US Bridges

Ramp K Bigelow Bl over Ramp B Bigelow Blvd

Fair

Allegheny County, Pennsylvania · SR579 NB to Bigelow Blvd · Structure no. 000000000002887

Built
1986
39 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
190 ft
2 main spans
Daily traffic
5,886
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp K Bigelow Bl over Ramp B Bigelow Blvd is a steel continuous stringer/multi-beam or girder carrying Ramp K Bigelow Bl over Ramp B Bigelow Blvd 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 5,886 vehicles a day, roughly 2% of them trucks, projected to reach 22,999 by 2043. The structure is 190 ft (57.9 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRamp K Bigelow Bl
CrossesRamp B Bigelow Blvd
LocationSR579 NB to Bigelow Blvd
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.44463, -79.9901
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length190 ft (57.9 m)
Longest span100 ft (30.5 m)
Deck width19 ft (5.7 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,886 (2024)
Projected traffic22,999 by 2043
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Ramp K Bigelow Bl over Ramp B Bigelow Blvd built?

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

What condition is Ramp K Bigelow Bl over Ramp B Bigelow Blvd 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 April 2023.

How much traffic does Ramp K Bigelow Bl over Ramp B Bigelow Blvd carry?

About 5,886 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Ramp K Bigelow Bl over Ramp B Bigelow Blvd?

The structure is 190 ft (57.9 m) long with a longest span of 100 ft (30.5 m) and a deck 19 ft wide.

Who owns Ramp K Bigelow Bl over Ramp B Bigelow Blvd?

It is owned by the State Highway Agency.