US Bridges

Nj Route 18 N.B. over Shark River

Fair

Monmouth County, New Jersey · 1.88 MI N of Nj 138 Jct. · Structure no. 1327162

Built
1968
57 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
116 ft
4 main spans
Daily traffic
23,657
2023 count
Owner
State
State Highway Agency

About this bridge

Nj Route 18 N.B. over Shark River is a prestressed concrete box beam or girders - multiple carrying Nj Route 18 N.B. 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 23,657 vehicles a day, roughly 5% of them trucks, projected to reach 28,866 by 2043. 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).

Location

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CarriesNj Route 18 N.B.
CrossesShark River
Location1.88 MI N of Nj 138 Jct.
RouteState Highway 18
CountyMonmouth County
StateNew Jersey
Coordinates40.19296, -74.05997
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length116 ft (35.4 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,657 (2023)
Projected traffic28,866 by 2043
Trucks5%
Lanes on structure3
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$892,000 (2023 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Nj Route 18 N.B. over Shark River built?

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

What condition is Nj Route 18 N.B. 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 April 2023.

How much traffic does Nj Route 18 N.B. over Shark River carry?

About 23,657 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj Route 18 N.B. 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 Route 18 N.B. over Shark River?

It is owned by the State Highway Agency.