US Bridges

NC18 over Mallberry Creek

Fair

Wilkes County, North Carolina · 25 FT.S.JCT.SR1722 · Structure no. 000000001930742

Built
1960
65 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
57 ft
5 main spans
Daily traffic
2,200
2018 count
Owner
State
State Highway Agency

About this bridge

NC18 over Mallberry Creek is a concrete continuous culvert carrying NC18 over Mallberry Creek in Wilkes County, North Carolina. It was built in 1960, so it is 65 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 fair condition with a lowest component rating of 5 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 2,200 vehicles a day, roughly 7% of them trucks, projected to reach 4,400 by 2040. The structure is 57 ft (17.3 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesNC18
CrossesMallberry Creek
Location25 FT.S.JCT.SR1722
RouteState Highway 18
CountyWilkes County
StateNorth Carolina
Coordinates36.27334, -81.19519
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20 + Mod
Structure length57 ft (17.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2018)
Projected traffic4,400 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NC18 over Mallberry Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is NC18 over Mallberry Creek 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 December 2024.

How much traffic does NC18 over Mallberry Creek carry?

About 2,200 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is NC18 over Mallberry Creek?

The structure is 57 ft (17.3 m) long with a longest span of 10 ft (3 m).

Who owns NC18 over Mallberry Creek?

It is owned by the State Highway Agency.