Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Final 2026 Interim Site- Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp) (Dated August 28, 2026),
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Final 2026 Interim Site- Wide Surface Water Monitoring Quality Assurance Project Plan (Qapp) (Dated August 28, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Final 2026 Interim Site-Wide Groundwater Monitoring Quality Assurance Project Plan (Dated August 28, 2026),
2026
Environmental Protection Agency
Re: Approval Letter For The Final 2026 Interim Site-Wide Groundwater Monitoring Quality Assurance Project Plan (Dated August 28, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft 2025 Groundwater Monitoring Data Summary Report January – December 2025 (Dated May 29, 2026),
2026
Environmental Protection Agency
Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Draft 2025 Groundwater Monitoring Data Summary Report January – December 2025 (Dated May 29, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Butte Reduction Works Smelter Area Intermediate 60% Remedial Design Submittal (Dated May 19, 2026),
2026
Environmental Protection Agency
Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou) Butte Reduction Works Smelter Area Intermediate 60% Remedial Design Submittal (Dated May 19, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 9 – Clark Street Dump,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 9 – Clark Street Dump, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Quality Assurance Project Plan (Qapp) (Dated August 14, 2026),
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Quality Assurance Project Plan (Qapp) (Dated August 14, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 180 – Tullamore Dump,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 180 – Tullamore Dump, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 160s – Syndicate Pit Dumps,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 160s – Syndicate Pit Dumps, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling And Investigation Plan: Ur-53 – South Of Surprise Dump,
2026
Atlantic Richfield Company
Re: Butte Priority Soils Operable Unit Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling And Investigation Plan: Ur-53 – South Of Surprise Dump, Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit Draft Final 2023 Insufficiently Reclaimed Sites Sampling: Bres No. 93 – Soudan Dump Site Evaluation Summary Report,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit Draft Final 2023 Insufficiently Reclaimed Sites Sampling: Bres No. 93 – Soudan Dump Site Evaluation Summary Report, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 68 – Little Mina-2,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 68 – Little Mina-2, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 75 – National Dump,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 75 – National Dump, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Quality Assurance Project Plan (Qapp) Revision 0 (2026) Request For Change (Rfc)-2026-001 (Dated September 8, 2026),
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Quality Assurance Project Plan (Qapp) Revision 0 (2026) Request For Change (Rfc)-2026-001 (Dated September 8, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 57 – Little Mina-1,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 57 – Little Mina-1, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 171 – Blaine Center,
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 171 – Blaine Center, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Uncontrolled Surface Flow Areas Drainage C 95% Design Remedial Action Work Plan,
2026
Environmental Protection Agency
Re: Approval Letter For The Uncontrolled Surface Flow Areas Drainage C 95% Design Remedial Action Work Plan, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Conditional Approval Letter For Butte Priority Soils Operable Unit (Bpsou) Final Diggings East Dewatering Treatability Study Pre-Design Investigation Work Plan (Pdiwp) (Dated September 8, 2026) And The 2026 Final Diggings East Dewatering Treatability Study Quality Assurance Project Plan (Qapp) (Dated September 8, 2026),
2026
Environmental Protection Agency
Re: Conditional Approval Letter For Butte Priority Soils Operable Unit (Bpsou) Final Diggings East Dewatering Treatability Study Pre-Design Investigation Work Plan (Pdiwp) (Dated September 8, 2026) And The 2026 Final Diggings East Dewatering Treatability Study Quality Assurance Project Plan (Qapp) (Dated September 8, 2026), Emma Rott
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Revised Draft Final Annual Operations And Maintenance (O&M) Report: Butte Treatment Lagoon (Btl) System – 2025,
2026
Montana Tech Library
Revised Draft Final Annual Operations And Maintenance (O&M) Report: Butte Treatment Lagoon (Btl) System – 2025, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites: Ur-42 Site Evaluation Summary Report (Sesr) (Dated July 22, 2026),
2026
Environmental Protection Agency
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites: Ur-42 Site Evaluation Summary Report (Sesr) (Dated July 22, 2026), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) 2026 Final Backfill And Cover Soil Quality Assurance Project Plan (Qapp) Dated August 26, 2026,
2026
Environmental Protection Agency
Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) 2026 Final Backfill And Cover Soil Quality Assurance Project Plan (Qapp) Dated August 26, 2026, Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
