US Bridges

Plainfield AV(603) over Cedar Brook

Fair

Middlesex County, New Jersey · 0.13 Miles S of Lane Ave. · Structure no. 122B073

Built
1980
45 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
36 ft
2 main spans
Daily traffic
14,972
2023 count
Owner
County
County Highway Agency

About this bridge

Plainfield AV(603) over Cedar Brook is a concrete culvert carrying Plainfield AV(603) over Cedar Brook in Middlesex County, New Jersey. It was built in 1980, so it is 45 years old, younger 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 14,972 vehicles a day, roughly 4% of them trucks, projected to reach 18,268 by 2043. The structure is 36 ft (11 m) long and 75 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPlainfield AV(603)
CrossesCedar Brook
Location0.13 Miles S of Lane Ave.
RouteCounty Highway 603
CountyMiddlesex County
StateNew Jersey
Coordinates40.58283, -74.41395
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length36 ft (11 m)
Longest span22 ft (6.7 m)
Deck width75 ft (22.9 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,972 (2023)
Projected traffic18,268 by 2043
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Plainfield AV(603) over Cedar Brook built?

It was built in 1980, making it 45 years old in 2025.

What condition is Plainfield AV(603) over Cedar 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 Plainfield AV(603) over Cedar Brook carry?

About 14,972 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Plainfield AV(603) over Cedar Brook?

The structure is 36 ft (11 m) long with a longest span of 22 ft (6.7 m) and a deck 75 ft wide.

Who owns Plainfield AV(603) over Cedar Brook?

It is owned by the County Highway Agency.