Overview
North Lewiston Substation is an operational electrical substation in Lewiston, Idaho, operated by Avista. It handles voltages of 230 kV and 115 kV, serving the regional power grid.
North Lewiston Substation is an operational electrical substation located in Lewiston, Idaho, United States. Owned and operated by Avista, the facility plays a key role in the regional transmission network, stepping down high-voltage electricity for distribution to local communities and industries. The substation operates at dual voltage levels of 230 kV and 115 kV, typical for transmission and sub-transmission infrastructure in the Pacific Northwest. As part of Avista's grid, it is subject to North American Electric Reliability Corporation (NERC) reliability standards and Federal Energy Regulatory Commission (FERC) oversight, ensuring stable and secure power delivery. Situated in the Lewiston-Clarkston Valley, the substation supports a mix of residential, commercial, and industrial customers. Its location near the Snake River and regional hydropower resources highlights its role in integrating renewable energy into the grid. The facility contributes to grid resilience and energy reliability for the surrounding area.
Environmental context
The substation is located in the Lewiston-Clarkston Valley, a region with a semi-arid climate and significant hydropower generation from the Snake River. The facility's voltage levels and urban-proximate setting influence its environmental footprint, including electromagnetic fields and land use. Avista's operations align with state renewable portfolio standards and grid modernization efforts.
Frequently asked questions
North Lewiston Substation is located in Lewiston, Idaho, United States, near the Snake River in the Pacific Northwest region.
The substation operates at 230 kV and 115 kV, typical for transmission and sub-transmission in the regional power grid.
The substation is owned and operated by Avista, a utility serving customers in Washington, Idaho, and Oregon.
As part of the US grid, the substation must comply with NERC reliability standards and FERC regulations for transmission-level assets.
The substation steps down high-voltage electricity for distribution to residential, commercial, and industrial customers in the Lewiston area, supporting grid stability and energy reliability.