US Bridges

US-ALT-1 (SR115)NB over Ramp to E 21 Street

Good

Duval County, Florida · SR-115 NB · Structure no. 720726

Built
2014
11 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
24,000
2022 count
Owner
State
State Highway Agency

About this bridge

US-ALT-1 (SR115)NB over Ramp to E 21 Street is a prestressed concrete stringer/multi-beam or girder carrying US-ALT-1 (SR115)NB over Ramp to E 21 Street in Duval County, Florida. It was built in 2014, so it is 11 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,000 vehicles a day, roughly 13% of them trucks, projected to reach 41,640 by 2042. The structure is 50 ft (15.1 m) long and 72 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS-ALT-1 (SR115)NB
CrossesRamp to E 21 Street
LocationSR-115 NB
RouteU.S. Route 0A1
StateFlorida
Coordinates30.35503, -81.63736
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.4 US tons
Inventory rating59.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length50 ft (15.1 m)
Longest span50 ft (15.1 m)
Deck width72 ft (22 m)
Roadway width64 ft (19.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,000 (2022)
Projected traffic41,640 by 2042
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
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 (SR115)NB over Ramp to E 21 Street built?

It was built in 2014, making it 11 years old in 2025.

What condition is US-ALT-1 (SR115)NB over Ramp to E 21 Street 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 December 2023.

How much traffic does US-ALT-1 (SR115)NB over Ramp to E 21 Street carry?

About 24,000 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US-ALT-1 (SR115)NB over Ramp to E 21 Street?

The structure is 50 ft (15.1 m) long with a longest span of 50 ft (15.1 m) and a deck 72 ft wide.

Who owns US-ALT-1 (SR115)NB over Ramp to E 21 Street?

It is owned by the State Highway Agency.