US Bridges

I-77 over Steel Creek

Fair

York County, South Carolina · 11.0 MI N of Rock Hill · Structure no. 000000000006397

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
53 ft
4 main spans
Daily traffic
130,800
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 over Steel Creek is a concrete culvert carrying I-77 over Steel Creek in York County, South Carolina. It was built in 1973, so it is 52 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 130,800 vehicles a day, roughly 12% of them trucks, projected to reach 183,120 by 2043. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesI-77
CrossesSteel Creek
Location11.0 MI N of Rock Hill
RouteInterstate 77
Coordinates35.07028, -80.94889
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating48.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 20
Structure length53 ft (16.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130,800 (2023)
Projected traffic183,120 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-77 over Steel Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-77 over Steel 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 March 2024.

How much traffic does I-77 over Steel Creek carry?

About 130,800 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I-77 over Steel Creek?

The structure is 53 ft (16.2 m) long with a longest span of 12 ft (3.7 m).

Who owns I-77 over Steel Creek?

It is owned by the State Highway Agency.