Structure 23570 · Lehigh County, PA

Pa Tpk (i-476) over T-707; Glencrest Road

Carries Pa Tpk (i-476) over T-707; Glencrest Road, North Of Neffs Borough.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

32 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 tee-beam bridge.

Built195571 years old
Length32.2 ft9.8 m
Daily traffic30,563counted 2004
Last inspectedAugust 2023every 24 months

Location

StatePennsylvania
CountyLehigh
LocationNorth Of Neffs Borough
CarriesPa Tpk (i-476)
CrossesT-707; Glencrest Road
Coordinates40.70365, -75.61043

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length32.2 ft (9.8 m)
Max Span27.9 ft (8.5 m)
Deck Width67.9 ft (20.7 m)
Deck Area202.9 sq m
Main Spans1
Year Built1955

Traffic

Avg Daily Traffic30,563 (2004)
Truck Traffic16%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000023570

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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