US Bridges

US 1 over Twelvemile Creek No 2

Fair

Lexington County, South Carolina · Town of Lexington · Structure no. 000000000000355

Built
1929
96 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
29,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 1 over Twelvemile Creek No 2 is a concrete culvert carrying US 1 over Twelvemile Creek No 2 in Lexington County, South Carolina. It was built in 1929, so it is 96 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 29,500 vehicles a day, roughly 3% of them trucks, projected to reach 46,315 by 2043. The structure is 32 ft (9.8 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 1
CrossesTwelvemile Creek No 2
LocationTown of Lexington
RouteU.S. Route 1
CountyLexington County
StateSouth Carolina
Coordinates33.97727, -81.2279
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating62.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width50 ft (15.1 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,500 (2023)
Projected traffic46,315 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 US 1 over Twelvemile Creek No 2 built?

It was built in 1929, making it 96 years old in 2025.

What condition is US 1 over Twelvemile Creek No 2 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 2023.

How much traffic does US 1 over Twelvemile Creek No 2 carry?

About 29,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 1 over Twelvemile Creek No 2?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns US 1 over Twelvemile Creek No 2?

It is owned by the State Highway Agency.