Section 8 – Tsunami The Suquamish Tribe Multi-Hazard Mitigation Plan 2017 The Suquamish Tribe Port Madison Indian Reservation November 5, 2017 Multi-Hazard Mitigation Plan The Suquamish Tribe (This Page intentionally left blank) Multi- Hazard Mitigation Plan Page i Multi-Hazard Mitigation Plan The Suquamish Tribe The Suquamish Tribe Multi-Hazard Mitigation Plan Prepared for: The Suquamish Tribe, Port Madison Indian Reservation Funded by: The Suquamish Tribe & Federal Emergency Management Agency Pre-Disaster Mitigation Competitive Grant Program Project #: PDMC-10-WAIT-2013-001/Suquamish Tribe/Hazard Mitigation Plan Agreement #: EMS-2014-PC-0002 Prepared by: The Suquamish Office of Emergency Management Cherrie May, Emergency Management Coordinator Consultants: Eric Quitslund, Project Consultant Aaron Quitslund, Project Consultant Editor: Sandra Senter, Planning Committee Community Representative October, 2017 Multi- Hazard Mitigation Plan Page ii Multi-Hazard Mitigation Plan The Suquamish Tribe (This Page intentionally left blank) Multi- Hazard Mitigation Plan Page iii Multi-Hazard Mitigation Plan The Suquamish Tribe Table of Contents Contents Table of Contents ........................................................................................................................... iv Table of Tables ............................................................................................................................ viii Table of Maps ................................................................................................................................ ix Executive Summary .........................................................................................................................x FEMA Approval Letter .................................................................................................................. xi Tribal Adoption Resolution .......................................................................................................... xii Plan Distribution List: .................................................................................................................. xiii 1 Planning Process Introduction ................................................................................................................ 1-1 1.1 Purpose Statement ............................................................................................................... 1-1 2 The Suquamish Tribal Profile .................................................................................................................. 2-1 2.1 The Suquamish Tribe .......................................................................................................... 2-1 2.2 Suquamish Tribal Governance ........................................................................................... 2-3 2.3 Tribal History & Culture .................................................................................................... 2-4 2.4 Usual & Accustomed Grounds ........................................................................................... 2-7 2.5 Culturally Sensitive Areas ................................................................................................... 2-9 2.6 Demographic Information................................................................................................. 2-12 2.7 Critical Facilities and Infrastructure ............................................................................... 2-13 3 Risk Assessment Rating Criteria ............................................................................................................. 3-1 3.1 Overview ............................................................................................................................... 3-1 3.2 Hazards Profiled .................................................................................................................. 3-2 3.3 Hazards Not Profiled ........................................................................................................... 3-2 3.4 Risk Rating Criteria ............................................................................................................ 3-3 4 Flood Events ........................................................................................................................................... 4-1 4.1 Overview ............................................................................................................................... 4-1 4.2 Impacts .................................................................................................................................. 4-1 4.3 History ................................................................................................................................... 4-2 4.4 Vulnerability ......................................................................................................................... 4-2 4.5 Probability of Occurrence ................................................................................................... 4-3 4.6 Risk Assessment ................................................................................................................... 4-3 4.7 Conclusions ........................................................................................................................... 4-7 4.8 Problem Statements ............................................................................................................. 4-7 4.9 Mitigation Strategies ............................................................................................................ 4-7 5 Severe Storm Events ............................................................................................................................... 5-1 Multi- Hazard Mitigation Plan Page iv Multi-Hazard Mitigation Plan The Suquamish Tribe 5.1 Overview ............................................................................................................................... 5-1 5.2 Impacts .................................................................................................................................. 5-3 5.3 History ................................................................................................................................... 5-4 5.4 Vulnerability ......................................................................................................................... 5-7 5.5 Probability of Occurrence ................................................................................................... 5-9 5.6 Risk Assessment ................................................................................................................... 5-9 5.7 Conclusions ......................................................................................................................... 5-11 5.8 Problem Statements ........................................................................................................... 5-11 5.9 Mitigation Strategies .......................................................................................................... 5-12 6 Landslide Events ..................................................................................................................................... 6-1 6.1 Overview ............................................................................................................................... 6-1 6.2 Impacts .................................................................................................................................. 6-2 6.3 History ................................................................................................................................... 6-2 6.4 Vulnerability ......................................................................................................................... 6-3 6.5 Probability of Occurrence ................................................................................................... 6-4 6.6 Risk Assessment ................................................................................................................... 6-5 6.7 Conclusions ........................................................................................................................... 6-9 6.8 Problem Statements ............................................................................................................. 6-9 6.9 Mitigation Strategies .......................................................................................................... 6-10 7 Earthquake Events .................................................................................................................................. 7-1 7.1 Overview ............................................................................................................................... 7-1 7.2 Impacts .................................................................................................................................. 7-2 7.3 History ................................................................................................................................... 7-3 7.4 Vulnerability ......................................................................................................................... 7-6 7.5 Probability of Occurrence ................................................................................................. 7-10 7.6 Risk Assessment ................................................................................................................