Interstate Power and Light Company (IPLDP), operating as a public utility, specializes in the generation and delivery of electricity, alongside the distribution and transportation of natural gas, primarily serving retail customers throughout Iowa. The company structures its operations across three main divisions: Electric, Gas, and Other. IPLDP sources its electricity through a combination of generation from coal, natural gas, and wind energy facilities, supplemented by purchases from wholesale energy markets. Beyond its retail supply, the company also engages in wholesale electricity sales, providing power to municipalities and rural electric cooperatives in Minnesota, Illinois, and its home state of Iowa. Further diversifying its offerings, IPLDP produces and distributes steam for clients in Cedar Rapids, Iowa. Its extensive infrastructure in Iowa includes overhead and underground electric distribution lines, substation transformers, and gas mains. The utility extends its services to incorporated communities. Its diverse retail customer base for electricity spans sectors such as farming, agriculture, industrial manufacturing, chemicals, packaging, and food production. For natural gas, it caters to industries including research, education, hospitality, manufacturing, and chemical companies. As of December 31, 2020, IPLDP served approximately 495,000 retail electric customers and around 225,000 natural gas customers. Tracing its origins to its incorporation in 1925 as the Iowa Railway and Light Corporation, the company is headquartered in Cedar Rapids, Iowa. Interstate Power and Light Company currently operates as a subsidiary of Alliant Energy Corporation.


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