Lower section of the electric light mast at Bridge Square, Minneapolis, ca. 1883. The first centralized hydroelectric power in the United States turned on in downtown Minneapolis on September 5, 1882.
Lower section of the electric light mast at Bridge Square, Minneapolis, ca. 1883. The first centralized hydroelectric power in the United States turned on in downtown Minneapolis on September 5, 1882.
Bluff seen from the north branch of the Root River in Olmsted County Park, south of Simpson, Minnesota. Photograph by Wikimedia Commons user Jonathunder, 2017. GNU free documentation license.
Thin layers of Platteville limestone on top of a St. Peter sandstone base inside Minnehaha Park in Minneapolis. Photo by William Wesen, September 26, 2006. Public domain.