RAC Implementation Status Byron Woertz, Manager—System Adequacy Planning Market Issues Committee, March 23, 2017 Western Electricity Coordinating Council

Scenario Development Subcommittee Modeling Subcommittee RAC Focus Questions RAC What reliability risks might the Western Interconnection face in the next 20 years? Scenario Development Subcommittee What are the plausible futures in which potential reliability risks could arise? Studies Subcommittee What studies should the RAC perform to better understand potential reliability risks? Modeling Subcommittee What models should WECC use to complete necessary reliability studies? Data Subcommittee What data will WECC need to complete necessary reliability studies? Western Electricity Coordinating Council

Guiding Principles for RAC FERC Order 890 The RAC will be consistent with the Commission’s planning principles Diversity Seek diversity in member classes, interest groups, and geographic representation Consensus The RAC, subcommittees and work groups will make most decisions by consensus Work Products All products determined to be valuable to stakeholders could still be completed under the new structure Clear Responsibilities Responsibilities for overseeing development of each product will be clear Empowered Subcommittees Most of the technical, analytical, and other reliability assessment work be done at the subcommittee level Western Electricity Coordinating Council

RAC RAC Responsibilities Resource Adequacy Reliability Risk Mitigations System Stability Concerns Load and Resource Balance Issues Resource Adequacy Physical and Economic System Utilization Data and Models Used in Assessments (including ADS) Current and Future Trends Affecting Reliability Western Electricity Coordinating Council

Western Electricity Coordinating Council RAC Roles Coordinate activities that span multiple RAC subcommittees Provide separate forums for addressing transmission and load service reliability issues Work collaboratively with WECC management in providing input to the strategic plan, and developing the three-year operating plan Work collaboratively with WECC management to ensure adequate resources are available for the RAC to complete the work identified in the three-year operating plan Provide information to WECC management on RAC activities and work products including NERC Reliability Standard compliance topics, efficiency/economic reliability issues, including socio-political considerations, and system resource and transmission adequacy; Western Electricity Coordinating Council

RAC Structure Reliability Assessment Committee Governing Body Scenario Development Subcommittee Governing Body Studies Subcommittee Governing Body Modeling Subcommittee Governing Body PCM Modeling Work Group Modeling and Validation Work Group Short Circuit Modeling Work Group Data Subcommittee Governing Body Power Flow Data Work Group PCM Data Environmental Data Work Group Western Electricity Coordinating Council

RAC Governing Body RAC Chair Scenario Development Subcommittee Chair Dave Angell, Idaho Power Company RAC Chair Bryce Freeman, Wyoming Office of Consumer Advocate Scenario Development Subcommittee Chair Peter Mackin, USE Consulting Studies Subcommittee Chair Chifong Thomas, Smart Wires, Inc. Modeling Subcommittee Chair Stephanie Imamovic, Seattle City Light Data Subcommittee Chair Western Electricity Coordinating Council

Current RAC Activities Complete Subcommittee Governing Body Selection (Nominating Committee) Develop Communication Plan Develop Transition Plan Create RAC Charter Western Electricity Coordinating Council

Board Approval of RAC and ADS Implementation RAC Implementation Timeline RAC Governing Body Members Seated 2/1/2017 RAC Subcommittee Governing Body Members Seated 3/31/2017 Board Approval of RAC and ADS Implementation 12/6/2016 RAC Assumes Full Responsibility 9/13/2017 2016 Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2018 Today 90 days RAC Nominating Committee 1/1/2017 - 3/31/2017 365 days Develop ADS Processes 1/1/2017 - 12/31/2017 89 days Create RAC Charter and Protocols 2/1/2017 - 4/30/2017 91 days Create Subcommittee Charters and Protocols 4/1/2017 - 6/30/2017 91 days Create Data Quality Protocol 4/1/2017 - 6/30/2017 225 days Collaborate with Current PCC and TEPPC Committees 2/1/2017 - 9/13/2017 75 days Transition to New Committee Structure 7/1/2017 - 9/13/2017 90 days Create Draft ADS 1/1/2018 - 3/31/2018 91 days 4/1/2018 - 6/30/2018 Create Final ADS