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Butte Priority Soils Operable Unit (BPSOU) 2025 Monthly Progress Report. Consent Decree for the Butte Priority Soils Operable Unit. Civil Action No. CV 89-039-BU-SEH
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Re: Comment Letter for Draft Clark Tailings Consolidated Waste Management Area (CTCWMA) 2024 Data Summary Report (dated October 15, 2025)
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2026 Revised Draft Final BPSOU Backfill and Cover Material Quality Assurance Project Plan (QAPP)
No full textRe: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Draft Final 2022 Unreclaimed Sites Sampling: UR-22 Site Evaluation Summary Report (dated December 10, 2025)
No full textRe: Conditional Approval Letter for the Draft Final Butte Reduction Works (BRW) Smelter Area Mine Waste Remediation and Contaminated Groundwater Hydraulic Control Site Pre-Design Investigation (PDI) Evaluation Report (dated September 12, 2025)
No full textFinal Annual Operations and Maintenance (O&M) Report: Butte Treatment Lagoon (BTL) System – 2023
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