Structure 1060155 · Hunterdon County, NJ

Mountain Road over Raritan Valley Line

Carries Mountain Road over Raritan Valley Line, 4.42mi SE I-78 & Us22 Jct.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT108 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

108 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 through truss.

Built1910rebuilt 1978
Length107.9 ft32.9 m
Daily traffic520counted 2023
Last inspectedJanuary 2023every 24 months

Location

StateNew Jersey
CountyHunterdon
Location4.42mi SE I-78 & Us22 Jct
CarriesMountain Road
CrossesRaritan Valley Line
Coordinates40.62219, -74.79075

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length107.9 ft (32.9 m)
Max Span104.0 ft (31.7 m)
Deck Width17.4 ft (5.3 m)
Deck Area174.4 sq m
Main Spans1
Year Built1910 (reconstructed 1978)

Traffic

Avg Daily Traffic520 (2023)
Truck Traffic3%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 24 months
OwnerUnknown
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1060155

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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