US Bridges

US 501 over Tredwell Creek

Fair

Horry County, South Carolina · 2.7 MI N of Aynor · Structure no. 000000000001496

Built
1948
77 years old, rebuilt 1971
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
27,800
2023 count
Owner
State
State Highway Agency

About this bridge

US 501 over Tredwell Creek is a concrete continuous culvert carrying US 501 over Tredwell Creek in Horry County, South Carolina. It was built in 1948 and reconstructed in 1971, so it is 77 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 27,800 vehicles a day, roughly 8% of them trucks, projected to reach 48,372 by 2043. The structure is 32 ft (9.7 m) long and 130 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 501
CrossesTredwell Creek
Location2.7 MI N of Aynor
RouteU.S. Route 501
CountyHorry County
StateSouth Carolina
Coordinates34.03161, -79.22693
Functional classRural Principal Arterial - Other

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating25.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width130 ft (39.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,800 (2023)
Projected traffic48,372 by 2043
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$347,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 501 over Tredwell Creek built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1971.

What condition is US 501 over Tredwell 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 October 2024.

How much traffic does US 501 over Tredwell Creek carry?

About 27,800 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 501 over Tredwell Creek?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m) and a deck 130 ft wide.

Who owns US 501 over Tredwell Creek?

It is owned by the State Highway Agency.