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City of Silverton Addendum to the Marion County Natural Hazards Mitigation Plan

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City of Silverton Addendum to the Marion County Natural Hazards Mitigation Plan City of Silverton Addendum to the Marion County Natural Hazards Mitigation Plan Report for City of Silverton 306 S. Water Street Silverton, OR 97002 Prepared by: Oregon Partnership for Disaster Resilience 1209 University of Oregon Eugene, OR 97403-1209 January, 2010 Table of Contents SECTION 1: PLANNING PROCESS ....................................................................................... 1 OVERVIEW .............................................................................................................................. 1 HOW WAS THE ADDENDUM DEVELOPED? .................................................................................... 1 ADOPTION ............................................................................................................................... 5 SECTION 2: COMMUNITY PROFILE .................................................................................... 7 GEOGRAPHY & CLIMATE ............................................................................................................ 7 POPULATION & DEMOGRAPHICS ................................................................................................. 9 EMPLOYMENT & ECONOMICS ..................................................................................................... 9 HOUSING .............................................................................................................................. 10 LAND USE & DEVELOPMENT .................................................................................................... 12 TRANSPORTATION .................................................................................................................. 13 CRITICAL FACILITIES & INFRASTRUCTURE .................................................................................... 19 HISTORIC & CULTURAL RESOURCES ........................................................................................... 23 GOVERNMENT STRUCTURE ....................................................................................................... 23 EXISTING PLANS & POLICIES ..................................................................................................... 23 COMMUNITY ORGANIZATIONS & PROGRAMS .............................................................................. 26 SECTION 3: RISK ASSESSMENT ........................................................................................ 28 DROUGHT ............................................................................................................................. 30 EARTHQUAKE ......................................................................................................................... 31 FLOOD .................................................................................................................................. 43 LANDSLIDE ............................................................................................................................ 51 VOLCANO .............................................................................................................................. 55 WILDFIRE .............................................................................................................................. 56 WINDSTORM ......................................................................................................................... 61 SEVERE WINTER STORM .......................................................................................................... 62 SECTION 4: MISSION, GOALS, AND ACTION ITEMS .......................................................... 67 MISSION ............................................................................................................................... 67 GOALS .................................................................................................................................. 67 MITIGATION ACTION ITEMS...................................................................................................... 68 SECTION 5: PLAN IMPLEMENTATION AND MAINTENANCE ............................................. 73 PLAN ADOPTION .................................................................................................................... 73 CONVENER ............................................................................................................................ 73 COORDINATING BODY ............................................................................................................. 74 PLAN MAINTENANCE .............................................................................................................. 75 CONTINUED PUBLIC INVOLVEMENT & PARTICIPATION .................................................................. 80 FIVE‐YEAR REVIEW OF PLAN ..................................................................................................... 80 APPENDIX A: PLANNING & PUBLIC PROCESS .............................................................. A1 APPENDIX B: GRANT PROGRAMS ................................................................................... B1 APPENDIX C: ECONOMIC ANALYSIS ............................................................................... C1 APPENDIX D: ACTION ITEM WORKSHEETS .................................................................... D1 Section 1: Planning Process Overview Silverton developed this addendum to the Marion County multi- jurisdictional Natural Hazards Mitigation Plan in an effort to increase the community’s resilience to natural hazards. The addendum focuses on the natural hazards that could affect the city of Silverton, Oregon, which include drought, flood, earthquake, landslide, volcano, wildfire, wind storm, and severe winter storm. It is impossible to predict exactly when disasters may occur, or the extent to which they will affect the city. However, with careful planning and collaboration among public agencies, private sector organizations, and citizens within the community, it is possible to minimize the losses that can result from natural hazards. The addendum provides a set of actions that aim to reduce the risks posed by natural hazards through education and outreach programs, the development of partnerships, and the implementation of preventative activities through the city’s development code, wastewater system facility plan, emergency operations plan, etc. The actions described in the addendum are intended to be implemented through existing plans and programs within the city. How was the Addendum Developed? In the fall of 2006, the Oregon Partnership for Disaster Resilience (the Partnership / OPDR) at the University of Oregon’s Community Service Center partnered with Oregon Emergency Management (OEM) to develop a Pre-Disaster Mitigation Planning Grant proposal to create natural hazards mitigation plan addenda for Oregon’s Mid/Southern Willamette Valley cities. FEMA awarded the region with a Pre-Disaster Mitigation planning grant, and planning efforts with the cities of Aurora, Keizer, Silverton, and Woodburn began in the winter of 2009. The Partnership facilitated and documented each of the cities’ planning processes. The following representatives served as steering committee members for the city of Silverton’s natural hazard mitigation planning process. • Rick Lewis, Silverton Police Department • Bryan Cosgrove, Silverton City Manager • Rich Barstad, Silverton Public Works • Darrel Mathews, Silverton Local Business • Doreen Kelly, Silverton Together (Community Nonprofit) • Ed Grambusch, Silverton Fire Department • Steve Kay, Silverton Community Development Department • Genie Stoll, Silverton Business Owner Silverton Addendum January, 2010 Page 1 Backups: • Denny Stoll, Silverton City Council • Stacy Palmer, Silverton Chamber of Commerce • Patrick Lesire, Silverton Merchant’s Group The planning process and associated resources used to create Silverton’s Addendum to the Marion County Natural Hazards Mitigation Plan were developed by the Partnership. To coordinate planning efforts, the steering committees from Aurora, Keizer, Silverton, and Woodburn participated in joint meetings facilitated by the Partnership. The planning process was designed to: (1) result in an addendum that is Disaster Mitigation Act 2000 compliant; (2) coordinate with the state’s plan and activities of the Partnership; and (3) build a network of local organizations that can play an active role in plan implementation. The following is a summary of major activities included in the planning process including public outreach activities. Plan Work Sessions Project Kickoff (February-March 2009) On February 25, 2009, the Partnership hosted a kickoff meeting in Salem with representatives from the cities of Aurora, Keizer, Silverton, and Woodburn. The purpose of the meeting was: 1) to provide an overview of the Pre-Disaster Mitigation Program and the Oregon Partnership for Disaster Resilience; 2) to describe the four-phase mitigation planning process and schedule of meeting dates to occur; and 3) to provide instruction and guidance in developing community steering committees. One or two representatives from each city (i.e., “city leads”) attended. Following the meeting, city leads were asked to develop full steering committees, and to review and edit the community profile section of their city addendums. Risk Assessment (April-May 2009) On April 15, 2009, the Partnership facilitated a risk assessment training / work session with the cities of Aurora, Keizer, Silverton, and Woodburn. The work session was developed
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