US Bridges

I-287 over Sky Brook

Fair

Somerset County, New Jersey · 2.46 MI S of Exit 13 · Structure no. 1812154

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
122,240
2023 count
Owner
State
State Highway Agency

About this bridge

I-287 over Sky Brook is a concrete culvert carrying I-287 over Sky Brook in Somerset County, New Jersey. It was built in 1959, so it is 66 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 122,240 vehicles a day, roughly 9% of them trucks, projected to reach 149,156 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-287
CrossesSky Brook
Location2.46 MI S of Exit 13
RouteInterstate 287
CountySomerset County
StateNew Jersey
Coordinates40.54123, -74.52667
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal 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 spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122,240 (2023)
Projected traffic149,156 by 2043
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 over Sky Brook built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-287 over Sky 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 May 2023.

How much traffic does I-287 over Sky Brook carry?

About 122,240 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-287 over Sky Brook?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns I-287 over Sky Brook?

It is owned by the State Highway Agency.