Structure 77B00006N · Magoffin County, KY

Us-460 over Rockhouse Fork

Carries Us-460 over Rockhouse Fork, .1 Mi E Of W-jct Ky 1415.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 41 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built196561 years old
Length40.7 ft12.4 m
Daily traffic7,546counted 2022
Last inspectedJanuary 2024every 48 months

Location

StateKentucky
CountyMagoffin
Location.1 Mi E Of W-jct Ky 1415
CarriesUs-460
CrossesRockhouse Fork
Coordinates37.73278, -83.01972

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length40.7 ft (12.4 m)
Max Span19.7 ft (6 m)
Deck Width92.8 ft (28.3 m)
Deck Area350.9 sq m
Main Spans2
Year Built1965

Traffic

Avg Daily Traffic7,546 (2022)
Truck Traffic14%
Lanes On Bridge3

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number077B00006N

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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