US Bridges

Nj 129 NB over AMTRAK NE Corridor

Fair

Mercer County, New Jersey · 0.17 MI N. of Hamilton Av · Structure no. 1140151

Built
1992
33 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
1 main span
Daily traffic
32,630
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 129 NB over AMTRAK NE Corridor is a steel stringer/multi-beam or girder carrying Nj 129 NB over AMTRAK NE Corridor in Mercer County, New Jersey. It was built in 1992, so it is 33 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 32,630 vehicles a day, roughly 4% of them trucks, projected to reach 39,156 by 2043. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNj 129 NB
CrossesAMTRAK NE Corridor
Location0.17 MI N. of Hamilton Av
RouteState Highway 129
Coordinates40.21584, -74.75685
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length120 ft (36.6 m)
Longest span117 ft (35.7 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,630 (2022)
Projected traffic39,156 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 Nj 129 NB over AMTRAK NE Corridor built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nj 129 NB over AMTRAK NE Corridor 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 October 2024.

How much traffic does Nj 129 NB over AMTRAK NE Corridor carry?

About 32,630 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 129 NB over AMTRAK NE Corridor?

The structure is 120 ft (36.6 m) long with a longest span of 117 ft (35.7 m) and a deck 31 ft wide.

Who owns Nj 129 NB over AMTRAK NE Corridor?

It is owned by the State Highway Agency.