Structure 60B00009N · Knott County, KY

Ky-550 over Jones Fork

Carries Ky-550 over Jones Fork, .15 Mi S Of Jct Ky 1087.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

106 ft end to end, longest span 50 ft. 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 tee-beam bridge.

Built1932rebuilt 1953
Length106.0 ft32.3 m
Daily traffic961counted 2021
Last inspectedJune 2023every 24 months

Location

StateKentucky
CountyKnott
Location.15 Mi S Of Jct Ky 1087
CarriesKy-550
CrossesJones Fork
Coordinates37.41694, -82.87833

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length106.0 ft (32.3 m)
Max Span49.9 ft (15.2 m)
Deck Width20.3 ft (6.2 m)
Deck Area200.3 sq m
Main Spans2
Year Built1932 (reconstructed 1953)

Traffic

Avg Daily Traffic961 (2021)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number060B00009N

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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