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SCG Members AESO Alberta Electric System Operator BCTC British Columbia Transmission Corporation

Formed to: Foster coordination between the SPGs Assist WECC in developing its 10-year plan Ad-hoc Group Charter approved Purpose Mission Membership Voting Organization

Preparing a Foundational Transmission Project List that WECC can use a starting point for their 10-year plan. The Foundational Transmission Project List will not provide sufficient transmission additions for the 10- year time frame Need to know where new resources (supply or demand side) will be located before a complete transmission plan can be developed WECC will build on SCG foundation to meet resource policy goals and mitigate congestion WECC may also remove or change projects that are in the SCG list The SCG will also provide a list of Potential Projects that WECC can utilize to integrate resources and mitigate congestion 4

Draft Document - Ver. 4.0, May 11, 2010 CAISO CAISO02- Sunrise CAISO03- Midpoint (CA)-Devers SSPG SSPG01- SWIP SSPG03- SNIP (Phase 2) SSPG06 – TCP Harry Allen - Northwest SSPG07 – TCP Northwest – Armagosa SSPG09 – SWIP South SWAT SWAT01-PV-NG#2 SWAT06- Pinal Central – Tortolita SWAT07- Southeast Valley (SEV) SWAT08 – PV - Morgan CCPG CCPG02 – Pawnee – Smoky Hill CCPG03 – Waterton- Midway CCPG04 – San Luis Valley Hemingway NTTG01 NTTG02 Populus NTTG03 NTTG01 NTTG03 Boardman Bethel NTTG06 Townsend NTTG07 Wyoming Montana Idaho Oregon Washington Colorado Utah Nevada California Arizona New Mexico Comanche Waterton Midway Smoky Hill Pawnee CCPG02 CCPG03 CCPG04 SLV Palo Verde SWAT01 North Gila II Pinal Central Midpoint Tortolita SWAT06 Browning SWAT07 FOUNDATIONAL PROJECTS BY 2020 NTTG NTTG01 –Gateway South Phase 1 NTTG02 – Gateway Central Phase 1 NTTG03 – Gateway West Phase 1 NTTG05 – Hemingway – Boardman NTTG06 – Cascade Crossing NTTG07- Mountain States Intertie CG CG01 – I-5 Corridor CG02- West McNary CG03 - Big Eddy – Knight CG04 – Little Goose Area Reinforcement BCTC BCTC01- Nicola – Meridian BCTC03- BC-US Intertie Alberta AESO AESO L Conversion AESO04 Heartland AESO05 West HVDC AESO06 East HVDC AESO07 Fort McMurray - East Line AESO08 Fort McMurray - West Line Mona Aeolus SSPG01 Harry Allen NTTG05 Eldorado SSPG03 SSPG06 Northwest Amargosa Devers CAISO03 Imperial Peňesquitos CAISO02 SSPG07 Midpoint (CA) Morgan SWAT08 McNary John Day Sigurd Red Butte Bridger Castle Rock Troutdale CG01 CG02 Nicola Meridian BCTC01 Oquirrh Limber Terminal Coyote Spgs Legend 500 kV Single Circuit Line 345 kV Single Circuit Line 500 kV Double Circuit Line 345 kV Double Circuit Line DC Circuit (various voltage) Termination Substations Intermediate Substations (1) Map does not reflect 230kV lines that are included in the Foundational Transmission Project List. (2) Internal reinforcements projects not shown for clarity. (3) Lines shown are for illustrative purposes only and may not reflect final line routing. AESO04 AESO05 AESO06 AESO03 AESO08 AESO07 Langdon Alberta Heartland Ellerslie West Brooks Genesee NTTG014 MidColumbia Ingledow Custer BCTC03 DRAFT

