I think this was accidentally resolved. I saw this note when looking at OSM note 4270355 and realized the map has not been updated. I was able to confirm this on MNDNR site at https://www.dnr.state.mn.us/news/2024/06/13/hill-annex-mine-state-park-permanently-closed-allow-mining-resume

I have updated the area to reflect that it is now a mine again.