US Bridges

I-81;SR 0081 over Walnut Run

Fair

Dauphin County, Pennsylvania · Shellsville · Structure no. 000000000014245

Built
1967
58 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
57,540
2024 count
Owner
State
State Highway Agency

About this bridge

I-81;SR 0081 over Walnut Run is a concrete culvert carrying I-81;SR 0081 over Walnut Run in Dauphin County, Pennsylvania. It was built in 1967, 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 57,540 vehicles a day, roughly 36% of them trucks, projected to reach 78,967 by 2032. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-81;SR 0081
CrossesWalnut Run
LocationShellsville
RouteInterstate 81
CountyDauphin County
StatePennsylvania
Coordinates40.35866, -76.71198
Functional classUrban 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating51 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 traffic57,540 (2024)
Projected traffic78,967 by 2032
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-81;SR 0081 over Walnut Run built?

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

What condition is I-81;SR 0081 over Walnut 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 October 2022.

How much traffic does I-81;SR 0081 over Walnut Run carry?

About 57,540 vehicles per day (2024 count), of which roughly 36% are trucks.

How long is I-81;SR 0081 over Walnut Run?

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

Who owns I-81;SR 0081 over Walnut Run?

It is owned by the State Highway Agency.