Otter Tail Corporation is a holding company, which invests in a portfolio of diversified operations, including electric utility, manufacturing, and plastic pipe businesses. The Company operates through three segments: Electric, Manufacturing, and Plastics. The Electric segment includes the generation, purchase, transmission, distribution, and sale of electric energy in western Minnesota, eastern North Dakota, and northeastern South Dakota. The Manufacturing segment consists of businesses which provide metal fabrication services and manufacture thermoformed plastic products. These businesses have manufacturing facilities in Georgia, Illinois and Minnesota and sell products primarily in the United States. The Plastics segment consists of businesses producing polyvinyl chloride (PVC) pipe primarily used in municipal water infrastructure at plants in North Dakota and Arizona. The PVC pipe is sold primarily in the western half of the United States and Canada.