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S-31-220 over I-20

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

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

S-31-220 over I-20 in Lee 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 substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 200 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 47 of the 91 inventoried bridges in Lee County rated fair (51.6%); 2 (2.2%) 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


Structure	Steel stringer or multi-beam girder
Length	about 246 ft
Location	8 Mi W of Bishopville
NBI structure number	000000000006154
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-20 over Laws Branch	1972	29,500	Fair
I-20 over Mill Branch	1972	29,500	Fair
I-20 EB over Scape Ore Swamp	1971	15,350	Fair
I-20 EB over U.S. 15	1971	15,350	Good
I-20 WB over Scape Ore Swamp	1971	15,350	Fair
I-20 WB over US 15	1971	15,350	Good