(CHANDLER TOWNSHIP) -- DTE Energy Co. says it has halted power production and construction at a wind park in Michigan's Thumb while it investigates why a blade broke on one turbine. DTE spokesman Scott Simons says that "there's no timetable" on resuming operations at Echo Wind Park. He says the company isn't going to put "anyone or anything at risk" until it discovers the cause of last week's accident. The turbine that broke is in Huron County's Chandler Township. Sixty of the 70 planned turbines are in place and were producing electricity until the accident. Simons says the company is halting construction of the remaining 10 turbines as well as operations of the 60 that are complete.