US Bridges

I-81 NB over Twp RD 351 Sunset Drive

Fair

Luzerne County, Pennsylvania · I-81 NB over Twp RD 351 · Structure no. 000000000023750

Built
1963
62 years old, rebuilt 2015
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
131 ft
3 main spans
Daily traffic
32,046
2024 count
Owner
State
State Highway Agency

About this bridge

I-81 NB over Twp RD 351 Sunset Drive is a prestressed concrete continuous box beam or girders - multiple carrying I-81 NB over Twp RD 351 Sunset Drive in Luzerne County, Pennsylvania. It was built in 1963 and reconstructed in 2015, 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 32,046 vehicles a day, roughly 20% of them trucks, projected to reach 35,716 by 2032. The structure is 131 ft (39.9 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-81 NB
CrossesTwp RD 351 Sunset Drive
LocationI-81 NB over Twp RD 351
RouteInterstate 81
CountyLuzerne County
StatePennsylvania
Coordinates41.27902, -75.79302
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 rating79.7 US tons
Inventory rating49.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length131 ft (39.9 m)
Longest span44 ft (13.4 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,046 (2024)
Projected traffic35,716 by 2032
Trucks20%
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$356,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-81 NB over Twp RD 351 Sunset Drive built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2015.

What condition is I-81 NB over Twp RD 351 Sunset Drive 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 September 2023.

How much traffic does I-81 NB over Twp RD 351 Sunset Drive carry?

About 32,046 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is I-81 NB over Twp RD 351 Sunset Drive?

The structure is 131 ft (39.9 m) long with a longest span of 44 ft (13.4 m) and a deck 59 ft wide.

Who owns I-81 NB over Twp RD 351 Sunset Drive?

It is owned by the State Highway Agency.