Structure 48B00147N · Harlan County, KY

Ky-3451 over Cumberland River

Carries Ky-3451 over Cumberland River, .1 Mi S Of Jct US 119.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT372 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

372 ft end to end, longest span 150 ft: about 5 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 girder bridge.

Built197353 years old
Length372.0 ft113.4 m
Daily traffic243counted 2023
Last inspectedMay 2023every 24 months

Location

StateKentucky
CountyHarlan
Location.1 Mi S Of Jct US 119
CarriesKy-3451
CrossesCumberland River
Coordinates36.84139, -83.37722

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length372.0 ft (113.4 m)
Max Span149.9 ft (45.7 m)
Deck Width23.3 ft (7.1 m)
Deck Area805.1 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic243 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number048B00147N

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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