US Bridges

US 76 over RR CSXT

PoorPosted for load

Richland County, South Carolina · 4 MI NW of Irmo · Structure no. 000000000000969

Built
1939
86 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
396 ft
9 main spans
Daily traffic
21,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 76 over RR CSXT is a steel stringer/multi-beam or girder carrying US 76 over RR CSXT in Richland County, South Carolina. It was built in 1939, so it is 86 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 21,600 vehicles a day, roughly 3% of them trucks, projected to reach 29,160 by 2043. The structure is 396 ft (120.7 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 76
CrossesRR CSXT
Location4 MI NW of Irmo
RouteU.S. Route 76
CountyRichland County
StateSouth Carolina
Coordinates34.12556, -81.23139
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadH 15
Structure length396 ft (120.7 m)
Longest span44 ft (13.4 m)
Deck width42 ft (12.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,600 (2023)
Projected traffic29,160 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 76 over RR CSXT built?

It was built in 1939, making it 86 years old in 2025.

What condition is US 76 over RR CSXT in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does US 76 over RR CSXT carry?

About 21,600 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 76 over RR CSXT?

The structure is 396 ft (120.7 m) long with a longest span of 44 ft (13.4 m) and a deck 42 ft wide.

Who owns US 76 over RR CSXT?

It is owned by the State Highway Agency.