County of Nez Perce ALL HAZARD MITIGATI ON PLAN A January 2020 INCLUDING THE JURISDICTIONS OF: Lewiston Culdesac Peck (in the State of Idaho) 0 1 TITLE PAGE County of Nez Perce ALL HAZARD MITIGATION PLAN Including the Jurisdictions of: Lewiston Culdesac Peck (in the State of Idaho) APPROVED - January 21, 2020 - January 20, 2025 UPDATE: March 24, 2021 Submitted by: Nez Perce County All Hazards Mitigation Plan Steering Committee & Nez Perce County Office of Emergency Management Approved date: January 21, 2020 Cover Photo Credit: Molly Konen – NPC Imaging Dept County of Nez Perce AHMP – January 2020 2 TITLETABLE PAGE OF CONTENTS Title Page ................................................................................................................................... 1 Table of Contents ....................................................................................................................... 2 Mission Statement ...................................................................................................................... 3 Background ................................................................................................................................ 4 Purpose ...................................................................................................................................... 5 Definitions ................................................................................................................................... 6 Methodology ............................................................................................................................... 7 Limitations ................................................................................................................................ 15 Community Profile .................................................................................................................... 17 Planning Process ...................................................................................................................... 24 Risk Score Numeric Ranking .................................................................................................... 27 Overview of Threats, Hazards, Risks & Vulnerabilities .............................................................. 28 Discussion of Threats, Hazards, Risks & Vulnerabilities ........................................................... 31 Overview of Proposed Mitigation Projects ................................................................................. 61 Prioritization .............................................................................................................................. 63 Discussion of Proposed Mitigation Projects .............................................................................. 64 Adoption Process ..................................................................................................................... 89 Plan Maintenance ..................................................................................................................... 90 Resources Used ....................................................................................................................... 91 Conclusion ................................................................................................................................ 92 Appendix A: Adoptions ............................................................................................................ 94 Appendix B: Flood Ordinance #98 ............................................................................................ 98 Appendix C: Discussion of Select Grants ................................................................................ 124 Appendix D: Questionnaire ..................................................................................................... 132 Appendix E: Geologic Hazards Study .................................................................................... 135 Appendix F: Nez Perce County Soils Report ......................................................................... 141 Appendix G: Capabilities Assessment Tool ........................................................................... 148 County of Nez Perce AHMP – January 2020 3 TITLEMISSION PAGE STATEMENT The goal of the Nez Perce County All Hazards Mitigation Plan is to: Quantify and qualify the Threats and Hazards faced by the residents, agencies, interests and jurisdictions within Nez Perce County. Bring visibility to both the Risks and Vulnerabilities faced by the same. Engage stakeholders, through a whole community approach, in leveraging strategies to protect, prevent and mitigate against these Threats, Hazards, Risks and Vulnerabilities. Create a useable, readable, plain language plan which clearly presents stakeholders with valid pertinent information without resorting to complex terms and industry specific language. Our hope is that this plan can be picked up a member of the community at large and read from cover to cover without additional assistance. Provide a platform which satisfies applicable state and federal guidelines so as to create access to grant funds and funding streams to realize the projects contained herein. All for the purpose of lessening the impacts to Life, Health, Safety, Property and the ability of the county and its agencies to deliver essential service; so that the residents of Nez Perce county might continue to enjoy the benefit of a safe and prosperous community. [section ends] County of Nez Perce AHMP – January 2020 4 TITLEBACKGROUND PAGE Nez Perce County, through its Civil Defense Coordinator (and later its Office of Emergency Management) has maintained some version of Countywide Mitigation Plan for several decades. The previous plan was written in 2003, adopted in 2004, revised in 2009, and again in 2014. There was however, no yearly maintenance of the plan. The previous versions of the plan focused solely on natural Hazards and relied heavily on data from the decades previous flowed into now obsolete prediction and modeling software to predict future Threats. In addition, that iteration of the plan lacked a unified approach for quantifying the Threats and Hazards faced by the community. In early 2017 an outside contractor was selected to assist the county in moving forward and a series of meetings were held. Ultimately, the stakeholders involved did not feel that the contractor captured their concerns and was not adequately engaged in the process. With the hiring of a new Emergency Management Director in early 2018, and upon review of the lack of progress through the selected contractor, it was the decision of the County to move forward with a completely re-written plan drafted with resources within the County, and the Cities therein. [section ends] County of Nez Perce AHMP – January 2020 5 TITLEPURPOSE PAGE The purpose of an All Hazards Mitigation Plan is to provide a common framework for the discussion of the Threats, Hazards, Risks and Vulnerabilities faced within a jurisdiction. It is also to provide stakeholders with a clear understanding of the projects proposed to offset that Risk and show the prioritization that the stakeholders feel is appropriate to each project. In addition it is the hope of the Nez Perce County AHMP Steering Team and expectation of the stakeholders that sacrificially participated in this process, that each of the jurisdictions referenced in this plan formally adopt the plan recognizing its importance to their particular jurisdiction and citizens. Following adoption it is the hope of the planners that the jurisdictions will recognize the work that has gone in to this process, as a product that their own particular stakeholders have provided input to, and as a result that future capital projects and expenditures will be directed at the local level in regard to the projects, assessments and analysis contained herein. At no time is this plan offered as a “one size fits all” assessment. Rather, it seeks to aggregate data and form a holistic picture of Risk and Vulnerability; with special emphasis on areas of the county which face an increased Risk or Vulnerability to a particular Threat or Hazard for one or more reasons. This Plan satisfies the requirements for a local multi-Hazard mitigation plan and flood mitigation plan under 44 CFR Part 201.6 and 79.6 and serves as the Community Wildfire Protection Plan under 44 CFR part 201 and 206. [section ends] County of Nez Perce AHMP – January 2020 6 TITLEDEFINITIONS PAGE Throughout this plan, certain words are used which have specific meaning within the All Hazards Mitigation Plan planning process or within Emergency Management in general. To avoid confusion, please find a list of common phrases found though this plan, their definitions and meanings. In the event that there is a question or concern about the language choices used, we encourage you to reach out to the Nez Perce County Office of Emergency Management at: [email protected] Hazard: A naturally occurring or human-induced process or event with the potential to create loss, i.e. a general source of danger. (Environmental Hazards—Assessing Risk and Reducing Disaster. 2nd ed. Pg 10 Smith, Keith. Routledge, NY 1996) Risk: The potential losses associated with a hazard and, defined in terms of expected probability and frequency, exposure, and consequences (Multihazard Risk Assessment, pg xxi, FEMA, 1997) Threat: A natural or man-made occurrence, individual, entity, or action that has or indicates the potential