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S-20-12 over Rocky Creek

Fairfield County, South Carolina · rated Good in the 2025 National Bridge Inventory

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

S-20-12 over Rocky Creek in Fairfield County, South Carolina, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 1989, making it 36 years old at the 2025 inventory.
It carries about 425 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 49 of the 139 inventoried bridges in Fairfield County rated good (35.3%); 8 (5.8%) 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

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

Bridge	Built	Vehicles/day	Condition
I-77 over Center Creek	1978	53,600	Good
I-77 over Big Cedar Creek	1978	53,600	Fair
I-77 over Dutchmans Creek	1978	48,900	Fair
I-77 NB over Sc 34	1978	24,450	Good
I-77 SB over Sc 34	1978	24,450	Good
I-77 Nbl over Big Wateree Ck	1979	24,300	Fair