US Bridges

Sc 4 over Rocky Swamp Creek

Fair

Orangeburg County, South Carolina · 8MI W of Neeses · Structure no. 000000000000137

Built
1922
103 years old, rebuilt 1937
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
1,750
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 4 over Rocky Swamp Creek is a concrete culvert carrying Sc 4 over Rocky Swamp Creek in Orangeburg County, South Carolina. It was built in 1922 and reconstructed in 1937, so it is 103 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 1,750 vehicles a day, roughly 15% of them trucks, projected to reach 2,783 by 2043. The structure is 21 ft (6.4 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSc 4
CrossesRocky Swamp Creek
Location8MI W of Neeses
RouteState Highway 4
CountyOrangeburg County
StateSouth Carolina
Coordinates33.51038, -81.18905
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,750 (2023)
Projected traffic2,783 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Sc 4 over Rocky Swamp Creek built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1937.

What condition is Sc 4 over Rocky Swamp Creek 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 February 2024.

How much traffic does Sc 4 over Rocky Swamp Creek carry?

About 1,750 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Sc 4 over Rocky Swamp Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 40 ft wide.

Who owns Sc 4 over Rocky Swamp Creek?

It is owned by the State Highway Agency.