US Bridges

US 278 over Duck Creek

Fair

Allendale County, South Carolina · 3.5 MI SE Allendale · Structure no. 000000000000126

Built
1922
103 years old, rebuilt 1975
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
6,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 278 over Duck Creek is a concrete culvert carrying US 278 over Duck Creek in Allendale County, South Carolina. It was built in 1922 and reconstructed in 1975, 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 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 6,200 vehicles a day, roughly 12% of them trucks, projected to reach 9,858 by 2043. The structure is 21 ft (6.4 m) long and 83 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 278
CrossesDuck Creek
Location3.5 MI SE Allendale
RouteU.S. Route 278
CountyAllendale County
StateSouth Carolina
Coordinates32.97297, -81.25749
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 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 width83 ft (25.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2023)
Projected traffic9,858 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$69,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 278 over Duck Creek built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1975.

What condition is US 278 over Duck 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 August 2024.

How much traffic does US 278 over Duck Creek carry?

About 6,200 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 278 over Duck Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 83 ft wide.

Who owns US 278 over Duck Creek?

It is owned by the State Highway Agency.