US Bridges

Smithfield Street over Monongahela River CSX RR

FairPosted for load

Allegheny County, Pennsylvania · Smithfield Street Bridge · Structure no. 000000000001742

Built
1883
142 years old, rebuilt 2024
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
1,182 ft
2 main spans
Daily traffic
7,417
2024 count
Owner
State
State Highway Agency

About this bridge

Smithfield Street over Monongahela River CSX RR is a steel truss - thru carrying Smithfield Street over Monongahela River CSX RR in Allegheny County, Pennsylvania. It was built in 1883 and reconstructed in 2024, so it is 142 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. Its operating status is: posted for load restriction.

It carries about 7,417 vehicles a day, roughly 14% of them trucks, projected to reach 16,016 by 2032. The structure is 1,182 ft (360.3 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSmithfield Street
CrossesMonongahela River CSX RR
LocationSmithfield Street Bridge
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.43475, -80.00213
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+5 approach)
Design loadHS 20
Structure length1,182 ft (360.3 m)
Longest span360 ft (109.7 m)
Deck width46 ft (14.1 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic7,417 (2024)
Projected traffic16,016 by 2032
Trucks14%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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$6.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Smithfield Street over Monongahela River CSX RR built?

It was built in 1883, making it 142 years old in 2025. It was reconstructed in 2024.

What condition is Smithfield Street over Monongahela River CSX RR 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 July 2023.

How much traffic does Smithfield Street over Monongahela River CSX RR carry?

About 7,417 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Smithfield Street over Monongahela River CSX RR?

The structure is 1,182 ft (360.3 m) long with a longest span of 360 ft (109.7 m) and a deck 46 ft wide.

Who owns Smithfield Street over Monongahela River CSX RR?

It is owned by the State Highway Agency.