US Bridges

Saw Mill Run Blvd over Saw Mill Run

Good

Allegheny County, Pennsylvania · At Warrington Ave · Structure no. 000000000040480

Built
1999
26 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
58 ft
2 main spans
Daily traffic
41,549
2024 count
Owner
State
State Highway Agency

About this bridge

Saw Mill Run Blvd over Saw Mill Run is a concrete culvert carrying Saw Mill Run Blvd over Saw Mill Run in Allegheny County, Pennsylvania. It was built in 1999, so it is 26 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 41,549 vehicles a day, roughly 7% of them trucks, projected to reach 55,235 by 2032. The structure is 58 ft (17.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSaw Mill Run Blvd
CrossesSaw Mill Run
LocationAt Warrington Ave
RouteState Highway 51
Coordinates40.41496, -80.01077
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span58 ft (17.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,549 (2024)
Projected traffic55,235 by 2032
Trucks7%
Lanes on structure6
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 Saw Mill Run Blvd over Saw Mill Run built?

It was built in 1999, making it 26 years old in 2025.

What condition is Saw Mill Run Blvd over Saw Mill Run 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 December 2023.

How much traffic does Saw Mill Run Blvd over Saw Mill Run carry?

About 41,549 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Saw Mill Run Blvd over Saw Mill Run?

The structure is 58 ft (17.7 m) long with a longest span of 58 ft (17.7 m).

Who owns Saw Mill Run Blvd over Saw Mill Run?

It is owned by the State Highway Agency.