US Bridges

S-11-21 over Ponders Creek

Good

Cherokee County, South Carolina · 4.3 MI NE Blacksburg · Structure no. 000000000000720

Built
1942
83 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
700
2023 count
Owner
State
State Highway Agency

About this bridge

S-11-21 over Ponders Creek is a concrete culvert carrying S-11-21 over Ponders Creek in Cherokee County, South Carolina. It was built in 1942, so it is 83 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 700 vehicles a day, roughly 18% of them trucks, projected to reach 1,022 by 2025. The structure is 31 ft (9.4 m) long and 60 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesS-11-21
CrossesPonders Creek
Location4.3 MI NE Blacksburg
RouteState Highway 21
Coordinates35.14389, -81.44389
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width60 ft (18.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2023)
Projected traffic1,022 by 2025
Trucks18%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-11-21 over Ponders Creek built?

It was built in 1942, making it 83 years old in 2025.

What condition is S-11-21 over Ponders Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does S-11-21 over Ponders Creek carry?

About 700 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is S-11-21 over Ponders Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m) and a deck 60 ft wide.

Who owns S-11-21 over Ponders Creek?

It is owned by the State Highway Agency.