The White House Gave Two Marquette County Mines Two More Years on the First Federal Mercury Rule for Taconite. One of Them Has Not Made a Pellet Since 2016.
Proclamation 10958 names Tilden and Empire. It is a two-year deferral, not a full exemption, it dates to July 2025, and EPA never expected Tilden to need mercury controls. Its problem was hydrochloric acid.
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