US Bridges

Bigelow Blvd WB over I-579 NB SB Ramp B

Fair

Allegheny County, Pennsylvania · Crosstown Blvd · Structure no. 000000000001222

Built
1986
39 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,020 ft
5 main spans
Daily traffic
12,115
2024 count
Owner
State
State Highway Agency

About this bridge

Bigelow Blvd WB over I-579 NB SB Ramp B is a steel continuous stringer/multi-beam or girder carrying Bigelow Blvd WB over I-579 NB SB Ramp B in Allegheny County, Pennsylvania. It was built in 1986, so it is 39 years old, younger 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 6 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 12,115 vehicles a day, roughly 2% of them trucks, projected to reach 11,283 by 2032. The structure is 1,020 ft (310.9 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBigelow Blvd WB
CrossesI-579 NB SB Ramp B
LocationCrosstown Blvd
RouteState Highway 380
CountyAllegheny County
StatePennsylvania
Coordinates40.44303, -79.99273
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+3 approach)
Design loadHL 93
Structure length1,020 ft (310.9 m)
Longest span169 ft (51.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic12,115 (2024)
Projected traffic11,283 by 2032
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Bigelow Blvd WB over I-579 NB SB Ramp B built?

It was built in 1986, making it 39 years old in 2025.

What condition is Bigelow Blvd WB over I-579 NB SB Ramp B 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 2024.

How much traffic does Bigelow Blvd WB over I-579 NB SB Ramp B carry?

About 12,115 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Bigelow Blvd WB over I-579 NB SB Ramp B?

The structure is 1,020 ft (310.9 m) long with a longest span of 169 ft (51.5 m) and a deck 32 ft wide.

Who owns Bigelow Blvd WB over I-579 NB SB Ramp B?

It is owned by the State Highway Agency.