Structure 118B00010N · Whitley County, KY

Ky-511 over I-75 @ 18.970

Carries Ky-511 over I-75 @ 18.970, .80 Mi W Of Jct Ky 836.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT257 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

257 ft end to end, longest span 73 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 tee-beam bridge.

Built196759 years old
Length256.9 ft78.3 m
Daily traffic389counted 2021
Last inspectedMarch 2023every 48 months

Location

StateKentucky
CountyWhitley
Location.80 Mi W Of Jct Ky 836
CarriesKy-511
CrossesI-75 @ 18.970
Coordinates36.84306, -84.16083

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length256.9 ft (78.3 m)
Max Span73.2 ft (22.3 m)
Deck Width29.9 ft (9.1 m)
Deck Area712.5 sq m
Main Spans4
Year Built1967

Traffic

Avg Daily Traffic389 (2021)
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number118B00010N

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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