Brookings County-Hampton 345 kV
The Brookings County-Hampton transmission line will
improve reliability throughout southwest and west
central Minnesota and the Twin Cities as well as
enable access to new generation, including renewable
energy resources in the area. The new line will be
constructed from a new substation in Brookings County,
South Dakota, to a new substation in Hampton, Minnesota.
The project was granted a Route Permit (docket 08-1474) from the Minnesota Public Utilities Commission (MN PUC) on July 15, 2010 for approximately 175 miles of the 240-mile route, or the sections between the Brookings County, South Dakota substation and the new Cedar Mountain substation in Renville County and between the new Helena and Hampton substations. On February 3, 2011, the MN PUC approved the Minnesota River crossing at Belle Plaine. This approval finalized the last segment of the project route between the Cedar Mountain substation (Renville County) and the Helena substation (Scott County).
The segment between the Lyon County and Helena substations
will be constructed as a double circuit transmission
line. The other segments will be constructed with
double circuit capable structures; only a single
circuit will be energized after initial construction.
Single pole steel structures will be used to reduce
land impacts. Structures are between 140 and 170
feet tall and will be between 800 and 1,000 feet
apart. Typically, a 150-foot right-of-way will be
The MN PUC must grant two approvals
before construction – a
Certificate of Need and a Route Permit. An environmental
report was prepared by the Department of Commerce,
Office of Energy Security during the need process,
and an Environmental Impact Statement was written
The Minnesota Public Utilities Commission on April 4, 2013 re-affirmed the original alignment for an approximately two-mile segment of the Brookings County-Hampton project in eastern Scott County.
A map of the route in the area can be found here.
The South Dakota Public Utilities
Commission must issue a Facility Permit before transmission