Structure 24C00046N · Christian County, KY

John Rivers RD over Rock Bridge Branch

Carries John Rivers RD over Rock Bridge Branch, 0.6 M. S. Of Ky 109.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9Substructure 6/9 · sets the rating

26 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.

Built197947 years old
Length25.9 ft7.9 m
Daily traffic246counted 2010
Last inspectedAugust 2021every 48 months

Location

StateKentucky
CountyChristian
Location0.6 M. S. Of Ky 109
CarriesJohn Rivers RD
CrossesRock Bridge Branch
Coordinates36.79389, -87.44028

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length25.9 ft (7.9 m)
Max Span25.9 ft (7.9 m)
Deck Width24.3 ft (7.4 m)
Deck Area58.5 sq m
Main Spans1
Year Built1979

Traffic

Avg Daily Traffic246 (2010)
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2021
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number024C00046N

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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