| 29.0 | Widespread major flooding occurs throughout downtown Ottawa. | | 27.0 | Flooding worsens on the south side of Ottawa, with water on several roads. Flooding also begins in other areas of Ottawa. | | 26.6 | Flood water begins to hit the bottom of the bridge at the gage site. | | 25.0 | Flooding begins along south Walnut and west Second Streets on the south side of Ottawa. | | 23.0 | Lowland flooding occurs mainly in south Ottawa. Flood water also gets into low farmlands. |
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1) 33.30 ft on 03/13/1913
2) 31.70 ft on 08/23/2007
3) 29.75 ft on 06/15/1981
4) 29.72 ft on 02/11/1959
5) 29.29 ft on 02/07/2008
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Low water records are unavailable.
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