Structure 1405154 · Morris County, NJ

Maple Lake Road over Nj 23

Carries Maple Lake Road over Nj 23, 3.75 M N Of I-287 On Nj23.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT120 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

120 ft end to end. Lengths and the semi-truck 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.

Built1934rebuilt 1997
Length120.1 ft36.6 m
Daily traffic2,000counted 2023
Last inspectedMarch 2023every 24 months

Location

StateNew Jersey
CountyMorris
Location3.75 M N Of I-287 On Nj23
CarriesMaple Lake Road
CrossesNj 23
Coordinates41.00950, -74.36333

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length120.1 ft (36.6 m)
Max Span113.8 ft (34.7 m)
Deck Width31.5 ft (9.6 m)
Deck Area351.4 sq m
Main Spans1
Year Built1934 (reconstructed 1997)

Traffic

Avg Daily Traffic2,000 (2023)
Truck Traffic1%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1405154

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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