US Bridges

US 1 over RR CSXT

FairPosted for load

Richland County, South Carolina · 5 MI NE of Columbia · Structure no. 000000000001758

Built
1935
90 years old, rebuilt 1962
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
117 ft
3 main spans
Daily traffic
20,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 1 over RR CSXT is a concrete tee beam carrying US 1 over RR CSXT in Richland County, South Carolina. It was built in 1935 and reconstructed in 1962, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 20,100 vehicles a day, roughly 2% of them trucks, projected to reach 31,557 by 2043. The structure is 117 ft (35.7 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 1
CrossesRR CSXT
Location5 MI NE of Columbia
RouteU.S. Route 1
CountyRichland County
StateSouth Carolina
Coordinates34.0514, -80.98359
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating34.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span39 ft (11.9 m)
Deck width89 ft (27.2 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,100 (2023)
Projected traffic31,557 by 2043
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 1 over RR CSXT built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1962.

What condition is US 1 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 US 1 over RR CSXT carry?

About 20,100 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 1 over RR CSXT?

The structure is 117 ft (35.7 m) long with a longest span of 39 ft (11.9 m) and a deck 89 ft wide.

Who owns US 1 over RR CSXT?

It is owned by the State Highway Agency.