US Bridges

Mechlin Corner Rd. over I-78 & US 22

Fair

Hunterdon County, New Jersey · 4.18 MI West of Rt 31 · Structure no. 1015162

Built
1968
57 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
174 ft
2 main spans
Daily traffic
5,242
2024 count
Owner
State
State Highway Agency

About this bridge

Mechlin Corner Rd. over I-78 & US 22 is a prestressed concrete stringer/multi-beam or girder carrying Mechlin Corner Rd. over I-78 & US 22 in Hunterdon County, New Jersey. It was built in 1968, so it is 57 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 5,242 vehicles a day, roughly 3% of them trucks, projected to reach 6,291 by 2044. The structure is 174 ft (53 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMechlin Corner Rd.
CrossesI-78 & US 22
Location4.18 MI West of Rt 31
RouteCounty Highway 625
CountyHunterdon County
StateNew Jersey
Coordinates40.63484, -74.96936
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length174 ft (53 m)
Longest span84 ft (25.6 m)
Deck width46 ft (14 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,242 (2024)
Projected traffic6,291 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
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$86,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mechlin Corner Rd. over I-78 & US 22 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Mechlin Corner Rd. over I-78 & US 22 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 May 2024.

How much traffic does Mechlin Corner Rd. over I-78 & US 22 carry?

About 5,242 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Mechlin Corner Rd. over I-78 & US 22?

The structure is 174 ft (53 m) long with a longest span of 84 ft (25.6 m) and a deck 46 ft wide.

Who owns Mechlin Corner Rd. over I-78 & US 22?

It is owned by the State Highway Agency.