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RiversideCA.gov
FOURTH AMENDMENT TO INTERCONNECTION FACILITIES AGREEMENT WITH SOUTHERN CALIFORNIA EDISONCity CouncilMay 12, 2026Riverside Public Utilities RiversideCA.gov2
Riverside Transmission Reliability Project (RTRP) – joint project with Southern California Edison (SCE)1. Provides Riverside a second connection to the state electric grid;2. Addresses electrical capacity and reliability needs of Riverside; and3. Improves Riverside Public Utilities' transmission network.BACKGROUND1 2 4/28/2026
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DISCUSSION
Single Connection to the State Grid
Two Connections to the State Grid
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MILESTONES 1. December 2004 - RPU applied for a second connection to the state grid2. January 2006 - Riverside's Board of Public Utilities approved RTRP3. September 2006 - California Independent System Operator approved the project as a necessary and cost-effective addition to the state grid4. March 2009 - Riverside City Council approved the Interconnection Facilities Agreement (IFA) between SCE and RPU defining the terms and conditions regarding RTRP participation, ownership, construction, operation, and cost sharing 3 4
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MILESTONES 5. April 2009 - FERC certified the IFA6. August 2010 – The First Amendment to the IFA is approved by Council and filed with FERC7. April 2015 – SCE submitted its application to the California Public Utility Commission (CPUC) for a Certificate of Public Convenience and Necessity(CPCN) 8. September 2016 – SCE submitted a modified route (Hybrid Route) for the RTRP to the CPUC as part of the CPCN process RiversideCA.gov6
MILESTONES 9. March 2018 – The City Council approved the Second Amendment to the IFA10. December 2018 - The City Council approved Third Amendment to the IFA is approved which rebaselined the facilities costs11. March 12, 2020 - CPUC approves the Certificate of Public Convenience and Necessity (CPCN)5 6 4/28/2026
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MILESTONES 13. May 31, 2020 - SCE reimbursed Riverside $15.439 million for California Independent System Operator Controlled Facilities licensing and permitting costs. The non-reimbursable amount is $15,935,410.88. IFA - Third Amendment Amount Reimbursed to the City by SCEAmount Paid to SCE by RPUExisting 3rdAmendmentIFA Amount $15,439,000.00 $15,439,000.00 $15,439,000.00 Reimbursable Cost of ISO Controlled FacilitiesNon-Reimbursable0$10,597,912.00 Non- Reimbursable SCE Interconnection Facilities Cost “Riverside Facilities”Non-Reimbursable0$2,794,000.00 Non- Reimbursable SCE Interconnection Facilities One- Time CostNon-Reimbursable 0$2,543,498.88 Non- Reimbursable SCE Interconnection Facilities ITCC (tax)$15,439,000.00 $15,439,000.00 $31,374,410.88 TOTALS$15,935,410.88 Total of Non- Reimbursable RiversideCA.gov8
1. Updates project completion schedulea. SCE now proposes to commission Wildlife Substation on or before October 2029 (previously July 2023)b. RPU will complete commissioning of Wilderness Substation within six months after SCE commissions WildlifeFOURTH AMENDMENT 7 8 4/28/2026
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2. Non-Reimbursable Costs:a. Total interconnection facilities cost reduced from $15.94 million to $14.22 millionb. Lower distribution line relocation costs offset inflation-related increases in substation and ITCC costs c. City’s non-reimbursable cost reduced by $1.71 millionFOURTH AMENDMENT Change4thAmendment3rdAmendmentCategory+ $249,088.00$10,847,000.00$10,597,912.00Interconnection Facilities- $2,021,000.00$773,000.00$2,794,000.00One-Time Cost (Distribution Relocation)+ $59,781.12$2,603,280.00$2,543,498.88ITCC (tax)- $1,712,130.88$14,223,280.00$15,935,410.88Total RiversideCA.gov10
3. Payment Milestone:a. Payment schedule for non-reimbursable interconnection facilities has been revised b. Start date changed from January 2020 to July 2026 c. Final payment is now scheduled for July 2029 d. Updated schedule is reflected in Exhibit C FOURTH AMENDMENT 9 10 4/28/2026
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4. Cost of ISO-Controlled Facilities:a. ISO-controlled facilities are owned by SCE and operated under ISO control b. These costs are not the City’s responsibility c. Estimated cost increased from $405.3 million to $750.2 million5. Miscellaneousa. Reflects completed activitiesb. Adds clarification language and definition updates FOURTH AMENDMENT RiversideCA.gov12
That the City Council:1. Approve the Fourth Amendment to the Interconnection Facilities Agreement between Southern California Edison Company (SCE) and the City of Riverside, reducing the Interconnection Facilities cost from $15,935,410.88 to $14,223,280.00 and revising the payment schedule and project completion date; and2. Authorize the City Manager, or his designee, to execute the Fourth Amendment to the Interconnection Facilities Agreement, including minor non-substantive changes, and to sign all documents necessary for Southern California Edison Company to complete the filing with the Federal Energy Regulatory Commission.RECOMMENDATIONS11 12