US Bridges

I-376 over CSX RR Swineburn Frazier

Fair

Allegheny County, Pennsylvania · Frazier Street Bridge · Structure no. 000000000001157

Built
1951
74 years old, rebuilt 1981
Condition
Fair
inspected August 2023
Type
Truss - Deck
Steel Continuous
Length
1,015 ft
4 main spans
Daily traffic
85,678
2024 count
Owner
State
State Highway Agency

About this bridge

I-376 over CSX RR Swineburn Frazier is a steel continuous truss - deck carrying I-376 over CSX RR Swineburn Frazier in Allegheny County, Pennsylvania. It was built in 1951 and reconstructed in 1981, so it is 74 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 85,678 vehicles a day, roughly 6% of them trucks, projected to reach 68,855 by 2032. The structure is 1,015 ft (309.4 m) long and 99 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-376
CrossesCSX RR Swineburn Frazier
LocationFrazier Street Bridge
RouteInterstate 376
CountyAllegheny County
StatePennsylvania
Coordinates40.42742, -79.95336
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating24 US tons

Structure

Structure typeTruss - Deck
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length1,015 ft (309.4 m)
Longest span264 ft (80.5 m)
Deck width99 ft (30.3 m)
Roadway width93 ft (28.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,678 (2024)
Projected traffic68,855 by 2032
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-376 over CSX RR Swineburn Frazier built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1981.

What condition is I-376 over CSX RR Swineburn Frazier 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 August 2023.

How much traffic does I-376 over CSX RR Swineburn Frazier carry?

About 85,678 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is I-376 over CSX RR Swineburn Frazier?

The structure is 1,015 ft (309.4 m) long with a longest span of 264 ft (80.5 m) and a deck 99 ft wide.

Who owns I-376 over CSX RR Swineburn Frazier?

It is owned by the State Highway Agency.