By Joel Zook, Energy Planner, and Andy Johnson, Executive Director On June 1, 2021 Black Hill Energy filed a rate increase request with the Iowa Utilities Board. Black Hills serves approximately 4,300 customers in Winneshiek County, including most of Decorah, Calmar, Ossian and Ridgeway. Customers have likely already seen the impact of the interim rate increase on their bills, though much of the effect is hidden in non-heating months. Iowa
