A GIF image showing a map of Bainbridge Island transmission infrastructure. Three substations: Port Madison Substation constructed in 1980 in northern Bainbridge, Winslow Substation constructed in 1960 near Winslow, and Murden Cove Substation in eastern Bainbridge.

One transmission line runs across Agate Pass to Port Madison Substation. A second transmission line connects Port Madison Substation to Winslow Substation, and a third transmission line connects Port Madison substation to Murden Cove substation. No transmission lines connect Winslow Substation to Murden Cove substation, making the infrastructure system look like an upside-down Y instead of a loop.