US Bridges

Ramp on Sc 30 WB over Marsh

Fair

Charleston County, South Carolina · In Charleston · Structure no. 000000000008624

Built
1993
32 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
630 ft
21 main spans
Daily traffic
11,922
2014 count
Owner
State
State Highway Agency

About this bridge

Ramp on Sc 30 WB over Marsh is a concrete continuous slab carrying Ramp on Sc 30 WB over Marsh in Charleston County, South Carolina. It was built in 1993, so it is 32 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 11,922 vehicles a day, projected to reach 19,314 by 2034. The structure is 630 ft (192 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRamp on Sc 30 WB
CrossesMarsh
LocationIn Charleston
RouteState Highway 30
CountyCharleston County
StateSouth Carolina
Coordinates32.75558, -79.96214
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans21
Design loadHS 20
Structure length630 ft (192 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,922 (2014)
Projected traffic19,314 by 2034
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ramp on Sc 30 WB over Marsh built?

It was built in 1993, making it 32 years old in 2025.

What condition is Ramp on Sc 30 WB over Marsh 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 July 2024.

How much traffic does Ramp on Sc 30 WB over Marsh carry?

About 11,922 vehicles per day (2014 count).

How long is Ramp on Sc 30 WB over Marsh?

The structure is 630 ft (192 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns Ramp on Sc 30 WB over Marsh?

It is owned by the State Highway Agency.