Old photos show South Dakota mine that caused sinkhole wasn't so hidden

Historic photographs from the 1960s show the US state of South Dakota operated a second gypsum mine beneath portions of the Black Hawk area that began to collapse in April 2020, forcing residents to evacuate their homes. The photos, taken...

Contest Ranking Modal BG Contest Ranking Modal BG
Contest Ranking Title

The new Mining Power Rankings are live. Vote for the sector’s leaders in each of the Large-, Small-, and Micro-Cap leagues.

Vote Now