1. Strawman 2017 Study Program Framework: March 22
Portfolio Cases
Expansion Cases
Special topic studies based on results of portfolio cases, expansion cases, and sensitivities
High Wind portfolio – ( TWh)
East-West Tx Expansion
Medium Wind portfolio - (40-50 TWh)
North-South Backbone Tx
Curtailment sensitivities
Import/Export of Path 46
Coal plant flexibility to reduce RE curtailment
Hydro flexibility to reduce RE curtailment
Identify contingency event for high renewables
Dispatch with opportunity/variable costs
Resource Adequacy review
2026 Common Case 2.0
High Solar Portfolio
( TWh)
As Needed Tx
Medium Solar Portfolio - (40-50 TWh)
North-South Backbone Tx
Offshore wind NW alternative (12 TWh)
Coastal offset E-W Tx
Western Electricity Coordinating Council

2. Initial Concept – March 3
Portfolio Cases
Expansion Cases
List of in-depth Studies based on 3 portfolio cases and 2 expansion cases (select 5?)
East-West Tx Expansion
Wind Heavy portfolio
Curtailment sensitivities
Coal plant flexibility sensitivities
Import/Export of Path 46
Hydro flexibility to reduce RE curtailment
Identify contingency event of high renewables
Dispatch with opportunity/variable costs
Resource Adequacy review
North-South Backbone Tx
2026 Common Case
Solar heavy
portfolio
North-South Backbone Tx
Offshore wind alternative
Coastal Tx offset E-W Tx
Storage alternative
Storage offsets Tx additions
Western Electricity Coordinating Council

3. March 3 - Options for High and Medium RE portfolios
Benefit of a using a High and Medium Wind and Solar portfolio case that it would provide more data points to perform the in-depth studies selected. Gives us more information to perform follow up work.
Portfolio Cases
High Wind portfolio – 2026 PC12 (130 GWh)
Wind portfolio
Medium Wind portfolio – 2026 PC (40-50 GWh RE)
2026 Common Case
High Solar
Portfolio (130 GWh)
Solar heavy
portfolio
Medium Solar
Portfolio – 2026 PC22 (40-50 GWh)
Western Electricity Coordinating Council