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T-583 Harrison Rd over Cowanesque River

Potter County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

T-583 Harrison Rd over Cowanesque River in Potter County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 0 (failed condition, out of service) on the 0-9 scale.
It was built in 1979 and reconstructed in 2007, making it 46 years old at the 2025 inventory.
It carries about 40 vehicles a day (traffic count year 2018).
Its listed owner is a town or township highway agency.
It is one of 25 of the 206 inventoried bridges in Potter County rated poor (12.1%); 25 (12.1%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Deck	5	Fair condition
Superstructure	4	Poor condition
Substructure	0	Failed condition, out of service


Structure	Steel stringer or multi-beam girder
Length	about 46 ft
Location	500 Ft NE of SR 49
NBI structure number	000000000030449
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.

Bridge	Built	Vehicles/day	Condition
SR 6-us 6 over Allegheny River	1949	7,298	Fair
SR 6-us 6 over Allegheny River	1934	6,354	Fair
SR 6 - US 6 over Allegheny River	2008	6,095	Good
Port Allegany Rd over Dingmans Run	2018	5,678	Good
SR 6-us 6 over North Hollow Run	1985	5,471	Fair
SR 6-us 6 over Lyman Creek	1962	5,471	Good