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Most Recent Additions*

Draft Final Quarterly Operations and Maintenance Report: Butte Treatment Lagoon System – Fourth Quarter 2025
Pioneer Technical Services, Inc.

Draft 2025 Butte Priority Soils Operable Unit Residential Metals Abatement Program Construction Completion Report
Abby Peltomaa

Butte Priority Soils Operable Unit Grove Gulch Sedimentation Bay 100% Remedial Design/Remedial Action Re-Submittal
Josh Bryson

Re: Conditional Approval Letter for Revised Clark Tailings Consolidated Waste Management Area (CTCWMA) Site Investigation Data Summary Report 2024 and Response to EPA Comment Letter (dated February 24, 2026)
Emma Rott

Draft Final Butte Priority Soils Operable Unit (BPSOU) Insufficiently Reclaimed Sites Sister Dump (BRES No. 38) Remedial Action Work Plan (RAWP)
Pioneer Technical Services, Inc.

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Draft Final Rock Creek Cattle Company Borrow Submittal #2 (dated February 4, 2026)
Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit - Draft Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 96 – Washoe Dump Site Evaluation Summary Report
Molly Roby

Re: Conditional Approval letter for the Butte Priority Soils Operable Unit Draft Final 2022 Insufficiently Reclaimed Sites Sampling: BRES No. 50 – Zelia Site Evaluation Summary Report
Molly Roby

Re: Approval letter for the Butte Priority Soils Operable Unit (BPSOU) 2022 Draft Final Insufficiently Reclaimed Sites Sampling: BRES No. 16 Site Evaluation Summary Report
Molly Roby

Re: Conditional Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Revised Butte Hill Revegetation Specifications (dated August 15, 2025)
Molly Roby

Re: Conditional approval letter with comments for the Draft Final 2026 Residential Metals Abatement Program (RMAP) Anselmo Mine Yard Development Plan (dated February 25, 2026)
Molly Roby

Re: Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2024 Stormwater Evaluation and Maintenance Report (dated February 27, 2026)
Emma Rott

Re: Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2023 Stormwater Evaluation and Maintenance Report (dated February 27, 2026)
Emma Rott

Re: Comment letter for the Butte Priority Soils Operable Unit (BPSOU) Draft 2022 Stormwater Evaluation and Maintenance Report (dated February 27, 2026)
Emma Rott

Re: Conditional Approval letter for the Butte Priority Soils Operable Unit (BPSOU) Butte Treatment Lagoons (BTL) Groundwater Treatment System Quarterly Operation and Maintenance Report – Quarter 3 2025 (dated December 23, 2025)
Emma Rott

Re: Comment letter for the 2020 through 2024 Surface Water Compliance Evaluation Technical Memorandums Silver Bow Creek Area NPL Site, Butte Priority Soils Operable Unit (BPSOU) Consent Decree-Civil Action No. CV89-039-BU-SHE (dated February 3, 2026)
Emma Rott

Re: Approval letter for the Final Repository Siting Study (RSS) Detailed Evaluation and Recommendations Report (dated February 11, 2026)
Emma Rott

Revised Draft Final Butte Priority Soils Operable Unit (BPSOU) Insufficiently Reclaimed Sites Josephine Shaft (BRES No. 37) Remedial Action Work Plan (RAWP)
Pioneer Technical Services, Inc.

Butte Medical Monitoring Working Group Meeting
Mike McAnulty and Eric Hassler

Butte Priority Soils Operable Unit Final Butte Hill Revegetation Specifications
Mike McAnulty

*Updated as of 04/12/26.