US Bridges

Allegheny River Bl over Plum Creek

Poor

Allegheny County, Pennsylvania · 500 South of SR 2080 · Structure no. 000000000001615

Built
1937
88 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
5,300
2024 count
Owner
State
State Highway Agency

About this bridge

Allegheny River Bl over Plum Creek is a steel stringer/multi-beam or girder carrying Allegheny River Bl over Plum Creek in Allegheny County, Pennsylvania. It was built in 1937, so it is 88 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,300 vehicles a day, roughly 3% of them trucks, projected to reach 15,932 by 2032. The structure is 45 ft (13.7 m) long and 58 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesAllegheny River Bl
CrossesPlum Creek
Location500 South of SR 2080
RouteState Highway 0
Coordinates40.51137, -79.84337
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating55 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span40 ft (12.2 m)
Deck width58 ft (17.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2024)
Projected traffic15,932 by 2032
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Allegheny River Bl over Plum Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Allegheny River Bl over Plum Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Allegheny River Bl over Plum Creek carry?

About 5,300 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Allegheny River Bl over Plum Creek?

The structure is 45 ft (13.7 m) long with a longest span of 40 ft (12.2 m) and a deck 58 ft wide.

Who owns Allegheny River Bl over Plum Creek?

It is owned by the State Highway Agency.