Structure 18K1102 · Somerset County, NJ

Mountain Avenue over Corys Brook

Carries Mountain Avenue over Corys Brook, 0.2 Mi W Of Sawmill Road.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure9/9 · Excellent
Substructure9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT37 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 9/9Substructure 9/9

37 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.

Built201115 years old
Length37.1 ft11.3 m
Daily traffic4,006counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateNew Jersey
CountySomerset
Location0.2 Mi W Of Sawmill Road
CarriesMountain Avenue
CrossesCorys Brook
Coordinates40.65015, -74.50163

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length37.1 ft (11.3 m)
Max Span32.2 ft (9.8 m)
Deck Width36.4 ft (11.1 m)
Deck Area125.4 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic4,006 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number18K1102

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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