Laserfiche WebLink
Ramsey County Multi-Hazard Mitigation Plan, 2018 <br /> <br />Page | 33 <br /> <br />potential amount of damage that could be caused by each hazard event. A summary of Calculated <br />Priority Risk Index (CPRI) categories and risk levels is shown in Table 9. <br />Definitions of CPRI Categories <br />Probability – a guide to predict how often a random event will occur. Annual probabilities are <br />expressed between 0.001 or less (low) up to 1 (high). An annual probability of 1 predicts that a natural <br />hazard will occur at least once per year. <br />Magnitude/Severity – indicates the impact to a community through potential fatalities, injuries, <br />property losses, and/or losses of services. The vulnerability assessment gives information that is helpful <br />in making this determination for each community. <br />Warning Time – plays a factor in the ability to prepare for a potential disaster and to warn the public. <br />The assumption is that more warning time allows for more emergency preparations and public <br />information. <br />Duration – relates to the actual amount of time that an incident may take place over time. <br />Table 9. Summary of Calculated Priority Risk Index (CPRI) Categories and Risk Levels <br />CPRI <br />Category <br />DEGREE OF RISK Assigned <br />Weighting <br />Factor Level ID Description Index <br />Value Probability Unlikely <br />Extremely rare with no documented history of <br />occurrences or events. Annual probability of less than <br />0.001 <br />1 <br /> <br /> <br /> <br /> <br />45% Possible <br />Rare occurrences with at least one documented or <br />anecdotal historic event. Annual probability that is <br />between 0.01 and 0.001. <br /> <br />2 <br />Likely <br />Occasional occurrences with at least two or more <br />documented historic events. Annual probability that is <br />between 0.1 and 0.01. <br /> <br />3 <br />Highly Likely Frequent events with a well-documented history of <br />occurrence. Annual probability that is greater than 0.1. 4 Magnitude/Severity Negligible <br />Negligible property damages (less than 5% of critical and <br />non-critical facilities and infrastructure). <br />Injuries or illnesses are treatable with first aid and there <br />are no deaths. Negligible quality of life lost. Shutdown of <br />critical facilities for less than 24 hours. <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />30% <br />Limited <br />Slight property damages (greater than 5% and less than <br />25% of critical and non-critical facilities and infrastructure). <br />Injuries or illnesses do not result in permanent disability <br />and there are no deaths. Moderate quality of life lost. Shut <br />down of critical facilities for more than 1 day and less than <br />1 week. <br /> <br /> <br />2 <br />Critical <br />Moderate property damages (greater than 25% and less <br />than 50% of critical and non-critical facilities and <br />infrastructure). Injuries or illnesses result in permanent <br />disability and at least one death. Shut down of critical <br />facilities for more than 1 week and less than 1 month. <br />3 <br />Catastrophic <br />Severe property damages (greater than 50% of critical and <br />non-critical facilities and infrastructure). Injuries or <br />illnesses result in permanent disability and multiple deaths. <br />Shut down of critical facilities for more than 1 month. <br /> <br /> <br />4