US Bridges

SR2121 over Gum Swamp

Fair

Robeson County, North Carolina · 0.5 MI W. of JCT SR2116 · Structure no. 000000001550071

Built
1990
35 years old
Condition
Fair
inspected February 2024
Type
Slab
Prestressed Concrete
Length
97 ft
3 main spans
Daily traffic
150
2022 count
Owner
State
State Highway Agency

About this bridge

SR2121 over Gum Swamp is a prestressed concrete slab carrying SR2121 over Gum Swamp in Robeson County, North Carolina. It was built in 1990, so it is 35 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 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 150 vehicles a day, roughly 6% of them trucks, projected to reach 300 by 2040. The structure is 97 ft (29.5 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR2121
CrossesGum Swamp
Location0.5 MI W. of JCT SR2116
RouteState Highway 2121
CountyRobeson County
StateNorth Carolina
Coordinates34.50833, -78.90705
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating65.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length97 ft (29.5 m)
Longest span34 ft (10.3 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic300 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 SR2121 over Gum Swamp built?

It was built in 1990, making it 35 years old in 2025.

What condition is SR2121 over Gum Swamp 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 February 2024.

How much traffic does SR2121 over Gum Swamp carry?

About 150 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR2121 over Gum Swamp?

The structure is 97 ft (29.5 m) long with a longest span of 34 ft (10.3 m) and a deck 27 ft wide.

Who owns SR2121 over Gum Swamp?

It is owned by the State Highway Agency.