US Bridges

Ramp W over Over S.B. (I-79)

Good

Allegheny County, Pennsylvania · Ramp W over I79 S.B. · Structure no. 000000000002796

Built
1975
50 years old, rebuilt 2012
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
247 ft
1 main span
Daily traffic
5,055
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp W over Over S.B. (I-79) is a steel stringer/multi-beam or girder carrying Ramp W over Over S.B. (I-79) in Allegheny County, Pennsylvania. It was built in 1975 and reconstructed in 2012, so it is 50 years old, younger 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 5,055 vehicles a day, roughly 7% of them trucks, projected to reach 7,325 by 2032. The structure is 247 ft (75.3 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesRamp W
CrossesOver S.B. (I-79)
LocationRamp W over I79 S.B.
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.66333, -80.095
Functional classUrban Principal Arterial - Interstate

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 inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span118 ft (36 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,055 (2024)
Projected traffic7,325 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$210,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp W over Over S.B. (I-79) built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2012.

What condition is Ramp W over Over S.B. (I-79) 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 September 2024.

How much traffic does Ramp W over Over S.B. (I-79) carry?

About 5,055 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp W over Over S.B. (I-79)?

The structure is 247 ft (75.3 m) long with a longest span of 118 ft (36 m) and a deck 44 ft wide.

Who owns Ramp W over Over S.B. (I-79)?

It is owned by the State Highway Agency.