Federal Mine Rule Retires a One-Opening Pillar-Mining Scenario
Published Date: 11/12/2026
Rule
Summary
MSHA is scrapping old rules about mining pillars with just one mine opening because no one does that anymore—it’s unsafe! This change affects underground coal mines and kicks in on December 14, 2026. It won’t cost miners safety but will clear out outdated rules, making mining regulations simpler and safer.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Ban on single‑opening pillar mining
MSHA removed 30 CFR 75.386, which had permitted final mining of pillars with only one mine opening if no more than 20 miners were in the mine and the distance between the mine opening and working face did not exceed 500 feet. As of December 14, 2026, the allowance is rescinded and operators must follow the two‑escapeway requirements in Sec. 75.380 (bituminous/lignite) and Sec. 75.381 (anthracite).
No new cost burden for mine operators
MSHA states removing Sec. 75.386 will not impose new costs on underground coal mine operators because the single‑opening final pillar mining practice is no longer used. MSHA also certified the rule will not have a "significant economic impact on a substantial number of small entities." The final rule is effective December 14, 2026.
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Key Dates
Department and Agencies
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