US Bridges

Ramp on I-77 NB over Wildcat Creek

Good

Richland County, South Carolina · 4 MI E of Columbia · Structure no. 000000000008482

Built
1991
34 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
360 ft
1 main span
Daily traffic
8,100
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp on I-77 NB over Wildcat Creek is a steel stringer/multi-beam or girder carrying Ramp on I-77 NB over Wildcat Creek in Richland County, South Carolina. It was built in 1991, so it is 34 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 8,100 vehicles a day, roughly 9% of them trucks, projected to reach 17,091 by 2043. The structure is 360 ft (109.7 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesRamp on I-77 NB
CrossesWildcat Creek
Location4 MI E of Columbia
RouteInterstate 77
CountyRichland County
StateSouth Carolina
Coordinates33.99601, -80.95839
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+10 approach)
Design loadHS 20 + Mod
Structure length360 ft (109.7 m)
Longest span60 ft (18.3 m)
Deck width46 ft (14 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,100 (2023)
Projected traffic17,091 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ramp on I-77 NB over Wildcat Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Ramp on I-77 NB over Wildcat 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 2024.

How much traffic does Ramp on I-77 NB over Wildcat Creek carry?

About 8,100 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp on I-77 NB over Wildcat Creek?

The structure is 360 ft (109.7 m) long with a longest span of 60 ft (18.3 m) and a deck 46 ft wide.

Who owns Ramp on I-77 NB over Wildcat Creek?

It is owned by the State Highway Agency.