Structure 14651 · Jasper County, MO

Walnut ST over Mna Rr

Carries Walnut ST over Mna Rr, S 4 T 28 N R 31 W.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 2 of 9.

How ratings work
Deck4/9 · Poor
Superstructure4/9 · Poor
Substructuresets the rating2/9 · Critical
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT56 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 2/9 · sets the rating

56 ft end to end, longest span 19 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1920106 years old
Length56.1 ft17.1 m
Daily traffic200counted 2023
Last inspectedFebruary 2019every 24 months

Location

StateMissouri
CountyJasper
LocationS 4 T 28 N R 31 W
CarriesWalnut ST
CrossesMna Rr
Coordinates37.17511, -94.31847

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length56.1 ft (17.1 m)
Max Span19.0 ft (5.8 m)
Deck Width28.2 ft (8.6 m)
Deck Area147.1 sq m
Main Spans3
Year Built1920

Traffic

Avg Daily Traffic200 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2019
Inspection FrequencyEvery 24 months
OwnerRailroad
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number14651

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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