High-Voltage Transmission Line Permitting
The Minnesota Public Utilities Commission is responsible for permitting high-voltage transmission lines with a capacity of 100 kilovolts or more and over 1,500 feet in length.
Review processes
The Commission utilizes two methods for reviewing route permit applications for high-voltage transmission lines: the Standard Review Process and the Major Review Process. The chosen review process is determined by the size of the proposed high-voltage transmission line project as follows:
The Commission utilizes two methods for reviewing route permit applications for high-voltage transmission lines: the Standard Review Process and the Major Review Process. The chosen review process is determined by the size of the proposed high-voltage transmission line project as follows:
The permitting process explained
Standard Review
- High-voltage transmission lines with a capacity between 100 and 300 kilovolts
- High-voltage transmission lines with a capacity of 300 kilovolts or more that are either 1) less than 30 miles in length or 2) located along existing high-voltage transmission line right-of-way for at least 80 percent of the route.
Application submission and completeness determination
A person that seeks to construct a high-voltage transmission line must apply to the Commission for a permit. Upon receipt of the permit application the Commission conducts an initial review of the application to ensure it includes all the information legally required by Minnesota Statutes about the proposed project and its potential impacts on the environment.
Public meeting
The Commission holds at least one public meeting near the proposed project after an application is deemed complete. During the meeting state staff explain the permitting process and the applicant describes the proposed project. This is followed by a question and comment period for interested persons to identify major issues and potential impacts, alternative sites and routes, and potential conditions to be considered in the draft permit and potentially the scope of the environmental assessment (EA) addendum, if determined necessary. A written comment period is open for at least 10 days following the public meeting.
Draft permit
The commission must prepare and approve a draft permit for the proposed project upon the conclusion of the public comment period following the public meeting. The draft permit must identify the permittee, describe the proposed project, and include proposed permit conditions. A draft permit does not authorize a person to construct the proposed project. The Commission may change the draft permit in any respect before final issuance or may deny the permit.
Environmental review
An EA is required for projects considered under the Standard Review Process. The EA is prepared by the applicant and must be submitted with the permit application. Comments on the EA are solicited during the public meeting, and if necessary, an EA addendum scoping document is prepared. Once the Commission has approved the EA addendum scoping document, preparation of the EA begins. Following completion of the EA addendum the public is provided opportunity to comment on the completed EA addendum during the subsequent public hearings and during associated written comment period. Before making a decision on a permit, the Commission must consider the environmental assessment, any addendum to the environmental assessment, and the entirety of the record related to human and environmental impacts.
Public hearings
A public hearing is held once the EA has been completed. The hearing is conducted by an administrative law judge from the Office of Administrative Hearings. Any person may appear at the hearings and ask questions, offer testimony and exhibits without the necessity of intervening as a formal party to the proceedings. Following the public hearing, a written comment period is open for at least at least 10 days. Following the close of the written comment period, the administrative law judge prepares findings of fact, conclusions of law, and recommendations (ALJ Report) on the merits of the proposed project and on the draft permit for the Commission to consider along with the rest of case record.
Final permit decision
Following the close of the public hearing administrative record, the filing of the ALJ Report, and an exception period, the Commission reviews the full record related to the human and environmental impacts of the proposed project and makes a final decision on a permit.
The Commission must permit large energy infrastructure facilities in an orderly manner that is consistent with environmental preservation and the efficient use of resources by selecting locations that minimize adverse impacts on humans and the environment while ensuring the reliability and integrity of the electric power system.
Timing
A final decision on a permit application must be made within six months of the date the Commission determines an application is complete. The Commission may extend the time limit for up to three months for just cause or upon agreement with the applicant.
Relevant statutes and rules
To learn more about relevant statutes and rules, visit the Office of the Revisor of Statutes: Minnesota Statutes chapter 216I and Minnesota Rules chapter 7850.

Major Review
High-voltage transmission lines greater than 300 kilovolts that are either 1) greater than 30 miles in length or 2) not located along existing high-voltage transmission line right-of-way for at least 80 percent of the route.
