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Learn all about RPU's current projects.

Riverside Transmission Reliability Project (RTRP)

The Riverside Transmission Reliability Project (RTRP) provides Riverside with a critical second connection to the California grid. Riverside needs additional power capacity to serve existing and projected electrical demand and avoid blackouts.

In March 2020, the California Public Utilities Commission (CPUC) unanimously voted to approve the Riverside Transmission Reliability Project (RTRP). Further updates to this page and the process will be coming shortly. Learn more about the CPUC’s decision


Learn why Riverside's second connection to the grid is so critical.

Show Your Support

Help us urge the CPUC to approve the RTRP project by submitting a letter of support.


Learn about route and our need for expanded capacity.


Answers to the questions you may have about RTRP.

Latest News

Stay up-to-date with the latest news from RPU.


Why is it important?

Currently, all of RPU's imported energy comes through a single power connection from Southern California Edison's (SCE) Vista Substation, located in the city of Grand Terrace. Through that connection, only a certain amount of energy, 557 megawatts (MW), can reach the city.

If the electrical needs of RPU customers exceed that amount of energy, there is not any way to bring additional power into Riverside, as there are no other outside connections. While over the past ten years RPU has built a number of power generation plants within the city that can help supply extra energy in time of peak demands and emergencies, they do not provide reliable, long-term solutions to the city's capacity shortage, nor will they be enough to meet current and projected energy load growth.

The RTRP would create a second connection to outside power lines, and a second substation, that would reduce dependence on a single substation and connection, increase the amount of energy RPU could import, and provide greater flexibility to expand our energy delivery system to meet Riverside's growing energy needs well into the future. Show your support.



Riverside Transmission Reliability Project (RTRP) Anticipated Timeline for Next Steps Toward Construction (As of Nov 1, 2018)

Item Date
The California Independent System Operator (CAISO), which is the independent organization responsible for planning the statewide transmission grid, conducted studies concluding a need for the project June 2006
Riverside Public Utilities (RPU) began holding public meetings for the project January 2007
RPU issued the Draft Environmental Impact Report for public review August 2011
City of Jurupa Valley filed a California Environmental Quality Act lawsuit March 2013
City of Jurupa Valley's claims were rejected, in the Los Angeles Superior Court May 2014
SCE filed a Certificate of Public Convenience and Necessity (CPCN) application with the California Public Utilities Commission (CPUC) for approval to construct the project April 2015
SCE filed an amended CPCN application with the CPUC April 2015
Application deemed complete by CPUC January 2017
Publication of Draft Subsequent EIR April 2018
Public Comment Period on Draft Subsequent EIR (45 Days) April-May 2018
Publication of Final EIR October 2018
2020 CPUC Decision Spring 2020



Info on SCE Notice of Ex Parte Communication - 05/17/17

Info on RTRP Public Meeting - 12/18/15

Notice of Availability of Final RTRP Project EIR

Riverside Public Utilities - RTRP Project Environmental Impact Report (EIR) – 2011 (whole project)

SCE RTRP Final Environmental Impact Report (230kV portion only)

Visit CPUC's website for more information.


Additional Questions

Please contact:

George Hanson
Project Manager
(951) 710-5013