In 1866, Colorado City became the site of two stamp mills, located there for ease of supplying wood to operate its steam driven mechanism. One was the old Colorado Mill brought down the canyon from
El Dorado City, and refurbished. The other was the new New Era Mill.[2]
^Daily Alta California, Volume 18, Number 5922, 28 May 1866, p.1 col. 5-6; OUR ARIZONA CORRESPONDENCE, Up The Colorado, (from the Correspondent of the Alta California), El Dorado Canyon, April 30th, 1866, Alling [Frank S. Alling]
Photos from El Dorado Canyon, 1907 from digital.library.unlv.edu, Nevada State Historical Society Photo Collection, accessed 5/12-13/2014. Views of Colorado City site in 1907. Steamboat service had ceased in 1905.