US Bridges

I-77 SB over Scl Railroad

Fair

Chester County, South Carolina · 1.8 MI S York CO Line · Structure no. 000000000007082

Built
1978
47 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
225 ft
5 main spans
Daily traffic
28,150
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 SB over Scl Railroad is a steel continuous stringer/multi-beam or girder carrying I-77 SB over Scl Railroad in Chester County, South Carolina. It was built in 1978, so it is 47 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 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 28,150 vehicles a day, roughly 18% of them trucks, projected to reach 54,048 by 2043. The structure is 225 ft (68.6 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI-77 SB
CrossesScl Railroad
Location1.8 MI S York CO Line
RouteInterstate 77
CountyChester County
StateSouth Carolina
Coordinates34.7939, -81.03794
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,150 (2023)
Projected traffic54,048 by 2043
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 SB over Scl Railroad built?

It was built in 1978, making it 47 years old in 2025.

What condition is I-77 SB over Scl Railroad 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 2023.

How much traffic does I-77 SB over Scl Railroad carry?

About 28,150 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-77 SB over Scl Railroad?

The structure is 225 ft (68.6 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns I-77 SB over Scl Railroad?

It is owned by the State Highway Agency.