Frequently Asked Questions

1. What is the CTPG Transmission Planning Process?
2. How can my organization become a CTPG member?
3. I am a stakeholder. How do I participate in your process? 4. How do I get a copy of the CTPG’s 2010 Transmission Plan?
5. What is FERC Order 890 and why is it important?
6. What power system reliability criteria does the CTPG use in its studies?
7. What regulations govern the CTPG Plan?
8. Where can I find a “glossary of terms?”



1. What is the CTPG Transmission Planning Process?

The recently concluded 2010 CTPG Transmission Planning Process followed the process described at pages 5 and 6 of the CTPG’s May 17, 2011, presentation to the California Energy Commission. This presentation is available at  The CTPG anticipates that its 2011 study process will be similar.

2. How can my organization become a CTPG Member?

Membership in the CTPG is limited to entities that have (i) dedicated their transmission facilities to public service and (ii) undertaken to maintain obligations to serve the public with electricity for wholesale or retail customers under the rate-of-return regulation of a state public utility or public service commission or under the control of customer-elected or state-selected boards, councils, or other bodies that are Transmission Providers designated as either a Planning Authority or Transmission Planner under NERC or WECC regulations, or Transmission Providers that is a membership organization whose members meet the foregoing qualifications, or federal power marketing agencies.  Entities seeking membership in the CTPG should meet the foregoing requirements and forward a written request for membership to the Chairperson of the CTPG Executive Management Committee. Membership is subject to the approval of 100 percent of the voting Members of the CTPG.

The CTPG also includes Non-Member Participants whose participation, rights and obligations are generally consistent with the participation, rights and obligations of Members but with important exceptions. Currently, the California ISO (CAISO) and the Western Area Power Administration (WAPA) are CTPG Non-Member Participants. CAISO is a non-voting participant; WAPA's role as a Particpant avoids obligations, duties, rights or entitlements that arise solely from California laws creating and governing an unincorporated association such as the CTPG.

3. I’m a Stakeholder and I’d like to participate in your current process

4. I’d like a copy of the CTPG’s 2010 California Transmission Plan - Click Here

5. What is FERC Order 890 and why is it important?

FERC Order 890 is available directly from the Federal Energy Regulatory Commission at Its significance for electric transmission planning is highlighted in FERC’s Fact Sheet available at

6. What power system reliability criteria does the CTPG use in its studies?

The CTPG applies the power system reliability criteria enforced by the Western Electricity Coordinating Council (WECC) and the North American Electric Reliability Corporation (NERC). The complete set of criteria is available from NERC at|20.

7. What regulations govern the CTPG Plan?

The CTPG is a subregional planning organization that was formed and operates with the objective of being consistent with certain of the nine planning principles adopted in the Federal Energy Regulatory Commission’s Order 890. The CTPG’s activities observe the following planning principles adopted in Order 890 in the following manner:

  • Coordination. The CTPG was formed for the specific purposes of coordinating the regional and subregional transmission-planning activities of its members.
  • Openness. The CTPG’s transmission-planning process provides stakeholders with meaningful opportunities to provide input and influence the final transmission plan. Meetings of the CTPG Executive Committee are open to the public.
  • Transparency. The CTPG makes available to stakeholders, upon written request, all of the information necessary for stakeholders to replicate the CTPG’s studies and study results.  This information includes data used in the CTPG’s study processes, the models used in the CTPG’s studies, and the results of those studies. In some cases, the release of information deemed to be confidential or nonpublic would require the execution of confidentiality and nondisclosure agreements with one or more Members of the CTPG. Where possible, the CTPG uses public information.
  • Information Exchange. The CTPG will share information and results in the CTPG’s possession among its Members and with other parties, and will seek comparable information and results from other parties, as appropriate for carrying out coordinated transmission planning.
  • Comparability. The CTPG’s transmission-planning work is conducted with an eye toward assuring the provision of transmission services to all transmission customers on comparable terms.
  • Dispute Resolution. The CTPG’s charter describes the manner in which disputes among the Members may be raised and will be resolved.
  • Regional Coordination. Under the umbrella of the CTPG, California’s major load-serving entities, transmission owners, and transmission operators have come together with the common goal of developing a statewide transmission plan for the State of California that achieves certain of the State’s policy objectives and transmission needs. The CTPG has been recognized as a subregional planning entity by both the Federal Energy Regulatory Commission and the WECC Transmission Expansion Planning Policy Committee (TEPPC).  Through the CTPG’s outreach efforts with other regional planning groups in the WECC, the CTPG is supporting regional coordination at the WECC regional level.
  • Economic Planning Studies. To date, the CTPG has not undertaken economic planning studies. The individual Members of the CTPG, or sponsors of proposed transmission projects, may undertake these studies in order to demonstrate to applicable regulatory approval authorities that any specific proposed transmission project is superior to other alternatives.
  • Cost Allocation. Issues related to the allocation of costs for transmission infrastructure additions identified by the CTPG are beyond the scope of the CTPG’s current processes and activities.

8. Glossary of Terms

NERC’s Glossary of Terms can found at
.  This glossary is considered the industry-standard.