US Bridges

S-40-1201 over I-77

Fair

Richland County, South Carolina · 8 MI NE Columbia · Structure no. 000000000007406

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
412 ft
2 main spans
Daily traffic
4,200
2023 count
Owner
State
State Highway Agency

About this bridge

S-40-1201 over I-77 is a steel continuous stringer/multi-beam or girder carrying S-40-1201 over I-77 in Richland County, South Carolina. It was built in 1980, so it is 45 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 4,200 vehicles a day, roughly 3% of them trucks, projected to reach 6,762 by 2043. The structure is 412 ft (125.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-40-1201
CrossesI-77
Location8 MI NE Columbia
RouteState Highway 1201
CountyRichland County
StateSouth Carolina
Coordinates34.0639, -80.922
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating31.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length412 ft (125.6 m)
Longest span179 ft (54.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2023)
Projected traffic6,762 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-40-1201 over I-77 built?

It was built in 1980, making it 45 years old in 2025.

What condition is S-40-1201 over I-77 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 February 2023.

How much traffic does S-40-1201 over I-77 carry?

About 4,200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-40-1201 over I-77?

The structure is 412 ft (125.6 m) long with a longest span of 179 ft (54.6 m) and a deck 43 ft wide.

Who owns S-40-1201 over I-77?

It is owned by the State Highway Agency.