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Ramsey County | Multi-Jurisdiction Hazard Mitigation Plan 22 • Impact on the Public • Impact on Responders • Impact on Continuity of Operations • Impact on Property, Facilities, and Infrastructure • Impact on the Environment • Impact on the Economy of the Jurisdiction • Impact on Public Confidence in the Jurisdiction's Governance 3.4 Hazard Rankings Each hazard was given a ranking based on three key elements of risk – threat, vulnerability and consequence. Hazard Threat Vulnerability Consequence Score Hazard Rank Dam/Levee Failure Rare – 1 Localized - 2 Limited – 2 5 Medium Drought Occasional – 2 Extensive – 4 Limited – 2 8 Medium Floods Frequent – 3 Localized – 2 Critical – 3 8 Medium Geologic Hazards Occasional – 2 Limited – 1 Negligible – 1 4 Low Hazardous Materials Occasional – 2 Limited – 1 Limited - 2 5 Medium Summer Weather Hazards Likely – 4 Widespread – 3 Limited – 2 9 High Tornado and Windstorm Frequent – 3 Widespread – 3 Catastrophic – 4 10 High Winter Weather Hazards Likely – 4 Widespread – 3 Limited – 2 9 High Human-Caused Hazards Rare – 1 Limited – 1 Catastrophic – 4 6 Medium Infrastructure Failure Rare – 1 Limited – 1 Catastrophic - 4 6 Medium 3.5 Dam/Levee Failure 3.5.1 PROFILE Dams are structures built across a river, stream, or other body of water designed to control and manage water flow. Dams create reservoirs, which can supply water for domestic, agricultural, and industrial use, manage water resources, and provide recreational opportunities. Levees are an embankment or natural ridge constructed along the edges of a river or other body of water to prevent flooding of the adjacent land. Levees serve to protect populated areas, agricultural lands, and infrastructure from