US Bridges

Bigelow Blvd over I-579

Good

Allegheny County, Pennsylvania · Bigelow Blvd over I-579 · Structure no. 000000000001236

Built
1962
63 years old, rebuilt 1987
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
265 ft
3 main spans
Daily traffic
4,011
2024 count
Owner
State
State Highway Agency

About this bridge

Bigelow Blvd over I-579 is a steel stringer/multi-beam or girder carrying Bigelow Blvd over I-579 in Allegheny County, Pennsylvania. It was built in 1962 and reconstructed in 1987, so it is 63 years old, older 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 4,011 vehicles a day, roughly 8% of them trucks, projected to reach 4,398 by 2032. The structure is 265 ft (80.8 m) long and 57 ft wide.

Location

Open in Google Maps
CarriesBigelow Blvd
CrossesI-579
LocationBigelow Blvd over I-579
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.44129, -79.99278
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length265 ft (80.8 m)
Longest span103 ft (31.4 m)
Deck width57 ft (17.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,011 (2024)
Projected traffic4,398 by 2032
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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$1.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Bigelow Blvd over I-579 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1987.

What condition is Bigelow Blvd over I-579 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 July 2022.

How much traffic does Bigelow Blvd over I-579 carry?

About 4,011 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Bigelow Blvd over I-579?

The structure is 265 ft (80.8 m) long with a longest span of 103 ft (31.4 m) and a deck 57 ft wide.

Who owns Bigelow Blvd over I-579?

It is owned by the State Highway Agency.