Application submission and completeness determination
A person that seeks to construct a high-voltage transmission line must apply to the Commission for a permit. Upon receipt of the permit application the Commission conducts an initial review of the application to ensure it includes all the information legally required by Minnesota Statutes about the proposed project and its potential impacts on the environment.
Public meeting
The Commission holds at least one public meeting near the proposed project after an application is deemed complete. During the meeting state staff explain the permitting process and the applicant describes the proposed project. This is followed by a question and comment period for interested persons to identify major issues and potential impacts, alternative sites and routes, and potential conditions to be considered in the draft permit and the scope of the environmental impact statement (EIS). A written comment period is open for at least 10 days following the public meeting.
Draft permit
The commission must prepare and approve a draft permit for the proposed project upon the conclusion of the public comment period following the public meeting. The draft permit must identify the permittee, describe the proposed project, and include proposed permit conditions. A draft permit does not authorize a person to construct the proposed project. The Commission may change the draft permit in any respect before final issuance or may deny the permit.
Environmental review
An EIS is required for projects considered under the Major Review Process. As previously stated, comments are solicited during the public meeting to help prepare the EIS scoping document. Once the Commission has approved the EIS scoping document, preparation of the draft EIS begins. Following completion of the draft EIS the public is provided an opportunity to comment on the draft EIS at the subsequent public hearings and associated written comment period. After the close of the written comment period on the draft EIS, a final EIS is prepared that must address timely substantive comments received on the draft EIS. The Commission must ultimately make a decision on the adequacy of the final EIS before making a final decision on a permit.
Public hearings
A public hearing is held once the EIS has been completed. The hearing is conducted by an administrative law judge from the Office of Administrative Hearings. Any person may appear at the hearings and ask questions, offer testimony and exhibits without the necessity of intervening as a formal party to the proceedings. Following the public hearing, a written comment period is open for at least at least 20 days. Following the close of the written comment period, the administrative law judge prepares findings of fact, conclusions of law, and recommendations (ALJ Report) on the merits of the proposed project and on the draft permit for the Commission to consider along with the rest of case record.
Important! The Commission may designate a portion of the public hearing to be conducted as a contested case proceeding under Minnesota Statutes chapter 14. The decision on whether to require a contested case is decided at the time the Commission make a determination on the draft permit and EIS scoping document. The contested case process involves parties presenting evidence, cross-examining witnesses, and arguing their case, much like a regular court case. However, these proceedings are also open to the public and all persons have the opportunity to participate without the necessity of becoming an official party. The administrative law judge manages discovery, conducts pre-hearing conferences, and oversees a court-like public and evidentiary hearings. Formal participants including the applicant, intervenors, and state agencies may present arguments, evidence, and expert testimony.
Final permit decision
Following the close of the public hearing administrative record, the filing of the ALJ Report, and an exception period, the Commission reviews the full record related to the human and environmental impacts of the proposed project and makes a final decision on a permit.
The Commission must permit large energy infrastructure facilities in an orderly manner that is consistent with environmental preservation and the efficient use of resources by selecting locations that minimize adverse impacts on humans and the environment while ensuring the reliability and integrity of the electric power system.
Timing
A final decision on a permit application must be made within one year of the date the Commission determines an application is complete. The Commission may extend the time limit for up to three months for just cause or upon agreement with the applicant.
Relevant statutes and rules
To learn more about relevant statutes and rules, visit the Office of the Revisor of Statutes: Minnesota Statutes chapter 216I and Minnesota Rules chapter 7850.

Get Involved
Members of the public are encouraged to provide comments on any matter before the PUC at any time. You can also send comments or contact the PUC about regulatory matters.
Our decision-making is better when we hear from Minnesotans like you. Public input is essential to a fair and reasonable decision making process. Learn more about the PUC's work and how to get involved by watching PUC videos.
The PUC maintains a list of Dockets currently accepting comments. Comments are added to the record and can make a difference in PUC decisions. To see what Dockets are currently open for comment, go here
Other Resources
Other resources regarding permitting, our process and more.
