US Bridges

US 321/DEERFIELDRD over Brickyard Swamp

Fair

Jasper County, South Carolina · 2MI N of Hardeeville · Structure no. 000000000000033

Built
1940
85 years old, rebuilt 1971
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
3,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 321/DEERFIELDRD over Brickyard Swamp is a concrete culvert carrying US 321/DEERFIELDRD over Brickyard Swamp in Jasper County, South Carolina. It was built in 1940 and reconstructed in 1971, so it is 85 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,900 vehicles a day, roughly 18% of them trucks, projected to reach 4,680 by 2043. The structure is 34 ft (10.4 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 321/DEERFIELDRD
CrossesBrickyard Swamp
Location2MI N of Hardeeville
RouteU.S. Route 321
Coordinates32.32111, -81.08917
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width59 ft (18 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2023)
Projected traffic4,680 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 321/DEERFIELDRD over Brickyard Swamp built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1971.

What condition is US 321/DEERFIELDRD over Brickyard Swamp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does US 321/DEERFIELDRD over Brickyard Swamp carry?

About 3,900 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 321/DEERFIELDRD over Brickyard Swamp?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 59 ft wide.

Who owns US 321/DEERFIELDRD over Brickyard Swamp?

It is owned by the State Highway Agency.