US Bridges

40th Street Bridge over Nsrc CSX Avr

Fair

Allegheny County, Pennsylvania · 40th Street Bridge · Structure no. 000000000001674

Built
1924
101 years old, rebuilt 1991
Condition
Fair
inspected May 2023
Type
Arch - Deck
Steel
Length
2,432 ft
3 main spans
Daily traffic
26,091
2024 count
Owner
State
State Highway Agency

About this bridge

40th Street Bridge over Nsrc CSX Avr is a steel arch - deck carrying 40th Street Bridge over Nsrc CSX Avr in Allegheny County, Pennsylvania. It was built in 1924 and reconstructed in 1991, so it is 101 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 26,091 vehicles a day, roughly 4% of them trucks, projected to reach 32,495 by 2043. The structure is 2,432 ft (741.3 m) long and 54 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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Carries40th Street Bridge
CrossesNsrc CSX Avr
Location40th Street Bridge
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.47236, -79.96786
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+13 approach)
Design loadHS 20
Structure length2,432 ft (741.3 m)
Longest span380 ft (115.8 m)
Deck width54 ft (16.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic26,091 (2024)
Projected traffic32,495 by 2043
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$18.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was 40th Street Bridge over Nsrc CSX Avr built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1991.

What condition is 40th Street Bridge over Nsrc CSX Avr in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does 40th Street Bridge over Nsrc CSX Avr carry?

About 26,091 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is 40th Street Bridge over Nsrc CSX Avr?

The structure is 2,432 ft (741.3 m) long with a longest span of 380 ft (115.8 m) and a deck 54 ft wide.

Who owns 40th Street Bridge over Nsrc CSX Avr?

It is owned by the State Highway Agency.