US Bridges

Sc 31 Con over Intercoastal Waterway

Good

Horry County, South Carolina · Myrtle Beach · Structure no. 000000000010203

Built
2010
15 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,010 ft
3 main spans
Daily traffic
32,200
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 31 Con over Intercoastal Waterway is a prestressed concrete continuous stringer/multi-beam or girder carrying Sc 31 Con over Intercoastal Waterway in Horry County, South Carolina. It was built in 2010, so it is 15 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32,200 vehicles a day, roughly 4% of them trucks, projected to reach 39,284 by 2043. The structure is 1,010 ft (307.8 m) long and 76 ft wide.

Location

Open in Google Maps
CarriesSc 31 Con
CrossesIntercoastal Waterway
LocationMyrtle Beach
RouteState Highway 31
CountyHorry County
StateSouth Carolina
Coordinates33.83403, -78.68428
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHL 93
Structure length1,010 ft (307.8 m)
Longest span230 ft (70.1 m)
Deck width76 ft (23.2 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic32,200 (2023)
Projected traffic39,284 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Sc 31 Con over Intercoastal Waterway built?

It was built in 2010, making it 15 years old in 2025.

What condition is Sc 31 Con over Intercoastal Waterway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Sc 31 Con over Intercoastal Waterway carry?

About 32,200 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Sc 31 Con over Intercoastal Waterway?

The structure is 1,010 ft (307.8 m) long with a longest span of 230 ft (70.1 m) and a deck 76 ft wide.

Who owns Sc 31 Con over Intercoastal Waterway?

It is owned by the State Highway Agency.