US Bridges

SR 0051 NB SB over Saw Mill Run

Fair

Allegheny County, Pennsylvania · Near Edgebrook Ave · Structure no. 000000000000739

Built
1941
84 years old, rebuilt 1992
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
40,495
2024 count
Owner
State
State Highway Agency

About this bridge

SR 0051 NB SB over Saw Mill Run is a steel stringer/multi-beam or girder carrying SR 0051 NB SB over Saw Mill Run in Allegheny County, Pennsylvania. It was built in 1941 and reconstructed in 1992, so it is 84 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 40,495 vehicles a day, roughly 10% of them trucks, projected to reach 53,908 by 2032. The structure is 50 ft (15.2 m) long and 72 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 0051 NB SB
CrossesSaw Mill Run
LocationNear Edgebrook Ave
RouteState Highway 51
CountyAllegheny County
StatePennsylvania
Coordinates40.40119, -80.00041
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span45 ft (13.7 m)
Deck width72 ft (21.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,495 (2024)
Projected traffic53,908 by 2032
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 SR 0051 NB SB over Saw Mill Run built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1992.

What condition is SR 0051 NB SB over Saw Mill 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 December 2023.

How much traffic does SR 0051 NB SB over Saw Mill Run carry?

About 40,495 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SR 0051 NB SB over Saw Mill Run?

The structure is 50 ft (15.2 m) long with a longest span of 45 ft (13.7 m) and a deck 72 ft wide.

Who owns SR 0051 NB SB over Saw Mill Run?

It is owned by the State Highway Agency.