VERNON COUNTY WISCONSIN MULTI- HAZARDS MITIGATION PLAN 2018-2022 FOR R A W D J C AC O K L S A O F N F U L B A C N R This plan was prepared by the Mississippi River Regional O MRRPC O N S S R E E Planning Commission through a cooperative cost sharing V T E R O E agreement with the Vernon County Board of Supervisors, the R M N P O E Mississippi River Regional Planning Commission, Wisconsin A M L E N A PI U PE Emergency Management, and the Federal Emergency PI E R C E Management Agency. Vernon County Multi-Hazards Mitigation Plan 2018-2022 ABSTRACT Title: VERNON COUNTY MULTI-HAZARDS MITIGATION PLAN Plan Purpose: This plan’s purpose it to identify goals, projects and actions the county, other local governments and other organizations can undertake to reduce hazard risks to life, health and property. This plan through properly addressing the federal requirements in the Disaster Mitigation Act of 2000 makes the county and other local governments that participated in the planning process eligible for Federal Hazard Mitigation Grant Programs. These programs can assist in planning, relocation and infrastructure projects that reduce and sometimes eliminate losses and damage from hazards. Plan Participants: This plan was prepared under the direction of the County Emergency Management Committee who coordinated their plan development efforts through the County Emergency Management Director. The Mississippi River Regional Planning Commission who wrote a planning grant to fund this plan was contracted with to write the plan and facilitate public meetings. Plan Contact Brandon Larson, Vernon County Emergency Management Director Information: Erlandson Office Building 318 Fairlane Drive, Suite 5 Viroqua, WI 54665 Telephone: 608-637-5266 Mississippi River Regional Planning Commission 1707 Main Street, Suite 435 La Crosse, WI 54601 Telephone: 608-785-9396 Vernon County Multi-Hazards Mitigation Plan 2018-2022 Vernon County Multi-Hazards Mitigation Plan 2018-2022 VERNON COUNTY, WISCONSIN MULTI-HAZARDS MITIGATION PLAN 2018-2022 TABLE OF CONTENTS ABSTRACT 1.0 – VERNON COUNTY MULTI-HAZARDS MITGATION PLANNING PROCESS ...................................................... 1-1 Disaster Mitigation Act of 2000-DMA2K ............................................................................................................................................. 1-1 Plan Committees and Organizations .................................................................................................................................................. 1-1 Public Involvement .............................................................................................................................................................................. 1-1 Funding for the Vernon County Multi-Hazards Mitigation Plan ........................................................................................................... 1-2 Incorporated Plans, Studies, Reports and Technical Data ................................................................................................................. 1-3 Plan Contents ..................................................................................................................................................................................... 1-3 Updated Information ........................................................................................................................................................................... 1-3 Plan Contact Information .................................................................................................................................................................... 1-3 Table 1-1 – Risk Assessment Survey Mailing List .............................................................................................................................. 1-4 Table 1-2 – Project Needs Survey Mailing List ................................................................................................................................... 1-5 Table 1-3 – Municipal Survey Results ................................................................................................................................................ 1-6 2.0 – VERNON COUNTY PLANNING AREA .................................................................................................................. 2-1 General Geography ............................................................................................................................................................................ 2-1 Demographic and Economic Profile ................................................................................................................................................... 2-2 Table 2-1 - Vernon County Population and Land Area Data .............................................................................................................. 2-2 Table 2-2 - Vernon County Housing and Housing Units per Square Mile .......................................................................................... 2-3 Table 2-3 - Vernon County Employment by Industry .......................................................................................................................... 2-4 General Development Pattern ............................................................................................................................................................ 2-5 Table 2-4 - Vernon County Land Use ................................................................................................................................................. 2-5 3.0 - VERNON COUNTY RISK ASSESSMENT .............................................................................................. 3-1 Historical Occurrence Rating Criteria ................................................................................................................................................. 3-1 Vulnerability Rating Criteria ................................................................................................................................................................ 3-1 Probability Rating Criteria ................................................................................................................................................................... 3-1 Local Official Hazard Survey Rating Criteria ...................................................................................................................................... 3-1 Risk Assessment Designation ............................................................................................................................................................ 3-2 3.1 - Vernon County, Hailstorm Risk Assessment .............................................................................................................................. 3-2 3.2 - Vernon County, Lightning Storm Risk Assessment .................................................................................................................... 3-4 3.3 - Vernon County, Thunderstorm Risk Assessment ....................................................................................................................... 3-6 3.4 - Vernon County, Tornado/High Winds Risk Assessment ............................................................................................................ 3-9 3.5 - Vernon County, Flooding Risk Assessment ............................................................................................................................... 3-12 3.6 - Vernon County, Dam Failure Flooding Risk Assessment ........................................................................................................... 3-18 3.7 - Vernon County, Forest/Wildland Fire Risk Assessment ............................................................................................................. 3-20 3.8 - Vernon County, Heavy Snowstorm Risk Assessment ................................................................................................................ 3-22 3.9 - Vernon County, Ice Storm Risk Assessment .............................................................................................................................. 3-24 3.10 - Vernon County, Blizzard Risk Assessment .............................................................................................................................. 3-26 3.11 - Vernon County, Extreme Cold Risk Assessment ..................................................................................................................... 3-27 3.12 - Vernon County, Earthquake ..................................................................................................................................................... 3-29 3.13 - Vernon County, Extreme Heat Risk Assessment ..................................................................................................................... 3-30 3.14 - Vernon County, Agricultural Risk Assessment ......................................................................................................................... 3-32 3.15 - Vernon County, Drought Risk Assessment .............................................................................................................................. 3-33 3.16 - Vernon County, Fog Risk Assessment ..................................................................................................................................... 3-34 3.17 - Vernon County, Landslide Risk Assessment