US Bridges

Sc 277 NB over RR CSXT

Fair

Richland County, South Carolina · 3 MI NE of Columbia · Structure no. 000000000006566

Built
1974
51 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
222 ft
3 main spans
Daily traffic
21,250
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 277 NB over RR CSXT is a steel continuous stringer/multi-beam or girder carrying Sc 277 NB over RR CSXT in Richland County, South Carolina. It was built in 1974, so it is 51 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 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 21,250 vehicles a day, roughly 2% of them trucks, projected to reach 49,938 by 2043. The structure is 222 ft (67.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSc 277 NB
CrossesRR CSXT
Location3 MI NE of Columbia
RouteState Highway 277
CountyRichland County
StateSouth Carolina
Coordinates34.0475, -81.00806
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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
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 rating49.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span74 ft (22.6 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,250 (2023)
Projected traffic49,938 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
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 NB over RR CSXT built?

It was built in 1974, making it 51 years old in 2025.

What condition is Sc 277 NB over RR CSXT 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 NB over RR CSXT carry?

About 21,250 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sc 277 NB over RR CSXT?

The structure is 222 ft (67.7 m) long with a longest span of 74 ft (22.6 m) and a deck 43 ft wide.

Who owns Sc 277 NB over RR CSXT?

It is owned by the State Highway Agency.