[2] North American Company was broken up by the Securities and Exchange Commission, following the United States Supreme Court decision of April 1, 1946.[3] After that, Detroit Edison operated independently, and publicly traded on the New York Stock Exchange under the ticker symbol DTE through the mid-1990s.[5] The Greenwood Energy Center near Avoca, Michigan serves as a peaking power plant for the utility, generating over 815mW when at full capacity.[6] In 2018, the Michigan Public Service Commission approved Blue Water Energy Center, a natural gas combined-cycle plan.Since April 2021, DTE Electric operates 18 wind and 31 solar parks, totaling 1,760 megawatts of clean energy, powering 670,000 homes.Detroit Edison's near 11-gigawatt generating capacity is offered to its 7,600-square-mile (20,000 km2) service area, which encompasses 13 counties in the southeastern portion of the lower peninsula.Energy is distributed via one million utility poles and 44,000 miles (71,000 km) of power lines in these Michigan counties: Huron, Tuscola, Sanilac, Saint Clair, Lapeer, Livingston, Ingham, Oakland, Macomb, Wayne, Washtenaw, Lenawee, and Monroe.By the late 1980s or early 1990, Detroit Edison discontinued use of their equipment, as Conrail began to supply enough locomotives and rolling stock to meet the power company's needs.