Structure 1190300 · Mecklenburg County, NC

I77 over Irwin Creek

Carries I77 over Irwin Creek, 2.4 Mi. N. Jct. Nc16.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 29 ft across with 2 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built1957rebuilt 1971
Length28.9 ft8.8 m
Daily traffic148,000counted 2022
Last inspectedAugust 2024every 24 months

Location

StateNorth Carolina
CountyMecklenburg
Location2.4 Mi. N. Jct. Nc16
CarriesI77
CrossesIrwin Creek
Coordinates35.27202, -80.84672

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length28.9 ft (8.8 m)
Max Span9.8 ft (3 m)
Deck Area388.1 sq m
Main Spans2
Year Built1957 (reconstructed 1971)

Traffic

Avg Daily Traffic148,000 (2022)
Truck Traffic16%
Lanes On Bridge7

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000001190300

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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