Structure 1190338 · Mecklenburg County, NC

Nc16 Nbl over I77 Sbl Us21 Sbl

Carries Nc16 Nbl over I77 Sbl Us21 Sbl, 0.05 Mi. N. Jct. I77 Nbl.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT182 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

182 ft end to end, longest span 66 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.

Built197254 years old
Length181.8 ft55.4 m
Daily traffic61,500counted 2022
Last inspectedSeptember 2024every 24 months

Location

StateNorth Carolina
CountyMecklenburg
Location0.05 Mi. N. Jct. I77 Nbl
CarriesNc16 Nbl
CrossesI77 Sbl Us21 Sbl
Coordinates35.24503, -80.84746

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length181.8 ft (55.4 m)
Max Span65.9 ft (20.1 m)
Deck Width40.7 ft (12.4 m)
Deck Area687.0 sq m
Main Spans3
Year Built1972

Traffic

Avg Daily Traffic61,500 (2022)
Truck Traffic12%
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 Number000000001190338

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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