US Bridges

Ramp S over Mcknight/Evergreen RD

Good

Allegheny County, Pennsylvania · Hov Mcknight Interchange · Structure no. 000000000002919

Built
1986
39 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
637 ft
7 main spans
Daily traffic
194
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp S over Mcknight/Evergreen RD is a steel continuous stringer/multi-beam or girder carrying Ramp S over Mcknight/Evergreen RD 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 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 194 vehicles a day, roughly 7% of them trucks, projected to reach 781 by 2032. The structure is 637 ft (194.2 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRamp S
CrossesMcknight/Evergreen RD
LocationHov Mcknight Interchange
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.5, -80
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.6 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length637 ft (194.2 m)
Longest span154 ft (46.9 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic194 (2024)
Projected traffic781 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 S over Mcknight/Evergreen RD built?

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

What condition is Ramp S over Mcknight/Evergreen RD 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 April 2024.

How much traffic does Ramp S over Mcknight/Evergreen RD carry?

About 194 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp S over Mcknight/Evergreen RD?

The structure is 637 ft (194.2 m) long with a longest span of 154 ft (46.9 m) and a deck 26 ft wide.

Who owns Ramp S over Mcknight/Evergreen RD?

It is owned by the State Highway Agency.