US Bridges

North Bridge ST over I-287 NB

Fair

Somerset County, New Jersey · 2.2MI North of Rt 22 JCT · Structure no. 1813159

Built
1963
62 years old, rebuilt 2008
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
14,077
2024 count
Owner
State
State Highway Agency

About this bridge

North Bridge ST over I-287 NB is a prestressed concrete stringer/multi-beam or girder carrying North Bridge ST over I-287 NB in Somerset County, New Jersey. It was built in 1963 and reconstructed in 2008, so it is 62 years old, older 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 14,077 vehicles a day, roughly 4% of them trucks, projected to reach 17,176 by 2044. The structure is 150 ft (45.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNorth Bridge ST
CrossesI-287 NB
Location2.2MI North of Rt 22 JCT
RouteCounty Highway 639
CountySomerset County
StateNew Jersey
Coordinates40.58382, -74.60812
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length150 ft (45.7 m)
Longest span71 ft (21.6 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,077 (2024)
Projected traffic17,176 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$1.4 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was North Bridge ST over I-287 NB built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2008.

What condition is North Bridge ST over I-287 NB 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 North Bridge ST over I-287 NB carry?

About 14,077 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is North Bridge ST over I-287 NB?

The structure is 150 ft (45.7 m) long with a longest span of 71 ft (21.6 m) and a deck 45 ft wide.

Who owns North Bridge ST over I-287 NB?

It is owned by the State Highway Agency.