US Bridges

S-40-1021 over Trib to Gills Creek

FairPosted for load

Richland County, South Carolina · 3 MI SE of Columbia · Structure no. 000000000004883

Built
1966
59 years old
Condition
Fair
inspected December 2024
Type
Channel Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
475
2023 count
Owner
State
State Highway Agency

About this bridge

S-40-1021 over Trib to Gills Creek is a prestressed concrete channel beam carrying S-40-1021 over Trib to Gills Creek in Richland County, South Carolina. It was built in 1966, so it is 59 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. Its operating status is: posted for load restriction.

It carries about 475 vehicles a day, roughly 5% of them trucks, projected to reach 608 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesS-40-1021
CrossesTrib to Gills Creek
Location3 MI SE of Columbia
RouteState Highway 1021
CountyRichland County
StateSouth Carolina
Coordinates33.97484, -80.99138
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28.5 US tons
Inventory rating9.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2023)
Projected traffic608 by 2043
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-40-1021 over Trib to Gills Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is S-40-1021 over Trib to 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 December 2024.

How much traffic does S-40-1021 over Trib to Gills Creek carry?

About 475 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-40-1021 over Trib to Gills Creek?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns S-40-1021 over Trib to Gills Creek?

It is owned by the State Highway Agency.