This primary source comes from the Records of District Courts of the United States.
National Archives Identifier:
298118Full Citation: Tailing piles at Colorado Smelting and Refining Co.; 1893?; Records of District Courts of the United States, Record Group 21. [Online Version, https://www.docsteach.org/documents/document/tailing-piles-at-colorado-smelting-and-refining-co, May 15, 2024]