Structure 1109151 · Mercer County, NJ

Nj 29 over Nj 175& D&r Canal Feeder

Carries Nj 29 over Nj 175& D&r Canal Feeder, 0.27 Mi North Of I-95 Jct.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT412 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

412 ft end to end, longest span 103 ft: about 6 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.

Built1960rebuilt 1984
Length412.1 ft125.6 m
Daily traffic13,593counted 2022
Last inspectedAugust 2024every 24 months

Location

StateNew Jersey
CountyMercer
Location0.27 Mi North Of I-95 Jct
CarriesNj 29
CrossesNj 175& D&r Canal Feeder
Coordinates40.26326, -74.84663

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length412.1 ft (125.6 m)
Max Span103.0 ft (31.4 m)
Deck Width38.4 ft (11.7 m)
Deck Area1469.5 sq m
Main Spans5
Year Built1960 (reconstructed 1984)

Traffic

Avg Daily Traffic13,593 (2022)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number1109151

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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