US Bridges

S-46-160 over US 21

Fair

York County, South Carolina · 6.5 MI SE Rock Hill · Structure no. 000000000004908

Built
1966
59 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
232 ft
4 main spans
Daily traffic
1,700
2023 count
Owner
State
State Highway Agency

About this bridge

S-46-160 over US 21 is a steel stringer/multi-beam or girder carrying S-46-160 over US 21 in York County, South Carolina. It was built in 1966, so it is 59 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 5 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 1,700 vehicles a day, roughly 3% of them trucks, projected to reach 2,261 by 2043. The structure is 232 ft (70.7 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesS-46-160
CrossesUS 21
Location6.5 MI SE Rock Hill
RouteState Highway 160
CountyYork County
StateSouth Carolina
Coordinates34.87488, -80.93139
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55.3 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length232 ft (70.7 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2023)
Projected traffic2,261 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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-46-160 over US 21 built?

It was built in 1966, making it 59 years old in 2025.

What condition is S-46-160 over US 21 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-46-160 over US 21 carry?

About 1,700 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-46-160 over US 21?

The structure is 232 ft (70.7 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns S-46-160 over US 21?

It is owned by the State Highway Agency.