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CHAPTER 4. CITY OF ELLENSBURG ANNEX <br />6 <br /> <br />Table 4-1. Natural Hazard Events <br />Type of Event Date Preliminary Damage Assessment <br />Severe Flooding 05/24/17 N/A <br />Severe Flooding 03/12/17 N/A <br />Severe Flooding 02/18/16 N/A <br />Severe Flooding 02/22/12 N/A <br />Severe Flooding 5/15/11 N/A <br />Severe Flooding 03/31/11 N/A <br />Severe Flooding 3/25/11 N/A <br />Severe Flooding 01/17/11 N/A <br />Severe Flooding 01/30/09 N/A <br />Severe Flooding 01/07/09 N/A <br />Earthquake (Nisqually) 03/01/01 N/A <br />Severe Winter Storm 01/17/97 N/A <br />Severe Winter Storm/Flooding 02/09/96 N/A <br />Storms/High Winds/Floods 01/03/96 N/A <br />Flooding, Severe Storm 11/26/90 N/A <br />Severe Flooding 8/21/90 N/A <br />Severe Winter Weather 01/18/86 N/A <br />Severe Storm 12/24/80 N/A <br />Volcanic Eruption, Mt. St. Helens 05/21/80 N/A <br />Severe Storms, Flooding 12/10/77 N/A <br />Severe Storms, Flooding 12/13/75 N/A <br />Heavy Rains & Flooding 12/29/64 N/A <br /> <br /> <br />Table 4-2. Hazard Risk Ranking <br />Rank Hazard Type Risk Rating Score (Probability x Impact) <br />1 Earthquake 36 <br />2 Flood 36 <br />3 Severe Weather 36 <br />4 Dam Failure 30 <br />5 Volcano 24 <br />6 Landslide 6 <br />7 Drought 3 <br />8 Wildfire 3 <br />9 Avalanche 0 <br />10 Seiche 0 <br /> <br />