Structure 850023 · Harnett County, NC

Us421 Nbl over Dunn Erwin Rail Trail

Carries Us421 Nbl over Dunn Erwin Rail Trail, 0.9 Mi.s.jct.nc55.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT112 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

112 ft end to end, longest span 21 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built195769 years old
Length111.9 ft34.1 m
Daily traffic6,250counted 2019
Last inspectedFebruary 2025every 24 months

Location

StateNorth Carolina
CountyHarnett
Location0.9 Mi.s.jct.nc55
CarriesUs421 Nbl
CrossesDunn Erwin Rail Trail
Coordinates35.32963, -78.66268

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length111.9 ft (34.1 m)
Max Span21.0 ft (6.4 m)
Deck Width33.1 ft (10.1 m)
Deck Area344.4 sq m
Main Spans5
Year Built1957

Traffic

Avg Daily Traffic6,250 (2019)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000850023

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges