Otter Tail Corporation is a holding company. The Company, through its subsidiaries, operates through three segments: Electric, Manufacturing and Plastics. The Company's subsidiaries own facilities and equipment used in the manufacture of producing polyvinyl chloride (PVC) pipe, thermoformed products, heavy metal fabricated products, metal parts stamping, fabricating, painting and contract machining. The Company, through its Electric segment, is engaged in the production, transmission, distribution and sale of electric energy in Minnesota, North Dakota and South Dakota by its subsidiary, Otter Tail Power Company (OTP). Its Manufacturing segment consists of businesses engaged in the activities, including contract machining, metal parts stamping, fabrication and painting, and production of material and handling trays and horticultural containers. The Company's Plastics segment consists of businesses producing PVC pipe at plants in North Dakota and Arizona.