Structure 84C00010N · Mercer County, KY

Johnson RD over Johnson Creek

Carries Johnson RD over Johnson Creek, 1 Mi S Of Jct Ky 1989.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

29 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 box-beam bridge.

Built197551 years old
Length28.9 ft8.8 m
Daily traffic77counted 2022
Last inspectedJuly 2022every 48 months

Location

StateKentucky
CountyMercer
Location1 Mi S Of Jct Ky 1989
CarriesJohnson RD
CrossesJohnson Creek
Coordinates37.77417, -84.95556

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length28.9 ft (8.8 m)
Max Span26.2 ft (8 m)
Deck Width24.3 ft (7.4 m)
Deck Area65.1 sq m
Main Spans1
Year Built1975

Traffic

Avg Daily Traffic77 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2022
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number084C00010N

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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