US Bridges

NB Ent to Gsp over Mill Road

Fair

Union County, New Jersey · 0.4 MI NE of GSP&I-78 JCT · Structure no. 361432A

Built
1974
51 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
16,280
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

NB Ent to Gsp over Mill Road is a steel stringer/multi-beam or girder carrying NB Ent to Gsp over Mill Road in Union County, New Jersey. It was built in 1974, so it is 51 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 16,280 vehicles a day, roughly 1% of them trucks, projected to reach 22,383 by 2043. The structure is 68 ft (20.7 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNB Ent to Gsp
CrossesMill Road
Location0.4 MI NE of GSP&I-78 JCT
CountyUnion County
StateNew Jersey
Coordinates40.71116, -74.24394
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length68 ft (20.7 m)
Longest span68 ft (20.7 m)
Deck width25 ft (7.6 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,280 (2023)
Projected traffic22,383 by 2043
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a toll road
National Highway SystemYes

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 NB Ent to Gsp over Mill Road built?

It was built in 1974, making it 51 years old in 2025.

What condition is NB Ent to Gsp over Mill 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 July 2023.

How much traffic does NB Ent to Gsp over Mill Road carry?

About 16,280 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is NB Ent to Gsp over Mill Road?

The structure is 68 ft (20.7 m) long with a longest span of 68 ft (20.7 m) and a deck 25 ft wide.

Who owns NB Ent to Gsp over Mill Road?

It is owned by the State Toll Authority.