| Otter Tail Corporation operates as a diversified company with interests in the electric, health services, manufacturing, plastics, and other businesses. The company operates in five segments: Electric, Plastics, Manufacturing, Health Services, and Other Business Operations. The Electric segment produces, transmits, distributes, and sells electric energy. It provides electricity to approximately 128,000 customers, including agricultural, residential, commercial, and industrial customers in Minnesota, North Dakota, and South Dakota. The Plastics segment business produces polyvinyl chloride and polyethylene pipes for municipal water, rural water, wastewater, and other uses in the United States and Canada. The company sells its products primarily to wholesalers and distributors throughout through independent sales representatives, company salespersons, and customer service representatives. The Manufacturing segment produces waterfront equipment, wind towers, frame-straightening equipment, and accessories for the auto body shop industry; material and handling trays and horticultural containers; fabrication of steel products; contract machining; and metal parts stamping and fabrication. The Health Services segment sells diagnostic medical equipment, patient monitoring equipment, and related supplies and accessories. It also provides service maintenance, diagnostic imaging, positron emission tomography and nuclear medicine imaging, portable X-ray imaging, and rental of diagnostic medical imaging equipment. The Other Business Operations segment consists of businesses involved in food ingredient processing; residential, commercial, and industrial electric contracting industries; fiber optic and electric distribution systems; wastewater, water, and HVAC systems construction; transportation; and energy services and natural gas marketing. The company operates primarily in the United States, Canada, Europe, the Middle East, the Pacific Rim, and Central America. Otter Tail was established in 1907 and is headquartered in Fergus Falls, Minnesota. |