Listen to recordings of the telephone town hall meetings:
- Thursday, April 2, 2020 – Listen to a recording of the event
- Tuesday, April 7 – Listen to a recording of the event
- Thursday, April 9 – Listen to a recording of the event
Learn more about the project

An overview of the Minnesota Pollution Control Agency's role in Enbridge's Line 3 Replacement Project, and the permits and certifications the MPCA is considering.
Public comment is now closed
The MPCA’s comment period for the draft 401 water quality certification, draft National Pollutant Discharge Elimination System/State Disposal System wastewater permit and draft capped air emission permit application for Enbridge’s Line 3 project ran from March 2, 2020 – April 10, 2020.
- View public comments submitted for the draft 401 water quality certification
- View public comments submitted for the draft Clearbrook Terminal capped air emission permit
- View public comments submitted for the draft industrial wastewater discharge permit
Infographic: How to make an effective public comment
Information and fact sheets
Videos about the Enbridge Line 3 replacement project:
- Overview: Line 3 replacement project
- MPCA's role in the Line 3 replacement project
- The permit process
- Accountability
- How public comments make permits better
Capped air emission permit
401 Certification
- Webpage: 401 Certification for Enbridge Line 3
Clean Water Act Section 401 water quality certification (wq-gen2-19)
Information for 401 Water Quality Certification for Line 3 (wq-wwprm1-54c)
Map: Horizontal directional drilling (HDD) crossings
Map: Wild rice water crossings
Examples: Impacts on wetlands and methods of mitigation
Industrial wastewater permit
- Webpage: Industrial wastewater permit for Enbridge Line 3
Introduction to wastewater permits
Information for industrial wastewater permit for Enbridge Line 3 (wq-wwprm1-56a)
Map: Hydrotest and buoyancy control discharge locations
Map: Wild rice surface water discharge locations
Hydrostatic pressure testing methods and discharge options
Construction stormwater permit
Emergency response