US Bridges

Ramp Off I-77 NB over I-26 & I-77

Fair

Lexington County, South Carolina · 5 MI SW of Columbia · Structure no. 000000000008021

Built
1986
39 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,257 ft
7 main spans
Daily traffic
10,000
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp Off I-77 NB over I-26 & I-77 is a steel continuous stringer/multi-beam or girder carrying Ramp Off I-77 NB over I-26 & I-77 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 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 10,000 vehicles a day, roughly 9% of them trucks, projected to reach 21,100 by 2043. The structure is 1,257 ft (383.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRamp Off I-77 NB
CrossesI-26 & I-77
Location5 MI SW of Columbia
RouteInterstate 77
CountyLexington County
StateSouth Carolina
Coordinates33.92913, -81.07003
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7 (+1 approach)
Design loadHS 20 + Mod
Structure length1,257 ft (383.1 m)
Longest span200 ft (61 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2023)
Projected traffic21,100 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.4 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp Off I-77 NB over I-26 & I-77 built?

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

What condition is Ramp Off I-77 NB over I-26 & 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 December 2023.

How much traffic does Ramp Off I-77 NB over I-26 & I-77 carry?

About 10,000 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp Off I-77 NB over I-26 & I-77?

The structure is 1,257 ft (383.1 m) long with a longest span of 200 ft (61 m) and a deck 43 ft wide.

Who owns Ramp Off I-77 NB over I-26 & I-77?

It is owned by the State Highway Agency.