US Bridges

T-561 over Pa Tpk (I-76)

Fair

Beaver County, Pennsylvania · East of Unionville · Structure no. 000000000003830

Built
1952
73 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
141 ft
3 main spans
Daily traffic
200
1992 count
Owner
Toll Authority
State Toll Authority

About this bridge

T-561 over Pa Tpk (I-76) is a steel continuous stringer/multi-beam or girder carrying T-561 over Pa Tpk (I-76) in Beaver County, Pennsylvania. It was built in 1952, 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 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 200 vehicles a day, roughly 7% of them trucks, projected to reach 315 by 2030. The structure is 141 ft (43 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesT-561
CrossesPa Tpk (I-76)
LocationEast of Unionville
RouteCity Street 0T561
CountyBeaver County
StatePennsylvania
Coordinates40.745, -80.2
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span86 ft (26.2 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (1992)
Projected traffic315 by 2030
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$766,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was T-561 over Pa Tpk (I-76) built?

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

What condition is T-561 over Pa Tpk (I-76) 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 April 2024.

How much traffic does T-561 over Pa Tpk (I-76) carry?

About 200 vehicles per day (1992 count), of which roughly 7% are trucks.

How long is T-561 over Pa Tpk (I-76)?

The structure is 141 ft (43 m) long with a longest span of 86 ft (26.2 m) and a deck 27 ft wide.

Who owns T-561 over Pa Tpk (I-76)?

It is owned by the State Toll Authority.