Enbridge Energy (Enbridge) is proposing to construct a new oil pipeline in Minnesota to replace its existing Line 3 pipeline. The new pipeline will follow the existing Line 3 pipeline from North Dakota to the Clearbrook Terminal in Clearwater County, Minnesota. From the Clearbrook Terminal eastward, Enbridge proposes that the pipeline be constructed in a new right-of-way, south of the existing Line 3, ending at an existing terminal in Superior, Wisconsin. Enbridge is proposing that the existing Line 3 pipeline be permanently deactivated and remain in place.
The purpose of the project is to address pipeline integrity and safety concerns related to the existing Line 3 and to restore the throughput of the line to its original operating capacity of 760,000 barrels per day (bpd).
Enbridge will need multiple approvals from state agencies, including the Minnesota Pollution Control Agency, in order to proceed. The MPCA's role is to protect water, land and air, which it does, in part, through the environmental permitting process. The permits the company would need from the MPCA are described below.
When any facility submits an application to MPCA to obtain a permit, technical staff review the application and evaluate whether the facility can meet applicable environmental regulations and standards. If so, the MPCA then develops facility-specific permit conditions. These permit conditions ensure that all standards are met by limiting the type and amount of water discharges or air emissions, specifying how the facility must be operated, and describing monitoring that must be conducted.
Once drafted, most permits require a formal public notice where the draft permits are made available for public review and comment. After public notice, the permits are revised to reflect any changes to address comments from the public. To issue the permit, the MPCA must be satisfied that the permit provides for meeting all applicable rules and regulations and that the applicant will comply with all conditions of the permit.
For the proposed Enbridge Line 3 project, the MPCA’s role involves the following:
- Air quality permit
- 401 water quality certification
- Construction stormwater permit
- Industrial wastewater permit
The public is encouraged to provide comments on draft permits during the formal public comment periods. All written comments received during the comment periods are considered and responded to. Comments can and often do result in changes to the final permit.