US Bridges

Ramp B over Ramp a

Fair

Allegheny County, Pennsylvania · I79 NB Ramp B to SR 65 · Structure no. 000000000002785

Built
1977
48 years old, rebuilt 2008
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
247 ft
4 main spans
Daily traffic
2,358
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp B over Ramp a is a steel continuous girder and floorbeam system carrying Ramp B over Ramp a in Allegheny County, Pennsylvania. It was built in 1977 and reconstructed in 2008, so it is 48 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 2,358 vehicles a day, roughly 7% of them trucks, projected to reach 3,877 by 2032. The structure is 247 ft (75.3 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesRamp B
CrossesRamp a
LocationI79 NB Ramp B to SR 65
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.52, -80.13333
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating67 US tons
Inventory rating51 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,358 (2024)
Projected traffic3,877 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$462,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp B over Ramp a built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2008.

What condition is Ramp B over Ramp a 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 May 2024.

How much traffic does Ramp B over Ramp a carry?

About 2,358 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp B over Ramp a?

The structure is 247 ft (75.3 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns Ramp B over Ramp a?

It is owned by the State Highway Agency.