US Bridges

US 21 over Steele Creek

Fair

York County, South Carolina · 9.8 MI N Rock Hill · Structure no. 000000000001276

Built
1942
83 years old, rebuilt 1975
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
160 ft
5 main spans
Daily traffic
8,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 21 over Steele Creek is a concrete tee beam carrying US 21 over Steele Creek in York County, South Carolina. It was built in 1942 and reconstructed in 1975, so it is 83 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 8,400 vehicles a day, roughly 7% of them trucks, projected to reach 11,004 by 2043. The structure is 160 ft (48.8 m) long and 47 ft wide.

CarriesUS 21
CrossesSteele Creek
Location9.8 MI N Rock Hill
RouteU.S. Route 21
Coordinates35.04475, -80.94114
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating19.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length160 ft (48.8 m)
Longest span40 ft (12.2 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,400 (2023)
Projected traffic11,004 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 21 over Steele Creek built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1975.

What condition is US 21 over Steele Creek 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 June 2024.

How much traffic does US 21 over Steele Creek carry?

About 8,400 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 21 over Steele Creek?

The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 47 ft wide.

Who owns US 21 over Steele Creek?

It is owned by the State Highway Agency.