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S 27th Street over CSX Railroad Tunnel

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

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

S 27th Street over CSX Railroad Tunnel in Allegheny 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 2002, making it 23 years old at the 2025 inventory.
It carries about 1,500 vehicles a day (traffic count year 2023).
Its listed owner is a city or municipal highway agency.
It is one of 388 of the 1,296 inventoried bridges in Allegheny County rated good (29.9%); 120 (9.3%) 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	Prestressed concrete multiple box beam
Length	about 83 ft
Location	0.2 MI NW of Hot Metal Br
NBI structure number	000000000069447
Condition class	Good

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