US Bridges

NC20 over Gallberry Swamp

Good

Robeson County, North Carolina · 0.6 Mi. E.Jct. SR1923 · Structure no. 000000001550051

Built
2000
25 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
175 ft
4 main spans
Daily traffic
3,700
2021 count
Owner
State
State Highway Agency

About this bridge

NC20 over Gallberry Swamp is a prestressed concrete slab carrying NC20 over Gallberry Swamp in Robeson County, North Carolina. It was built in 2000, so it is 25 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 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 3,700 vehicles a day, roughly 7% of them trucks, projected to reach 7,400 by 2040. The structure is 175 ft (53.3 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNC20
CrossesGallberry Swamp
Location0.6 Mi. E.Jct. SR1923
RouteState Highway 20
CountyRobeson County
StateNorth Carolina
Coordinates34.8041, -78.88776
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum 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 rating81.9 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20 + Mod
Structure length175 ft (53.3 m)
Longest span46 ft (14 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2021)
Projected traffic7,400 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 NC20 over Gallberry Swamp built?

It was built in 2000, making it 25 years old in 2025.

What condition is NC20 over Gallberry 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 May 2023.

How much traffic does NC20 over Gallberry Swamp carry?

About 3,700 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is NC20 over Gallberry Swamp?

The structure is 175 ft (53.3 m) long with a longest span of 46 ft (14 m) and a deck 33 ft wide.

Who owns NC20 over Gallberry Swamp?

It is owned by the State Highway Agency.