US Bridges

Parkway West over Saw Mill Run

Fair

Allegheny County, Pennsylvania · 750 SW Ft Pitt Tunnels · Structure no. 000000000001006

Built
1952
73 years old, rebuilt 2015
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
47 ft
1 main span
Daily traffic
86,514
2024 count
Owner
State
State Highway Agency

About this bridge

Parkway West over Saw Mill Run is a concrete tee beam carrying Parkway West over Saw Mill Run in Allegheny County, Pennsylvania. It was built in 1952 and reconstructed in 2015, so it is 73 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 86,514 vehicles a day, roughly 6% of them trucks, projected to reach 82,034 by 2032. The structure is 47 ft (14.3 m) long and 100 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesParkway West
CrossesSaw Mill Run
Location750 SW Ft Pitt Tunnels
RouteInterstate 376
CountyAllegheny County
StatePennsylvania
Coordinates40.43054, -80.0267
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span43 ft (13.1 m)
Deck width100 ft (30.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,514 (2024)
Projected traffic82,034 by 2032
Trucks6%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Parkway West over Saw Mill Run built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2015.

What condition is Parkway West 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 July 2023.

How much traffic does Parkway West over Saw Mill Run carry?

About 86,514 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Parkway West over Saw Mill Run?

The structure is 47 ft (14.3 m) long with a longest span of 43 ft (13.1 m) and a deck 100 ft wide.

Who owns Parkway West over Saw Mill Run?

It is owned by the State Highway Agency.