Structure 1B00078N · Adair County, KY

Ky-704 over Unnamed Stream

Carries Ky-704 over Unnamed Stream, .85 Mi S. Jct Ky 55.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

53 ft end to end, longest span 18 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 slab bridge.

Built1940rebuilt 2019
Length53.1 ft16.2 m
Daily traffic1,174counted 2021
Last inspectedJuly 2021every 48 months

Location

StateKentucky
CountyAdair
Location.85 Mi S. Jct Ky 55
CarriesKy-704
CrossesUnnamed Stream
Coordinates37.06778, -85.30583

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length53.1 ft (16.2 m)
Max Span17.7 ft (5.4 m)
Deck Width26.2 ft (8 m)
Deck Area129.6 sq m
Main Spans3
Year Built1940 (reconstructed 2019)

Traffic

Avg Daily Traffic1,174 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number001B00078N

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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