Structure 45615 · Northampton County, PA

I-78 EB over SR 611

Carries I-78 EB over SR 611, 0.24 Mi NW Of Delaware R..

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

204 ft end to end, longest span 69 ft: about 3 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 box-beam bridge.

Built198640 years old
Length204.1 ft62.2 m
Daily traffic31,800counted 2022
Last inspectedJune 2023every 24 months

Location

StatePennsylvania
CountyNorthampton
Location0.24 Mi NW Of Delaware R.
CarriesI-78 EB
CrossesSR 611
Coordinates40.67530, -75.18110

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length204.1 ft (62.2 m)
Max Span68.9 ft (21 m)
Deck Width51.5 ft (15.7 m)
Deck Area976.5 sq m
Main Spans3
Year Built1986

Traffic

Avg Daily Traffic31,800 (2022)
Truck Traffic24%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000045615

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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