The site is shut down today as the investigation continues.
Emergency officials at the site said both men were pronounced dead at the scene.
Law enforcement and Bradley County Emergency Medical Service paramedics responded just before 10:30 p.m. along with Bradley County Fire Rescue.
Early Bradley County 911 reports noted scaffolding had fallen and it was unclear how many people were injured.
Initial reports indicated the two men had fallen approximately 70 feet and that at least five other people were injured; however Wacker officials early today reported no other workers were hurt.
Stan Clark of BCEMS said late Wednesday evening that five EMS units responded and an AirEvac helicopter was placed on standby as paramedics and fire first responders assessed the situation.
Wacker Director of Corporate Communications William J. Toth confirmed this morning that two contractor workers died at the project site.
According to a media statement this morning, Toth said, “On the evening of Oct. 10, 2012, two construction workers lost their lives in a work-related accident while performing their job responsibilities at the Wacker Polysilicon North America plant in Charleston, Tennessee. They were pronounced dead at the scene by Bradley County EMS.
“Wacker and its employees are deeply saddened by this tragic loss of life,” said Dr. Konrad Bachhuber, Wacker Polysilicon vice president and site manager. “We wish to extend our heartfelt sympathy and condolences to the families of the deceased construction workers.”
In the Wacker statement, Toth pointed out, “A thorough investigation about the accident in cooperation with local authorities is under way.”
Toth said during a normal work day, 1,200 construction workers are involved in the construction process.
Construction on the site of the former Wright family farm in Charleston began in April 2011. It is located at 553 McBryant Road.
Wacker Chemie AG, a Munich, Germany-based company, will produce hyperpure polysilicon which is used in the solar energy industry. The company will invest more than $1.5 billion in construction at the site.