US Bridges

Nj 18 SB over Shark River

Fair

Monmouth County, New Jersey · 1.0 MI South of Rt 33 JCT · Structure no. 1327163

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
116 ft
4 main spans
Daily traffic
21,140
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 18 SB over Shark River is a prestressed concrete box beam or girders - multiple carrying Nj 18 SB over Shark River in Monmouth County, New Jersey. It was built in 1968, so it is 57 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 21,140 vehicles a day, roughly 5% of them trucks, projected to reach 25,795 by 2042. The structure is 116 ft (35.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNj 18 SB
CrossesShark River
Location1.0 MI South of Rt 33 JCT
RouteState Highway 18
Coordinates40.19344, -74.05993
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,140 (2022)
Projected traffic25,795 by 2042
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 18 SB over Shark River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Nj 18 SB over Shark 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 Nj 18 SB over Shark River carry?

About 21,140 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Nj 18 SB over Shark River?

The structure is 116 ft (35.4 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns Nj 18 SB over Shark River?

It is owned by the State Highway Agency.