Winter view of water, with ice, or completely frozen, cascading out of a floodgate on Silver Lake Ditch and down the hillside at about 1st and Pearl Streets in the mouth of Boulder Canyon. 1880-1909.   Photo Courtesy of Carnegie Branch Library for Local History, Boulder Historical Society Collection.

2008 photo by John Waugh. 1800s: Local call number at Carnegie Branch Library for Local History: BHS 215-1-34 PHOTO.