The new Mine Safety and Health Administration (MSHA) Silica Rule (30 CFR Part 60) became legally effective June 17, 2024, which originally set compliance for coal and underground mines by April 14, 2025 and for metal and nonmetal (MNM) mines by April 8, 2026. However, legal challenges by the plaintiffs and other mine operators have created a stay by the eighth circuit judge pending the outcome of the litigation. Currently, the original deadlines remain in effect.
