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S-3-47 over Coosawhatchie River

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

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

S-3-47 over Coosawhatchie River in Allendale 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 2016, making it 9 years old at the 2025 inventory.
It carries about 225 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 15 of the 69 inventoried bridges in Allendale County rated good (21.7%); 9 (13.0%) 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 69 ft
Location	3MI S Allendale
NBI structure number	000000000002456
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 278 over Duck Creek	1922	6,200	Fair
US 278 over Southern Railroad	1961	3,500	Fair
US 301 over Salkehatchie River Swamp	1959	3,000	Fair
US 301 over Salkehatchie River Swamp	1959	3,000	Fair
US 301 over Salkehatchie River	1937	3,000	Fair
US 278 over Log Creek	1945	2,900	Fair