US Bridges

US 701 over Halfway Swamp

Fair

Horry County, South Carolina · 5.5MI SE of Conway · Structure no. 000000000000547

Built
1931
94 years old, rebuilt 1958
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
8,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 701 over Halfway Swamp is a concrete culvert carrying US 701 over Halfway Swamp in Horry County, South Carolina. It was built in 1931 and reconstructed in 1958, so it is 94 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 8,200 vehicles a day, roughly 14% of them trucks, projected to reach 8,282 by 2043. The structure is 27 ft (8.1 m) long and 58 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesUS 701
CrossesHalfway Swamp
Location5.5MI SE of Conway
RouteU.S. Route 701
CountyHorry County
StateSouth Carolina
Coordinates33.75009, -79.07781
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating22.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length27 ft (8.1 m)
Longest span12 ft (3.7 m)
Deck width58 ft (17.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2023)
Projected traffic8,282 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$171,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 701 over Halfway Swamp built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1958.

What condition is US 701 over Halfway 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 June 2023.

How much traffic does US 701 over Halfway Swamp carry?

About 8,200 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 701 over Halfway Swamp?

The structure is 27 ft (8.1 m) long with a longest span of 12 ft (3.7 m) and a deck 58 ft wide.

Who owns US 701 over Halfway Swamp?

It is owned by the State Highway Agency.