US Bridges

US 21 over I-26 (no 2)

Fair

Lexington County, South Carolina · 6MI S of Cayce · Structure no. 000000000003030

Built
1959
66 years old, rebuilt 1992
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
236 ft
4 main spans
Daily traffic
4,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 21 over I-26 (no 2) is a prestressed concrete stringer/multi-beam or girder carrying US 21 over I-26 (no 2) in Lexington County, South Carolina. It was built in 1959 and reconstructed in 1992, so it is 66 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 4,400 vehicles a day, roughly 9% of them trucks, projected to reach 6,072 by 2043. The structure is 236 ft (71.9 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesUS 21
CrossesI-26 (no 2)
Location6MI S of Cayce
RouteU.S. Route 21
CountyLexington County
StateSouth Carolina
Coordinates33.88055, -81.0369
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length236 ft (71.9 m)
Longest span65 ft (19.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2023)
Projected traffic6,072 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$614,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 21 over I-26 (no 2) built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1992.

What condition is US 21 over I-26 (no 2) 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 October 2023.

How much traffic does US 21 over I-26 (no 2) carry?

About 4,400 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 21 over I-26 (no 2)?

The structure is 236 ft (71.9 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.

Who owns US 21 over I-26 (no 2)?

It is owned by the State Highway Agency.