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Sc 122 EB over US 21

York County, South Carolina · rated Fair in the 2025 National Bridge Inventory

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

Sc 122 EB over US 21 in York County, South Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1974, making it 51 years old at the 2025 inventory.
It carries about 13,300 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 146 of the 288 inventoried bridges in York County rated fair (50.7%); 22 (7.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 200 ft
Location	City of Rock Hill
NBI structure number	000000000006595
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-77 over Steel Creek	1973	130,800	Fair
I-77 over S-46-1441	1973	130,800	Fair
I-77 over S-46-100	1973	125,800	Fair
I-77 over Catawba River	1973	124,700	Fair
I-77 over US 21	1973	92,100	Fair
I-77 over Trib-catawba River	1975	92,100	Fair