US Bridges

Nj 31 over Pequest River

Fair

Warren County, New Jersey · 264 Ft South of US 46 JCT · Structure no. 2111155

Built
1922
103 years old
Condition
Fair
inspected February 2023
Type
Arch - Deck
Concrete
Length
116 ft
2 main spans
Daily traffic
6,145
2023 count
Owner
State
State Highway Agency

About this bridge

Nj 31 over Pequest River is a concrete arch - deck carrying Nj 31 over Pequest River in Warren County, New Jersey. It was built in 1922, so it is 103 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 6,145 vehicles a day, roughly 7% of them trucks, projected to reach 9,131 by 2043. The structure is 116 ft (35.4 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNj 31
CrossesPequest River
Location264 Ft South of US 46 JCT
RouteState Highway 31
CountyWarren County
StateNew Jersey
Coordinates40.83153, -75.00074
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span58 ft (17.7 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,145 (2023)
Projected traffic9,131 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 31 over Pequest River built?

It was built in 1922, making it 103 years old in 2025.

What condition is Nj 31 over Pequest River 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 Nj 31 over Pequest River carry?

About 6,145 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nj 31 over Pequest River?

The structure is 116 ft (35.4 m) long with a longest span of 58 ft (17.7 m) and a deck 33 ft wide.

Who owns Nj 31 over Pequest River?

It is owned by the State Highway Agency.