After considerable investigation and planning by Consumers Energy in the 1920s, construction on the Hardy Dam began in 1929. It was designed by William G. Fargo and construction was carried out by his company, Fargo Engineering. Large amounts of concrete were placed into the foundation as solid bedrock was not present, particularly in the streambed. Allied Engineers began constructing the power plant in the autumn of 1929. In August 1930 the Muskegon River was diverted through the power plant penstocks and away from the dam construction site. The embankment of the dam was filled by March 1931 using the semi hydraulic method of construction. About 1,500,000 cu yd (1,100,000 m3) of sand and gravel was used in the dam. Both the dam and power plant were complete by the end of 1931.