Estimated to generate about 500,000 MWh of energy per year, enough to serve around 46,000 households in the US, the project is located in Benton County, US.
Construction of the project, which has been renamed Amazon Web Services Wind Farm (Fowler Ridge), is due to kick off in April 2015.
The wind farm is planned to be commissioned by late 2015 or early 2016.
Pattern Energy announced the addition of 120MW of owned interest in the project to its list of identified right of first offer (ROFO) projects from Pattern Development.
Pattern Energy president and CEO Mike Garland said: "Pattern Energy is providing wind power to America’s top corporations and looks forward to working with Amazon Web Services upon the acquisition of this exciting new project, which has been added to our growing ROFO list.
"In the past 18 months we have acquired four projects from Pattern Development with an aggregate owned capacity of 557 MW and have also added an additional five projects, including Amazon Web Services Wind Farm (Fowler Ridge), to the ROFO list with an aggregate capacity of 553 MW."
