US Bridges

S-9-21 over Bates Creek

Fair

Calhoun County, South Carolina · 5 NW ST Mathews · Structure no. 000000000000668

Built
1935
90 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

S-9-21 over Bates Creek is a concrete culvert carrying S-9-21 over Bates Creek in Calhoun County, South Carolina. It was built in 1935, so it is 90 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 550 vehicles a day, roughly 4% of them trucks, projected to reach 803 by 2043. The structure is 22 ft (6.6 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesS-9-21
CrossesBates Creek
Location5 NW ST Mathews
RouteState Highway 21
Coordinates33.71048, -80.81014
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.6 m)
Longest span10 ft (3 m)
Deck width34 ft (10.4 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic803 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-9-21 over Bates Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is S-9-21 over Bates 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 July 2023.

How much traffic does S-9-21 over Bates Creek carry?

About 550 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-9-21 over Bates Creek?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns S-9-21 over Bates Creek?

It is owned by the State Highway Agency.