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Transmission operations ensure the flow of electricity

Our operations reporting, coordination and maintenance efforts help keep the lights on for 30 million people in our balancing authority. 

 

Operations

Transmission access charge (TAC)

Charges assessed, on behalf of the Participating Transmission Owner, to parties who require access to the ISO grid.  

Transmission operating procedures

Transmission outage reports

All transmission outages must be reported to the ISO with a description of the cause and all remedial actions taken. Information is confidential. Access requires a valid user certificate. 

Transmission register

The ISO provides limited access to the register of transmission facilities and entitlements (RTFE) to participants with a demonstrated, legitimate business need in accordance with FERC's January 24, 2003 Order in Docket No. ER03-219. RTFE information is considered critical energy infrastructure information.

Maintenance

Transmission maintenance procedures

Policies and procedures serve as guidelines for participating transmission owners.

Transmission Maintenance Coordination Committee

This independent committee gathers input from participating transmission owners and interested stakeholders on the ISO transmission maintenance standards, reviews proposed changes, recommends revisions to the standards, and advises the ISO vice president responsible for transmission maintenance.

Participating transmission owner tariffs and agreements

Participating transmission owner tariffs

Each participating transmission owner's tariffs for facilities under ISO operational control.

Participating transmission owner applications submitted

See terms and conditions for agreements between California ISO and transmission owners.
  • Participating transmission owner applications submitted
    See terms and conditions for agreements between California ISO and transmission owners.
    • Citizens Sunrise Transmission LLC
    • City of Anaheim
    • City of Azusa
    • City of Banning
    • City of Colton
    • City of Pasadena
    • City of Riverside
    • City of Vernon
    • Startrans IO, LLC
    • The Nevada Hydro Company, Inc. (TNHC)
    • Trans-Bay Cable LLC
    • Trans-Elect NTD
    • Valley Electric Association, Inc.
    • Western Area Power Administration