Structure 19B00047N · Campbell County, KY

I-275 over Ky 9

Carries I-275 over Ky 9, WB Off Ramp Over&to Ky 9.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT270 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

270 ft end to end, longest span 77 ft: about 4 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.

Built197155 years old
Length270.3 ft82.4 m
Daily traffic—reported figure implausible
Last inspectedAugust 2023every 48 months

Location

StateKentucky
CountyCampbell
LocationWB Off Ramp Over&to Ky 9
CarriesI-275
CrossesKy 9
Coordinates39.02417, -84.48083

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length270.3 ft (82.4 m)
Max Span77.4 ft (23.6 m)
Deck Width28.5 ft (8.7 m)
Deck Area716.9 sq m
Main Spans4
Year Built1971

Traffic

Avg Daily Traffic100,416 (2023)
That is about 100,416 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 Traffic8%
Lanes On Bridge1
Lanes Under Bridge5

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number019B00047N

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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