US Bridges

Ramp Off US 17 SB over Marsh & RR CSXT

Fair

Charleston County, South Carolina · Charleston City Limits · Structure no. 000000000009838

Built
2005
20 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
798 ft
6 main spans
Daily traffic
15,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp Off US 17 SB over Marsh & RR CSXT is a prestressed concrete continuous stringer/multi-beam or girder carrying Ramp Off US 17 SB over Marsh & RR CSXT in Charleston County, South Carolina. It was built in 2005, so it is 20 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 15,700 vehicles a day, projected to reach 23,393 by 2043. The structure is 798 ft (243.1 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesRamp Off US 17 SB
CrossesMarsh & RR CSXT
LocationCharleston City Limits
RouteU.S. Route 17
CountyCharleston County
StateSouth Carolina
Coordinates32.80482, -79.93957
Functional classUrban Other Principal Arterial

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length798 ft (243.1 m)
Longest span148 ft (45.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,700 (2023)
Projected traffic23,393 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US 17 SB over Marsh & RR CSXT built?

It was built in 2005, making it 20 years old in 2025.

What condition is Ramp Off US 17 SB over Marsh & RR CSXT 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 May 2023.

How much traffic does Ramp Off US 17 SB over Marsh & RR CSXT carry?

About 15,700 vehicles per day (2023 count).

How long is Ramp Off US 17 SB over Marsh & RR CSXT?

The structure is 798 ft (243.1 m) long with a longest span of 148 ft (45.1 m) and a deck 31 ft wide.

Who owns Ramp Off US 17 SB over Marsh & RR CSXT?

It is owned by the State Highway Agency.