Structure 31824 · Somerset County, PA

Pa Tpk (i-76) over SR 0160 (lr 55045)

Carries Pa Tpk (i-76) over SR 0160 (lr 55045), West Of Allegheny Tunnel.

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
CAR · 15 FT71 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

71 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 multi-beam bridge.

Built1939rebuilt 2003
Length70.9 ft21.6 m
Daily traffic29,452counted 1999
Last inspectedApril 2023every 48 months

Location

StatePennsylvania
CountySomerset
LocationWest Of Allegheny Tunnel
CarriesPa Tpk (i-76)
CrossesSR 0160 (lr 55045)
Coordinates39.96833, -78.87167

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length70.9 ft (21.6 m)
Max Span68.9 ft (21 m)
Deck Width99.4 ft (30.3 m)
Deck Area654.5 sq m
Main Spans1
Year Built1939 (reconstructed 2003)

Traffic

Avg Daily Traffic29,452 (1999)
Truck Traffic36%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 48 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000031824

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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