Structure 216470 · Kossuth County, IA

FM 380th ST over Union Slough Ditch

Carries FM 380th ST over Union Slough Ditch, 098281401.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating3/9 · Serious
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT44 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 6/9Substructure 3/9 · sets the rating

44 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 multi-beam bridge.

Built196462 years old
Length44.0 ft13.4 m
Daily traffic180counted 2021
Last inspectedJune 2024every 12 months

Location

StateIowa
CountyKossuth
Location098281401
CarriesFM 380th ST
CrossesUnion Slough Ditch
Coordinates43.31324, -94.11890

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length44.0 ft (13.4 m)
Max Span43.0 ft (13.1 m)
Deck Width26.2 ft (8 m)
Deck Area107.2 sq m
Main Spans1
Year Built1964

Traffic

Avg Daily Traffic180 (2021)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000216470

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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