US Bridges

S. Linden St. over N-S RR

Good

Allegheny County, Pennsylvania · FO02 Duquesne Flyover · Structure no. 000000000045729

Built
2009
16 years old
Condition
Good
inspected October 2023
Type
Girder and Floorbeam System
Steel
Length
86 ft
1 main span
Daily traffic
434
2011 count
Owner
County
County Highway Agency

About this bridge

S. Linden St. over N-S RR is a steel girder and floorbeam system carrying S. Linden St. over N-S RR in Allegheny County, Pennsylvania. It was built in 2009, so it is 16 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 434 vehicles a day, roughly 1% of them trucks, projected to reach 474 by 2030. The structure is 86 ft (26.2 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesS. Linden St.
CrossesN-S RR
LocationFO02 Duquesne Flyover
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.36366, -79.84221
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span81 ft (24.7 m)
Deck width61 ft (18.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic434 (2011)
Projected traffic474 by 2030
Trucks1%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S. Linden St. over N-S RR built?

It was built in 2009, making it 16 years old in 2025.

What condition is S. Linden St. over N-S RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does S. Linden St. over N-S RR carry?

About 434 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is S. Linden St. over N-S RR?

The structure is 86 ft (26.2 m) long with a longest span of 81 ft (24.7 m) and a deck 61 ft wide.

Who owns S. Linden St. over N-S RR?

It is owned by the County Highway Agency.