US Bridges

Saw Mill Run Blvd over Weyman Run

Good

Allegheny County, Pennsylvania · 250 Southeast of SR 0088 · Structure no. 000000000052440

Built
2015
10 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
31,410
2024 count
Owner
State
State Highway Agency

About this bridge

Saw Mill Run Blvd over Weyman Run is a steel stringer/multi-beam or girder carrying Saw Mill Run Blvd over Weyman Run in Allegheny County, Pennsylvania. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 31,410 vehicles a day, roughly 6% of them trucks, projected to reach 93,000 by 2033. The structure is 40 ft (12.2 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSaw Mill Run Blvd
CrossesWeyman Run
Location250 Southeast of SR 0088
RouteState Highway 51
CountyAllegheny County
StatePennsylvania
Coordinates40.38141, -79.99546
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width53 ft (16.2 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,410 (2024)
Projected traffic93,000 by 2033
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Weyman Run built?

It was built in 2015, making it 10 years old in 2025.

What condition is Saw Mill Run Blvd over Weyman 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 Weyman Run carry?

About 31,410 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Saw Mill Run Blvd over Weyman Run?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 53 ft wide.

Who owns Saw Mill Run Blvd over Weyman Run?

It is owned by the State Highway Agency.