US Bridges

NC28 Nbl over Nantahala River .&gsmr

Fair

Swain County, North Carolina · 50 FT.S.JCT.SR1121 · Structure no. 000000001730186

Built
1997
28 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
754 ft
3 main spans
Daily traffic
2,250
2022 count
Owner
State
State Highway Agency

About this bridge

NC28 Nbl over Nantahala River .&gsmr is a steel continuous stringer/multi-beam or girder carrying NC28 Nbl over Nantahala River .&gsmr in Swain County, North Carolina. It was built in 1997, so it is 28 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 2,250 vehicles a day, roughly 14% of them trucks, projected to reach 4,500 by 2040. The structure is 754 ft (229.8 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNC28 Nbl
CrossesNantahala River .&gsmr
Location50 FT.S.JCT.SR1121
RouteState Highway 28
CountySwain County
StateNorth Carolina
Coordinates35.37274, -83.56522
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.9 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20 + Mod
Structure length754 ft (229.8 m)
Longest span228 ft (69.4 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2022)
Projected traffic4,500 by 2040
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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 NC28 Nbl over Nantahala River .&gsmr built?

It was built in 1997, making it 28 years old in 2025.

What condition is NC28 Nbl over Nantahala River .&gsmr 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 2023.

How much traffic does NC28 Nbl over Nantahala River .&gsmr carry?

About 2,250 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is NC28 Nbl over Nantahala River .&gsmr?

The structure is 754 ft (229.8 m) long with a longest span of 228 ft (69.4 m) and a deck 37 ft wide.

Who owns NC28 Nbl over Nantahala River .&gsmr?

It is owned by the State Highway Agency.