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S-4-567 over Six & Twenty Creek

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

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

S-4-567 over Six & Twenty Creek in Anderson 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 substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 2,200 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 314 of the 462 inventoried bridges in Anderson County rated fair (68.0%); 19 (4.1%) 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 channel beam
Length	about 89 ft
Location	7.6MI NW Williamston
NBI structure number	000000000005661
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-85 over Big Beaver Dam Creek	1963	70,400	Fair
I-85 over County Road Under I-85	1963	70,200	Fair
I-85 over Six & Twenty Creek	2002	63,800	Fair
I-85 NB over Hurricane Creek	1962	54,300	Fair
I-85 NB over Steel Creek	1962	50,300	Fair
I-85 NB over Little Beaverdam Creek	1961	45,900	Fair