Mark your calendars!
10/21/2026
Rainbow Community Planning Group
6:30pm
Rainbow Valley Grange, 2160 Rainbow Valley Blvd, Rainbow, CA 92028
10/21/2026
Rainbow Community Planning Group
VOTING ITEM - the group will be to take a vote in opposition to GPP
6:30pm
Rainbow Valley Grange, 2160 Rainbow Valley Blvd, Rainbow, CA 92028
Fall/Winter 2026
SDGE to file with CPUC
Fall/Winter 2026
SDGE to file with CPUC
This opens the formal proceeding where public comment becomes part of the record. Once filed, a docket number will be assigned so that you c...
Winter 2026- 2029
State & federal permitting
Winter 2026- 2029
State & federal permitting
If approved, construction would begin.
Fall 2029- 2032
Construction phase
Fall 2029- 2032
Construction phase
We invite you to listen to live bands play beautiful music in the park. Enjoy the sounds of Laureen Davis and the Kings, and enjoy wine tast...
2032
Targeted commercial operation
2032
Targeted commercial operation
SDG&E targets a 2032 in-service date (its regulatory filings cite October 2032). Note this is a target, not the deadline: CAISO's latest re...
Past Events
May 18, 2023
CAISO approves the project
May 18, 2023
CAISO approves the project
The California Independent System Operator's Board of Governors approves the line in its 2022–2023 Transmission Plan, under the official na...
May 2024
CAISO select Horizon West as the winning bid
May 2024
CAISO select Horizon West as the winning bid
Through a competitive solicitation, CAISO selects Horizon West Transmission (a NextEra Energy affiliate) as the approved project sponsor — ...
August 29, 2025
Horizon West hands SDG&E the line
August 29, 2025
Horizon West hands SDG&E the line
Horizon West assigns the 500 kV transmission-line portion to SDG&E (CAISO-approved under Tariff §24.6), while keeping the new substation no...
September 2026
SDGE starts engaging with CPUC
September 2026
SDGE starts engaging with CPUC
On September 26, the CPUC's own review agenda asks SDG&E to confirm the project is the same one CAISO calls Imperial Valley – North of SONGS...
August 18 2026
The Yellows go to SD Board of Supervisors meeting
9AM
SD County Administration Center, 1600 Pacific Highway, Room 310, San Diego, CA 92101
August 18 2026
The Yellows go to SD Board of Supervisors meeting
The neighbors of the 15 regions surrounding Palomar Mountain are encouraged to **attend **and **speak **at** **the Board of Supervisors Meet...
9AM
SD County Administration Center, 1600 Pacific Highway, Room 310, San Diego, CA 92101
Palomar Mountain Needs your Help!
Tell us why you believe Palomar Mountain, with its very unique old-growth forest and the beauty of the Four Seasons, should be preserved for future generations.