US Bridges

US-17 (SR-5) over Nassau River

Fair

Duval County, Florida · US-17 over Nassau River · Structure no. 720688

Built
2001
24 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
636 ft
8 main spans
Daily traffic
19,000
2023 count
Owner
State
State Highway Agency

About this bridge

US-17 (SR-5) over Nassau River is a prestressed concrete stringer/multi-beam or girder carrying US-17 (SR-5) over Nassau River in Duval County, Florida. It was built in 2001, so it is 24 years old, younger 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 19,000 vehicles a day, roughly 6% of them trucks, projected to reach 32,965 by 2045. The structure is 636 ft (194 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS-17 (SR-5)
CrossesNassau River
LocationUS-17 over Nassau River
RouteU.S. Route 17
StateFlorida
Coordinates30.57528, -81.60833
Functional classRural Principal Arterial - Other

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 inspectionJune 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length636 ft (194 m)
Longest span105 ft (32 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2023)
Projected traffic32,965 by 2045
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-17 (SR-5) over Nassau River built?

It was built in 2001, making it 24 years old in 2025.

What condition is US-17 (SR-5) over Nassau 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 June 2024.

How much traffic does US-17 (SR-5) over Nassau River carry?

About 19,000 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US-17 (SR-5) over Nassau River?

The structure is 636 ft (194 m) long with a longest span of 105 ft (32 m) and a deck 47 ft wide.

Who owns US-17 (SR-5) over Nassau River?

It is owned by the State Highway Agency.