Structure 59B00072N · Kenton County, KY

I-75 Ramp over Ramp Donaldson To I-75

Carries I-75 Ramp over Ramp Donaldson To I-75, Rmp E-nb I75 To I275 E&w.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT108 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

108 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built197749 years old
Length107.9 ft32.9 m
Daily traffic—reported figure implausible
Last inspectedOctober 2023every 48 months

Location

StateKentucky
CountyKenton
LocationRmp E-nb I75 To I275 E&w
CarriesI-75 Ramp
CrossesRamp Donaldson To I-75
Coordinates39.03167, -84.60528

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length107.9 ft (32.9 m)
Max Span104.0 ft (31.7 m)
Deck Width62.7 ft (19.1 m)
Deck Area628.4 sq m
Main Spans1
Year Built1977

Traffic

Avg Daily Traffic196,929 (2023)
That is about 65,643 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic15%
Lanes On Bridge3
Lanes Under Bridge1

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number059B00072N

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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