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Anoka County <br />MINNESOTA <br />Respectful, Innovative, Fiscally Responsible <br />Anoka County 2019 <br />Multi -Jurisdictional <br />All Hazards Mitigation Plan <br />4.2.2.2 Civil Disturbance/Strikes/Workplace Violence <br />Civil disorder is defined as any incident intended to disrupt community affairs and threaten the <br />public safety. Civil disorders include: riots mob or strike violence, and any demonstration <br />resulting in police intervention and arrests. <br />Workplace Violence is defined as employees who are exposed to the use of harassment, <br />intimidation, physical force, or the abuse of power or authority, where the intent is to control by <br />causing pain, fear or hurt. <br />4.2.2.3 Dam/Levee Failure <br />A dam/levee is a barrier constructed across a watercourse for the purpose of storage, control, or <br />diversion of water. Dams generally fall into the following categories <br />Earth Dams make up the vast majority of dams and are safe if they are properly constructed <br />and maintained. <br />Concrete Gravity Dams are designed to resist sliding and shaped to resist overturning. <br />Arch Concrete Dams are used to narrow sites and have strong abutments. <br />Gravity Arch Concrete Dams are a conservative design of the Arch. <br />Buttress Concrete Dams have a strong foundation and are resistant to sliding, overturning and <br />overflowing. <br />Stone Masonry Dams are constructed of stone or block with masonry joints. <br />Dam break floods are usually associated with intense rainfall or flood conditions. Dam failure <br />may be caused by faulty design, construction and operational inadequacies, or a flood event <br />larger than the dam design. <br />The degree and extent of damage depends on the size <br />of the dam. The greatest threat to people and property is <br />in the area immediately below the dam since flood <br />discharges decrease as the flood wave moves <br />downstream. A small dam retaining water in a stock <br />pond may result in little damage, but could result in the <br />loss of irrigation water, causing financial hardship to <br />farmers. Failure of a larger dam failure might bring about <br />considerable loss of property, destruction of cropland, <br />roads, and utilities, and loss of life. Far-reaching <br />consequences can include loss of income, disruption of <br />services, and environmental devastation. <br />4.2.2.4 Hazardous Materials Incident <br />Hazardous materials are chemical substances, when, released or misused, pose a threat to the <br />environment or health. These chemicals are used in industry, agriculture, medicine, research, <br />and consumer goods. Hazardous materials come in the form of explosives, flammable and <br />combustible substances, poisons, and radioactive materials. These substances are most often <br />released as a result of transportation or industrial accidents. <br />84 <br />