US Bridges

Nj 18 NB over Squankum Road

Fair

Monmouth County, New Jersey · 0.9 MI North of Gsp JCT · Structure no. 1323166

Built
1979
46 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
3 main spans
Daily traffic
20,582
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 18 NB over Squankum Road is a steel stringer/multi-beam or girder carrying Nj 18 NB over Squankum Road in Monmouth County, New Jersey. It was built in 1979, so it is 46 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 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 20,582 vehicles a day, roughly 5% of them trucks, projected to reach 24,698 by 2043. The structure is 182 ft (55.5 m) long and 48 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNj 18 NB
CrossesSquankum Road
Location0.9 MI North of Gsp JCT
RouteState Highway 18
CountyMonmouth County
StateNew Jersey
Coordinates40.28412, -74.10104
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span93 ft (28.3 m)
Deck width48 ft (14.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,582 (2023)
Projected traffic24,698 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 18 NB over Squankum Road built?

It was built in 1979, making it 46 years old in 2025.

What condition is Nj 18 NB over Squankum Road 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 July 2023.

How much traffic does Nj 18 NB over Squankum Road carry?

About 20,582 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nj 18 NB over Squankum Road?

The structure is 182 ft (55.5 m) long with a longest span of 93 ft (28.3 m) and a deck 48 ft wide.

Who owns Nj 18 NB over Squankum Road?

It is owned by the State Highway Agency.