Structure 1816159 · Somerset County, NJ

Burnt Mills RD over I-78 And Ramps A & B

Carries Burnt Mills RD over I-78 And Ramps A & B, 0.48mi W. Of I-287.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT362 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

362 ft end to end, longest span 93 ft: about 5 semi-trucks nose to tail. 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.

Built1965rebuilt 2014
Length361.9 ft110.3 m
Daily traffic14counted 2023
Last inspectedOctober 2023every 24 months

Location

StateNew Jersey
CountySomerset
Location0.48mi W. Of I-287
CarriesBurnt Mills RD
CrossesI-78 And Ramps A & B
Coordinates40.64298, -74.65551

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length361.9 ft (110.3 m)
Max Span92.8 ft (28.3 m)
Deck Width44.0 ft (13.4 m)
Deck Area1478.0 sq m
Main Spans4
Year Built1965 (reconstructed 2014)

Traffic

Avg Daily Traffic14 (2023)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge9

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number1816159

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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