US Bridges

T-647 Hagantown RD over Trib to Allegheny River

PoorPosted for load

Clarion County, Pennsylvania · 0.5 MI SW Int W/ SR 368 · Structure no. 000000000011158

Built
1920
105 years old, rebuilt 1988
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-647 Hagantown RD over Trib to Allegheny River is a steel stringer/multi-beam or girder carrying T-647 Hagantown RD over Trib to Allegheny River in Clarion County, Pennsylvania. It was built in 1920 and reconstructed in 1988, so it is 105 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 70 by 2044. The structure is 28 ft (8.5 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesT-647 Hagantown RD
CrossesTrib to Allegheny River
Location0.5 MI SW Int W/ SR 368
RouteCity Street 0
Coordinates41.0999, -79.65886
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29 US tons
Inventory rating17 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic70 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$281,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-647 Hagantown RD over Trib to Allegheny River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1988.

What condition is T-647 Hagantown RD over Trib to Allegheny River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does T-647 Hagantown RD over Trib to Allegheny River carry?

About 50 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is T-647 Hagantown RD over Trib to Allegheny River?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 19 ft wide.

Who owns T-647 Hagantown RD over Trib to Allegheny River?

It is owned by the Town or Township Highway Agency.