Structure 13851 · Jackson County, MO

Atherton-sibley over Br Of Lit Blue Rvr

Carries Atherton-sibley over Br Of Lit Blue Rvr, S 30 T 51 N R 30 W.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 25 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built194086 years old
Length24.9 ft7.6 m
Daily traffic320counted 2024
Last inspectedMarch 2023every 24 months

Location

StateMissouri
CountyJackson
LocationS 30 T 51 N R 30 W
CarriesAtherton-sibley
CrossesBr Of Lit Blue Rvr
Coordinates39.19741, -94.25156

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length24.9 ft (7.6 m)
Max Span12.1 ft (3.7 m)
Deck Area69.2 sq m
Main Spans2
Year Built1940

Traffic

Avg Daily Traffic320 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number13851

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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