US Bridges

I-78EB Frontage RD over Mulhockaway Creek

Fair

Hunterdon County, New Jersey · 0.56 MI E of I-78 Exit 11 · Structure no. 1015157

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
552
2023 count
Owner
State
State Highway Agency

About this bridge

I-78EB Frontage RD over Mulhockaway Creek is a prestressed concrete stringer/multi-beam or girder carrying I-78EB Frontage RD over Mulhockaway Creek 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 552 vehicles a day, roughly 3% of them trucks, projected to reach 673 by 2043. The structure is 72 ft (21.9 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-78EB Frontage RD
CrossesMulhockaway Creek
Location0.56 MI E of I-78 Exit 11
CountyHunterdon County
StateNew Jersey
Coordinates40.64064, -74.98895
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length72 ft (21.9 m)
Longest span67 ft (20.4 m)
Deck width41 ft (12.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic552 (2023)
Projected traffic673 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$496,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-78EB Frontage RD over Mulhockaway Creek built?

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

What condition is I-78EB Frontage RD over Mulhockaway Creek 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 2023.

How much traffic does I-78EB Frontage RD over Mulhockaway Creek carry?

About 552 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is I-78EB Frontage RD over Mulhockaway Creek?

The structure is 72 ft (21.9 m) long with a longest span of 67 ft (20.4 m) and a deck 41 ft wide.

Who owns I-78EB Frontage RD over Mulhockaway Creek?

It is owned by the State Highway Agency.