Structure 1014150 · Hunterdon County, NJ

I-78 EB over Nj 173

Carries I-78 EB over Nj 173, At Exit 7 Of I-78.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT93 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 5/9 · sets the rating

93 ft end to end. Lengths and the car 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.

Built1959rebuilt 1984
Length92.8 ft28.3 m
Daily traffic50,775counted 2024
Last inspectedJuly 2024every 24 months

Location

StateNew Jersey
CountyHunterdon
LocationAt Exit 7 Of I-78
CarriesI-78 EB
CrossesNj 173
Coordinates40.65995, -75.07093

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length92.8 ft (28.3 m)
Max Span88.9 ft (27.1 m)
Deck Width58.4 ft (17.8 m)
Deck Area503.7 sq m
Main Spans1
Year Built1959 (reconstructed 1984)

Traffic

Avg Daily Traffic50,775 (2024)
Truck Traffic9%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number1014150

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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