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US 78 over Popperdam Creek

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

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

US 78 over Popperdam Creek in Charleston 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 2001, making it 24 years old at the 2025 inventory.
It carries about 46,700 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 189 of the 339 inventoried bridges in Charleston County rated fair (55.8%); 9 (2.7%) 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 tee beam
Length	about 57 ft
Location	1.0 Mi SE Ladson
NBI structure number	000000000006052
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-26 over RR NS Spur & Taylor St	1964	170,100	Fair
I-26 over Goose Creek	1960	109,600	Fair
I-26 over RR Csxt	1963	94,100	Poor
US 17 over RR Csxt & US 52 Bus	2005	94,100	Fair
US 17 over Marsh	2005	94,100	Good
US 17 over Cooper River Town Creek	2005	94,100	Good