US Bridges

Ramp on I-20 EB over Stream

Good

Richland County, South Carolina · 5 MI NE of Columbia · Structure no. 000000000004650

Built
1965
60 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
4,000
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp on I-20 EB over Stream is a concrete culvert carrying Ramp on I-20 EB over Stream in Richland County, South Carolina. It was built in 1965, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,000 vehicles a day, roughly 9% of them trucks, projected to reach 5,480 by 2043. The structure is 21 ft (6.4 m) long and 229 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRamp on I-20 EB
CrossesStream
Location5 MI NE of Columbia
RouteU.S. Route 21
Coordinates34.07244, -80.99801
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width229 ft (69.8 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2023)
Projected traffic5,480 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ramp on I-20 EB over Stream built?

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

What condition is Ramp on I-20 EB over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does Ramp on I-20 EB over Stream carry?

About 4,000 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp on I-20 EB over Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 229 ft wide.

Who owns Ramp on I-20 EB over Stream?

It is owned by the State Highway Agency.