US Bridges

S-29-55 over Twelve Mile Creek

PoorPosted for load

Lancaster County, South Carolina · Town of Van Wyck · Structure no. 000000000000879

Built
1938
87 years old
Condition
Poor
inspected June 2024
Type
Tee Beam
Concrete
Length
150 ft
5 main spans
Daily traffic
2,800
2023 count
Owner
State
State Highway Agency

About this bridge

S-29-55 over Twelve Mile Creek is a concrete tee beam carrying S-29-55 over Twelve Mile Creek in Lancaster County, South Carolina. It was built in 1938, so it is 87 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 2,800 vehicles a day, roughly 7% of them trucks, projected to reach 5,908 by 2043. The structure is 150 ft (45.7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-29-55
CrossesTwelve Mile Creek
LocationTown of Van Wyck
RouteState Highway 55
Coordinates34.85951, -80.85205
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating23.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 10
Structure length150 ft (45.7 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2023)
Projected traffic5,908 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$831,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-29-55 over Twelve Mile Creek built?

It was built in 1938, making it 87 years old in 2025.

What condition is S-29-55 over Twelve Mile Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does S-29-55 over Twelve Mile Creek carry?

About 2,800 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is S-29-55 over Twelve Mile Creek?

The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns S-29-55 over Twelve Mile Creek?

It is owned by the State Highway Agency.