US Bridges

Mcknight RD over Mcknight Run

Fair

Allegheny County, Pennsylvania · @ Inter.W/Braunlich Dr. · Structure no. 000000000001910

Built
1946
79 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
46,766
2024 count
Owner
State
State Highway Agency

About this bridge

Mcknight RD over Mcknight Run is a concrete culvert carrying Mcknight RD over Mcknight Run in Allegheny County, Pennsylvania. It was built in 1946, so it is 79 years old, older 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 46,766 vehicles a day, roughly 2% of them trucks, projected to reach 44,434 by 2032. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMcknight RD
CrossesMcknight Run
Location@ Inter.W/Braunlich Dr.
RouteU.S. Route 19T
CountyAllegheny County
StatePennsylvania
Coordinates40.52947, -80.00879
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating84 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,766 (2024)
Projected traffic44,434 by 2032
Trucks2%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcknight RD over Mcknight Run built?

It was built in 1946, making it 79 years old in 2025.

What condition is Mcknight RD over Mcknight Run 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 February 2023.

How much traffic does Mcknight RD over Mcknight Run carry?

About 46,766 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Mcknight RD over Mcknight Run?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m).

Who owns Mcknight RD over Mcknight Run?

It is owned by the State Highway Agency.