US Bridges

US 701 over White Oak Swamp

Fair

Horry County, South Carolina · 6.0MI S of Loris · Structure no. 000000000006694

Built
1975
50 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 701 over White Oak Swamp is a concrete slab carrying US 701 over White Oak Swamp in Horry County, South Carolina. It was built in 1975, so it is 50 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 7,500 vehicles a day, roughly 10% of them trucks, projected to reach 11,925 by 2043. The structure is 45 ft (13.7 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 701
CrossesWhite Oak Swamp
Location6.0MI S of Loris
RouteU.S. Route 701
CountyHorry County
StateSouth Carolina
Coordinates33.99815, -78.98124
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating24.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic11,925 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$183,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 701 over White Oak Swamp built?

It was built in 1975, making it 50 years old in 2025.

What condition is US 701 over White Oak 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 November 2024.

How much traffic does US 701 over White Oak Swamp carry?

About 7,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 701 over White Oak Swamp?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns US 701 over White Oak Swamp?

It is owned by the State Highway Agency.