

How much traffic does US-ALT-1 (SR-115) over US-17 (SR-5) carry?

About 49,000 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US-ALT-1 (SR-115) over US-17 (SR-5)?

The structure is 148 ft (45.1 m) long with a longest span of 75 ft (22.9 m) and a deck 103 ft wide.

Who owns US-ALT-1 (SR-115) over US-17 (SR-5)?

It is owned by the State Highway Agency.