Structure 18812 · Perry County, MO

County RD 422 over Indian CR

Carries County RD 422 over Indian CR, S 26 T 34 N R 12 E.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT75 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

75 ft end to end, longest span 9 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 slab bridge.

Built193789 years old
Length75.1 ft22.9 m
Daily traffic35counted 2023
Last inspectedJanuary 2025every 24 months

Location

StateMissouri
CountyPerry
LocationS 26 T 34 N R 12 E
CarriesCounty RD 422
CrossesIndian CR
Coordinates37.62285, -89.67993

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length75.1 ft (22.9 m)
Max Span8.9 ft (2.7 m)
Deck Width16.1 ft (4.9 m)
Deck Area112.2 sq m
Main Spans8
Year Built1937

Traffic

Avg Daily Traffic35 (2023)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number18812

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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