US Bridges

Irishtown RD over Piney Fork Creek

Fair

Allegheny County, Pennsylvania · 280 South of SR 3004 · Structure no. 000000000001728

Built
1961
64 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
2,948
2024 count
Owner
State
State Highway Agency

About this bridge

Irishtown RD over Piney Fork Creek is a concrete slab carrying Irishtown RD over Piney Fork Creek in Allegheny County, Pennsylvania. It was built in 1961, so it is 64 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 2,948 vehicles a day, roughly 1% of them trucks, projected to reach 2,513 by 2032. The structure is 33 ft (10.1 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIrishtown RD
CrossesPiney Fork Creek
Location280 South of SR 3004
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.29766, -80.04656
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span28 ft (8.5 m)
Deck width36 ft (10.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,948 (2024)
Projected traffic2,513 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$49,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Irishtown RD over Piney Fork Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Irishtown RD over Piney Fork Creek 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 November 2023.

How much traffic does Irishtown RD over Piney Fork Creek carry?

About 2,948 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Irishtown RD over Piney Fork Creek?

The structure is 33 ft (10.1 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.

Who owns Irishtown RD over Piney Fork Creek?

It is owned by the State Highway Agency.