US Bridges

I-81 Nb; SR 0081 over T-480; Shagbark LN

Fair

Cumberland County, Pennsylvania · 3 Mi.S. of Carlisle · Structure no. 000000000013661

Built
1963
62 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
20,917
2024 count
Owner
State
State Highway Agency

About this bridge

I-81 Nb; SR 0081 over T-480; Shagbark LN is a prestressed concrete box beam or girders - multiple carrying I-81 Nb; SR 0081 over T-480; Shagbark LN in Cumberland County, Pennsylvania. It was built in 1963, 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 20,917 vehicles a day, roughly 36% of them trucks, projected to reach 28,129 by 2032. The structure is 36 ft (11 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-81 Nb; SR 0081
CrossesT-480; Shagbark LN
Location3 Mi.S. of Carlisle
RouteInterstate 81
CountyCumberland County
StatePennsylvania
Coordinates40.17512, -77.25672
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.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width46 ft (13.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,917 (2024)
Projected traffic28,129 by 2032
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 Nb; SR 0081 over T-480; Shagbark LN built?

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

What condition is I-81 Nb; SR 0081 over T-480; Shagbark LN 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 Nb; SR 0081 over T-480; Shagbark LN carry?

About 20,917 vehicles per day (2024 count), of which roughly 36% are trucks.

How long is I-81 Nb; SR 0081 over T-480; Shagbark LN?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 46 ft wide.

Who owns I-81 Nb; SR 0081 over T-480; Shagbark LN?

It is owned by the State Highway Agency.