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SR 322 Liberty St. over over Shenango River

Mercer County, Pennsylvania · rated Good in the 2025 National Bridge Inventory

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

SR 322 Liberty St. over over Shenango River in Mercer County, Pennsylvania, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1984, making it 41 years old at the 2025 inventory.
It carries about 1,902 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 179 of the 437 inventoried bridges in Mercer County rated good (41.0%); 65 (14.9%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 133 ft
Location	Jamestown Borough
NBI structure number	000000000025862
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
SR 80 Eb/wb & Ramp over Hogback Run	1966	26,925	Good
SR 79 Nb/sb over over Pine Run	1963	21,958	Fair
SR 80 EB over over SR 718 Sieg Hill Rd	1964	13,718	Fair
SR 80 EB over over Abandon RR &shngo R	1966	13,718	Fair
SR 80 EB over over SR 18 New Castle Rd	1993	13,718	Good
SR 60 Nb/sb Beaver over over Hogback Run	1966	13,476	Fair