US Bridges

Pa Tpk Ramps B&c over Pa Tpk (I-76)

Fair

Westmoreland County, Pennsylvania · Irwin Interchange · Structure no. 000000000036824

Built
1952
73 years old, rebuilt 1988
Condition
Fair
inspected July 2024
Type
Girder and Floorbeam System
Steel
Length
112 ft
1 main span
Daily traffic
10,020
2008 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk Ramps B&c over Pa Tpk (I-76) is a steel girder and floorbeam system carrying Pa Tpk Ramps B&c over Pa Tpk (I-76) in Westmoreland County, Pennsylvania. It was built in 1952 and reconstructed in 1988, 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 10,020 vehicles a day, roughly 9% of them trucks, projected to reach 10,600 by 2030. The structure is 112 ft (34.1 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesPa Tpk Ramps B&c
CrossesPa Tpk (I-76)
LocationIrwin Interchange
Coordinates40.31667, -79.67333
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span108 ft (32.9 m)
Deck width42 ft (12.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,020 (2008)
Projected traffic10,600 by 2030
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk Ramps B&c over Pa Tpk (I-76) built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1988.

What condition is Pa Tpk Ramps B&c 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 July 2024.

How much traffic does Pa Tpk Ramps B&c over Pa Tpk (I-76) carry?

About 10,020 vehicles per day (2008 count), of which roughly 9% are trucks.

How long is Pa Tpk Ramps B&c over Pa Tpk (I-76)?

The structure is 112 ft (34.1 m) long with a longest span of 108 ft (32.9 m) and a deck 42 ft wide.

Who owns Pa Tpk Ramps B&c over Pa Tpk (I-76)?

It is owned by the State Toll Authority.