US Bridges

NC50 over Sandy Run Swamp

Good

Onslow County, North Carolina · 0.6MI.N. of JCT.SR1104 · Structure no. 000000001330031

Built
2022
3 years old
Condition
Good
inspected June 2024
Type
Slab
Prestressed Concrete
Length
138 ft
3 main spans
Daily traffic
2,200
2021 count
Owner
State
State Highway Agency

About this bridge

NC50 over Sandy Run Swamp is a prestressed concrete slab carrying NC50 over Sandy Run Swamp in Onslow County, North Carolina. It was built in 2022, so it is 3 years old, younger than the North Carolina average of 38.7 years.

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

It carries about 2,200 vehicles a day, roughly 7% of them trucks, projected to reach 4,400 by 2040. The structure is 138 ft (42 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNC50
CrossesSandy Run Swamp
Location0.6MI.N. of JCT.SR1104
RouteState Highway 50
CountyOnslow County
StateNorth Carolina
Coordinates34.63821, -77.61619
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.9 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length138 ft (42 m)
Longest span49 ft (14.9 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2021)
Projected traffic4,400 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NC50 over Sandy Run Swamp built?

It was built in 2022, making it 3 years old in 2025.

What condition is NC50 over Sandy Run Swamp 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 June 2024.

How much traffic does NC50 over Sandy Run Swamp carry?

About 2,200 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is NC50 over Sandy Run Swamp?

The structure is 138 ft (42 m) long with a longest span of 49 ft (14.9 m) and a deck 36 ft wide.

Who owns NC50 over Sandy Run Swamp?

It is owned by the State Highway Agency.