CAISO CAISO01- C3ET SSPG SSPG04 – Harry Allen – Mead (line #2) SSPG05 – Mead- Eldorado SSPG08- Blackhawk - Armagosa SWAT SWAT02-PV-Colo. River SWAT03- Navajo Transmission Project SWAT04- SunZia SWAT05- High Plains Express CCPG CCPG01 – WCI CCPG05 – Lamar Front Range CCPG07 – Pawnee - Daniels Park CCPG08 – Pawnee – Story Hemmingway NTTG01 Crystal Populus Windstar Captain Jack NTTG01 NTTG04 Townsend Wyoming Montana Idaho Oregon Washington Colorado Utah Nevada California Arizona New Mexico Daniels Park Missile Site Pawnee Palo Verde SWAT02 Pinal Central Midpoint Springerville POTENTIAL PROJECTS BY 2020 NTTG NTTG01 –Gateway South Phase 2 NTTG02 – Gateway Central Phase 2 NTTG03 – Gateway West Phase 2 NTTG04 – Hemingway-Captain Jack NTTG08 – Chinook NTTG09 – Zephyr NTTG10 – Overland NTTG11 – Transwest Express NTTG13 – Colstrip Upgrade CG CG05 – Juan De Fuca Cable #1 CG06 – Juan De Fuca Cable #2 CG07 – West Coast Cable BCTC BCTC02- CNC including Devils Gap Alberta ESO AESO02- Northern Lights AESO09 – Edmonton - Calgary Mona Aeolus Marketplace Amargosa CAISO01 Colo. River Buckley Sigurd Red Butte Bridger CG07 Selkirk BCTC02 LRS Wray Boone Lamar Vilas Gladstone Blackwater Corona SunZia East SunZia Midpoint Comanche Blackhawk SWAT04 SWAT05 SWAT03 Shiprock Red Mesa Moenkopi Story CCPG 07 CCPG 05 CCPG 01 CCPG 08 SSPG08 Midway Gregg BCTC02 Edmonton Calgary AESO02 NTTG03 Collinsville Eldorado NTTG08 NTTG09 NTTG10 NTTG11 Limber Terminal NTTG02 Mead Harry Allen SWAT05 (1) Map does not reflect 230kV lines that are included in the Foundational Transmission Project List. (2) Internal reinforcements projects not shown for clarity. (3) Lines shown are for illustrative purposes only and may not reflect final line routing. Draft Document - Ver. 4.0, May 11, 2010 AESO09 CG05 CG06 MidColumbia NTTG013 DRAFT Legend 500 kV Single Circuit Line 345 kV Single Circuit Line 500 kV Double Circuit Line 345 kV Double Circuit Line DC Circuit (various voltage) Termination Substations Intermediate Substations

Project Matrix Nearly Complete

Screened projects for regional significance based on voltage level All proposed 500 kV and higher projects 345 kV projects unless the project is deemed not to be a backbone facility Projects above 200 kV that are deemed to be backbone facilities Applied criteria to screened projects to assess the level of certainty of project construction 8

Must Meet at least one of the following: 1) Sponsor is required to build project to reliably serve load or to meet firm commitments for transmission service 2) Project is necessary to integrate WECC LRS Class 0 or Class 1 resources 3) Project sponsor(s) has a firm commitment to fund project construction. SCG is currently using eleven indicators, including: Are m ajor equipment orders placed? Is permitting actively underway or completed? Are there executed project participation contracts? 9

Materials available on the WECC website Go to: Committees>TEPPC>SCG>Documents, for: Approved Charter Go to: Committees>TEPPC>SCG>, for: Draft Criteria Draft Report Draft Matrix Draft Maps Final Foundational Transmission Projects List and report scheduled to be complete by the end of June 10

Overview SCG Charter Foundational Project Criteria Project List Foundational Potential Projects Maps 11

SPGs will remain active in the various WECC groups to support the development of the WECC Plan Working to synchronize SPG planning processes with each other and WECC SPGs will complete reliability analysis of the WECC Plan Planned to be initiated after WECC completes their 10-year plan Probably will be completed by the SPGs as part of their normal reliability assessment cycles 12

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