PARK COUNTY HAZARD MITIGATION PLAN PRELIMINARY DRAFT PREPARED FOR Park County City of Livingston Tow n o f C l yd e Pa r k MAY 2018 respec.com EXECUTIVE SUMMARY Disasters can strike at any time in any place. In many cases, actions can be taken before disasters strike to reduce or eliminate the negative impacts. These actions, termed mitigation, often protect life, property, the economy, or other values. The Park County Hazard Mitigation Plan addresses sixteen major hazards with respect to risk and vulnerabilities countywide, including in the City of Livingston and the Town of Clyde Park. Through a collaborative planning process, the Park County hazards were identified, researched, and profiled. The major hazards are each profiled in terms of their description, history, probability and magnitude, vulnerabilities, and data limitations. The vulnerabilities to critical facilities, critical infrastructure, existing structures, the population, values, and future development are evaluated for each hazard. Based on the probability and extent of potential impacts identified in the risk assessment, the prioritizations of hazards within Park County are outlined in Table ES-1-1 through Table ES-1-3. Table ES-1-1. Park County Hazard Prioritizations Level Hazard High Hazard Flooding Wildfire Earthquake Hazardous Materials Release Wind Winter Storms and Extended Cold Moderate Hazard Severe Thunderstorms and Tornadoes Communicable Disease and Bioterrorism Avalanche and Landslide Drought Low Hazard Utility Outage Volcano Terrorism, Civil Unrest, and Violence Aviation Accident Railroad Accident 2 Table ES-1-2. City of Livingston Hazard Prioritizations Level Hazard High Hazard Flooding Earthquake Hazardous Materials Release Wind Winter Storms and Extended Cold Moderate Hazard Communicable Disease and Bioterrorism Severe Thunderstorms and Tornadoes Urban Fire Drought Utility Outage Low Hazard Ground Transportation Accident Wildfire Aviation Accident Terrorism, Civil Unrest, and Violence Railroad Accident Volcano Table ES-1-3. Town of Clyde Park Hazard Prioritizations Level Hazard High Hazard Flooding Earthquake Hazardous Materials Release Wind Winter Storms and Extended Cold Moderate Hazard Communicable Disease and Bioterrorism Severe Thunderstorms and Tornadoes Urban Fire Drought Utility Outage Low Hazard Ground Transportation Accident Wildfire Aviation Accident Terrorism, Civil Unrest, and Violence Railroad Accident Volcano The following goals are outlined in the plan’s mitigation strategy, based on the results of the risk assessment: / Goal 1: Reduce damages from flooding. / Goal 2: Prevent losses from wildfires. 3 / Goal 3: Reduce potential losses from earthquakes. / Goal 4: Reduce losses from a transportation or hazardous materials accident. / Goal 5: Promote effective multi-hazard mitigation measures. Associated with each of the goals are objectives and mitigation projects ranging from updating land use regulations to burying electric infrastructure. The mitigation projects are prioritized based on cost, staff time, feasibility, population benefit, property benefit, values benefit, project maintenance, and the probability and impact of the hazards being mitigated. An implementation plan outlines the suggested course of action, given the limited resources available to Park County, the City of Livingston, and the Town of Clyde Park. Park County Disaster and Emergency Services (DES) and the Park County Local Emergency Planning Committee (LEPC) are responsible for the implementation and maintenance of the plan. Other recommended activities, such integrating this plan into a variety of county, city, and town plans, regulations, and documents, will further the goals of hazard mitigation in Park County. The Park County Hazard Mitigation Plan exceeds the requirements of a local hazard mitigation plan as outlined in the Interim Final Rule published in the Federal Register on February 26, 2002 at Title 44 of the Code of Federal Regulations, Part 201 as part of the Disaster Mitigation Act of 2000. This plan has been approved by the Federal Emergency Management Agency as a hazard mitigation plan, and therefore, the county, city, and town may be eligible for federal mitigation funds. This plan serves as a guide for understanding the major hazards facing Park County, the City of Livingston, and the Town of Clyde Park and provides a strategy for preventing or reducing some of the impacts. 4 TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................................................................... 20 1.1 Purpose ....................................................................................................................................................................................................20 1.2 Authorities ...............................................................................................................................................................................................20 1.3 County and Jurisdictional Profile ......................................................................................................................................................21 1.4 Climate Overview ...................................................................................................................................................................................23 1.5 Plan Scope and Organization .............................................................................................................................................................24 2.0 PLANNING PROCESS AND METHODOLOGIES ................................................................................................................. 25 2.1 Initial Planning Process ........................................................................................................................................................................25 2.2 Plan Update Process .............................................................................................................................................................................26 2.2.1 Planning Team .........................................................................................................................................................................26 2.2.2 Community Changes .............................................................................................................................................................27 2.2.3 Plan Changes ...........................................................................................................................................................................27 2.2.4 Jurisdiction Participation .....................................................................................................................................................27 2.2.5 Public Participation ................................................................................................................................................................28 2.2.6 Incorporation of Existing Information................................................................................................................................28 2.3 Plan Adoption .........................................................................................................................................................................................29 2.4 Risk Assessment Methodologies .......................................................................................................................................................30 2.5 Hazard Identification ............................................................................................................................................................................32 3.0 ASSETS AND COMMUNITY INVENTORY .......................................................................................................................... 37 3.1 Critical Facilities and Infrastructure ...................................................................................................................................................37 3.1.1 Critical Facilities ......................................................................................................................................................................37 3.1.2 Critical Infrastructure .............................................................................................................................................................47 3.2 Population and Structures ....................................................................................................................................................................48 3.3 Economic, Ecologic, Historic, and Social Values .............................................................................................................................51 3.4 Current Land Use ....................................................................................................................................................................................53 3.4.1 Clyde Park Area ........................................................................................................................................................................53 3.4.2 Cooke City Area .......................................................................................................................................................................53