US Bridges

I-77 NB over US 76/378 & Sc 262

Fair

Richland County, South Carolina · 5 MI E of Columbia · Structure no. 000000000008479

Built
1991
34 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,080 ft
14 main spans
Daily traffic
43,250
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 NB over US 76/378 & Sc 262 is a steel continuous stringer/multi-beam or girder carrying I-77 NB over US 76/378 & Sc 262 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 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 43,250 vehicles a day, roughly 16% of them trucks, projected to reach 53,630 by 2043. The structure is 1,080 ft (329.2 m) long and 90 ft wide.

Location

Open in Google Maps
CarriesI-77 NB
CrossesUS 76/378 & Sc 262
Location5 MI E of Columbia
RouteInterstate 77
CountyRichland County
StateSouth Carolina
Coordinates33.97481, -80.95487
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20 + Mod
Structure length1,080 ft (329.2 m)
Longest span102 ft (31.2 m)
Deck width90 ft (27.5 m)
Roadway width87 ft (26.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,250 (2023)
Projected traffic53,630 by 2043
Trucks16%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 NB over US 76/378 & Sc 262 built?

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

What condition is I-77 NB over US 76/378 & Sc 262 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 January 2024.

How much traffic does I-77 NB over US 76/378 & Sc 262 carry?

About 43,250 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-77 NB over US 76/378 & Sc 262?

The structure is 1,080 ft (329.2 m) long with a longest span of 102 ft (31.2 m) and a deck 90 ft wide.

Who owns I-77 NB over US 76/378 & Sc 262?

It is owned by the State Highway Agency.