The Milwaukee Electric Railway & Light Company

Cold Spring Shops (Milwaukee County, Wisconsin)
The central maintenance shop for mass transit for decades, now repurposed and looking for tenants.
Oneida Street Station (Milwaukee County, Wisconsin)
Repurposed, this neoclassical revival building is listed on both the NRHP and is listed by the American Society of Mechanical Engineers as a National Historic Mechanical Engineering Landmark.
Port Washington Power Plant (Ozaukee County, Wisconsin)
The world's most efficient coal-fired power plant at the time of its construction and for many years afterwards.