200th mile of cave system mapped at Jewel Cave NMon

Six volunteer cavers were greeted like returning astronauts Monday night after they emerged from mapping the 200th mile of Jewel Cave and reported the discovery of a stalagmite that could be the cave’s largest.

About 50 people were on hand at Jewel Cave National Monument for a potluck and a celebration of the mapping milestone. The greeting party included 94-year-old Jan Conn, who pioneered the exploration and mapping of the cave with her late husband, Herb, during a 22-year period beginning in 1959.

https://rapidcityjournal.com/news/local/explorers-map-th-mile-of-jewel-cave/article_d374c7a3-4902-515c-8e78-8f3a2b3c805d.html