US Bridges

Pa Tpk (I-76) over Crab Run

Fair

Somerset County, Pennsylvania · East of Laurel Summit · Structure no. 000000000031792

Built
1939
86 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
31,991
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-76) over Crab Run is a concrete culvert carrying Pa Tpk (I-76) over Crab Run in Somerset County, Pennsylvania. It was built in 1939, so it is 86 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 31,991 vehicles a day, roughly 35% of them trucks, projected to reach 38,008 by 2030. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesPa Tpk (I-76)
CrossesCrab Run
LocationEast of Laurel Summit
RouteInterstate 76
CountySomerset County
StatePennsylvania
Coordinates40.072, -79.15991
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating98.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,991 (2004)
Projected traffic38,008 by 2030
Trucks35%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$284,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa Tpk (I-76) over Crab Run built?

It was built in 1939, making it 86 years old in 2025.

What condition is Pa Tpk (I-76) over Crab Run 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 2024.

How much traffic does Pa Tpk (I-76) over Crab Run carry?

About 31,991 vehicles per day (2004 count), of which roughly 35% are trucks.

How long is Pa Tpk (I-76) over Crab Run?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Pa Tpk (I-76) over Crab Run?

It is owned by the State Toll Authority.