SWG Report to TAS 2010 Study Program May 27, 2010 Marv Landauer

1. SWG Report to TAS 2010 Study Program May 27, 2010 Marv Landauer

2. Study Program Changes since February 24 TAS Meeting • Increased priority of acquisition of LTT so 2030 studies can be run late this year • SPSC, WGG, 12,000 MW WY requests • Moved 6000 MW MT and WY requests and TresAmigas to 2020 studies • Prioritized 2019 resource locations • AZ/SNV, WY, BC, NNV, AB, MT, NM, NW Coastal • Did not combine SPSC and WGG requests • Upgraded Midway-Gregg 500 project from low to high priority (Path 15)

3. 2029 Studies • Carryover from 2009 Study Program • Heavy renewable development • Compare incremental transmission development with a 765 kV overlay

4. 2019 Studies • Develop 8 regional resource shifts portfolio cases for 2019. For each case: • Reduce CA renewables by 12 TWh, about 1/5 of CA’s 33% RPS in the 2019 basecase. • Shift location by adding 12 TWh of equivalent resources to a different study area. • Those 8 study areas are AZ/So. NV, WY, BC, No. NV, AB, MT, NM and NW Coastal in priority order. • Include pump storage expansion cases and 2009 expansion study requests • Continue work until fall when 2020 case is ready

5. 2020 Studies New 2020 base case and scenarios • Request for carbon reduction, DSM, EE and new generation technology studies • Include resource refresh from 2010 L&R data • Include SCG Foundation Plan • Include MT and WY requests for 6000 MW studies • These studies will be the focus for this fall/winter

6. 2030 Studies • 2030 Study Requests: (12,000 MW WY resource scenario, carbon reductions, new generation technologies) • Accelerate acquisition of new long-range tools that can address a wide range of policy options – hopefully complete in this year’s program

7. Schedule for Study Program • TEPPC approved Study Program on April 26 with editorial changes. • Posted for reconsideration until May 15. • Three entities provided input on six issues. • June 17: TEPPC needs to address requests for reconsideration, finalize Study Program.

8. Keres Consulting Requests for Reconsideration • KC wants paragraph inserted into study program that states AC interconnections between EI and WI are technically and economically feasible. • We think the feasibility is questionable, which is the reason for the proposed scoping study • KC notes that their request for consideration of 765 kV as the standard voltage for projects between interconnections is covered in 2029 EC2 study. • 2029 EC2 is evaluating a potential 765 kV overlay for the Western Interconnection only

9. Xcel Energy Request for Reconsideration • No specific CO resource scenario was proposed in the new 2019 studies so Xcel would like CO resources considered in WY and NM scenarios. • This can be done in implementation of study plan (selection of resources by the SWG Resource Team)

10. TransWest Express Requestfor Reconsideration • Higher renewable penetration into WY is important and TWE is concerned about the medium priority assigned to the 6,000 MW and 12,000 MW WY wind studies (2020 and 2030). • Increased experience and efforts to increase WECC study resources should ensure timely study completion but prioritization is needed, nonetheless. • TWE supports study of actual projects rather than generic projects. Also supports including capital cost evaluations in addition to operating costs in all studies. • That is what is proposed in the study plan. • TWE is asking TAS to look at how contract path methodology might impact the need for new transmission. • Assigned to MWG for further consideration.

11. Study Program approval by TAS • Reconsideration requests do not require any changes to Study Program. • Is existing Study Program acceptable for approval by TAS?

12. 2010 Study Program Updates • 2029 Carryover studies Heidi • 2019 Studies • Study Progress Heidi • Resource Scenarios Tom • 2020 Basecase development Heidi/Tom