US Bridges

US 301 over North Edisto Swamp

Fair

Orangeburg County, South Carolina · 0.1 MI S of Orangeburg · Structure no. 000000000002066

Built
1954
71 years old, rebuilt 1968
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete
Length
84 ft
2 main spans
Daily traffic
28,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 over North Edisto Swamp is a concrete tee beam carrying US 301 over North Edisto Swamp in Orangeburg County, South Carolina. It was built in 1954 and reconstructed in 1968, so it is 71 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 5 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 28,600 vehicles a day, roughly 7% of them trucks, projected to reach 44,616 by 2043. The structure is 84 ft (25.6 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 301
CrossesNorth Edisto Swamp
Location0.1 MI S of Orangeburg
RouteU.S. Route 301
Coordinates33.48165, -80.87758
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36.4 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 20
Structure length84 ft (25.6 m)
Longest span27 ft (8.2 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,600 (2023)
Projected traffic44,616 by 2043
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 301 over North Edisto Swamp built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1968.

What condition is US 301 over North Edisto 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 December 2023.

How much traffic does US 301 over North Edisto Swamp carry?

About 28,600 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 301 over North Edisto Swamp?

The structure is 84 ft (25.6 m) long with a longest span of 27 ft (8.2 m) and a deck 76 ft wide.

Who owns US 301 over North Edisto Swamp?

It is owned by the State Highway Agency.