US Bridges

US321 Nbl over SR1933

Fair

Caldwell County, North Carolina · .1 MI.S.JCT.SR1164 · Structure no. 000000000270369

Built
1989
36 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
196 ft
4 main spans
Daily traffic
15,750
2022 count
Owner
State
State Highway Agency

About this bridge

US321 Nbl over SR1933 is a prestressed concrete stringer/multi-beam or girder carrying US321 Nbl over SR1933 in Caldwell County, North Carolina. It was built in 1989, so it is 36 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 15,750 vehicles a day, roughly 12% of them trucks, projected to reach 31,500 by 2040. The structure is 196 ft (59.7 m) long and 49 ft wide.

CarriesUS321 Nbl
CrossesSR1933
Location.1 MI.S.JCT.SR1164
RouteU.S. Route 321
Coordinates35.87198, -81.50081
Functional classUrban Other Principal 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating79.9 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length196 ft (59.7 m)
Longest span75 ft (22.8 m)
Deck width49 ft (14.9 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,750 (2022)
Projected traffic31,500 by 2040
Trucks12%
Lanes on structure3
Traffic directionOne-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 US321 Nbl over SR1933 built?

It was built in 1989, making it 36 years old in 2025.

What condition is US321 Nbl over SR1933 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 February 2024.

How much traffic does US321 Nbl over SR1933 carry?

About 15,750 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US321 Nbl over SR1933?

The structure is 196 ft (59.7 m) long with a longest span of 75 ft (22.8 m) and a deck 49 ft wide.

Who owns US321 Nbl over SR1933?

It is owned by the State Highway Agency.