US Bridges

Nj 31 NB over Beaver Brook

Fair

Hunterdon County, New Jersey · North of 31/78 Jcn · Structure no. 1017159

Built
1966
59 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
16,289
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 31 NB over Beaver Brook is a concrete culvert carrying Nj 31 NB over Beaver Brook in Hunterdon County, New Jersey. It was built in 1966, so it is 59 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 16,289 vehicles a day, roughly 4% of them trucks, projected to reach 19,873 by 2042. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 31 NB
CrossesBeaver Brook
LocationNorth of 31/78 Jcn
RouteState Highway 31
CountyHunterdon County
StateNew Jersey
Coordinates40.63862, -74.88823
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
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 typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic16,289 (2022)
Projected traffic19,873 by 2042
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nj 31 NB over Beaver Brook built?

It was built in 1966, making it 59 years old in 2025.

What condition is Nj 31 NB over Beaver 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 2024.

How much traffic does Nj 31 NB over Beaver Brook carry?

About 16,289 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 31 NB over Beaver Brook?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m).

Who owns Nj 31 NB over Beaver Brook?

It is owned by the State Highway Agency.