US Bridges

I587 over Toisnet Swamp

Good

Wilson County, North Carolina · 0.7 Mi. E. Jct. NC58 · Structure no. 000000001950226

Built
1985
40 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
67 ft
4 main spans
Daily traffic
22,500
2022 count
Owner
State
State Highway Agency

About this bridge

I587 over Toisnet Swamp is a concrete continuous culvert carrying I587 over Toisnet Swamp in Wilson County, North Carolina. It was built in 1985, so it is 40 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,500 vehicles a day, roughly 23% of them trucks, projected to reach 45,000 by 2040. The structure is 67 ft (20.4 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI587
CrossesToisnet Swamp
Location0.7 Mi. E. Jct. NC58
RouteInterstate 587
Coordinates35.67892, -77.8473
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating58 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length67 ft (20.4 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2022)
Projected traffic45,000 by 2040
Trucks23%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 I587 over Toisnet Swamp built?

It was built in 1985, making it 40 years old in 2025.

What condition is I587 over Toisnet Swamp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does I587 over Toisnet Swamp carry?

About 22,500 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is I587 over Toisnet Swamp?

The structure is 67 ft (20.4 m) long with a longest span of 14 ft (4.2 m).

Who owns I587 over Toisnet Swamp?

It is owned by the State Highway Agency.