US Bridges

I-81 Nb; SR 0081 over Twp RD 432

Fair

Dauphin County, Pennsylvania · 1 Mi. N. Progress · Structure no. 000000000014229

Built
1969
56 years old, rebuilt 2003
Condition
Fair
inspected November 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
40,290
2024 count
Owner
State
State Highway Agency

About this bridge

I-81 Nb; SR 0081 over Twp RD 432 is a prestressed concrete continuous box beam or girders - multiple carrying I-81 Nb; SR 0081 over Twp RD 432 in Dauphin County, Pennsylvania. It was built in 1969 and reconstructed in 2003, so it is 56 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 40,290 vehicles a day, roughly 17% of them trucks, projected to reach 46,197 by 2032. The structure is 108 ft (32.9 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-81 Nb; SR 0081
CrossesTwp RD 432
Location1 Mi. N. Progress
RouteInterstate 81
CountyDauphin County
StatePennsylvania
Coordinates40.31105, -76.83163
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
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 rating77.1 US tons
Inventory rating45 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span35 ft (10.7 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,290 (2024)
Projected traffic46,197 by 2032
Trucks17%
Lanes on structure2
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$852,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81 Nb; SR 0081 over Twp RD 432 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2003.

What condition is I-81 Nb; SR 0081 over Twp RD 432 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 November 2022.

How much traffic does I-81 Nb; SR 0081 over Twp RD 432 carry?

About 40,290 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is I-81 Nb; SR 0081 over Twp RD 432?

The structure is 108 ft (32.9 m) long with a longest span of 35 ft (10.7 m) and a deck 55 ft wide.

Who owns I-81 Nb; SR 0081 over Twp RD 432?

It is owned by the State Highway Agency.