Mount Si Substation - 115 kV Electrical Substation in Washington, United States

Mount Si Substation is a 115 kV electrical substation located in Washington, United States. Owned and operated by Puget Sound Energy, it plays a key role in the regional power transmission network, serving the surrounding communities with reliable electricity. The substation operates at a voltage level of 115 kV, which is typical for sub-transmission and distribution substations in the United States. As part of Puget Sound Energy's infrastructure, it is subject to NERC reliability standards and FERC regulations, ensuring grid stability and compliance with federal and state requirements. Located in a region with growing energy demand, Mount Si Substation contributes to the resilience of the local grid. Its operational status and voltage level indicate its importance in distributing power from higher-voltage transmission lines to local distribution networks, supporting both residential and commercial customers in the area.

The substation is situated in a region with mixed urban and rural land use, near the Cascade foothills. Its operation involves managing electromagnetic fields and potential impacts on local wildlife, though standard mitigation measures are typically employed. The 115 kV voltage level places it in a category where environmental considerations focus on right-of-way maintenance and stormwater management.