US Bridges

SR 0081 I-81 SB over Trowbridge Creek

Fair

Susquehanna County, Pennsylvania · Great Bend Twp 1M S Pa LN · Structure no. 000000000032216

Built
1961
64 years old, rebuilt 1999
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
9,450
2023 count
Owner
State
State Highway Agency

About this bridge

SR 0081 I-81 SB over Trowbridge Creek is a prestressed concrete box beam or girders - multiple carrying SR 0081 I-81 SB over Trowbridge Creek in Susquehanna County, Pennsylvania. It was built in 1961 and reconstructed in 1999, so it is 64 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 9,450 vehicles a day, roughly 31% of them trucks, projected to reach 12,668 by 2032. The structure is 81 ft (24.7 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 0081 I-81 SB
CrossesTrowbridge Creek
LocationGreat Bend Twp 1M S Pa LN
RouteInterstate 81
CountySusquehanna County
StatePennsylvania
Coordinates41.98313, -75.74673
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating60 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length81 ft (24.7 m)
Longest span79 ft (24.1 m)
Deck width57 ft (17.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,450 (2023)
Projected traffic12,668 by 2032
Trucks31%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 byPrivate (other than railroad)
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 SR 0081 I-81 SB over Trowbridge Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1999.

What condition is SR 0081 I-81 SB over Trowbridge Creek 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 June 2024.

How much traffic does SR 0081 I-81 SB over Trowbridge Creek carry?

About 9,450 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is SR 0081 I-81 SB over Trowbridge Creek?

The structure is 81 ft (24.7 m) long with a longest span of 79 ft (24.1 m) and a deck 57 ft wide.

Who owns SR 0081 I-81 SB over Trowbridge Creek?

It is owned by the State Highway Agency and maintained by the Private (other than railroad).