US Bridges

NC18 over Mulberry Creek

Fair

Wilkes County, North Carolina · 100 FT.S.JCT.SR1573 · Structure no. 000000001930744

Built
1960
65 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
59 ft
4 main spans
Daily traffic
1,300
2022 count
Owner
State
State Highway Agency

About this bridge

NC18 over Mulberry Creek is a concrete continuous culvert carrying NC18 over Mulberry 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 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 1,300 vehicles a day, roughly 7% of them trucks, projected to reach 2,600 by 2040. The structure is 59 ft (17.9 m) long. If it were closed, the detour would be 14.9 mi (24 km).

CarriesNC18
CrossesMulberry Creek
Location100 FT.S.JCT.SR1573
RouteState Highway 18
Coordinates36.29661, -81.21012
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 spans4
Design loadHS 20 + Mod
Structure length59 ft (17.9 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 traffic1,300 (2022)
Projected traffic2,600 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 Mulberry Creek built?

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

What condition is NC18 over Mulberry 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 Mulberry Creek carry?

About 1,300 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is NC18 over Mulberry Creek?

The structure is 59 ft (17.9 m) long with a longest span of 10 ft (3 m).

Who owns NC18 over Mulberry Creek?

It is owned by the State Highway Agency.