US Bridges

Sc 61 NB over US 17&RAMPSONUS17&SC700

Fair

Charleston County, South Carolina · In Charleston · Structure no. 000000000008813

Built
1995
30 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
941 ft
10 main spans
Daily traffic
26,800
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 61 NB over US 17&RAMPSONUS17&SC700 is a steel continuous stringer/multi-beam or girder carrying Sc 61 NB over US 17&RAMPSONUS17&SC700 in Charleston County, South Carolina. It was built in 1995, so it is 30 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 26,800 vehicles a day, roughly 2% of them trucks, projected to reach 38,324 by 2043. The structure is 941 ft (286.8 m) long and 37 ft wide.

Location

Open in Google Maps
CarriesSc 61 NB
CrossesUS 17&RAMPSONUS17&SC700
LocationIn Charleston
RouteState Highway 61
CountyCharleston County
StateSouth Carolina
Coordinates32.78025, -79.96893
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length941 ft (286.8 m)
Longest span137 ft (41.8 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,800 (2023)
Projected traffic38,324 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 Sc 61 NB over US 17&RAMPSONUS17&SC700 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Sc 61 NB over US 17&RAMPSONUS17&SC700 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 June 2024.

How much traffic does Sc 61 NB over US 17&RAMPSONUS17&SC700 carry?

About 26,800 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sc 61 NB over US 17&RAMPSONUS17&SC700?

The structure is 941 ft (286.8 m) long with a longest span of 137 ft (41.8 m) and a deck 37 ft wide.

Who owns Sc 61 NB over US 17&RAMPSONUS17&SC700?

It is owned by the State Highway Agency.