Category:Kinmundy-Quadrangle: Revision history

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    October 27, 2022

    • curprev 09:2109:21, October 27, 2022‎ Alan.Myers talk contribs‎ 2,144 bytes +2,144‎ Created page with "__NOTOC__ ==Mining in the Kinmundy Quadrangle== The only mine known to have operated in the Kinmundy Quadrangle is the Kinmundy Mine (mine index 2849), which opened in 1886 and closed in 1906. The mining began using the longwall method, but changed to the room-and-pillar method after about 10 years. The Springfield Coal is split at this location, with the upper portion of the seam generally less than 3 feet thick and the lower split about 3.5 feet thick, separat..."
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