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Mill St over Bull Creek

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

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

Mill St over Bull Creek in Allegheny County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1989, making it 36 years old at the 2025 inventory.
It carries about 250 vehicles a day (traffic count year 2023).
Its listed owner is a town or township highway agency.
It is one of 120 of the 1,296 inventoried bridges in Allegheny County rated poor (9.3%); 120 (9.3%) 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


Structure	Prestressed concrete multiple box beam
Length	about 71 ft
Location	464001 Mill Street
NBI structure number	000000000002687
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Penn Linc Pw over Buswy Arch Bell Poc RR	1952	99,372	Fair
Penn Linc Pw over SR50 Wle RR Chartiers Ck	1950	99,372	Fair
Penn Lincoln Py over Campbells Run	1972	96,254	Fair
Parkway West over Campbells Run Road	1973	96,254	Good
SR 0279 NB SB over Suffolk St.	1987	88,452	Fair
Penn Lincoln Pw over Whiskey Run Bell Rd	1953	87,163	Fair