Otter Tail Corporation, together with its subsidiaries, engages in electric utility, manufacturing, and plastic pipe businesses in the United States. It operates through three segments: Electric, Manufacturing, and Plastics. The Electric segment generates, purchases, transmissions, distributes, and sells electric energy in Minnesota, North Dakota, and South Dakota; and operates as a participant in the Midcontinent Independent System Operator markets. This segment generates electricity through coal, fuel oil, solar, wind, and natural gas for residential, commercial, and industrial customers. Its Manufacturing segment engages in metal fabrication services for custom machine parts and metal components and manufacturing thermoformed plastic products for use in the agriculture, construction, ho…