| 26.0 | County Highway K30 north of Rock Valley is flooded. | | 22.0 | The driveway and yard of the house near the gage are flooded. | | 20.0 | Major agricultural flooding begins throughout the flood plain. | | 19.0 | Rock Valley begins to experience flood problems and sandbagging of storm sewers in the city begins. | | 16.0 | Significant amounts of agricultural lands are flooded...and some rural roads are also threatened by high water. | | 13.0 | The lowest lying pasture and farm land will experience some minor flooding. |
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1) 19.97 ft on 05/09/1993
2) 18.91 ft on 03/23/1979
3) 18.85 ft on 06/20/1983
4) 18.27 ft on 06/14/1994
5) 18.06 ft on 06/18/1984
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Low water records are unavailable.
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