Structure 4320040P0000000 · Sussex County, NJ

Main Street over Flat Brook

Carries Main Street over Flat Brook, Off Of Nps Road 615 (walp.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating3/9 · Serious
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 3/9 · sets the ratingSubstructure 6/9

69 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.

Built1889rebuilt 2013
Length68.6 ft20.9 m
Daily traffic302counted 2022
Last inspectedJanuary 2024every 24 months

Location

StateNew Jersey
CountySussex
LocationOff Of Nps Road 615 (walp
CarriesMain Street
CrossesFlat Brook
Coordinates41.15717, -74.87714

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length68.6 ft (20.9 m)
Max Span66.9 ft (20.4 m)
Deck Width12.1 ft (3.7 m)
Deck Area77.3 sq m
Main Spans1
Year Built1889 (reconstructed 2013)

Traffic

Avg Daily Traffic302 (2022)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerNational Park Service
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical7 — Countermeasures installed
Structure Number4320040P0000000

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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