US Bridges

I-77 NB over Gills Creek

Good

Richland County, South Carolina · 4 MI SE of Columbia · Structure no. 000000000007610

Built
1982
43 years old, rebuilt 1992
Condition
Good
inspected January 2025
Type
Slab
Concrete
Length
330 ft
11 main spans
Daily traffic
42,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 NB over Gills Creek is a concrete slab carrying I-77 NB over Gills Creek in Richland County, South Carolina. It was built in 1982 and reconstructed in 1992, so it is 43 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 42,500 vehicles a day, roughly 16% of them trucks, projected to reach 52,700 by 2043. The structure is 330 ft (100.6 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-77 NB
CrossesGills Creek
Location4 MI SE of Columbia
RouteInterstate 77
Coordinates33.95098, -80.98624
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20 + Mod
Structure length330 ft (100.6 m)
Longest span30 ft (9.1 m)
Deck width80 ft (24.4 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,500 (2023)
Projected traffic52,700 by 2043
Trucks16%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-77 NB over Gills Creek built?

It was built in 1982, making it 43 years old in 2025. It was reconstructed in 1992.

What condition is I-77 NB over Gills Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does I-77 NB over Gills Creek carry?

About 42,500 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-77 NB over Gills Creek?

The structure is 330 ft (100.6 m) long with a longest span of 30 ft (9.1 m) and a deck 80 ft wide.

Who owns I-77 NB over Gills Creek?

It is owned by the State Highway Agency.