Bass Asbestos Mine: William Bass's trail-and-tram asbestos claim
A trail-builder’s side-hustle asbestos claim in Hakatai Canyon, sold for wartime prices in 1917-1918, now a 500-foot no-entry buffer in the park’s rulebook.
Asbestos
Grand Canyon's mine inventory: 38 sites, 75 features, by the numbers
NPS has counted 75 abandoned mine features across 38 sites in the park, part of a 37,050-feature nationwide problem. Here’s the public accounting.
Hance Mine: the asbestos claim behind the canyon's first tour guide
John Hance mined asbestos near Sockdolager Rapids, sold out in 1901, and became famous for storytelling instead. The river corridor there is now a hard closure.