US Bridges

Mantua RD (cr 678) over Nj Turnpike

Fair

Gloucester County, New Jersey · 4.8 MI North of Exit 2 · Structure no. M017980

Built
1950
75 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
166 ft
4 main spans
Daily traffic
1,301
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

Mantua RD (cr 678) over Nj Turnpike is a steel continuous stringer/multi-beam or girder carrying Mantua RD (cr 678) over Nj Turnpike in Gloucester County, New Jersey. It was built in 1950, so it is 75 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 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 1,301 vehicles a day, roughly 4% of them trucks, projected to reach 1,587 by 2044. The structure is 166 ft (50.6 m) long and 50 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMantua RD (cr 678)
CrossesNj Turnpike
Location4.8 MI North of Exit 2
RouteCounty Highway 678
CountyGloucester County
StateNew Jersey
Coordinates39.79811, -75.19964
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length166 ft (50.6 m)
Longest span51 ft (15.5 m)
Deck width50 ft (15.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,301 (2024)
Projected traffic1,587 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mantua RD (cr 678) over Nj Turnpike built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mantua RD (cr 678) over Nj Turnpike 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 February 2024.

How much traffic does Mantua RD (cr 678) over Nj Turnpike carry?

About 1,301 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mantua RD (cr 678) over Nj Turnpike?

The structure is 166 ft (50.6 m) long with a longest span of 51 ft (15.5 m) and a deck 50 ft wide.

Who owns Mantua RD (cr 678) over Nj Turnpike?

It is owned by the State Toll Authority.