US Bridges

SR-21 NB over Cedar River

Fair

Duval County, Florida · SR-21 NB over Cedar River · Structure no. 720326

Built
1967
58 years old, rebuilt 2002
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
660 ft
20 main spans
Daily traffic
17,578
2022 count
Owner
State
State Highway Agency

About this bridge

SR-21 NB over Cedar River is a prestressed concrete stringer/multi-beam or girder carrying SR-21 NB over Cedar River in Duval County, Florida. It was built in 1967 and reconstructed in 2002, so it is 58 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 17,578 vehicles a day, roughly 4% of them trucks, projected to reach 30,497 by 2044. The structure is 660 ft (201.2 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR-21 NB
CrossesCedar River
LocationSR-21 NB over Cedar River
RouteState Highway 21
CountyDuval County
StateFlorida
Coordinates30.27312, -81.73331
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.6 US tons
Inventory rating53.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length660 ft (201.2 m)
Longest span33 ft (10.1 m)
Deck width54 ft (16.6 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,578 (2022)
Projected traffic30,497 by 2044
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.3 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR-21 NB over Cedar River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2002.

What condition is SR-21 NB over Cedar 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 March 2023.

How much traffic does SR-21 NB over Cedar River carry?

About 17,578 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SR-21 NB over Cedar River?

The structure is 660 ft (201.2 m) long with a longest span of 33 ft (10.1 m) and a deck 54 ft wide.

Who owns SR-21 NB over Cedar River?

It is owned by the State Highway Agency.