Structure 1190939 · Mecklenburg County, NC

I485 Sbl over Mallard Creek

Carries I485 Sbl over Mallard Creek, 0.2 Mi. S. Jct. Us29.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT456 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

456 ft end to end, longest span 67 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.

Built199927 years old
Length455.7 ft138.9 m
Daily traffic42,750counted 2023
Last inspectedJuly 2023every 24 months

Location

StateNorth Carolina
CountyMecklenburg
Location0.2 Mi. S. Jct. Us29
CarriesI485 Sbl
CrossesMallard Creek
Coordinates35.33039, -80.71915

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length455.7 ft (138.9 m)
Max Span66.9 ft (20.4 m)
Deck Width87.6 ft (26.7 m)
Deck Area3708.6 sq m
Main Spans7
Year Built1999

Traffic

Avg Daily Traffic42,750 (2023)
Truck Traffic16%
Lanes On Bridge5

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 Number000000001190939

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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