Structure 570109 · Davidson County, NC

Nc109 over I85bus.lp Us29 Us70

Carries Nc109 over I85bus.lp Us29 Us70, 0.3 Mi. N. Jct. Sr2051.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT177 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

177 ft end to end, longest span 87 ft: about 2 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.

Built200323 years old
Length176.8 ft53.9 m
Daily traffic6,250counted 2021
Last inspectedJune 2023every 24 months

Location

StateNorth Carolina
CountyDavidson
Location0.3 Mi. N. Jct. Sr2051
CarriesNc109
CrossesI85bus.lp Us29 Us70
Coordinates35.90159, -80.09267

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length176.8 ft (53.9 m)
Max Span86.9 ft (26.5 m)
Deck Width102.0 ft (31.1 m)
Deck Area1676.3 sq m
Main Spans2
Year Built2003

Traffic

Avg Daily Traffic6,250 (2021)
Truck Traffic12%
Lanes On Bridge7
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000570109

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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