Structure 1710021 · Surry County, NC

Us21b over Yadkin River

Carries Us21b over Yadkin River, .28 Mi.s.jct.nc268.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT400 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

400 ft end to end, longest span 78 ft: about 6 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built197155 years old
Length399.9 ft121.9 m
Daily traffic12,000counted 2021
Last inspectedJuly 2023every 24 months

Location

StateNorth Carolina
CountySurry
Location.28 Mi.s.jct.nc268
CarriesUs21b
CrossesYadkin River
Coordinates36.24088, -80.84915

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length399.9 ft (121.9 m)
Max Span77.8 ft (23.7 m)
Deck Width52.5 ft (16 m)
Deck Area1950.4 sq m
Main Spans5
Year Built1971

Traffic

Avg Daily Traffic12,000 (2021)
Truck Traffic6%
Lanes On Bridge3

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000001710021

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.

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