US Bridges

Plainfield Avenue over Green Brook

Fair

Union County, New Jersey · 0.19 Miles North of I-78 · Structure no. 2001013

Built
1916
109 years old, rebuilt 1968
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
9,918
2024 count
Owner
County
County Highway Agency

About this bridge

Plainfield Avenue over Green Brook is a concrete culvert carrying Plainfield Avenue over Green Brook in Union County, New Jersey. It was built in 1916 and reconstructed in 1968, so it is 109 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 9,918 vehicles a day, roughly 4% of them trucks, projected to reach 12,102 by 2044. The structure is 30 ft (9.1 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPlainfield Avenue
CrossesGreen Brook
Location0.19 Miles North of I-78
RouteCounty Highway 641
CountyUnion County
StateNew Jersey
Coordinates40.66378, -74.42871
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating28 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span21 ft (6.4 m)
Deck width50 ft (15.2 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,918 (2024)
Projected traffic12,102 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$100,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Plainfield Avenue over Green Brook built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 1968.

What condition is Plainfield Avenue over 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 March 2024.

How much traffic does Plainfield Avenue over Green Brook carry?

About 9,918 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Plainfield Avenue over Green Brook?

The structure is 30 ft (9.1 m) long with a longest span of 21 ft (6.4 m) and a deck 50 ft wide.

Who owns Plainfield Avenue over Green Brook?

It is owned by the County Highway Agency.