US Bridges

US321/DEERFIELD RD over Bagshaw Swamp

Good

Jasper County, South Carolina · 1.5MI S of Tillman · Structure no. 000000000000036

Built
1945
80 years old, rebuilt 1971
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

US321/DEERFIELD RD over Bagshaw Swamp is a concrete culvert carrying US321/DEERFIELD RD over Bagshaw Swamp in Jasper County, South Carolina. It was built in 1945 and reconstructed in 1971, so it is 80 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,300 vehicles a day, roughly 27% of them trucks, projected to reach 7,482 by 2043. The structure is 23 ft (7 m) long and 56 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS321/DEERFIELD RD
CrossesBagshaw Swamp
Location1.5MI S of Tillman
RouteU.S. Route 321
Coordinates32.44, -81.10444
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width56 ft (17.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic7,482 by 2043
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US321/DEERFIELD RD over Bagshaw Swamp built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1971.

What condition is US321/DEERFIELD RD over Bagshaw Swamp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does US321/DEERFIELD RD over Bagshaw Swamp carry?

About 4,300 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is US321/DEERFIELD RD over Bagshaw Swamp?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 56 ft wide.

Who owns US321/DEERFIELD RD over Bagshaw Swamp?

It is owned by the State Highway Agency.