1. Study Results Common Case Study This slide deck contains results from the 2011 TEPPC Study Program. This study shows the results of the 2022 Common Case. This study serves as a base case for all 2011 and 2012 studies.

2. 2 2022 PC1 – Common Case Central Question: What impact will future load growth and generation needs (as defined by the input assumptions) have on transmission congestion in the Western Interconnection? These Results will be used as the starting input assumptions for all 2011 and 2012 studies. Results follow… 2

3. 3 2022 Common Case Results – Annual Generation by Resource Type

5. DRAFT

6. 6 2022 Common Case Results – Region to Region Transfers Hourly transfers Presented at the end of this presentation.

7. 7 “Most Heavily Utilized” = A path that meets any one of the following criterion (10-year plan utilization screening): o U75 > 50% o U90 > 20% o U99 > 5% Uxx = % of year that flow is greater than xx% of the path limit 2022 Common Case Results – Most Heavily Utilized Paths

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9. 9 Hourly region-to-region transfers AZNMNV To Ca_S

10. 10 Hourly region-to-region transfers Basin To AZNMNV

11. 11 Hourly region-to-region transfers Basin To Ca_N

12. 12 Hourly region-to-region transfers Basin To Ca_S

13. 13 Hourly region-to-region transfers Ca_N To Ca_S

14. 14 Hourly region-to-region transfers Canada To NWUS

15. 15 Hourly region-to-region transfers NWUS To Basin

16. 16 Hourly region-to-region transfers NWUS To Ca_N

17. 17 Hourly region-to-region transfers NWUS To Ca_S

18. 18 Hourly region-to-region transfers RMPA To AZNMNV

19. 19 Hourly region-to-region transfers RMPA To Basin

20. 20 Hourly region-to-region transfers California Net Export Hours of net export = 6053 hrs

21. Questions or thoughts on this study?