US Bridges

I-77 NB over RR Lc

Fair

Chester County, South Carolina · 0.8 MI NW of Richburg · Structure no. 000000000007210

Built
1979
46 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
220 ft
4 main spans
Daily traffic
24,450
2023 count
Owner
State
State Highway Agency

About this bridge

I-77 NB over RR Lc is a prestressed concrete stringer/multi-beam or girder carrying I-77 NB over RR Lc in Chester 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 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 24,450 vehicles a day, roughly 18% of them trucks, projected to reach 46,944 by 2043. The structure is 220 ft (67.1 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI-77 NB
CrossesRR Lc
Location0.8 MI NW of Richburg
RouteInterstate 77
CountyChester County
StateSouth Carolina
Coordinates34.72208, -81.03246
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating53.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length220 ft (67.1 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 traffic24,450 (2023)
Projected traffic46,944 by 2043
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 NB over RR Lc built?

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

What condition is I-77 NB over RR Lc 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 2025.

How much traffic does I-77 NB over RR Lc carry?

About 24,450 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-77 NB over RR Lc?

The structure is 220 ft (67.1 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns I-77 NB over RR Lc?

It is owned by the State Highway Agency.