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History The winter season in the counties can begin as early as September and last into May, however the typical storm period is from late November until early April. The counties generally experience at least one blizzard per year as well as several less severe winter storms, which hinder cities, businesses, and daily life in general. Ice storms are not as frequent, but when they do occur, they place a drastic impact upon area transportation systems, trees and power lines. Historical records indicate numerous winter weather occurrences throughout the past century. In the past thre decades, Minnehaha and Lincoln Counties, including the City of Sioux Falls, have experienced several winter storms that not only caused property damages but injury and death as well. Risk Probability is high during the months of November through April. A winter storm’s average duration lasts between 48 and 72 hours. Specific Risks          

Blocked roads due to heavy snow, ground drifting, or stalled vehicles Building collapses due to excessive snow build-up on roofs Business interruptions ranging from a loss of power to blocked roads Delayed emergency response when roads become blocked or there is a loss of communications Downed power lines and trees from ice build-up and high winds Loss of power from weather related conditions such as ice buildup and high winds Damage to property in the form of ice and snow buildup on roofs to building freeze-up from loss of power Damage to property in the form of livestock casualties from exposure Possible school closures generally because of their effects on students by adverse weather conditions or because of power outages Wind chill exposure risks for people, pets, livestock, and wildlife

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2016 Standards of Cover Manual  
2016 Standards of Cover Manual