US Bridges

Ramp of I-77 SB over Rampoff I-26 WB

Good

Lexington County, South Carolina · 5 MI SW of Columbia · Structure no. 000000000008020

Built
1986
39 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
380 ft
3 main spans
Daily traffic
8,650
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp of I-77 SB over Rampoff I-26 WB is a steel stringer/multi-beam or girder carrying Ramp of I-77 SB over Rampoff I-26 WB in Lexington County, South Carolina. It was built in 1986, so it is 39 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,650 vehicles a day, roughly 9% of them trucks, projected to reach 18,252 by 2043. The structure is 380 ft (115.8 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRamp of I-77 SB
CrossesRampoff I-26 WB
Location5 MI SW of Columbia
RouteInterstate 3277
Coordinates33.93028, -81.07083
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length380 ft (115.8 m)
Longest span173 ft (52.7 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,650 (2023)
Projected traffic18,252 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 Ramp of I-77 SB over Rampoff I-26 WB built?

It was built in 1986, making it 39 years old in 2025.

What condition is Ramp of I-77 SB over Rampoff I-26 WB in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Ramp of I-77 SB over Rampoff I-26 WB carry?

About 8,650 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp of I-77 SB over Rampoff I-26 WB?

The structure is 380 ft (115.8 m) long with a longest span of 173 ft (52.7 m) and a deck 43 ft wide.

Who owns Ramp of I-77 SB over Rampoff I-26 WB?

It is owned by the State Highway Agency.