PacifiCorp Lassen Substation Project

3 Documents in Project


SCH Number
Lead Agency
Public Utilities Commission (California Public Utilities Commission)
Document Title
PacifiCorp Lassen Substation Project
Document Type
FIN - Final Document

Document Description
The proposed project is located in city of Mount Shasta and in unincorporated Siskiyou County. The proposed project consists of the demolition of the existing Mount Shasta Substation, construction of the new Lassen Substation, and pole replacement and reconductoring activities. The existing and proposed substations are located to the west in I-5 and the pole replacement, and reconductoring activities would occur both on the west and east of I-5 in the south central portion of unincorporated Siskiyou County. Existing transformers in the Mount Shasta substation would be replaced with 12.47 kV transformers in the new Lassen Substation, which in turn would require the existing 4.16 kV distribution lines that currently supply the city to be upgraded to 12.47 kV distribution lines. To accommodate the additional weight of the new distribution lines and maintain compliance with title 8 of the California code of regulations and CPUC General order 95, 36 wooden poles along the existing 69 kV transmission line running to the northwest and southeast of the proposed substation would be replaced and the existing 69 kV transmission line would be transferred to the new poles. Implementation of the proposed improvements would help ensure PacifiCorp that all equipment and structures comply with current company, state, and federal standards, including the replacement of aging and non-standard equipment and the removal of sulfur hexafluoride distribution breakers, ensure a reliable ongoing electricity supply to the area currently served by the Mount Shasta substation; and facilitate regional bulk transmission voltage stability and improve bulk power transfer across the region.

Contact Information
Michael Rosauer
California Public Utilities Commission
505 Van Ness Avenue
San Francisco, CA 94102-3298

(415) 703-2579


Mount Shasta
Cross Streets
SR 78, Creelman Ln, Arena Way, Oak Hollow Rd, Littleplace Rd
Parcel #
036-220-280, -170
State Highways
Mt Shasta ES, I AM School
Cold Creek, Big Springs Creek, Wagon Creek, Mill

Notice of Completion

Development Type
Other (electrical substation and transmission facilities)
Local Action
Other Action Other Action: CPUC permit to construct
Project Issues
Cumulative Effects Landuse Wildlife Wetland/Riparian Water Supply Water Quality Vegetation Traffic/Circulation Toxic/Hazardous Solid Waste Soil Erosion/Compaction/Grading Schools/Universities Recreation/Parks Public Services Population/Housing Balance Noise Minerals Geologic/Seismic Forest Land/Fire Hazard Flood Plain/Flooding Drainage/Absorption Archaeologic-Historic Air Quality Agricultural Land
Reviewing Agencies
California Department of Parks and Recreation California Energy Commission California Highway Patrol California Public Utilities Commission Caltrans, District 4 Department of Fish and Wildlife, Region 3 Department of Toxic Substances Control Department of Water Resources Native American Heritage Commission Regional Water Quality Control Board, Region 1 Resources Agency
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