| Select a point: Kendallville - Bluffton - Near Decorah - Decorah |
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| Upper Iowa River at Kendallville | |
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| Flood Categories | |
| Record | Not available |
| Major | 15 feet |
| Moderate | 13 feet |
| Minor / Flood Stage | 11 feet |
| Action Stage | 9 feet |
| Upper Iowa River at Bluffton | |
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|
| Flood Categories | |
| Record | 18.30 feet - 3/27/1961 |
| Major | 18 feet |
| Moderate | 16 feet |
| Minor / Flood Stage | 14 feet |
| Action Stage | 11 feet |
| Upper Iowa River near Decorah | |
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|
| Flood Categories | |
| Record | Not available |
| Major | 902 feet |
| Moderate | 898 feet |
| Minor / Flood Stage | 896 feet |
| Action Stage | 893 feet |
| Upper Iowa River at Decorah | |
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|
| Flood Categories | |
| Record | 17.90 feet - 6/6/08 |
| Major | 14 feet |
| Moderate | 13 feet |
| Minor / Flood Stage | 12 |
| Action Stage | 9 feet |
| River Levels Impacts | |
| 12 feet | Residential areas are threatened on the west edge of Decorah just before the levee protecting the town begins |
| 13 feet | Residential flooding on the west side of town is possible |
| 14 feet | Major flooding may occur outside the areas protected by the levee |
| 19.5 feet | Water may begin to overtop the protective levee |