Resolution 7478 hazard mitigation

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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan Volume 2 — Hazard Inventory Feb. 22, 1922. Blizzard, ice and thunderstorms across Minnesota, with winds hitting 50 mph in Duluth while thunderstorms were reported in the Twin Cities. Heavy ice over southeast Minnesota with 2 inches of ice on wires near Winona. Over two inches of precipitation fell in many areas. This was also one of the largest ice storms in Wisconsin history with ice four inches in diameter on telegraph wires. One foot of ice -covered wire weighed 11 pounds. Jan. 9-10,1934. Sleet and ice storm over southwest Minnesota. Hardest hit was Slayton, Tracy, and Pipestone. The thickest ice was just east of Pipestone with ice measuring 6 to 8 inches in diameter. At Holland in Pipestone County 3 strands of #6 wire measured 4 % inches in diameter and weighed 33 ounces per foot. The ice was described as: "very peculiar in formation being practically round on three sides, the lower side being ragged projectiles like icicles: in other words, pointed. The frost and ice were wet, not flaky like frost usually is. In handling this, it could be squeezed into a ball and did not crumble." March 3-5,1935. Called "the worst ice storm in Duluth's history," the area covered by this storm was centered on Duluth and extended up the Lake Superior coast to Beaver Bay, and east to Ashland, WI. The worst of the storm extended about 40 miles to the west and south of Duluth. The storm began in the evening of March 3, with rain and wet snow falling at the Duluth Weather Bureau, and a temperature of 26 degrees. By morning the snow stopped but the rain continued. Ice had accumulated to % inches by 11 AM and %e inches at 4PM, at which point the lights started going out. By the morning of the 5th, ice coatings were measured at 1.5 inches and Duluth was virtually cut off from the outside world, except for short wave radio. A local ham radio operator sent the Duluth Weather Bureau reports. Four streetcars had to be abandoned in the storm, three of them in the western part of the city. A heavy salt mixture and pick axes were used to try to free the stuck streetcars. A one -mile stretch of telephone poles along Thompson's Hill was "broken off as if they were toothpicks" due to the ice. A Duluth, Masabi & Northern Railway engineer estimated up to 7 inches of ice on cables in Proctor. 75% of shade trees were reported ruined in Moose Lake, with thousands of trees stripped of their limbs. Hibbing also had damage due to ice with the breaking of large and small branches. The Portal Telephone Company in the city of Superior, Wisconsin noted ice from % to 1 % inches in diameter. Nov. 10-11, 1940 (Armistice Day Storm). This destructive storm also produced up to % inch of ice on wires with ice thickness to 1 inch in Pine City and Lake Benton. Combined with fierce winds, damage to power poles was widespread. In correspondence with M.R. Hovde, the meteorologist in charge of the US Weather Bureau Office, Northwestern Bell reported: • Northwestern Bell and Tri-State Telephone & telegraph Company Repairs and Replacements. $79,000 total estimated cost. • Thickness of ice on wires- Generally 1/8-to-1/2-inch diameter. 1 inch in diameter in two small areas. • Time ice first began to form- Early morning of November 11, 1940 • Length of time ice remained on wires- About 24 hours. • Locality of heaviest ice formation- 1-inch diameter in small area near Pine City. 1-inch diameter in vicinity of Lake Benton. 209