US Bridges

US 321 over RR CSXT

Fair

Jasper County, South Carolina · In Hardeeville · Structure no. 000000000000735

Built
1936
89 years old, rebuilt 1973
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
156 ft
3 main spans
Daily traffic
4,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 321 over RR CSXT is a concrete tee beam carrying US 321 over RR CSXT in Jasper County, South Carolina. It was built in 1936 and reconstructed in 1973, so it is 89 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 4,600 vehicles a day, roughly 19% of them trucks, projected to reach 5,520 by 2043. The structure is 156 ft (47.5 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 321
CrossesRR CSXT
LocationIn Hardeeville
RouteU.S. Route 321
CountyJasper County
StateSouth Carolina
Coordinates32.28539, -81.08339
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length156 ft (47.5 m)
Longest span52 ft (15.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic5,520 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 321 over RR CSXT built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1973.

What condition is US 321 over RR CSXT 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 over RR CSXT carry?

About 4,600 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 321 over RR CSXT?

The structure is 156 ft (47.5 m) long with a longest span of 52 ft (15.8 m) and a deck 47 ft wide.

Who owns US 321 over RR CSXT?

It is owned by the State Highway Agency.