Structure 18D1304 · Somerset County, NJ

Jackson Avenue over Peapack Brook

Carries Jackson Avenue over Peapack Brook, At Main ST Intersection.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT36 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

36 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.

Built1920rebuilt 1982
Length36.1 ft11 m
Daily traffic1,483counted 2023
Last inspectedOctober 2023every 24 months

Location

StateNew Jersey
CountySomerset
LocationAt Main ST Intersection
CarriesJackson Avenue
CrossesPeapack Brook
Coordinates40.72485, -74.66801

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length36.1 ft (11 m)
Max Span32.2 ft (9.8 m)
Deck Width31.2 ft (9.5 m)
Deck Area104.5 sq m
Main Spans1
Year Built1920 (reconstructed 1982)

Traffic

Avg Daily Traffic1,483 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number18D1304

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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