US Bridges

S-21-57 over Willow Creek

Fair

Florence County, South Carolina · 10 MI SE Florence · Structure no. 000000000003277

Built
1960
65 years old, rebuilt 2002
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
135 ft
9 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-57 over Willow Creek is a concrete slab carrying S-21-57 over Willow Creek in Florence County, South Carolina. It was built in 1960 and reconstructed in 2002, so it is 65 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 3,500 vehicles a day, roughly 14% of them trucks. The structure is 135 ft (41.1 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesS-21-57
CrossesWillow Creek
Location10 MI SE Florence
RouteState Highway 57
CountyFlorence County
StateSouth Carolina
Coordinates34.11074, -79.59438
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans9
Design loadH 10
Structure length135 ft (41.1 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic—
Trucks14%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$759,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-21-57 over Willow Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2002.

What condition is S-21-57 over Willow 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 April 2023.

How much traffic does S-21-57 over Willow Creek carry?

About 3,500 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is S-21-57 over Willow Creek?

The structure is 135 ft (41.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-21-57 over Willow Creek?

It is owned by the State Highway Agency.