US Bridges

Washington Ave. over Trib. Green Brook

Fair

Somerset County, New Jersey · 0.32 MI S of US 22 · Structure no. 18L0907

Built
1964
61 years old, rebuilt 1979
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
15,514
2023 count
Owner
County
County Highway Agency

About this bridge

Washington Ave. over Trib. Green Brook is a prestressed concrete box beam or girders - multiple carrying Washington Ave. over Trib. Green Brook in Somerset County, New Jersey. It was built in 1964 and reconstructed in 1979, so it is 61 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 5 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 15,514 vehicles a day, roughly 4% of them trucks, projected to reach 18,930 by 2043. The structure is 32 ft (9.8 m) long and 62 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWashington Ave.
CrossesTrib. Green Brook
Location0.32 MI S of US 22
RouteCounty Highway 529
CountySomerset County
StateNew Jersey
Coordinates40.59998, -74.47179
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width62 ft (18.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,514 (2023)
Projected traffic18,930 by 2043
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$210,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Washington Ave. over Trib. Green Brook built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1979.

What condition is Washington Ave. over Trib. Green 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 October 2023.

How much traffic does Washington Ave. over Trib. Green Brook carry?

About 15,514 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Washington Ave. over Trib. Green Brook?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 62 ft wide.

Who owns Washington Ave. over Trib. Green Brook?

It is owned by the County Highway Agency.