US Bridges

US421 over Williams Old Mill Branch

Fair

Sampson County, North Carolina · 0.2 Mi. S. of Jct. SR1839 · Structure no. 000000001630387

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
25 ft
3 main spans
Daily traffic
7,500
2021 count
Owner
State
State Highway Agency

About this bridge

US421 over Williams Old Mill Branch is a concrete continuous culvert carrying US421 over Williams Old Mill Branch in Sampson County, North Carolina. It was built in 1977, so it is 48 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 7,500 vehicles a day, roughly 12% of them trucks, projected to reach 15,000 by 2040. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS421
CrossesWilliams Old Mill Branch
Location0.2 Mi. S. of Jct. SR1839
RouteU.S. Route 421
CountySampson County
StateNorth Carolina
Coordinates35.00825, -78.34114
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2021)
Projected traffic15,000 by 2040
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 US421 over Williams Old Mill Branch built?

It was built in 1977, making it 48 years old in 2025.

What condition is US421 over Williams Old Mill Branch 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 October 2023.

How much traffic does US421 over Williams Old Mill Branch carry?

About 7,500 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is US421 over Williams Old Mill Branch?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m).

Who owns US421 over Williams Old Mill Branch?

It is owned by the State Highway Agency.