Category:Bluford-Quadrangle: Revision history

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February 15, 2024

February 18, 2022

June 19, 2020

  • curprev 10:1810:18, June 19, 2020Alan.Myers talk contribs 2,086 bytes +2,086 Created page with "__NOTOC__ ==Mining in the Bluford Quadrangle== The Opdyke Coal was surface-mined in the Bluford Quadrangle. The coal was less than 40 feet deep and 2.0 feet thick or less. Min..."