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 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

Dam Hazard Consequences Assessment Out of the total life cycle of a dam study, we are focusing on the consequence assessment.

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

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

Dam Hazard Consequences 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 Visualization of structures depth of flooding

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

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

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

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

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

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.

Dam Hazard Consequences Assessment

Dam Hazard Consequences Assessment

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

Dam Hazard Consequences Assessment

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