Transmission Planning Report

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1 Transmission Planning Report Board of Directors Meeting December 15,

2 Overview Study Team Reports Puget Sound Area Study Team Northern Mid-Columbia Study Team Cross Cascades Study Team Centralia Closure Study Team Wind Integration Study Team Northwest Area Coordinator WECC 10-Year Plan ColumbiaGrid 2011 Biennial Transmission Expansion Plan

3 Puget Sound Area Study Team

4 Northern Mid-Columbia Study Team

5 Cross Cascades Study Team

6 Figure 10: Wind Resources

7 Wind Integration Study Team Held a webinar on 12/8 Two main items Task force to work on increasing dynamic transfer capability limits Completion of the report Relative Northwest Benefits of Local vs. Remote Wind Generation

8 Centralia Closure Study Team Developed a study plan Preliminary summer peak and light load study results to be discussed tomorrow (web conference)

9 Northwest Area Coordinator Activities to date Case development performance metrics (Nov-Dec) Two cases approved and posted on the WECC website Four additional cases under development Procedure improvements Completed PacifiCorp data submittal improvements BPA data submittal improvements under development Updates to already approved cases Will be posted under the System Assessment website CG will post preliminary system assessments of updated WECC planning cases for the January 27 planning meeting 2016 Heavy Summer 2021 Heavy Summer Heavy Winter Scenario with 100% Northwest wind generation Heavy Winter

10 Regional Transmission Expansion Planning Project (RTEP) Ten-year plan on schedule for completion in late 2011

11 Subregional Planning Group Coordination Group (SCG)

12 SCG Activities Coordinate activities between SPG s More formal review of neighboring SPG Plans Assist WECC by populating the Transmission Project Information Portal: Assist WECC with the reliability analysis of the 10-year plan

13 2011 Biennial Plan Review Process Draft Biennial Plan posted November 18 th Discussed at November 4 th and December 2 nd planning meetings Comment period through December 7 th Also contacted those not at the December 2 nd planning meeting 13

14 2011 Biennial Plan Review Process Public Review Draft for Board will be posted before Christmas Board will consider taking action on the Biennial Plan at February 17 th meeting 14

15 2011 Biennial Plan Study areas => Potential Study Teams 1. Olympic Peninsula 2. Spokane Area 3. Okanogan Area 15

16 Sensitivity Studies 2011 Biennial Plan 1. Low Generation in the Puget Sound Area 2. Closure of Centralia Power Plant 3. Further study of voltage stability studies and unsolved outages from the System Assessment 4. Northern Mid-Columbia Area 5. Five year light load case 6. Sammamish-Lakeside-Talbot Hill 230 kv lines 16

17 Figure 1: ColumbiaGrid Ten-Year Plan

18 Project Name Sponsor Date Change from Previous Plan Estimated Cost A1 Moscow 230 kv Substation Rebuild and Transformer Replacement Avista 2012 New Project $15 Million B1 Mid-Columbia Area Reinforcement (Vantage-Midway 230kV line upgrade) and 230 kv sectionalizing breakers at Vantage and Midway Substations Bonneville Power 2011 $14 Million B2 Second 230/115 kv transformer at Redmond Substation Bonneville Power 2011 $12 Million B3 Bakeoven Series Capacitors plus other shunt capacitors and line upgrades (COI Upgrade) Bonneville Power $64 Million B4 John Day - McNary 500 kv Line Bonneville Power $247+ Million B8 Lower Valley Reinforcement (SE Idaho) Bonneville Power/others $48 Million B9 Ponderosa 500/230 kv #2 Transformer Addition Bonneville Power 2013 New Project No Cost Yet CH1 Relocation/upgrade of the McKenzie - Wenatchee Tap 115 kv line Chelan $6 Million CO1 Cowlitz PUD conversion from 69 kv to 115 kv (Longview-Cowlitz #2, Longview- Lexington #2, Longview-Lexington-Cardwell) Cowlitz PUD $3 Million D1 Douglas - Rapids 230 kv line and Rapids 230/115 kv Substation Douglas 2013 $16 Million PS5 230/115 kv transformer addition at Sedro Woolley Substation in north Puget Sound area Puget Sound Energy $9.4 Million SN1 Beverly Park 230/115 kv transformer (North Puget Sound) Snohomish PUD $25 Million T1 Cowlitz 230 kv transformer replacement (second bank), line retermination, and bus reliability improvement projects Tacoma Power $7.0 Million T2 Canyon Substation and 230/115 kv transformer (Tacoma area) Tacoma Power 2011 $10.0 Million T3 Southwest Substation 230 kv bus reliability improvement project Tacoma Power 2016 $3.0 Million x1 Rapids - Columbia 230 kv line (Mid-Columbia area) undetermined 2013 $11 Million Total of all ColumbiaGrid projects $1,190 Million Cancelled Projects Sandpiper Substation connecting into the existing Ashe-Marion 500 kv line and the new McNary-John Day 500 kv line Bonneville Power NA cancelled New Lookingglass Substation on the Reston - Dixonville 230 kv line (Roseburg area) PacifiCorp NA cancelled Table 1: ColumbiaGrid Ten-Year Plan (partial list)

