US Bridges

S-16-290 over I-20

Fair

Darlington County, South Carolina · 3MI W Darlington · Structure no. 000000000006468

Built
1974
51 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
240 ft
4 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

S-16-290 over I-20 is a steel stringer/multi-beam or girder carrying S-16-290 over I-20 in Darlington County, South Carolina. It was built in 1974, so it is 51 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 275 vehicles a day, roughly 4% of them trucks, projected to reach 352 by 2043. The structure is 240 ft (73.2 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-16-290
CrossesI-20
Location3MI W Darlington
RouteState Highway 290
Coordinates34.19845, -80.08512
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length240 ft (73.2 m)
Longest span87 ft (26.5 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic352 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-16-290 over I-20 built?

It was built in 1974, making it 51 years old in 2025.

What condition is S-16-290 over I-20 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 January 2025.

How much traffic does S-16-290 over I-20 carry?

About 275 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-16-290 over I-20?

The structure is 240 ft (73.2 m) long with a longest span of 87 ft (26.5 m) and a deck 37 ft wide.

Who owns S-16-290 over I-20?

It is owned by the State Highway Agency.