2026
Section 401 - Water Quality Certifications for 2026 Nationwide Permits
2026 Montana Department of Environmental Quality (DEQ)
Section 404
2026 Nationwide Permit – Fact Sheets
2026 NW Permit 23 - Approved Categorical Exclusions
2026 NW Permit 33 - Temporary Construction Access and Dewatering
2026 Montana Regional Conditions – Permit Fact Sheets
2026 Montana Regional Conditions - Applicable Statewide2021
Section 401 - Water Quality Certifications for 2021 Nationwide Permits
2021 Blackfeet Nation
2021 Confederated Salish and Kootenai Tribes
2021 Environmental Protection Agency (EPA)
2021 Fort Peck Tribes
2021 Montana Department of Environmental Quality (DEQ)
2021 Northern Cheyenne Tribe
Section 404 - 2021 Nationwide Permit Fact Sheets
2021 NW Permit 3 - Maintenance
2021 NW Permit 5 - Scientific Measurement Devices
2021 NW Permit 6 - Survey Activities
2021 NW Permit 7 - Outfall Structures and Associated Intake Structures
2021 NW Permit 13 - Bank Stabilization
2021 NW Permit 14 - Linear Transportation Crossings
2021 NW Permit 18 - Minor Discharges
2021 NW Permit 19 - Minor Dredging
2021 NW Permit 23 - Approved Categorical Exclusions
2021 NW Permit 25 - Structural Discharges
2021 NW Permit 27 - Aquatic Habitat Restoration/Establishment/Enhancement
2021 NW Permit 33 - Temporary Construction Access and Dewatering
2021 NW Permit 40 - Agricultural Activities
2021 NW Permit 41 - Reshaping Existing Drainage Ditches
2021 NW Permit 42 - Recreational Facilities
2021 NW Permit 43 - Stormwater Management Facilities
2021 NW Permit 45 - Repair of Uplands Damaged by Discrete Events