US Bridges

I-78 Ramp "c" over Beaver Brook

Good

Hunterdon County, New Jersey · 1 MI East of Rt 31 · Structure no. 1018152

Built
1962
63 years old, rebuilt 2012
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
3,162
2024 count
Owner
State
State Highway Agency

About this bridge

I-78 Ramp "c" over Beaver Brook is a prestressed concrete stringer/multi-beam or girder carrying I-78 Ramp "c" over Beaver Brook in Hunterdon County, New Jersey. It was built in 1962 and reconstructed in 2012, so it is 63 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,162 vehicles a day, roughly 9% of them trucks, projected to reach 3,858 by 2044. The structure is 72 ft (21.9 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-78 Ramp "c"
CrossesBeaver Brook
Location1 MI East of Rt 31
RouteInterstate 78
Coordinates40.64143, -74.87654
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating38.3 US tons
Inventory rating29.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length72 ft (21.9 m)
Longest span63 ft (19.2 m)
Deck width28 ft (8.5 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,162 (2024)
Projected traffic3,858 by 2044
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-78 Ramp "c" over Beaver Brook built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2012.

What condition is I-78 Ramp "c" over Beaver Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does I-78 Ramp "c" over Beaver Brook carry?

About 3,162 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is I-78 Ramp "c" over Beaver Brook?

The structure is 72 ft (21.9 m) long with a longest span of 63 ft (19.2 m) and a deck 28 ft wide.

Who owns I-78 Ramp "c" over Beaver Brook?

It is owned by the State Highway Agency.