19 Projects Recently Energized Sponsor Date Retermination of the lines into Andrew York Substation in the Wenatchee area Chelan County PUD 2010 Wenatchee-McKenzie 115 kv Upgrade in the Wenatchee area Chelan County PUD 2010 Rapids - South Nile 115 kv line in the Wenatchee area Douglas County PUD 2010 Sedro - Horse Ranch 230 kv line in the North Puget Sound area Puget Sound Energy 2010 Olympic Peninsula Reinforcement (Satsop-Shelton 230 kv line) Bonneville 2009 Libby - Troy 115 kv line rebuild in western Montana Bonneville 2009 Rogue SVC (South Oregon Coast) Bonneville 2009 Larson-Stratford 115 kv line in central Washington Grant County PUD 2009 Wine Country 230/115 kv Substation (Yakima area) PacifiCorp 2009 North Seattle 115 kv transmission line upgrade Seattle City Light 2009 Boundary 230/115 kv transformer replacement Seattle City Light/Bonneville 2009 Novelty 230/115 transformer fed from the existing Monroe-Sammamish 230 kv line in the north Seattle area Puget Sound Energy 2008 Covington - Berrydale 230 kv line in the south Puget Sound area Puget Sound Energy 2008 Rocky Reach - Andrew York 230 kv line and Andrew York 230/115 kv Substation north of Wenatchee Chelan County PUD 2008 Columbia - Quincy 115 kv line reconductoring in central Washington Grant County PUD 2008 Benewah - Shawnee 230 kv line in eastern Washington Avista 2008 Dry Creek - North Lewiston 230 kv line reconductoring in central Washington Avista 2008 Carver - McLoughlin 230 kv line in the southeast Portland area Portland General Electric 2008 Tambark Junction - Clearview 115 kv line in the north Puget Sound area Snohomish County PUD 2008 Rocky Ford 230/115 transformer in the Mid - Columbia area Grant County PUD 2008 Sherwood - Murrayhill 230 kv line in the southwest Portland area Portland General Electric 2008 Sedro - Bellingham #3 115 kv Reconductor in the north Puget Sound area Puget Sound Energy 2008 Table 3: Projects Recently Energized

20 2011 Biennial Plan Some longer term projects have moved to the Ten Year Plan Ponderosa 500/230 kv Transformer Moscow 230/115 kv Transformer 20

21 Longer Term Project Areas 1. West of Cascades North and South Upgrades 2. Colstrip Upgrades 3. North King County 230/115 kv Transformation and Capacity Increase 4. Pearl- Sherwood Upgrades 5. Shelton-Fairmount-Port Angeles support 6. North Downtown Seattle 7. Mid-Columbia Area Reinforcement 8. Spokane Area 230 kv Reinforcement 9. Lewiston Reinforcements 10. Chemawa 230/115 kv transformer additions 11. Blue Lake-Gresham 230 kv line 12. Kalama Energy 13. Trojan-Horizon 230 kv line 14. Additional 500/230 kv transformation in South Puget Sound area 21

22 Figure 9: Northwest to British Columbia

23 Figure 10: Wind Resources

24 Project Name Add Bus section breaker at Columbia 230 kv to split station bus Separate the terminals of the 230 kv lines between Pearl and Sherwood Substations with new breakers to separate circuits Remove jumpers from the circuits between Raver-Covington and Raver-Tacoma 500 kv lines Trip remote ends Pearl-Cushman 115 kv lines along with consequential load to mitigate inadvertent breaker opening Trip remote ends of McNary - Franklin 115 kv line to mitigate inadvertent breaker opening Trip remote ends of the Fairmount - Happy Valley line to mitigate inadvertent breaker opening Trip remote ends of Sherwood-Cascade Tap- Carlton 230 kv line along with consequential load to mitigate inadvertent breaker opening Trip remote ends Redmond - Harney 115 kv lines along with consequential load to mitigate inadvertent breaker opening Potential Mitigation Proposed by: Bonneville Bonneville/Portland General Electric Bonneville Tacoma Bonneville Bonneville Bonneville/Portland General Electric Bonneville Table 5: Transmission Owner Identified Mitigation Projects Substation Max Mvar Owner Calapooya 110 PacifiCorp Dixonville 45 PacifiCorp East Omak 50 Bonneville Flathead 15 Bonneville Green Valley Tap 25 Bonneville Horse Heaven 30 Bonneville Pilot Butte 80 PacifiCorp Ponderosa 110 PacifiCorp Roundup 20 Bonneville Tillamook 35 Bonneville TRS 20 Energy Northwest Table 6: Potential Reactive Mitigation Projects

25 Review Process Public Review Draft of 2011 Biennial Transmission Expansion Plan for Board Review will be posted before Christmas Board to consider taking action on Biennial Plan at February 17 th meeting Comments and questions today? 25

Ten-year Plan. Figure 1 and Table 1. Each of the facilities shown in the plan is described in greater depth in the last appendix of this report.

Ten-year Plan. Figure 1 and Table 1. Each of the facilities shown in the plan is described in greater depth in the last appendix of this report. Ten-year Plan As a result of the analysis completed for the 2009 System Assessment, the follow-up sensitivity studies, analysis completed by the study teams, and individual planning participant studies,