US Bridges

S-46-813 over I-77

Fair

York County, South Carolina · 6.9 MI S Rock Hill · Structure no. 000000000007307

Built
1979
46 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
363 ft
4 main spans
Daily traffic
225
2023 count
Owner
State
State Highway Agency

About this bridge

S-46-813 over I-77 is a steel stringer/multi-beam or girder carrying S-46-813 over I-77 in York County, South Carolina. It was built in 1979, so it is 46 years old, younger 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 225 vehicles a day, roughly 14% of them trucks, projected to reach 475 by 2043. The structure is 363 ft (110.6 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-46-813
CrossesI-77
Location6.9 MI S Rock Hill
RouteState Highway 813
CountyYork County
StateSouth Carolina
Coordinates34.83341, -81.02954
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 rating52.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length363 ft (110.6 m)
Longest span113 ft (34.4 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2023)
Projected traffic475 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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-46-813 over I-77 built?

It was built in 1979, making it 46 years old in 2025.

What condition is S-46-813 over I-77 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 April 2023.

How much traffic does S-46-813 over I-77 carry?

About 225 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is S-46-813 over I-77?

The structure is 363 ft (110.6 m) long with a longest span of 113 ft (34.4 m) and a deck 37 ft wide.

Who owns S-46-813 over I-77?

It is owned by the State Highway Agency.