That was an excellent report on a largely unseen part of the "deep state." As you no doubt recall, I live in the Pittsburgh region. The hill opposite downtown across the Monongahela River was called Coal Hill for a long time before getting the more upscale name of Mount Washington. I've worked on a facility adjacent to the Bureau of Mines location where Chris Mark worked. The Bureau of Mines headquarters was adjacent to CMU where I earned my degrees.
A significant part of my career involved coal preparation plants, coal-fired power plants, and coke ovens. Coal and coal mining have been of interest and concern to me almost all of my life. Nonetheless, that story told me quite a bit that I didn't know and reinforced opinions I held about some companies involved in the mining industry.
The changes in the regulatory environment that will flow out of the overturn of "Chevron deference" by the US Supreme Court are likely to be more impactful to the citizenry as a whole than the overturn of "Roe v. Wade." The weakening of the ability of government agencies to study problems like mine roof falls and promulgate solutions will be greatly inhibited.
Big Al