RIVER GAUGE · NISHNABOTNA RIVER
Nishnabotna River above Hamburg
Fremont County, Iowa
Water level20.88 ft
Flow11,300 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action23 ft
Minor flood25 ft
Moderate flood27.5 ft
Major flood33 ft
The past week
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What floods at each level
- 39 ft
Water reaches the bottom of the J64 bridge at the gage site.
- 33 ft
The top of the levee near the bridge in town is overtopped with flood waters. I-29 is closed south of town.
- 27.5 ft
State Highway 275 south of the gage may be threatened in several spots.
- 25 ft
More extensive lowland flooding begins as the parking lot near the gauge begins to experience flooding. In addition, some local farm levees may be overtopped with flood waters.
- 23 ft
Minor overflows begin within the city limits, however there is no threat to property at this stage.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 16, 1998 | 33.18 ft | 65,100 cfs |
| May 7, 2007 | 32.44 ft | 55,300 cfs |
| Mar 15, 2019 | 31.07 ft | 39,000 cfs |
Get an alert when Nishnabotna River rises
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