US Bridges

US421B over Reddies River

Poor

Wilkes County, North Carolina · 0.25 Mi. E. Jct. SR1500 · Structure no. 000000001930012

Built
1935
90 years old, rebuilt 1967
Condition
Poor
inspected April 2023
Type
Tee Beam
Concrete
Length
285 ft
6 main spans
Daily traffic
18,000
2021 count
Owner
State
State Highway Agency

About this bridge

US421B over Reddies River is a concrete tee beam carrying US421B over Reddies River in Wilkes County, North Carolina. It was built in 1935 and reconstructed in 1967, so it is 90 years old, older than the North Carolina average of 38.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,000 vehicles a day, roughly 6% of them trucks, projected to reach 36,000 by 2040. The structure is 285 ft (86.8 m) long and 61 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS421B
CrossesReddies River
Location0.25 Mi. E. Jct. SR1500
RouteU.S. Route 421
Coordinates36.15926, -81.15386
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length285 ft (86.8 m)
Longest span46 ft (14 m)
Deck width61 ft (18.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2021)
Projected traffic36,000 by 2040
Trucks6%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US421B over Reddies River built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1967.

What condition is US421B over Reddies River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does US421B over Reddies River carry?

About 18,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is US421B over Reddies River?

The structure is 285 ft (86.8 m) long with a longest span of 46 ft (14 m) and a deck 61 ft wide.

Who owns US421B over Reddies River?

It is owned by the State Highway Agency.