1. California Energy Commission Strategic Transmission Planning and Corridors IEPR Commissioner Workshop on Landscape-Scale Environmental Evaluations for Energy Infrastructure Planning and the Strategic Transmission Investment Plan Art Rosenfeld Hearing Room August 3, 2015 Judy Grau Strategic Transmission Planning and Corridor Designation Office Siting, Transmission and Environmental Protection Division Judy.grau@energy.ca.gov / 916-550-8807 1

2. California Energy Commission Today’s Topics Statutory Background Recent Efforts Transmission Corridors Right-sizing Next Steps 2

3. California Energy Commission Statutory Background Garamendi Principles - Senate Bill 2431 (Garamendi, Chapter 1457, Statutes of 1988) Strategic Transmission Investment Plan [STIP] - Senate Bill 1565 (Bowen, Chapter 692, Statutes of 2004) Transmission Corridor Designation [Corridors] Process – Senate Bill 1059 (Escutia and Morrow, Chapter 638, Statutes of 2006) Relationship between STIP and Corridors 2015 IEPR Scoping Order 3

4. California Energy Commission Recent Efforts May 11, 2015 - IEPR workshop on Renewable Progress, Challenges, and Opportunities June 10, 2015 - Kick-off at Governor’s Office for Solar and the San Joaquin Valley Identification of Least-conflict Lands July 9, 2015 - Governor’s Office symposium focused on Governor Brown’s greenhouse gas reduction goals –Importance of regional coordination –Full participation in the California ISO 4

5. California Energy Commission Transmission Corridors Geographic locations for corridors identified in STIP chapter of 2013 IEPR –Desert Renewable Energy Conservation Plan –San Joaquin Valley –San Onofre back-up transmission alternatives Question for feedback –For the 2015 IEPR, what are the appropriate corridors opportunities that should be identified? 5

6. California Energy Commission Right-Sizing Definition Example: SCE Tehachapi Renewable Transmission Project 2011 IEPR 2014 IEPR Update 6

7. California Energy Commission Workshop Questions on Right-Sizing – For Written Comments Is right-sizing transmission a qualitative (policy) issue or a quantitative (metric-based) issue? What criteria should be used to assess right-sizing opportunities? Is right-sizing only appropriate for areas that have been studied in depth for maximum possible renewable build-out, such as DRECP? Given that new policy targets are considered for long-term renewable generation and GHG emission reduction targets, how should right- sizing transmission proposals be evaluated in long-term planning? –Should a specific time frame be applied to the evaluation (10, 15, 20 years)? What is the appropriate way to analyze the costs vs. benefits of a potential right-sizing project? –What is the cost of building a right-sizing opportunity into a future project (for example, build a 230 kV transmission line to 500 kV specifications or a single-circuit line with double-circuit towers)? –How do we evaluate if the increase in cost is worth the risk? 7

8. California Energy Commission Next Steps Written comments due August 17, 2015 –Corridors identified to date and any others –Right-sizing –Other STIP-related comments The STIP will be incorporated into the Draft 2015 IEPR scheduled for release in October 2015 8