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S-43-40 over Mush Swamp

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

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

S-43-40 over Mush Swamp in Sumter 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 5 (fair condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 3,200 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 82 of the 166 inventoried bridges in Sumter County rated fair (49.4%); 17 (10.2%) 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

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

Bridge	Built	Vehicles/day	Condition
I-95 over Douglas Swamp	1967	33,700	Fair
I-95 over Hope Swamp	1967	33,200	Poor
I-95 over Pudding Swamp	1967	33,200	Fair
US 76 over Green Swamp	1941	30,400	Fair
US 76/US 378 over Long Branch	1941	26,400	Fair
US 521 over Shot Pouch Branch	1977	25,200	Fair