US Bridges

US 17 NB over Ramp 5030 and 5031

Fair

Charleston County, South Carolina · In Charleston · Structure no. 000000000007074

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
582 ft
4 main spans
Daily traffic
20,450
2023 count
Owner
State
State Highway Agency

About this bridge

US 17 NB over Ramp 5030 and 5031 is a steel stringer/multi-beam or girder carrying US 17 NB over Ramp 5030 and 5031 in Charleston County, South Carolina. It was built in 1978, so it is 47 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 20,450 vehicles a day, roughly 2% of them trucks, projected to reach 30,266 by 2043. The structure is 582 ft (177.3 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 17 NB
CrossesRamp 5030 and 5031
LocationIn Charleston
RouteU.S. Route 17
CountyCharleston County
StateSouth Carolina
Coordinates32.77932, -79.97057
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 rating61.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+6 approach)
Design loadHS 20
Structure length582 ft (177.3 m)
Longest span105 ft (32 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,450 (2023)
Projected traffic30,266 by 2043
Trucks2%
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 NetworkInterstate 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 US 17 NB over Ramp 5030 and 5031 built?

It was built in 1978, making it 47 years old in 2025.

What condition is US 17 NB over Ramp 5030 and 5031 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 US 17 NB over Ramp 5030 and 5031 carry?

About 20,450 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 17 NB over Ramp 5030 and 5031?

The structure is 582 ft (177.3 m) long with a longest span of 105 ft (32 m) and a deck 33 ft wide.

Who owns US 17 NB over Ramp 5030 and 5031?

It is owned by the State Highway Agency.