US Bridges

I-287 NB over Ross Brook

Fair

Somerset County, New Jersey · 1.8MI North of US 22 JCT · Structure no. 1813157

Built
1963
62 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
49,715
2024 count
Owner
State
State Highway Agency

About this bridge

I-287 NB over Ross Brook is a concrete culvert carrying I-287 NB over Ross Brook in Somerset County, New Jersey. It was built in 1963, 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 49,715 vehicles a day, roughly 9% of them trucks, projected to reach 59,655 by 2044. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-287 NB
CrossesRoss Brook
Location1.8MI North of US 22 JCT
RouteInterstate 287
CountySomerset County
StateNew Jersey
Coordinates40.58249, -74.60063
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 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 evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,715 (2024)
Projected traffic59,655 by 2044
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-287 NB over Ross Brook built?

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

What condition is I-287 NB over Ross Brook 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 I-287 NB over Ross Brook carry?

About 49,715 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I-287 NB over Ross Brook?

The structure is 23 ft (7 m) long with a longest span of 9 ft (2.7 m).

Who owns I-287 NB over Ross Brook?

It is owned by the State Highway Agency.