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Ramp Off US 17 SB over Marsh & RR Csxt

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

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

Ramp Off US 17 SB over Marsh & RR Csxt 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 superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2005, making it 20 years old at the 2025 inventory.
It carries about 15,700 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 797 ft
Location	Charleston City Limits
NBI structure number	000000000009838
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