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Minnesota Power, Duluth Port reach wind shipment milestone


Duluth, Minn.—-  July 18, 2014 -------   Minnesota Power and the Duluth Port will reach a milestone
this weekend when the 15th ship bearing wind generation equipment destined for
Minnesota Power’s growing renewable energy installation in North Dakota sails into the
harbor beneath the Aerial Lift Bridge.

The BBC cargo ship, Peter Roenna is expected to arrive in Duluth late Sunday night carrying over
two dozen renewable wind energy components after a voyage from Brande, Denmark, where the
equipment is manufactured by Siemens A.G. Two other shiploads of Siemens wind equipment
bound for North Dakota arrived at the port in June; two more are expected before the end of

Since the port first started handing these project cargoes for Minnesota Power, a total of 15
shiploads of wind energy equipment – including these nacelle cooling units and generators – have
crossed the Atlantic Ocean, sailing through the Saint Lawrence Seaway and across the Great
Lakes into Duluth. The components are then loaded onto trucks for delivery to the Bison Wind
Energy Center near New Salem, N.D.

The first shipments in 2006 included blades for a 98-megawatt wind farm in Oliver County, N.D.
from which Minnesota Power purchases all the electric generation. That wind installation was
constructed, and is owned by, NextEra Energy. Minnesota Power subsequently built the first three
phases of its Bison Wind Energy Center adjacent to the initial wind farm located in Oliver County
about a 90-minute drive east of Bismarck, N.D.

Bison 4, a 205-megawatt addition to the wind farm, will utilize larger, more powerful Siemens wind
turbine generators (WTGs) than those installed last year in phases 2 and 3 of the project. Because
the generators are more powerful, it will take only 64 turbines to produce about the same amount of
electricity produced by 70 turbines in last year’s installation. Once operational, Bison 4 will push
Minnesota Power past the 25 percent renewable energy goal established by Minnesota legislation
11 years ahead of schedule.

The first of the 64 new wind turbine generators was erected and installed earlier this month. A
nacelle was attached to the top of the first Bison 4 tower July 2, and three days later, three wind
turbine blades attached to a hub were “flown” to the tower top. Two large crawler cranes are
positioned to continue Bison 4 assembly throughout the summer.

“This latest shipment of wind components is meaningful on several levels,” said Dave McMillan,
senior vice president of external affairs at ALLETE and executive vice president of Minnesota
Power. “It turns a spotlight on the global nature of sustainable energy and the importance of
efficiently transporting goods and services. This international ship’s arrival represents the
resourcefulness Minnesota Power has shown in striving to reach the renewable energy mandate.”

McMillan also serves on the Saint Lawrence Seaway Development Corporation’s Advisory Board.

Windmill Generators Duluth
The Clure Public Marine Terminal – this Port’s only general cargo terminal – is owned by the Duluth
Seaway Port Authority and operated by Lake Superior Warehousing. “The strategic location of this
port, the capacity of this facility, and the quality of LSW’s workforce has earned Duluth a worldclass
reputation for efficient cargo handling, secure storage and delivery, particularly for shippers of
dimensional cargo,” noted Vanta Coda, Port Authority executive director. “We are pleased to have
been able to serve as a transport hub for Minnesota Power’s wind projects since their launch, and
congratulate them on meeting the 25 percent renewable energy goal more than a full decade ahead
of the state’s 2025 goal.”

This year, to make delivery even more efficient, the generators were separated at the manufacturer
from the back ends (main body) of each nacelle, rather than being shipped together as one large
dimensional unit as in previous years. Dividing the huge power units into two parts makes them
easier to transport by truck, eliminating the requirement to hire extra “flag crew” vehicles to
accompany the trucks from the Port of Duluth to New Salem.

“We appreciate the support, the trust placed in us by Minnesota Power,” added Jonathan Lamb,
LSW president. “We’ve forged a close working relationship over these many years. We also know
how much moving their project cargo through the Port of Duluth also supports the greater business

Tower sections, manufactured in Manitowoc, Wis., using steel produced with Minnesota iron ore,
will be transported through Hinckley and Brainerd on their way to Bison as construction continues.
With a portion of the nacelle units now manufactured at a Siemens plant in Hutchinson, Kan. and
the turbine blades fabricated in Fort Madison, Ia. Bison 4 will have more American-made
components than the earlier Bison phases.

Minnesota Power provides electric service within a 26,000-square-mile area in northeastern
Minnesota, supporting comfort, security and quality of life for 144,000 customers, 16 municipalities
and some of the largest industrial customers in the United States. More information can be found


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