US Bridges

S-32-68 over Twelve Mile Creek

Fair

Lexington County, South Carolina · 4 MI S Irmo · Structure no. 000000000001631

Built
1949
76 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
13,600
2023 count
Owner
State
State Highway Agency

About this bridge

S-32-68 over Twelve Mile Creek is a steel stringer/multi-beam or girder carrying S-32-68 over Twelve Mile Creek in Lexington County, South Carolina. It was built in 1949, so it is 76 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 13,600 vehicles a day, roughly 3% of them trucks, projected to reach 17,952 by 2043. The structure is 52 ft (15.8 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS-32-68
CrossesTwelve Mile Creek
Location4 MI S Irmo
RouteState Highway 68
Coordinates34.03112, -81.16179
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length52 ft (15.8 m)
Longest span52 ft (15.8 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2023)
Projected traffic17,952 by 2043
Trucks3%
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$260,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-32-68 over Twelve Mile Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is S-32-68 over Twelve Mile 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 S-32-68 over Twelve Mile Creek carry?

About 13,600 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-32-68 over Twelve Mile Creek?

The structure is 52 ft (15.8 m) long with a longest span of 52 ft (15.8 m) and a deck 26 ft wide.

Who owns S-32-68 over Twelve Mile Creek?

It is owned by the State Highway Agency.