Structure 18B00025N · Calloway County, KY

Ky-121 over Clarks R. S.of Murray

Carries Ky-121 over Clarks R. S.of Murray, 1.2 Mi West Of Jct Ky 894.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT445 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

445 ft end to end, longest span 80 ft: about 6 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.

Built195670 years old
Length444.6 ft135.5 m
Daily traffic6,438counted 2023
Last inspectedMay 2023every 24 months

Location

StateKentucky
CountyCalloway
Location1.2 Mi West Of Jct Ky 894
CarriesKy-121
CrossesClarks R. S.of Murray
Coordinates36.59139, -88.30111

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length444.6 ft (135.5 m)
Max Span80.1 ft (24.4 m)
Deck Width35.4 ft (10.8 m)
Deck Area1463.4 sq m
Main Spans3
Year Built1956

Traffic

Avg Daily Traffic6,438 (2023)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical4 — Foundations need monitoring
Structure Number018B00025N

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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