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C-12-546 over Mountain Lakes

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

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

C-12-546 over Mountain Lakes in Chester 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 1960 and reconstructed in 1990, making it 65 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 103 of the 191 inventoried bridges in Chester County rated fair (53.9%); 20 (10.5%) 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	Prestressed concrete stringer or multi-beam girder
Length	about 60 ft
Location	4 Mi SW Chester
NBI structure number	000000000003222
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 NB over Scl Railroad	1978	28,150	Fair
I-77 SB over Scl Railroad	1978	28,150	Fair
I-77 NB over S. Fork Fishing Ck	1979	28,150	Fair
I-77 Nbl over Fishing Creek	1979	28,150	Fair
I-77 SB over S. Fork Fishing Ck	1979	28,150	Fair
I-77 Sbl over Fishing Creek	1979	28,150	Fair