US Bridges

Sc 20 over Calhoun Creek

Fair

Abbeville County, South Carolina · 2.6 MI N W of Abbeville · Structure no. 000000000000368

Built
1930
95 years old, rebuilt 1977
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
4,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 20 over Calhoun Creek is a concrete culvert carrying Sc 20 over Calhoun Creek in Abbeville County, South Carolina. It was built in 1930 and reconstructed in 1977, so it is 95 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 4,400 vehicles a day, roughly 7% of them trucks, projected to reach 6,996 by 2043. The structure is 34 ft (10.4 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSc 20
CrossesCalhoun Creek
Location2.6 MI N W of Abbeville
RouteState Highway 20
CountyAbbeville County
StateSouth Carolina
Coordinates34.21417, -82.3899
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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width48 ft (14.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2023)
Projected traffic6,996 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 20 over Calhoun Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1977.

What condition is Sc 20 over Calhoun 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 September 2023.

How much traffic does Sc 20 over Calhoun Creek carry?

About 4,400 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Sc 20 over Calhoun Creek?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 48 ft wide.

Who owns Sc 20 over Calhoun Creek?

It is owned by the State Highway Agency.