College & Walnut Substation - Avista 115 kV Substation in Spokane, Washington

College & Walnut Substation is an operational electrical substation located in Spokane, Washington, United States. Owned and operated by Avista, the facility plays a key role in the local electrical infrastructure, stepping down transmission voltage for distribution to residential and commercial customers. The substation operates at 115 kV, a common voltage level for sub-transmission and distribution in the United States. As part of Avista's network, it is subject to NERC reliability standards and FERC regulation, ensuring grid stability and compliance with mandatory reliability requirements. The facility likely includes modern switchgear and protection systems to manage power flow and isolate faults. Located in an urban area of Spokane, the substation supports the growing energy demands of the city. Its operation contributes to the resilience of the regional grid, providing essential power to homes and businesses. Avista's commitment to maintenance and upgrades helps ensure continued reliable service.

The substation is situated in an urban environment in Spokane, Washington, where it supports the local electrical grid. Urban substations like this one are critical for distributing power efficiently while minimizing land use. The 115 kV voltage level indicates a balance between transmission capacity and environmental footprint, as higher voltages require larger rights-of-way. Avista's operations are subject to environmental regulations regarding electromagnetic fields, oil containment, and noise mitigation.