US Bridges

CR 16A over San Sebastian River

Fair

St. Johns County, Florida · 0.4 MI W of US 1 · Structure no. 784057

Built
1969
56 years old, rebuilt 2010
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
6,200
2023 count
Owner
County
County Highway Agency

About this bridge

CR 16A over San Sebastian River is a concrete culvert carrying CR 16A over San Sebastian River in St. Johns County, Florida. It was built in 1969 and reconstructed in 2010, so it is 56 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 6,200 vehicles a day, roughly 3% of them trucks, projected to reach 10,757 by 2042. The structure is 21 ft (6.3 m) long.

Location

Open in Google Maps
CarriesCR 16A
CrossesSan Sebastian River
Location0.4 MI W of US 1
RouteCounty Highway 16A
CountySt. Johns County
StateFlorida
Coordinates29.93947, -81.34078
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating44.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.3 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2023)
Projected traffic10,757 by 2042
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 16A over San Sebastian River built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2010.

What condition is CR 16A over San Sebastian 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 October 2023.

How much traffic does CR 16A over San Sebastian River carry?

About 6,200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is CR 16A over San Sebastian River?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3.2 m).

Who owns CR 16A over San Sebastian River?

It is owned by the County Highway Agency.