Structure 1140152 · Mercer County, NJ

Nj 129 SB over Us1;rmp Frm Us1nb&amtrak

Carries Nj 129 SB over Us1;rmp Frm Us1nb&amtrak, 2.3mi NW Of I295 & Nj Jct.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT537 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

537 ft end to end, longest span 128 ft: about 7 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built199432 years old
Length537.1 ft163.7 m
Daily traffic13,811counted 2022
Last inspectedOctober 2024every 24 months

Location

StateNew Jersey
CountyMercer
Location2.3mi NW Of I295 & Nj Jct
CarriesNj 129 SB
CrossesUs1;rmp Frm Us1nb&amtrak
Coordinates40.21544, -74.75724

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length537.1 ft (163.7 m)
Max Span128.0 ft (39 m)
Deck Width35.4 ft (10.8 m)
Deck Area1768.0 sq m
Main Spans5
Year Built1994

Traffic

Avg Daily Traffic13,811 (2022)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1140152

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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