US Bridges

I-81 Sb; SR 0081 over SR 4020

Fair

Lebanon County, Pennsylvania · Exit 85 I-81 · Structure no. 000000000022646

Built
1967
58 years old, rebuilt 1995
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
176 ft
4 main spans
Daily traffic
27,367
2024 count
Owner
State
State Highway Agency

About this bridge

I-81 Sb; SR 0081 over SR 4020 is a prestressed concrete box beam or girders - multiple carrying I-81 Sb; SR 0081 over SR 4020 in Lebanon County, Pennsylvania. It was built in 1967 and reconstructed in 1995, so it is 58 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 27,367 vehicles a day, roughly 46% of them trucks, projected to reach 31,697 by 2035. The structure is 176 ft (53.6 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-81 Sb; SR 0081
CrossesSR 4020
LocationExit 85 I-81
RouteInterstate 81
CountyLebanon County
StatePennsylvania
Coordinates40.41421, -76.58145
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length176 ft (53.6 m)
Longest span57 ft (17.4 m)
Deck width70 ft (21.2 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,367 (2024)
Projected traffic31,697 by 2035
Trucks46%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 I-81 Sb; SR 0081 over SR 4020 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1995.

What condition is I-81 Sb; SR 0081 over SR 4020 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 December 2023.

How much traffic does I-81 Sb; SR 0081 over SR 4020 carry?

About 27,367 vehicles per day (2024 count), of which roughly 46% are trucks.

How long is I-81 Sb; SR 0081 over SR 4020?

The structure is 176 ft (53.6 m) long with a longest span of 57 ft (17.4 m) and a deck 70 ft wide.

Who owns I-81 Sb; SR 0081 over SR 4020?

It is owned by the State Highway Agency.