I-20 over Sou. RR & Priv. Rd. .

Fair

Richland County, South Carolina · 4MI N of Columbia · Structure no. 000000000004639

Built: 1965; 60 years old, rebuilt 1991
Condition: Fair; inspected February 2024
Type: Stringer/Multi-beam or Girder; Prestressed Concrete
Length: 218 ft; 4 main spans
Daily traffic: 123,700; 2023 count
Owner: State; State Highway Agency

About this bridge

I-20 over Sou. RR & Priv. Rd. . is a prestressed concrete stringer/multi-beam or girder carrying I-20 over Sou. RR & Priv. Rd. . in Richland County, South Carolina. It was built in 1965 and reconstructed in 1991, so it is 60 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 123,700 vehicles a day, roughly 9% of them trucks, projected to reach 153,388 by 2043. The structure is 218 ft (66.4 m) long and 110 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

No coordinates are recorded for this structure.

CarriesI-20

CrossesSou. RR & Priv. Rd. .

Location4MI N of Columbia

RouteInterstate 20

CountyRichland County

StateSouth Carolina

Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionFebruary 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry9: Superior to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating41.8 US tons

Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder

MaterialPrestressed Concrete

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20 + Mod

Structure length218 ft (66.4 m)

Longest span62 ft (18.9 m)

Deck width110 ft (33.5 m)

Roadway width100 ft (30.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123,700 (2023)

Projected traffic153,388 by 2043

Trucks9%

Lanes on structure6

Traffic directionTwo-way traffic

CarriesHighway

CrossesRailroad

Detour if closed1.2 mi (2 km)

TollOn a free road

National Highway SystemYes

Strategic Highway NetworkInterstate STRAHNET route

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 I-20 over Sou. RR & Priv. Rd. . built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1991.

What condition is I-20 over Sou. RR & Priv. Rd. . 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 I-20 over Sou. RR & Priv. Rd. . carry?

About 123,700 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-20 over Sou. RR & Priv. Rd. .?

The structure is 218 ft (66.4 m) long with a longest span of 62 ft (18.9 m) and a deck 110 ft wide.

Who owns I-20 over Sou. RR & Priv. Rd. .?

It is owned by the State Highway Agency.