Mine: Mansfield Mine, MI
The Mansfield Mine was located about six miles east of Crystal Falls in Iron County. The mine operated from 1890 until about 1913 when it was worked out and finally closed. Ore was shipped from this location on the Chicago & Northwestern railroad via a branch line from Crystal Falls Junction. [MINDAT]
In 1893, the mine, which was located under the Michagamme River, collapsed causing the river to flow into the various levels of the mine. 27 miners were killed in the disaster. The river was later diverted and the water was pumped out of the mine and mining resumed.