Structure 2455 · Allegheny County, PA

Stanwix ST over I-376 WB (parkway East)

Carries Stanwix ST over I-376 WB (parkway East), 106 Stanwix ST Bridge.

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 girder bridge.

Built1939rebuilt 2002
Length70.9 ft21.6 m
Daily traffic8,600counted 2022
Last inspectedDecember 2022every 24 months

Location

StatePennsylvania
CountyAllegheny
Location106 Stanwix ST Bridge
CarriesStanwix ST
CrossesI-376 WB (parkway East)
Coordinates40.43841, -80.00590

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length70.9 ft (21.6 m)
Max Span66.9 ft (20.4 m)
Deck Width86.6 ft (26.4 m)
Deck Area570.2 sq m
Main Spans1
Year Built1939 (reconstructed 2002)

Traffic

Avg Daily Traffic8,600 (2022)
Truck Traffic5%
Lanes On Bridge3
Lanes Under Bridge3

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002455

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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