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Dam Hazard Consequences Assessment

Dam Hazard Consequences Assessment. ASFPM May 2010 James Demby – FEMA Ed Beadenkopf - RAMPP Jim Murphy - RAMPP. Dam Hazard Consequences Assessment. OVERVIEW Objectives Work Plan Approach Assessment Pilot Studies Schedule . Dam Hazard Consequences Assessment.

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Dam Hazard Consequences Assessment

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  1. Dam Hazard Consequences Assessment ASFPM May 2010 James Demby – FEMA Ed Beadenkopf - RAMPP Jim Murphy - RAMPP

  2. Dam Hazard Consequences Assessment OVERVIEW • Objectives • Work Plan • Approach • Assessment • Pilot Studies • Schedule

  3. Dam Hazard Consequences Assessment Provide recommendations for a process a community can follow to effectively execute an economical and effective dam failure consequence assessment OBJECTIVES • Work with stakeholders to conduct a pilot study to assess the potential consequences to a community from a dam failure • Evaluate the processes used in the pilot study to determine the lessons learned, capture the best practices, and provide recommendations on an assessment process

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  5. FEMA Dam Safety Task Orders • Two task orders were issued in Sept 2009 • Dam Consequence/Assessment • Standardized Guidance for Dam Breach Modeling and Inundation Mapping

  6. Dam Hazard Consequences Assessment APPROACH • Select a representative dam/communities for the pilot studies • Coordinate with state and local stakeholders (e.g., decision makers, emergency managers, planners, first responders) • Support a community with the analysis of their vulnerability to dam failure through a collaborative process • Compile, analyze, and document the study results in a report that captures lessons learned, best practices, and recommendations for an assessment process

  7. Visualization of structures depth of flooding Dam Hazard Consequences Assessment ASSESSMENT • Impacts on human health and safety, special needs facilities, industrial areas, and Critical Infrastructure and Key Resources (CIKR) • Economic and environmental impacts • Impact on local government capabilities and services • Indirect effects due to disruption and loss of function by key facilities, such as power supply and water • Impact on public confidence

  8. Dam Hazard Consequences Assessment IMPACTS TO BE EVALUATED • Direct Economic Impacts • Physical impacts • Immediate recovery costs • Debris removal • Regional and Indirect Economic Impacts • Indirect impacts (e.g., relocation, loss of business) • Induced Impacts (e.g., loss of critical infrastructure) • Social Impacts • Loss of Life • Psychological issues/stress related to hazard event • Public confidence issues • Environmental Impacts • Natural Resources • HTRW Concerns • Institutional Impacts • Governmental Services • Nongovernmental Services

  9. Dam Hazard Consequences Assessment SELECTION OF PILOT STUDY COMMUNITIES • Developed Action Plan to select and prioritize communities for pilot study • Evaluate key information about communities • Population at risk – potential loss of life (significant population size within 5-15 miles of dam) • Significant infrastructure impacts • Impacts to lifeline systems – impacts on first responders and emergency management assets, required systems and networks • Loss to function or performance of the dam/reservoir (e.g. loss of municipal water supply) • Environmental and Economic Impacts • Identified 12 communities as potential pilot studies

  10. Dam Hazard Consequences Assessment SELECTION OF PILOT STUDY COMMUNITIES • Communities below the Howard Hanson Dam in the State of Washington have been selected for the first pilot study • Unique opportunity for FEMA to work the USACE and DHS • Efforts are part of the Dam Sector Exercise Series 2010 (DSES-10) • Initial planning workshop held in April 2010 • Recently received funding to conduct two additional pilot studies • One pilot study anticipated to be conducted in the Washington DC region • One pilot study anticipated to be conducted in North Carolina

  11. Dam Hazard Consequences Assessment SELECTION OF PILOT STUDY COMMUNITIES • Howard Hanson Dam • USACE owns and operated the dam • Safety concerns have forced the operation of the reservoir to remain at normal pool elevation, therefore no flood storage capabilities • To operate the dam to prevent catastrophic failure, increased releases may occur • Downstream communities will experience increased flooding because of the lack of floodwater retention at the dam • Impacted areas are heavily developed • Downstream communities very active in preparing for increased flooding and have been coordinating with each other and other agencies

  12. Dam Hazard Consequences Assessment SELECTION OF PILOT STUDY COMMUNITIES • Howard Hanson Dam (continued) • Currently being evaluated as part of the 2010 Dam Sector Exercise Series (DSES-10) • Opportunity to collaborate with DHS and USACE • Attended initial planning workshop in late April • Currently working with DHS and USACE to define FEMA’s role with DSES-10

  13. Dam Hazard Consequences Assessment 2010 DAMS SECTOR EXERCISE SERIES – GREEN RIVER VALLEY (DSES-10) • Overall Purpose: Enhance regional preparedness and disaster resilience thru multi-jurisdictional discussion-based activities involving a wide array of public and private stakeholders. • DSES-10 Focus: Analysis of short- and long-term regional impacts created by a flooding scenario affecting a large portion of the Green River Valley. • Flooding scenario will serve as the triggering event to analyze impacts and interdependencies. • DSES-10 Goal: Develop a regional resilience strategy in collaboration with public and private stakeholders • Communities at Risk: Auburn, Kent, Renton, and Tukwila in King County, State of Washington.

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  16. Dam Hazard Consequences Assessment INITIAL DSES PLANNING WORKSHOP • Date: Wed 28 April 2010 (Seattle, WA) • Total Participants: 150 (private & public sector) Federal (55), State (20), County (10), City (29), Private Sector (26), NGOs (10) • Federal Agencies: BPA, DHS, FEMA (HQ and Region X), FERC, NOAA, NWS, USACE • State of Washington • King County • Cities of Auburn, Kent, Renton, Seattle and Tukwila • AT&T, Bank of America, Boeing, Chelan County PUD, Costco, Puget Sound Energy, Qwest, Safeway, among others

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  18. Dam Hazard Consequences Assessment REPORT OUTLINE Hazard Identification - information that is required for conducting the consequence analysis, the type of information required as well as the agency, stakeholder, or source of this information Risk and Vulnerability Assessment - methodologies and frameworks communities can use to identify assets (e.g., human, structural, governmental, economic, and environmental) that may be at risk Consequence Assessment - provide methods for communities to assess the potential impacts and the extent of damages of a dam failure on their community How to Apply the Results – what a community can do with the results

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