As part of his effort to document the last years of mining in the anthracite region, George Harvan also covered mine disasters. When mining for the Knox Company in Port Griffith came illegally and perilously close to the bottom of the Susquehanna River, the roof of the workings caved in and waters from the river flooded that mine and the entire network of interconnected mines in the Wilkes-Barre area. The disaster took twelve lives and marked the end of significant underground mining in the Wyoming Valley.

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