US Bridges

French Hill RD/640 over Singac Brook

Fair

Passaic County, New Jersey · S of Valley Road (cr 681) · Structure no. 1600134

Built
1948
77 years old, rebuilt 2007
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
33,122
2023 count
Owner
County
County Highway Agency

About this bridge

French Hill RD/640 over Singac Brook is a steel stringer/multi-beam or girder carrying French Hill RD/640 over Singac Brook in Passaic County, New Jersey. It was built in 1948 and reconstructed in 2007, so it is 77 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 33,122 vehicles a day, roughly 4% of them trucks, projected to reach 40,415 by 2043. The structure is 26 ft (7.9 m) long and 88 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFrench Hill RD/640
CrossesSingac Brook
LocationS of Valley Road (cr 681)
RouteCounty Highway 640
CountyPassaic County
StateNew Jersey
Coordinates40.91507, -74.24238
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating75 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span21 ft (6.4 m)
Deck width88 ft (26.8 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,122 (2023)
Projected traffic40,415 by 2043
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was French Hill RD/640 over Singac Brook built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2007.

What condition is French Hill RD/640 over Singac 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 April 2023.

How much traffic does French Hill RD/640 over Singac Brook carry?

About 33,122 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is French Hill RD/640 over Singac Brook?

The structure is 26 ft (7.9 m) long with a longest span of 21 ft (6.4 m) and a deck 88 ft wide.

Who owns French Hill RD/640 over Singac Brook?

It is owned by the County Highway Agency.