North Mildred Substation: 115 kV Substation in Tacoma, Washington

North Mildred Substation is a key electrical infrastructure asset located in Tacoma, Washington, United States. Operated by Tacoma Power, the substation operates at 115 kV, placing it in the medium-voltage range typical for distribution and sub-transmission networks. As part of the Pacific Northwest grid, it plays a role in delivering reliable electricity to the Tacoma area. The substation's 115 kV voltage level aligns with standard sub-transmission voltages used across the United States. It operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which enforce reliability standards for bulk power systems. Tacoma Power, a public utility, manages this facility as part of its local distribution network, ensuring compliance with grid codes and operational protocols. Environmentally, the substation supports the integration of renewable energy sources common in the Pacific Northwest, such as hydropower from the Columbia River system. Its urban location in Tacoma means it serves a mix of residential, commercial, and industrial customers, contributing to community resilience and economic activity. The facility's operational status ensures continued grid stability and power quality for the region.

Located in Tacoma, Washington, the substation operates in a region with a temperate maritime climate and significant hydropower generation. The 115 kV voltage level indicates a role in local distribution, potentially supporting urban load centers and renewable energy integration. The facility's urban setting means it is subject to land-use regulations and may incorporate design features to minimize visual and noise impacts on surrounding communities.