US Bridges

I-81; SR 0081 over Norfolk Southern T-310

Fair

Dauphin County, Pennsylvania · City of Harrisburg · Structure no. 000000000014219

Built
1972
53 years old, rebuilt 2003
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
720 ft
9 main spans
Daily traffic
67,324
2024 count
Owner
State
State Highway Agency

About this bridge

I-81; SR 0081 over Norfolk Southern T-310 is a prestressed concrete stringer/multi-beam or girder carrying I-81; SR 0081 over Norfolk Southern T-310 in Dauphin County, Pennsylvania. It was built in 1972 and reconstructed in 2003, so it is 53 years old, younger 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 67,324 vehicles a day, roughly 24% of them trucks, projected to reach 115,000 by 2032. The structure is 720 ft (219.5 m) long and 121 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-81; SR 0081
CrossesNorfolk Southern T-310
LocationCity of Harrisburg
RouteInterstate 81
CountyDauphin County
StatePennsylvania
Coordinates40.31013, -76.89443
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating17 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length720 ft (219.5 m)
Longest span93 ft (28.3 m)
Deck width121 ft (36.9 m)
Roadway width115 ft (35.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,324 (2024)
Projected traffic115,000 by 2032
Trucks24%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81; SR 0081 over Norfolk Southern T-310 built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2003.

What condition is I-81; SR 0081 over Norfolk Southern T-310 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 Norfolk Southern T-310 carry?

About 67,324 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is I-81; SR 0081 over Norfolk Southern T-310?

The structure is 720 ft (219.5 m) long with a longest span of 93 ft (28.3 m) and a deck 121 ft wide.

Who owns I-81; SR 0081 over Norfolk Southern T-310?

It is owned by the State Highway Agency.