 FERGUS FALLS, Minn.--BUSINESS WIRE--Today Otter Tail Power Company submitted its Integrated Resource Plan IRP to regulatory commissions in each of the three states it serves: Minnesota, North Dakota, and South Dakota. The company spent two years analyzing robust market data and engaging with people and organizations across its service area, including updates with its regulatory commissions, who helped inform the analysis. Planning a diverse mix of energy resources to reliably and economica 