State Hazard Mitigation Plan

The 2018 State of Idaho Hazard Mitigation Plan updated strategies, events, risk analyses, and actions, and a 2020 update added a statewide seismic assessment and High Hazard Potential Dam Program requirements.

Executive Summary

Table of Contents

Chapter 1 – Hazard Summary and Mitigation Strategy

Chapter 2 – State of Idaho Profile

Chapter 3 – Hazards in Idaho

Chapter 3.1 – Wildfire

Chapter-3.2-Flood

Chapter 3.3 – Severe Weather

Chapter 3.4 – Avalanche

Chapter 3.5 – Drought

Chapter 3.6 – Earthquake

Chapter 3.7 – Landslide

Chapter 3.8 – Volcanic Eruptions

Chapter 3.9 – Civil Disturbance

Chapter 3.10 – Cyber Disruption

Chapter 3.11 – Hazardous Materials

Chapter 3.12 – Pandemic

Chapter 3.13 – Radiological

Chapter 3.14 – Idaho Hazards

Chapter 3.15 – Risk Assessment Dam Failure

Chapter 4

Chapter 5

APPENDIX A

APPENDIX B

APPENDIX C

APPENDIX D

APPENDIX E

APPENDIX F

APPENDIX G

The State of Idaho Hazard Mitigation Plan (the Plan) has been updated by an All Hazard Mitigation Planning Executive Committee, technical working groups, and key stakeholders to provide strategic vision for mitigation planning, risk and consequence analysis for all hazards, and comprehensive statewide reviews of mitigation programs. The Plan targets actions to reduce disaster assistance costs, and it preserve disaster assistance eligibility for the State and the local governments within its borders. The Plan is the comprehensive, statewide mitigation planning effort conducted in Idaho. It identifies hazards and associated vulnerabilities within the State and provides a comprehensive statewide strategy to reduce future disaster losses through sound mitigation projects.

Specifically, the Plan:

• Assesses statewide risk from hazards present in the State.
• Establishes a framework for statewide Mitigation Planning and Implementation.
• Develops opportunities for State, Regional, Tribal, and Local Mitigation Planning and Implementation.
• Facilitates integration of mitigation into community development before disasters occur, and during disaster recovery.

The 2018 SHMP updated natural hazard events and risk analyses, as well as human-caused and technological hazards. Enhancements to the mitigation strategy goals, objectives, and actions reflect completed and future actions. The Plan is organized by Hazard Unit so that users of this Plan may easily focus on specific matters in greater detail.