US Bridges

US21 over NC150

Fair

Iredell County, North Carolina · 0.71 Mi. N. Jct. SR 1100 · Structure no. 000000000970018

Built
1995
30 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
3 main spans
Daily traffic
19,000
2021 count
Owner
State
State Highway Agency

About this bridge

US21 over NC150 is a steel stringer/multi-beam or girder carrying US21 over NC150 in Iredell County, North Carolina. It was built in 1995, so it is 30 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 19,000 vehicles a day, roughly 6% of them trucks, projected to reach 38,000 by 2040. The structure is 148 ft (45.1 m) long and 33 ft wide.

CarriesUS21
CrossesNC150
Location0.71 Mi. N. Jct. SR 1100
RouteU.S. Route 21
Coordinates35.58901, -80.83791
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span84 ft (25.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2021)
Projected traffic38,000 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US21 over NC150 built?

It was built in 1995, making it 30 years old in 2025.

What condition is US21 over NC150 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 January 2024.

How much traffic does US21 over NC150 carry?

About 19,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is US21 over NC150?

The structure is 148 ft (45.1 m) long with a longest span of 84 ft (25.6 m) and a deck 33 ft wide.

Who owns US21 over NC150?

It is owned by the State Highway Agency.