US Bridges

Sc 277 SB over Sc 16

Fair

Richland County, South Carolina · City of Columbia · Structure no. 000000000006368

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
258 ft
4 main spans
Daily traffic
21,600
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 277 SB over Sc 16 is a steel continuous stringer/multi-beam or girder carrying Sc 277 SB over Sc 16 in Richland County, South Carolina. It was built in 1973, so it is 52 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 5 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 21,600 vehicles a day, roughly 2% of them trucks, projected to reach 50,760 by 2043. The structure is 258 ft (78.6 m) long and 55 ft wide.

Location

Open in Google Maps
CarriesSc 277 SB
CrossesSc 16
LocationCity of Columbia
RouteState Highway 277
CountyRichland County
StateSouth Carolina
Coordinates34.02972, -81.03528
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span89 ft (27.1 m)
Deck width55 ft (16.7 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,600 (2023)
Projected traffic50,760 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sc 277 SB over Sc 16 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Sc 277 SB over Sc 16 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 2024.

How much traffic does Sc 277 SB over Sc 16 carry?

About 21,600 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sc 277 SB over Sc 16?

The structure is 258 ft (78.6 m) long with a longest span of 89 ft (27.1 m) and a deck 55 ft wide.

Who owns Sc 277 SB over Sc 16?

It is owned by the State Highway Agency.