US Bridges

Ramp Off I-526 EB over I-526 & S-56

Fair

Charleston County, South Carolina · Near Mount Pleasant · Structure no. 000000000008420

Built
1991
34 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,512 ft
12 main spans
Daily traffic
8,600
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp Off I-526 EB over I-526 & S-56 is a steel continuous stringer/multi-beam or girder carrying Ramp Off I-526 EB over I-526 & S-56 in Charleston County, South Carolina. It was built in 1991, so it is 34 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 8,600 vehicles a day, roughly 9% of them trucks, projected to reach 19,694 by 2043. The structure is 1,512 ft (460.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRamp Off I-526 EB
CrossesI-526 & S-56
LocationNear Mount Pleasant
RouteInterstate 526
CountyCharleston County
StateSouth Carolina
Coordinates32.82119, -79.849
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20 + Mod
Structure length1,512 ft (460.8 m)
Longest span163 ft (49.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (2023)
Projected traffic19,694 by 2043
Trucks9%
Lanes on structure1
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp Off I-526 EB over I-526 & S-56 built?

It was built in 1991, making it 34 years old in 2025.

What condition is Ramp Off I-526 EB over I-526 & S-56 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 August 2024.

How much traffic does Ramp Off I-526 EB over I-526 & S-56 carry?

About 8,600 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ramp Off I-526 EB over I-526 & S-56?

The structure is 1,512 ft (460.8 m) long with a longest span of 163 ft (49.7 m) and a deck 35 ft wide.

Who owns Ramp Off I-526 EB over I-526 & S-56?

It is owned by the State Highway Agency.