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Eugene -Springfield Area Natural Hazards Mitigation Plan <br />5. Annexes <br />A.4 Hazard Risk Ranking <br />Table A-4 presents the ranking of hazards of concern, using vulnerability multiplied by <br />probability divided by capacity to calculate and prioritize total risk to Eugene Water <br />and Electric Board (see Section 4.2.2, Components of Risk Analysis, for an explanation <br />of the Risk Metrics). These are the identified hazards to EWEB and may vary from <br />those listed in Section 1, Table 1-1. <br />Table A-4 EWEB Risk Matrix <br />Hazard <br />Vulnerability <br />Prob ility <br />Capacity <br />Risk Total <br />Risk <br />High = 3 <br />High = 3 <br />High Capacity = 3 <br /><1.5 = Low <br />Moderate = 2 <br />Moderate = 2 <br />Moderate = 2 <br />1.5-2.9 = Moderate <br />Low = 1 <br />Low = 1 <br />Low--1 <br />= High1 <br />>4.5 = Very High <br />Earthquake <br />3 <br />2 <br />1 <br />6 <br />Very High <br />Windstorm <br />3 <br />3 <br />2 <br />4.5 <br />High <br />Winter storm <br />3 <br />3 <br />2 <br />4.5 <br />High <br />Wildfire <br />2 <br />3 <br />2 <br />3 <br />High <br />Flood - <br />2 <br />2 <br />2 <br />2 <br />Moderate <br />iverine <br />Drought <br />1 <br />3 <br />2 <br />1.5 <br />Moderate <br />Geomagnetic <br />1 <br />2 <br />2 <br />1 <br />Low <br />Disturbance <br />Landslide <br />1 <br />2 <br />2 <br />1 <br />Low <br />Volcano <br />1 <br />1 <br />3 <br />.33 <br />Low <br />Source EWEB. <br />As Table A-4 above indicates, EWEB's risk ranking is nearly identical to the planning <br />area. The one exception is geomagnetic disturbances, which ranked low in EWEB's <br />evaluation. As a local utility, EWEB manages relatively little electric transmission <br />infrastructure, which is most sensitive to this phenomena therefore our asset <br />vulnerability is comparatively small. Further, events of this nature are managed <br />proactively by the Bonneville Power Administration which has protocols and actions <br />EWEB would take to shed electric load in advance of a predicted event and <br />5-14 January 2020 <br />