US Bridges

US701N NC410N over Grissett Swamp

Fair

Columbus County, North Carolina · 0.2 MI.S.JCT.SR1151 · Structure no. 000000000470371

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
15,000
2021 count
Owner
State
State Highway Agency

About this bridge

US701N NC410N over Grissett Swamp is a concrete continuous culvert carrying US701N NC410N over Grissett Swamp in Columbus County, North Carolina. It was built in 1957, so it is 68 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 15,000 vehicles a day, roughly 8% of them trucks, projected to reach 30,000 by 2040. The structure is 33 ft (10 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUS701N NC410N
CrossesGrissett Swamp
Location0.2 MI.S.JCT.SR1151
RouteU.S. Route 7
CountyColumbus County
StateNorth Carolina
Coordinates34.15743, -78.85677
Functional classRural Minor 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 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 inspectionJuly 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 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 spans3
Design loadHS 20 + Mod
Structure length33 ft (10 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 traffic15,000 (2021)
Projected traffic30,000 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US701N NC410N over Grissett Swamp built?

It was built in 1957, making it 68 years old in 2025.

What condition is US701N NC410N over Grissett Swamp 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 July 2023.

How much traffic does US701N NC410N over Grissett Swamp carry?

About 15,000 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is US701N NC410N over Grissett Swamp?

The structure is 33 ft (10 m) long with a longest span of 10 ft (3 m).

Who owns US701N NC410N over Grissett Swamp?

It is owned by the State Highway Agency.