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 Categorical Exclusion for the Plentywood Wastewater Collection System Improvements - Phase 2 Project for the City of Plentywood, Montana CATEX December 2, 2019 January 2, 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 and Environmental Assessment Bigfork Bay Sewer Replacement Project for Bigfork, Montana FONSI/EA November 19, 2019 December 19, 2019 Jeremy Perlinski
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-4769
Notice of Publication of Categorical Exclusion for the City of Roundup, Montana, Phase 5 Water System Improvements Project CATEX November 15, 2019 December 15, 2019 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 Darby Wastewater Treatment Improvements Project for the Town of Darby CATEX November 4, 2019 December 4, 2019 Terry Campbell
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-7343
Notice of Publication of Finding of No Significant Impact and Environmental Assessment for the RAE Water and Sewer District #313 - Wastewater System Improvement Project, Bozeman FONSI & EA November 5, 2019 December 5, 2019

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

Notice of Publication of Finding Of No Significant Impact (FONSI) and Environmental Assessment (EA) for the City of Bozeman Davis Lane Lift Station/Norton East Ranch Interceptor Project FONSI & EA October 16, 2019 November 15, 2019 Michele Marsh
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5322
Notice of Publication of Finding Of No Significant Impact and Environmental Assessment for the Wastewater System Improvements Project for the Town of Ryegate FONSI & EA September 3, 2019 October 3, 2019 Terry Campbell
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-7343
Notice of Publication of Categorical Exclusion for Phase 4 Water System Improvements Project for the Town of Harlowton CATEX August 30, 2019 September 30, 2019 Robert Ashton
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5316
Notice of Publication of Finding No Significant Impact for Dry Prairie Rural Water Authority Westby Mainline Project FONSI August 23, 2019 September 23, 2019 Sandie Koenig
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6770
Notice of Publication of Finding No Significant Impact and Environmental Assessment for the Great Falls CMATP Storm Water Improvements Project FONSI & EA August 20, 2019 September 20, 2019 Terry Campbell
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-7343
Notice of Publication of Categorical Exclusion for Legg Lift Station Improvements Project for the Town of Malta CATEX August 12, 2019 September 12, 2019 Jeremy Perlinski
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-4769
Notice of Publication of Finding No Significant Impact and Environmental Assessment for the Town of Cascade Wastewater System Improvements Project FONSI & EA July 22, 2019 August 22, 2019 Michele Marsh
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5322
Notice of Publication of Categorical Exclusion for Four Mile Drive Transmission Main Project for the City of Kalispell CATEX July 24, 2019 August 24, 2019 Robert Ashton
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-5316
Notice of Publication of Categorical Exclusion for Lift Station & Lagoon Improvements for the Town of Broadus CATEX July 22, 2019 August 22, 2019 Mike Abrahamson
Montana Department of Environmental Quality
PO Box 200901
Helena, MT 59620-0901
Phone: (406) 444-6776
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