Environmental Assessments

The EAs listed in the links above are not included in the table located in the accordion below. If no current documents are listed below, please use the links above to look at specific categories of EAs.


Project Name

DEQ Determination

Issue Date
Removal or Response Date
Department Contact
Notice of Publication of Finding of No Significant Impact and Environmental Assessment for the Wastewater Improvements Project for the City of Thompson Falls, Montana FONSI/EA May 26, 2020 June 26, 2020 Mike Abrahamson
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6776
Notice of Publication of Finding of No Significant Impact for the Dry Prairie Rural Water Authority Scobey-Flaxville Branch Lines Project Phase I, Montana FONSI May 26, 2020 June 26, 2020 Sandie Koenig
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6770
Notice of Publication of Categorical Exclusion for the Water System Improvements Project, for the Basin County Water and Sewer District, Basin, Montana CATEX May 26, 2020 June 26, 2020 Sandie Koenig
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6770
Notice of Publication of Categorical Exclusion for the First Street West Water Improvements Project, for the Town of Plains, Montana CATEX May 21, 2020 June 21, 2020 Sandie Koenig
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6770
Notice of Publication of Categorical Exclusion for the Storage Facility 250K Standpipe Rehabilitation - ST002, for the Bigfork Water and Sewer District, Montana CATEX May 13, 2020 June 13, 2020 Denver Fraser
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5318
Notice of Publication of Categorical Exclusion for the Phase IV Water System Improvements Project for the Town of Cascade, Montana CATEX May 07, 2020 June 07, 2020 John McDunn
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6782
Notice of Publication of Categorical Exclusion for the Phase 5 Water System Improvements Project for the City of Sidney, Montana CATEX May 07, 2020 June 07, 2020 John McDunn
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6782
Notice of Publication of Categorical Exclusion for the Water System Improvements Project for the Town of Winifred, Montana CATEX April 22, 2020 May 22, 2020 John McDunn
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6782
Notice of Publication of Categorical Exclusion for Phase 2 Water System Improvements Project for the Town of Circle, Montana CATEX April 22, 2020 May 22, 2020 John McDunn
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6782
Notice of Publication of Finding of No Significant Impact and Environmental Assessment for the Water Supply Well No. 3 Project for the City of Columbia Falls, Montana FONSI/EA April 02, 2020 May 02, 2020 Robert Ashton
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5316
Notice of Publication of Finding of No Significant Impact and Environmental Assessment for the Water System Improvement Project for the Somers Water and Sewer District, Montana FONSI/EA February 28, 2020 March 29, 2020 Denver Fraser
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5318
Notice of Publication of Finding of No Significant Impact and Environmental Assessment for the Big Sky County Water and Sewer District 363 Water Resource Recovery Facility (WRRF) Improvements Project, for Big Sky, Montana FONSI & EA February 27, 2020 March 28, 2020

Terry Campbell
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-7343

Major Facility Siting Act Amendment for Talen Energy to utilize non-Rosebud Mine Seam Coal MFS Certificate Amendment May 10, 2019 N/A Craig Jones
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-0514
Major Facility Siting Act Amendment for Talen Energy to develop a Coal Handling Facility at Colstrip, Montana for non-Rosebud Coal MFS Certificate Amendment May 3, 2019 N/A Craig Jones
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-0514
Final Environmental Assesesment-Golden Sunlight Mine Apex Project Final Environmental Assessment October 2018 N/A Dan Walsh
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6791

Final Environmental Assessment for proposed West Glacier RV Park's associated water, wastewater, and stormwater and Response to Comments.

DRAFT EA February 2018

Press Release, May 14, 2018

Final Approval May 14, 2018 N/A Rachel Clark
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-4400