US Bridges

31SB&I-78RMPS B&d over Beaver Brook

Fair

Hunterdon County, New Jersey · 0.09 MI North of I-78 · Structure no. 1017154

Built
1967
58 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
35 ft
1 main span
Daily traffic
14,861
2022 count
Owner
State
State Highway Agency

About this bridge

31SB&I-78RMPS B&d over Beaver Brook is a concrete culvert carrying 31SB&I-78RMPS B&d over Beaver Brook in Hunterdon County, New Jersey. It was built in 1967, so it is 58 years old, younger 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 14,861 vehicles a day, roughly 4% of them trucks, projected to reach 18,133 by 2042. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries31SB&I-78RMPS B&d
CrossesBeaver Brook
Location0.09 MI North of I-78
RouteState Highway 31
CountyHunterdon County
StateNew Jersey
Coordinates40.63772, -74.89164
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span35 ft (10.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,861 (2022)
Projected traffic18,133 by 2042
Trucks4%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 31SB&I-78RMPS B&d over Beaver Brook built?

It was built in 1967, making it 58 years old in 2025.

What condition is 31SB&I-78RMPS B&d 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 June 2024.

How much traffic does 31SB&I-78RMPS B&d over Beaver Brook carry?

About 14,861 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 31SB&I-78RMPS B&d over Beaver Brook?

The structure is 35 ft (10.7 m) long with a longest span of 35 ft (10.7 m).

Who owns 31SB&I-78RMPS B&d over Beaver Brook?

It is owned by the State Highway Agency.