Structure 670196 · Forsyth County, NC

Sr1160 over Us421

Carries Sr1160 over Us421, 100 Ft. N. Jct. Sr1161.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT241 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

241 ft end to end, longest span 59 ft: about 3 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.

Built195967 years old
Length240.8 ft73.4 m
Daily traffic2,300counted 2022
Last inspectedSeptember 2024every 24 months

Location

StateNorth Carolina
CountyForsyth
Location100 Ft. N. Jct. Sr1161
CarriesSr1160
CrossesUs421
Coordinates36.08181, -80.40453

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length240.8 ft (73.4 m)
Max Span58.7 ft (17.9 m)
Deck Width32.8 ft (10 m)
Deck Area734 sq m
Main Spans4
Year Built1959

Traffic

Avg Daily Traffic2,300 (2022)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000670196

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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