US Bridges

Plain Grove N Lib over Interstate 79

Fair

Lawrence County, Pennsylvania · 2.7 MI N of PA-108 · Structure no. 000000000022387

Built
1963
62 years old, rebuilt 2008
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
235 ft
5 main spans
Daily traffic
319
2023 count
Owner
State
State Highway Agency

About this bridge

Plain Grove N Lib over Interstate 79 is a prestressed concrete box beam or girders - multiple carrying Plain Grove N Lib over Interstate 79 in Lawrence County, Pennsylvania. It was built in 1963 and reconstructed in 2008, so it is 62 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 319 vehicles a day, roughly 9% of them trucks, projected to reach 298 by 2032. The structure is 235 ft (71.6 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesPlain Grove N Lib
CrossesInterstate 79
Location2.7 MI N of PA-108
RouteState Highway 0
CountyLawrence County
StatePennsylvania
Coordinates41.07452, -80.1281
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating40 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span59 ft (18 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic319 (2023)
Projected traffic298 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.9 mi (24 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$581,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Plain Grove N Lib over Interstate 79 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2008.

What condition is Plain Grove N Lib over Interstate 79 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 Plain Grove N Lib over Interstate 79 carry?

About 319 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Plain Grove N Lib over Interstate 79?

The structure is 235 ft (71.6 m) long with a longest span of 59 ft (18 m) and a deck 34 ft wide.

Who owns Plain Grove N Lib over Interstate 79?

It is owned by the State Highway Agency.