Certificate Of Need
Certain large electric generating facilities and large high-voltage transmission lines are required by law to obtain a certificate of need
Permit changes
The PUC has the authority to amend, revoke or transfer a permit for a large energy infrastructure project.
Permitting guidance
This page provides essential guidance documents and resources for project proposers navigating the energy infrastructure permitting process.
Landowner rights
If a utility company plans to build transmission lines on or near your property, understanding your rights as a landowner is essential.
Proposed transmission lines in the permitting process
Docket Number | Project Name | Description |
---|---|---|
ET2/TL 08-1474 | Brookings County - Hampton Transmission Line Project | A 237-mile 345 kilovolt (kV) transmission line and associated facilities running from Brookings County, South Dakota, to Hampton, Minnesota. The project began operation in 2015. |
TL-23-157 | Mankato to Mississippi River Transmission Project | Proposed construction and operation of approximately 130 miles of 345 kV transmission line from the Wilmarth Substation in Mankato, MN to the Mississippi River near Kellogg, MN. The project will also include the construction of new 161 kV… |
CN-23-504, TL-23-388 | Wabasha 161 kV Relocation Project | Dairyland Power Cooperative has submitted a joint Certificate of Need and Route Permit Application to the Minnesota Public Utilities Commission to relocate approximately 13.3 miles of 161-kilovolt (kV) high voltage transmission line (HVTL) and… |
TL-23-410 | Pilot Knob to Burnsville Rebuild and Upgrade Project | The Commission issued a route permit to Great River Energy to rebuild an existing 69 kV transmission line in Eagan and Burnsville as 115 kV transmission line. |
TL-22-415, CN-22-416 | Northland Reliability 345 kV Transmission Line Project | Minnesota Power and Great River Energy propose to construct approximately 140 miles of new double-circuit 345 kV transmission line and to replace approximately 40 miles of existing transmission line with double-circuit 345 kV transmission line. The… |
TL-23-159 | Alexandria to Big Oaks 345 kV Transmission Line Project | Xcel Energy proposes to string approximately 105-108 miles of new transmission line on existing double-circuit capable structures running from the existing Alexandria Substation in Alexandria, Minnesota to Becker, Minnesota, where new transmission… |
ET2/TL-23-170 | Cedar Lake 115 kV HVTL Reroute Project | Great River Energy proposes to construct a new 6.3 mile long 115 kV transmission line in Rice County and Scott County. |
TL-22-611; CN-22-607 | Minnesota Power HVDC Modernization Project | To modernize the Minnesota terminal of the existing Square Butte high voltage direct current (HVDC) line that runs from North Dakota to Northeast Minnesota, a new terminal, new substation, and three high voltage transmission lines are proposed on a… |
22-132 | Minnesota Energy Connection | Xcel Energy has applied for a certificate of need to construct two approximately 160- to 180-mile 345 kilovolt transmission lines and associated facilities connecting the Sherburne County Generation Station Substation (Sherco Substation) in Becker,… |
E015/TL-21-141 | Duluth Loop Reliability Project | On October 21, 2021, Minnesota Power (Applicant) submitted a Certificate of Need (CN) Application and a high voltage transmission line (HVTL) Route Permit Application (RPA) to the Minnesota Public Utilities Commission (Commission). The RPA is… |
IP7013/TL-19-621 | Big Bend Wind 161 kV Transmission Line | Big Bend Wind, LLC has proposed the construction and operation of an 18 mile long 161 kilovolt (kV) high voltage transmission line (HVTL) to be located in Cottonwood, Martin, and Watonwan Counties, Minnesota. The proposed 161 kV HVTL is proposed to… |
TL-18-701 | Plum Creek Wind Farm 345 kV Transmission Line | Plum Creek Wind Farm, LLC proposes to construct a 414 megawatt (MW) wind farm and associated transmission line in Cottonwood, Murray, and Redwood County, Minnesota. The transmission line is proposed to be a 345 kilovolt (kV) line, with a length of… |
TL-20-867 | Dodge County Wind 161 kV Transmission Line | Dodge County Wind proposes to construct approximately 27 miles of 161 kV transmission line in Dodge and Mower counties in Minnesota. |