US Bridges

I-78 WB over Turkey Hill Road

Fair

Hunterdon County, New Jersey · 1.5 MI East of Exit 7 · Structure no. 1014158

Built
1960
65 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
114 ft
3 main spans
Daily traffic
55,375
2024 count
Owner
State
State Highway Agency

About this bridge

I-78 WB over Turkey Hill Road is a prestressed concrete stringer/multi-beam or girder carrying I-78 WB over Turkey Hill Road in Hunterdon County, New Jersey. It was built in 1960, so it is 65 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 55,375 vehicles a day, roughly 14% of them trucks, projected to reach 67,568 by 2044. The structure is 114 ft (34.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-78 WB
CrossesTurkey Hill Road
Location1.5 MI East of Exit 7
RouteInterstate 78
CountyHunterdon County
StateNew Jersey
Coordinates40.66067, -75.04346
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length114 ft (34.7 m)
Longest span37 ft (11.3 m)
Deck width56 ft (17.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,375 (2024)
Projected traffic67,568 by 2044
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-78 WB over Turkey Hill Road built?

It was built in 1960, making it 65 years old in 2025.

What condition is I-78 WB over Turkey Hill Road 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 March 2024.

How much traffic does I-78 WB over Turkey Hill Road carry?

About 55,375 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I-78 WB over Turkey Hill Road?

The structure is 114 ft (34.7 m) long with a longest span of 37 ft (11.3 m) and a deck 56 ft wide.

Who owns I-78 WB over Turkey Hill Road?

It is owned by the State Highway Agency.