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Most Recent Additions*

Butte Mine Flooding Operable Unit Berkeley Pit and Discharge Pilot Project - May 2024 Monthly Discharge Monitoring Report
Mark Thompson and Dave Griffis

Butte Mine Flooding Operable Unit Berkeley Pit and Discharge Pilot Project - July 2024 MOnthly Discharge Monitoring Report
Mark Thompson and Dave Griffis

Silver Bow Creek/Butte Area NPL Site Butte Priority Soils Operable Unit, Remedial Design Documents for the Blacktail Creek Area Groundwater Hydraulic Control System
Josh Bryson

BUTTE MINE FLOODING SITE CD, CV 02-35 Bu-RFC, 2024 Second Quarter Report
Mark Thompson and Dave Griffis

Approval of: Berkeley Pit and Discharge Pilot Project, Discharge System Operations and Maintenance Manual, 2024 Update , dated April 23, 2024
Jason Rappe

Approval of: Discharge System 2023 Annual Operations and Maintenance Report, Berkeley Pit and Discharge Pilot Project, dated May 20, 2024
Jason Rappe

Approval for Draft Final 2022 Annual Monitoring Report for the Rocker Timber Framing and Treating Plant Operable Unit; dated April 6, 2023
Nikia Greene

Approval for: Draft Final Fourth Quarter 2022, Operations & Maintenance Monitoring Report for the Rocker Timber Framing and Treating Plant Operable Unit; dated January 10, 2023.
Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit, 2021 Unreclaimed Site Sampling – Revised Clark Mill Tailings East (UR-40) Site Evaluation Summary Report (March 28, 2023)
Nikia Greene

Final Butte Priority Soils Operable Unit (BPSOU) 2021 Unreclaimed Sites Sampling – UR-39 Site Evaluation Summary Report (dated January 4, 2023)
Nikia Greene

Approval letter for the Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-38 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

Approval letter for: Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-36 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

Approval letter for: Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-35 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

Approval of the Final Butte Priority Soils Operable Unit, Revised 2021 Unreclaimed Sites Sampling – Desperation Shaft (UR-34) Site Evaluation Summary Report (March 17, 2023)
Nikia Greene

Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-33 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit, Final 2021 Unreclaimed Sites Sampling UR-32 Site Evaluation Summary Report (dated June 9, 2023)
Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit, Final 2021 Unreclaimed Sites Sampling UR-30 Site Evaluation Summary Report (dated April 20, 2023)
Nikia Greene

Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-24 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

Approval letter for the Butte Priority Soils Operable Unit, Draft Final Unreclaimed Sites (UR-06) Temporary Best Management Practice (BMP) Work Plan (May 15, 2023)
Nikia Greene

Approval letter for the Final Butte Priority Soils Operable Unit, 2021 Unreclaimed Sites Sampling UR-05 Site Evaluation Summary Report (February 7, 2023)
Nikia Greene

*Updated as of 11/20/24.