Structure 1028 · Allegheny County, PA

SR 0279 NB over SR 0279sb

Carries SR 0279 NB over SR 0279sb, Fort Duquesne Bridge.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT899 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

899 ft end to end, longest span 140 ft: about 2.5 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 box-beam bridge.

Built198541 years old
Length899.0 ft274 m
Daily traffic10,891counted 2024
Last inspectedJuly 2023every 24 months

Location

StatePennsylvania
CountyAllegheny
LocationFort Duquesne Bridge
CarriesSR 0279 NB
CrossesSR 0279sb
Coordinates40.44648, -80.00953

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Multiple
Total Length899.0 ft (274 m)
Max Span140.1 ft (42.7 m)
Deck Width42.0 ft (12.8 m)
Deck Area3507.2 sq m
Main Spans8
Year Built1985

Traffic

Avg Daily Traffic10,891 (2024)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000001028

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.

Nearby Bridges