Structure 1116 · Allegheny County, PA

I-376 EB over Mon River & Warf 376 WB

Carries I-376 EB over Mon River & Warf 376 WB, Fort Pitt Bridge.

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
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT686 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

686 ft end to end, longest span 170 ft: about 1.9 football fields. 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.

Built1953rebuilt 2003
Length686.0 ft209.1 m
Daily traffic45,176counted 2024
Last inspectedApril 2024every 24 months

Location

StatePennsylvania
CountyAllegheny
LocationFort Pitt Bridge
CarriesI-376 EB
CrossesMon River & Warf 376 WB
Coordinates40.43950, -80.00940

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length686.0 ft (209.1 m)
Max Span169.9 ft (51.8 m)
Deck Width34.4 ft (10.5 m)
Deck Area2195.6 sq m
Main Spans5
Year Built1953 (reconstructed 2003)

Traffic

Avg Daily Traffic45,176 (2024)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number000000000001116

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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