威斯康辛州爱波顿市狐狸河上的水坝是设置全世界第一座水力发电厂的地点

出处: Detroit Publishing Company. "Dam Across River, Appleton, Wisconsin." Detroit Publishing Company, between 1880 and 1899. Touring Turn-of-the-Century America: Photographs from the Detroit Publishing Company, 1880-1920. American Memory collections, Library of Congress.