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US 301 over Maple Swamp

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

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

US 301 over Maple Swamp in Dillon 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 culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1967, making it 58 years old at the 2025 inventory.
It carries about 7,800 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 83 of the 129 inventoried bridges in Dillon County rated fair (64.3%); 14 (10.9%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 31 ft
Location	1.0MI SE of Dillon
NBI structure number	000000000005023
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-95 NB over Great Pee Dee Swamp	1966	23,150	Fair
I-95 SB over Great Pee Dee Swamp	1966	23,150	Fair
I-95 NB over Brownsville Creek & Frtg	1967	23,150	Fair
I-95 NB over Poccosin Swamp	1967	23,150	Fair
I-95 SB over Brownsville Creek & Frtg	1967	23,150	Fair
I-95 SB over Poccosin Swamp	1967	23,150	Fair