US Bridges

US421 Sbl over US601

Fair

Yadkin County, North Carolina · 1.14 MI.N.JCT.SR1765 · Structure no. 000000001970200

Built
1991
34 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
3 main spans
Daily traffic
9,500
2021 count
Owner
State
State Highway Agency

About this bridge

US421 Sbl over US601 is a steel stringer/multi-beam or girder carrying US421 Sbl over US601 in Yadkin County, North Carolina. It was built in 1991, so it is 34 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 9,500 vehicles a day, roughly 14% of them trucks, projected to reach 19,000 by 2040. The structure is 163 ft (49.6 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesUS421 Sbl
CrossesUS601
Location1.14 MI.N.JCT.SR1765
RouteU.S. Route 421
CountyYadkin County
StateNorth Carolina
Coordinates36.11898, -80.66013
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating40.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length163 ft (49.6 m)
Longest span91 ft (27.7 m)
Deck width41 ft (12.5 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2021)
Projected traffic19,000 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US421 Sbl over US601 built?

It was built in 1991, making it 34 years old in 2025.

What condition is US421 Sbl over US601 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 May 2023.

How much traffic does US421 Sbl over US601 carry?

About 9,500 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is US421 Sbl over US601?

The structure is 163 ft (49.6 m) long with a longest span of 91 ft (27.7 m) and a deck 41 ft wide.

Who owns US421 Sbl over US601?

It is owned by the State Highway Agency.