US421 over Great Coharie Swamp
PoorSampson County, North Carolina · 0.6 MI.N.JCT.SR1842 · Structure no. 000000001630010
- Built
- 1920
- 105 years old, rebuilt 1955
- Condition
- Poor
- inspected July 2024
- Type
- Tee Beam
- Concrete
- Length
- 72 ft
- 2 main spans
- Daily traffic
- 7,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US421 over Great Coharie Swamp is a concrete tee beam carrying US421 over Great Coharie Swamp in Sampson County, North Carolina. It was built in 1920 and reconstructed in 1955, so it is 105 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 7,000 vehicles a day, roughly 14% of them trucks, projected to reach 14,000 by 2040. The structure is 72 ft (21.9 m) long and 33 ft wide. If it were closed, the detour would be 2.5 mi (4 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 over Great Coharie Swamp built?
It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1955.
What condition is US421 over Great Coharie Swamp in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.
How much traffic does US421 over Great Coharie Swamp carry?
About 7,000 vehicles per day (2021 count), of which roughly 14% are trucks.
How long is US421 over Great Coharie Swamp?
The structure is 72 ft (21.9 m) long with a longest span of 34 ft (10.3 m) and a deck 33 ft wide.
Who owns US421 over Great Coharie Swamp?
It is owned by the State Highway Agency.