A construction worker was recently killed while working on MidAmerican Energy Co.'s North English Wind Project (Wind XI) in Poweshiek County, Iowa.

An employee for Blattner Energy, Inc., a Minnesota-headquartered engineering, procurement and construction firm, was fatally injured while operating a crane on the North English Wind Project's construction site, a MidAmerican spokesperson said in an email. Specific details, including the cause of the accident, are currently unknown and under investigation.

"Our thoughts and prayers are with this man's family, friends and co-workers," the spokesperson added.

Blattner Energy's general counsel did not immediately return a call for comment, as of publication.

The 340-MW North English Wind Project is part of MidAmerican's $3.6 billion Wind XI, a 2,000-MW multiunit wind project, according to S&P Global Market Intelligence data. Construction at North English began in October 2017 and is expected to wrap up by the end of 2018.

MidAmerican is a subsidiary of Berkshire Hathaway Energy.