US Bridges

Sc 9 Nbl over Waccamaw River

Fair

Horry County, South Carolina · 3.0 MI SE of Longs · Structure no. 000000000008004

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
570 ft
19 main spans
Daily traffic
14,750
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 9 Nbl over Waccamaw River is a concrete slab carrying Sc 9 Nbl over Waccamaw River in Horry County, South Carolina. It was built in 1986, so it is 39 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 14,750 vehicles a day, roughly 5% of them trucks, projected to reach 18,880 by 2043. The structure is 570 ft (173.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSc 9 Nbl
CrossesWaccamaw River
Location3.0 MI SE of Longs
RouteState Highway 9
CountyHorry County
StateSouth Carolina
Coordinates33.91186, -78.71428
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans19
Design loadHS 20
Structure length570 ft (173.7 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,750 (2023)
Projected traffic18,880 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 9 Nbl over Waccamaw River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Sc 9 Nbl over Waccamaw River 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 August 2024.

How much traffic does Sc 9 Nbl over Waccamaw River carry?

About 14,750 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sc 9 Nbl over Waccamaw River?

The structure is 570 ft (173.7 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns Sc 9 Nbl over Waccamaw River?

It is owned by the State Highway Agency.