Columbia-Pacific Northwest Region

Royal Slope Power Transmission Line Project

Royal Slope Solar LLC, a subsidiary of Clearway Energy Group, has requested a land use authorization license from Reclamation to construct, operate, and maintain electrical power lines and associated access roads on Reclamation-administered land. The 230-kilovolt electrical power line would transmit electricity from a solar power generation facility on private land, across Reclamation-administered land, to the Vantage substation, located east of Wanapum Dam in Grant County, Washington.

Reclamation invited the public to review and comment on the draft EA. Additionally, this served to provide notice and request public input per 36 CFR 800.2(d) on potential effects on historic properties in accordance with Section 106 of the National Historic Preservation Act, as allowed by 36 CFR 800.2(d)(3). The 15-day public comment period ended on March 6, 2026.

Contact

Kavi Koleini
Natural Resource Specialist
208-378-5358
kkoleini@usbr.gov

Bureau of Reclamation
Columbia–Pacific Northwest Region
1150 N. Curtis Road
Boise, Idaho 83706