Structure 80B00005N · Martin County, KY

Ky-40 over Rockcastle Creek

Carries Ky-40 over Rockcastle Creek, .05 Mi W Of Jct Ky 3 N.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT172 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

172 ft end to end, longest span 40 ft: about 2 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.

Built195373 years old
Length171.9 ft52.4 m
Daily traffic4,804counted 2020
Last inspectedAugust 2024every 12 months

Location

StateKentucky
CountyMartin
Location.05 Mi W Of Jct Ky 3 N
CarriesKy-40
CrossesRockcastle Creek
Coordinates37.86806, -82.54194

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length171.9 ft (52.4 m)
Max Span40.0 ft (12.2 m)
Deck Width33.5 ft (10.2 m)
Deck Area534.5 sq m
Main Spans4
Year Built1953

Traffic

Avg Daily Traffic4,804 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number080B00005N

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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