Adelanto-Rinaldi Line 1 Upgrade Project
2 Documents in Project
Summary
SCH Number
2025070053
Lead Agency
Los Angeles Department of Water and Power
Document Title
Adelanto-Rinaldi Line 1 Upgrade Project
Document Type
NOD - Notice of Determination
Received
Posted
3/11/2026
Document Description
The Los Angeles Department of Water and Power (LADWP) is proposing the Adelanto-Rinaldi Line 1 Upgrade Project (proposed project), which involves ampacity upgrades of the Adelanto – Rinaldi Line 1 (ADL-RIN L1) transmission line to increase its capacity from its current rating of 500 kV at 1593A/1593A (continuous/emergency) to approximately 500 kV at 1680A/1965A. The ampacity upgrade requires ground clearance grading and tower raises in order to be compliant with transmission line safety and reliability standards. The location of the proposed project is along one existing 500 kilovolt (kV) overhead transmission line (ADL-RIN L1) located in the northern portion of Los Angeles County.
The proposed project would be required to comply with the California Public Utilities Commission’s (CPUC) General Order 95 (GO 95) Clearance Code Requirements as mandated by the North American Electric Reliability Corporation (NERC). The specific clearance requirements set by General Order 95 (GO 95) are included in Appendix A. Achieving this height consistency is necessary to ensure the distance between the transmission line conductors and the ground or road surface below is sufficient to meet code requirements guiding the safe and reliable operation of transmission lines. LADWP proposes to comply with the code clearances by grading the ground surface of the area underneath the transmission lines at nine work areas to achieve height consistency per NERC requirements. Additionally, LADWP has identified eight locations where towers would be raised by approximately 10 to 20 feet in order to achieve height consistency.
The total acreage of grading would be approximately 3.74 acres, and the total acreage of tower raising activities would be an additional 1.44 acres. The project, as proposed, would also involve improvements to portions of existing access roads to be used for site access, equipment staging and storage, and distribution of excavated soils. Construction would occur sequentially along the transmission line corridor and is anticipated to take up to 2.5 years. Once construction is complete, operation activities would be minimal and limited to routine operations and maintenance inspections as are currently carried out on the existing line.
Contact Information
Name
Jazmin Martin
Agency Name
Los Angeles Department of Water and Power
Job Title
Environmental Specialist
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Phone
Email
Location
Cities
Palmdale, San Fernando, Santa Clarita
Counties
Los Angeles
Regions
Countywide
Cross Streets
Multiple
Zip
Multiple
Total Acres
5.18
Parcel #
Multiple
State Highways
138, 14, 405
Railways
Metrolink Antelope Valley Line
Airports
Agua Dulce Airport
Schools
Saugus Union USD, LAUSD, Golden Valley HS, Valley View ES, Anave
Waterways
Los Angeles Reservoir
Township
Many
Range
Many
Section
Many
Notice of Determination
Approving Agency
Los Angeles Department of Water and Power
Approving Agency Role
Lead Agency
Approved On
County Clerk
Los Angeles
Final Environmental Document Available at
111 N Hope Street, Room 1044, Los Angeles, CA 90012 and
www.ladwp.com/environmental-reports
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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