MidAmerican Energy has agreed to supply about 407MW of wind-sourced energy for Google's Council Bluffs, Iowa data center in the US.

MidAmerican will supply wind power from various wind projects that are part of its Wind VIII program.

Under the program, MidAmerican plans to bring 1,050MW of new Iowa wind power online by the end of 2015.

The agreement will power the first phase of Google’s facilities in Council Bluffs and will allow additional phases to be supplied with wind-sourced energy as the company expands in Iowa.

Google said the agreement represents its seventh and largest renewable energy purchase to date, bringing the total amount of renewable energy it has contracted to more than 1,000MW.

Google global infrastructure director Gary Demasi said the company pursues several approaches to power its operations with renewable energy.

"One great way to do this is by working with our utility partners like MidAmerican Energy, and we hope this agreement will inspire all of our utilities to work with us in finding ways to increase the supply of clean power," Demasi said.