US Bridges

SR 155-PA 155 over Allegheny River

Fair

McKean County, Pennsylvania · Port Allegany · Structure no. 000000000025306

Built
1953
72 years old, rebuilt 2016
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
330 ft
4 main spans
Daily traffic
889
2023 count
Owner
State
State Highway Agency

About this bridge

SR 155-PA 155 over Allegheny River is a steel continuous stringer/multi-beam or girder carrying SR 155-PA 155 over Allegheny River in McKean County, Pennsylvania. It was built in 1953 and reconstructed in 2016, so it is 72 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 5 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 889 vehicles a day, roughly 13% of them trucks, projected to reach 1,453 by 2044. The structure is 330 ft (100.6 m) long and 34 ft wide. If it were closed, the detour would be 41 mi (66 km).

Location

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CarriesSR 155-PA 155
CrossesAllegheny River
LocationPort Allegany
RouteState Highway 155
CountyMcKean County
StatePennsylvania
Coordinates41.80481, -78.27721
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length330 ft (100.6 m)
Longest span90 ft (27.4 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic889 (2023)
Projected traffic1,453 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 155-PA 155 over Allegheny River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2016.

What condition is SR 155-PA 155 over Allegheny River 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 August 2023.

How much traffic does SR 155-PA 155 over Allegheny River carry?

About 889 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SR 155-PA 155 over Allegheny River?

The structure is 330 ft (100.6 m) long with a longest span of 90 ft (27.4 m) and a deck 34 ft wide.

Who owns SR 155-PA 155 over Allegheny River?

It is owned by the State Highway Agency.