US Bridges

S-29-471 over Gills Creek

Fair

Lancaster County, South Carolina · City of Lancaster · Structure no. 000000000006318

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
150 ft
10 main spans
Daily traffic
6,700
2023 count
Owner
State
State Highway Agency

About this bridge

S-29-471 over Gills Creek is a concrete slab carrying S-29-471 over Gills Creek in Lancaster County, South Carolina. It was built in 1973, so it is 52 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 6,700 vehicles a day, roughly 2% of them trucks, projected to reach 9,447 by 2043. The structure is 150 ft (45.7 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesS-29-471
CrossesGills Creek
LocationCity of Lancaster
RouteState Highway 471
CountyLancaster County
StateSouth Carolina
Coordinates34.73057, -80.7725
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans10
Design loadH 10
Structure length150 ft (45.7 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2023)
Projected traffic9,447 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-29-471 over Gills Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is S-29-471 over Gills 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-29-471 over Gills Creek carry?

About 6,700 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S-29-471 over Gills Creek?

The structure is 150 ft (45.7 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns S-29-471 over Gills Creek?

It is owned by the State Highway Agency.