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Wind turbine maker Siemens Gamesa has won the turbine supply contract for the Southern Hills Expansion project in the US state of Iowa.

The contract was awarded by project developer MidAmerican Energy Company, and includes three-and-a-half-year operations and maintenance contracts for the site.

The project will see an additional 21 of Siemens Gamesa’s SG 43.5-145 turbines installed, which offer a flexible rating ranging from 4.2 to 4.8 MW, increasing its adaptability to an individual project.

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The firm has installed more than 10,000 wind turbines across the US, to-date, representing a combined 20GW of installed capacity, with around 1,400 turbines being installed in Iowa. Of the 3.5GW of capacity being installed by the company in Iowa, 3GW have been for MidAmerican Electricity.

José Antonio Miranda, CEO of Onshore Americas at Siemens Gamesa Renewable Energy, said: “We are once again proud to have been awarded a project by MidAmerican Energy Company, strengthening our long-standing relationship with them.

“We have had great success with the SG 4.5-145 wind turbine, with over 1.4 GW sold in the U.S., Canada and Mexico, and are excited to continue growing that number.”