US Bridges

US421 Sbl over SR2402

Good

Wilkes County, North Carolina · .4 MI.S.JCT.SR2303 · Structure no. 000000001930767

Built
2004
21 years old
Condition
Good
inspected March 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
128 ft
1 main span
Daily traffic
7,000
2014 count
Owner
State
State Highway Agency

About this bridge

US421 Sbl over SR2402 is a steel stringer/multi-beam or girder carrying US421 Sbl over SR2402 in Wilkes County, North Carolina. It was built in 2004, so it is 21 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 7,000 vehicles a day, roughly 14% of them trucks, projected to reach 14,000 by 2040. The structure is 128 ft (39 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS421 Sbl
CrossesSR2402
Location.4 MI.S.JCT.SR2303
RouteU.S. Route 421
Coordinates36.14242, -80.89451
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length128 ft (39 m)
Longest span126 ft (38.4 m)
Deck width48 ft (14.7 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2014)
Projected traffic14,000 by 2040
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US421 Sbl over SR2402 built?

It was built in 2004, making it 21 years old in 2025.

What condition is US421 Sbl over SR2402 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 March 2021.

How much traffic does US421 Sbl over SR2402 carry?

About 7,000 vehicles per day (2014 count), of which roughly 14% are trucks.

How long is US421 Sbl over SR2402?

The structure is 128 ft (39 m) long with a longest span of 126 ft (38.4 m) and a deck 48 ft wide.

Who owns US421 Sbl over SR2402?

It is owned by the State Highway Agency.