US Bridges

Union Ave (cr 646) over Molly Anns Brook

Fair

Passaic County, New Jersey · 1.1 MI NE Totowa RD-CR644 · Structure no. 1600113

Built
1904
121 years old, rebuilt 1994
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
17,565
2023 count
Owner
County
County Highway Agency

About this bridge

Union Ave (cr 646) over Molly Anns Brook is a prestressed concrete box beam or girders - multiple carrying Union Ave (cr 646) over Molly Anns Brook in Passaic County, New Jersey. It was built in 1904 and reconstructed in 1994, so it is 121 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 17,565 vehicles a day, roughly 4% of them trucks, projected to reach 21,430 by 2043. The structure is 66 ft (20.1 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUnion Ave (cr 646)
CrossesMolly Anns Brook
Location1.1 MI NE Totowa RD-CR644
RouteCounty Highway 646
CountyPassaic County
StateNew Jersey
Coordinates40.91554, -74.19394
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length66 ft (20.1 m)
Longest span63 ft (19.2 m)
Deck width74 ft (22.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,565 (2023)
Projected traffic21,430 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Union Ave (cr 646) over Molly Anns Brook built?

It was built in 1904, making it 121 years old in 2025. It was reconstructed in 1994.

What condition is Union Ave (cr 646) over Molly Anns 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 2023.

How much traffic does Union Ave (cr 646) over Molly Anns Brook carry?

About 17,565 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Union Ave (cr 646) over Molly Anns Brook?

The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 74 ft wide.

Who owns Union Ave (cr 646) over Molly Anns Brook?

It is owned by the County Highway Agency.