Structure 724150 · Essex County, NJ

I-78 over Frelnghysen Av Rr Ditch

Carries I-78 over Frelnghysen Av Rr Ditch, 2.2 Mi W Of Njtpk Exit 14.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,237 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

2,237 ft end to end, longest span 169 ft: about 6.2 football fields. 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.

Built1972rebuilt 2001
Length2236.9 ft681.8 m
Daily traffic169,624counted 2023
Last inspectedMarch 2023every 24 months

Location

StateNew Jersey
CountyEssex
Location2.2 Mi W Of Njtpk Exit 14
CarriesI-78
CrossesFrelnghysen Av Rr Ditch
Coordinates40.70852, -74.19212

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length2236.9 ft (681.8 m)
Max Span169.0 ft (51.5 m)
Deck Width199.5 ft (60.8 m)
Deck Area41453.4 sq m
Main Spans23
Year Built1972 (reconstructed 2001)

Traffic

Avg Daily Traffic169,624 (2023)
Truck Traffic9%
Lanes On Bridge10
Lanes Under Bridge5

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number0724150

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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