The Harriman Building, constructed in 1905, is located on Main Street in Maddock, ND. It was originally a mercantile store owned and operated by L.W. Harriman. The 2nd floor was known as the Maddock Opera House. Plans for renovation of the Harriman Building began in 2009, when a group of citizens united to visualize a dream of renovating the 105-year-old building. Visions became actions when renovation started in the fall of 2009 and culminated in a Grand Opening and the Building Dedication in July 2017.