US Bridges

S-29-100 over Gills Creek

PoorPosted for load

Lancaster County, South Carolina · In Lancaster · Structure no. 000000000005331

Built
1968
57 years old
Condition
Poor
inspected June 2024
Type
Slab
Concrete
Length
75 ft
5 main spans
Daily traffic
1,150
2023 count
Owner
State
State Highway Agency

About this bridge

S-29-100 over Gills Creek is a concrete slab carrying S-29-100 over Gills Creek in Lancaster County, South Carolina. It was built in 1968, so it is 57 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 1,150 vehicles a day, roughly 2% of them trucks, projected to reach 1,622 by 2043. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-29-100
CrossesGills Creek
LocationIn Lancaster
RouteState Highway 100
Coordinates34.73213, -80.76888
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating30.3 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 10
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2023)
Projected traffic1,622 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$464,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-29-100 over Gills Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is S-29-100 over Gills 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-29-100 over Gills Creek carry?

About 1,150 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S-29-100 over Gills Creek?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-29-100 over Gills Creek?

It is owned by the State Highway Agency.