Montana Redefines Mining Mess: DIY Water Reports Allowed
Published Date: 8/4/2025
Proposed Rule
Summary
Montana wants to update its mining rules after passing a new law in 2025. These changes affect how mining damage is defined and let permit applicants submit their own water impact info if official data isn’t available. People can comment or ask for a hearing before the updates take effect, so stay tuned!
Analyzed Economic Effects
2 provisions identified: 1 benefits, 0 costs, 1 mixed.
New 'Material damage' definition for mining
Montana proposes a new definition of "Material damage" tied to the hydrologic balance, alluvial valley floors, and subsidence following passage of Montana House Bill 587 (HB 587) in the 2025 legislative session. If you are a mining permit applicant or operator in Montana, this changes the legal standard regulators will use to judge mining effects in those areas.
Permit applicants may submit self-collected hydrologic data
Montana's proposed amendment (from HB 587, 2025) would allow a permit applicant to provide self-collected information about probable hydrologic consequences when an appropriate Federal or State agency cannot provide such information. If you apply for a mining permit in Montana, you may be able to supply your own water-impact data instead of waiting for agency-provided data.
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Key Dates
Department and Agencies
Related Federal Register Documents
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2026-16318, North Dakota Regulatory Program
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Montana wants to update its mining rules to let companies use smart predictions and monitoring data when asking for bond releases, and to keep some bond money if certain pollution issues pop up. These changes come after a new state law passed in 2025 and could affect mining companies and the environment. The public can comment or ask for a hearing before the updates take effect.
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