2017 Study Program Discussion Colby Johnson, Associate Engineer, WECC Western Electricity Coordinating Council

2016 Study Program Status Timeline For Completion; Q4 2016 Completed Year 10 Studies High/Low Load High/Low Hydro High/Low Natural Gas Price High/Low CO2 Price Pending Year 10 Studies Coal Retirement/Low Carbon Future High Renewables Double Energy Efficiency Probabilistic Assessment High DER Future PNW Pump Storage with High Renewables Compressed Air Energy Storage (CAES)/Double CAES Capacity Double Battery Storage High Storage with PC18 & PC19 Integration Increase Wind in NM/WY with Changing Network Topology PC21 with Increased RE in Southern CA and Southwest PC21 with Increased RE in Northern CA and High Hydro Conditions Decommission of Eldorado-Moenkopi line. Completed Year 20 Studies Draft 2034 Reference Case Pending Year 20 Studies Final 2034 Reference Case Scenario 2 (Focus on Clean Energy) Scenario 3 (Focus on Short-Term Consumer Costs) Scenario 4 (Focus on Long-Term Societal Costs) Scenario 5 (EWCC) High DG Coal Retirements Western Electricity Coordinating Council

Potential 2017 Study Themes of Interest Effects of Distributed Energy Resource (DER) technologies and policies Changing Resource Mix; High DG, Storage, etc… Emerging Technologies; New Hydro, Modular Nuclear, Storage Technologies, Load Management (Demand Response/Demand Side Management) Potential environmental regulations Increased adoption of electric vehicles with residential storage technologies Western Electricity Coordinating Council

Questions? Colby Johnson Associate Engineer Western Electricity Coordinating Council cjohnson@wecc.biz Western Electricity Coordinating Council