Structure 13211 · Nodaway County, MO

178th ST over Muddy CR

Carries 178th ST over Muddy CR, S 4 T 65 N R 37 W.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT46 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9Substructure 4/9 · sets the rating

46 ft end to end. 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 girder bridge.

Built1940rebuilt 1988
Length45.9 ft14 m
Daily traffic5counted 2024
Last inspectedDecember 2020every 24 months

Location

StateMissouri
CountyNodaway
LocationS 4 T 65 N R 37 W
Carries178th ST
CrossesMuddy CR
Coordinates40.46701, -95.06486

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length45.9 ft (14 m)
Max Span44.9 ft (13.7 m)
Deck Width15.4 ft (4.7 m)
Deck Area65.8 sq m
Main Spans1
Year Built1940 (reconstructed 1988)

Traffic

Avg Daily Traffic5 (2024)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionDecember 2020
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number13211

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.

Nearby Bridges