US Bridges

Route Nj 21 over Park Ave (cr 646)

Fair

Essex County, New Jersey · 1.3 MI S of Nj 3 · Structure no. 0717156

Built
1959
66 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
72 ft
1 main span
Daily traffic
75,430
2023 count
Owner
State
State Highway Agency

About this bridge

Route Nj 21 over Park Ave (cr 646) is a steel stringer/multi-beam or girder carrying Route Nj 21 over Park Ave (cr 646) in Essex 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 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 75,430 vehicles a day, roughly 5% of them trucks, projected to reach 92,030 by 2043. The structure is 72 ft (21.9 m) long and 111 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRoute Nj 21
CrossesPark Ave (cr 646)
Location1.3 MI S of Nj 3
RouteState Highway 21
CountyEssex County
StateNew Jersey
Coordinates40.81109, -74.1394
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span68 ft (20.7 m)
Deck width111 ft (33.7 m)
Roadway width101 ft (30.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75,430 (2023)
Projected traffic92,030 by 2043
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route Nj 21 over Park Ave (cr 646) built?

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

What condition is Route Nj 21 over Park Ave (cr 646) 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 February 2023.

How much traffic does Route Nj 21 over Park Ave (cr 646) carry?

About 75,430 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Route Nj 21 over Park Ave (cr 646)?

The structure is 72 ft (21.9 m) long with a longest span of 68 ft (20.7 m) and a deck 111 ft wide.

Who owns Route Nj 21 over Park Ave (cr 646)?

It is owned by the State Highway Agency.