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Anoka County 2019 Multi-Jurisdictional All Hazards Mitigation Plan 84 92B4.2.2.2 Civil Disturbance/Strikes/Workplace Violence Civil disorder is defined as any incident intended to disrupt community affairs and threaten the public safety. Civil disorders include: riots mob or strike violence, and any demonstration resulting in police intervention and arrests. Workplace Violence is defined as employees who are exposed to the use of harassment, intimidation, physical force, or the abuse of power or authority, where the intent is to control by causing pain, fear or hurt. 93B4.2.2.3 Dam/Levee Failure A dam/levee is a barrier constructed across a watercourse for the purpose of storage, control, or diversion of water. Dams generally fall into the following categories Earth Dams make up the vast majority of dams and are safe if they are properly constructed and maintained. Concrete Gravity Dams are designed to resist sliding and shaped to resist overturning. Arch Concrete Dams are used to narrow sites and have strong abutments. Gravity Arch Concrete Dams are a conservative design of the Arch. Buttress Concrete Dams have a strong foundation and are resistant to sliding, overturning and overflowing. Stone Masonry Dams are constructed of stone or block with masonry joints. Dam break floods are usually associated with intense rainfall or flood conditions. Dam failure may be caused by faulty design, construction and operational inadequacies, or a flood event larger than the dam design. The degree and extent of damage depends on the size of the dam. The greatest threat to people and property is in the area immediately below the dam since flood discharges decrease as the flood wave moves downstream. A small dam retaining water in a stock pond may result in little damage, but could result in the loss of irrigation water, causing financial hardship to farmers. Failure of a larger dam failure might bring about considerable loss of property, destruction of cropland, roads, and utilities, and loss of life. Far-reaching consequences can include loss of income, disruption of services, and environmental devastation. 94B4.2.2.4 Hazardous Materials Incident Hazardous materials are chemical substances, when, released or misused, pose a threat to the environment or health. These chemicals are used in industry, agriculture, medicine, research, and consumer goods. Hazardous materials come in the form of explosives, flammable and combustible substances, poisons, and radioactive materials. These substances are most often released as a result of transportation or industrial accidents.