US Bridges

W Oak ST (cr 624) over I-287 SB

Good

Somerset County, New Jersey · 5.7 MI No. of Nj 18 Jct. · Structure no. 1815172

Built
1966
59 years old, rebuilt 2006
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
3 main spans
Daily traffic
6,000
2024 count
Owner
State
State Highway Agency

About this bridge

W Oak ST (cr 624) over I-287 SB is a steel stringer/multi-beam or girder carrying W Oak ST (cr 624) over I-287 SB in Somerset County, New Jersey. It was built in 1966 and reconstructed in 2006, so it is 59 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,000 vehicles a day, roughly 3% of them trucks, projected to reach 7,240 by 2044. The structure is 132 ft (40.2 m) long and 45 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesW Oak ST (cr 624)
CrossesI-287 SB
Location5.7 MI No. of Nj 18 Jct.
RouteCounty Highway 624
CountySomerset County
StateNew Jersey
Coordinates40.70561, -74.56155
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating71.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length132 ft (40.2 m)
Longest span72 ft (21.9 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2024)
Projected traffic7,240 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 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$378,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was W Oak ST (cr 624) over I-287 SB built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2006.

What condition is W Oak ST (cr 624) over I-287 SB in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does W Oak ST (cr 624) over I-287 SB carry?

About 6,000 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is W Oak ST (cr 624) over I-287 SB?

The structure is 132 ft (40.2 m) long with a longest span of 72 ft (21.9 m) and a deck 45 ft wide.

Who owns W Oak ST (cr 624) over I-287 SB?

It is owned by the State Highway Agency.