Brookings County - Hampton Transmission Line Project
Project Details
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.
Project Contact
Project Summary
The Commission issued a route permit for the 237-mile Brookings County to Hampton 345 kV transmission line in 2010, and the line was fully energized in 2015.
In November 2023, the CapX2020 Brookings Owners (Applicants) submitted a minor alteration application to the Commission seeking to install a second 345 kV circuit along two segmetns of the existing Brookings - Hampton 345 kV transmission line. The proposed change would happen on the 59.5-mile segment between the Brookings County and Lyon County substations and on the 39-mile segment between the Helena and Hampton substations. The Applicants have also applied to the Commission for a certificate of need for the project in August 2023 under Docket 23-200.
The Applicants indicated that the Project is needed to relieve current transmission congestion in this area. The Applicants plan to place the Western Segment in service by September 1, 2024, and the Eastern Segment in service by September 15, 2025.
Key Project Documents
| Date | Title | Description |
|---|---|---|
| March 22, 2024 | Environmental Report: 345 kV Brookings County-Lyon County and Helena-Hampton Second Circuit Project | The environmental report (ER) for the Brookings 2nd Circuit Project prepared by the Minnesota Department of Commerce. The ER analyzes the potential impacts of the project and possible mitigation measures. The ER also discusses the potential impacts of alternatives to the project itself. |
| December 12, 2023 | Application to the Minnesota Public Utilities Commission for a Minor Alteration of the CAPX2020 Brookings - Hampton Route Permit to Add the Brookings County - Lyon County and Helena - Hampton Second Circuit Project | Minor Alteration Application to add a second circuit to portions of the existing Brookings to Hampton 345 kV Transmission Line |
| November 22, 2023 | Certificate of Need Application: Brookings County - Lyon County and Helena - Hampton Second Circuit Project | Application for a Certificate of Need to add a second 345 kV circuit to portions of a second 345 kilovolt (kV) circuit on double-circuit-capable structures installed when the Brookings County – Hampton 345 kV transmission line was originally constructed. The Project will also require reconfiguring certain lines near substations, mostly within existing easements. |
| May 26, 2015 | Commission Order Approving Minor Alteration for Cedar Lake Project | Commission order approving a minor alteration for temporary use of the open position on structures 044 through 068 of the Brookings project to carry a new 115 kV line |
| July 18, 2013 | Commission Order Approving Minor Alteration and Issuing Permit Amendment (Amendment #5) | Commission order approving a minor alteration for the Brookings to Hampton project. The amendment addresses a change in the route between structures 0961-006 and 0961-010 in segment 6 of the project |
| October 15, 2012 | Commission Order Approving Minor Alteration and Issuing Permit Amendment (Amendment #4) | Commission order issuing a permit amendment for the Brookings to Hampton project. The amendment addresses a change in the route between structures 243 and 250 in segment 3 of the project |
| September 10, 2012 | Commission Order Approving Minor Alteration and Issuing Permit Amendment (Amendment #3) | Commission order issuing a permit amendment for the Brookings to Hampton project. The amendment addresses the use of quadruple circuit specialty structures for the project |
| July 10, 2012 | Commission Order Approving Minor Alterations and Issuing Permit Amendment (Amendment #2) | Commission order issuing a permit amendment for the Brookings to Hampton project. The amendment addresses modifications in segment 3 of the project related to engineering constraints and landowner concerns |
| February 29, 2012 | Commission Order Approving Minor Alterations and Issuing Permit Amendment (Amendment #1) | Commission order issuing a permit amendment for the Brookings to Hampton project. The amendment addresses new maps, the size and location of the Hampton substation, and the number of conductors spanning Interstate 35 |
| March 1, 2011 | Route Permit for the Brookings to Hampton 345 kV Transmission Line Project | The Commission's route permit addendum for segment 4 of the Brookings to Hampton project, including links to route permit maps |
| September 14, 2010 | Route Permit for the Brookings to Hampton 345 kV Transmission Line Project | The Commission's route permit for segments 1, 2, 3, 5, and 6 of the Brookings to Hampton project, including links to route permit maps |
| January 26, 2010 | Brookings-Hampton Transmission Project Final Environmental Impact Statement | The Final EIS responds to timely substantive comments received on the Draft EIS consistent with the Scoping Decision Document. The Final EIS also contains corrections/revisions to the Draft EIS. The Draft EIS and Final EIS serve as the complete EIS for the proposed project |