Structure 1570035 · Rockingham County, NC

Nc770(closed) over Mayo River

Carries Nc770(closed) over Mayo River, 1.1 Mi. W. Jct. Us220.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT271 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

271 ft end to end, longest span 53 ft: about 4 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.

Built196561 years old
Length271.0 ft82.6 m
Daily traffic2,600counted 2018
Last inspectedNovember 2024every 24 months

Location

StateNorth Carolina
CountyRockingham
Location1.1 Mi. W. Jct. Us220
CarriesNc770(closed)
CrossesMayo River
Coordinates36.47102, -79.95067

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length271.0 ft (82.6 m)
Max Span52.8 ft (16.1 m)
Deck Width33.1 ft (10.1 m)
Deck Area834.3 sq m
Main Spans5
Year Built1965

Traffic

Avg Daily Traffic2,600 (2018)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000001570035

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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