Authorities continue to investigate a helicopter hitting some power lines about 4 miles northeast of Green Isle Friday evening. 27-year-old Daniel Lee of Belle Plaine was reportedly able to maintain control of the crop-dusting helicopter after it collided with the utility wires at just after 7:30pm and was able to land safely in a nearby field. Lee was not injured, and the helicopter took moderate damage. Excel Energy responded to fix the damaged lines. The incident is under investigation by the Sibley County Sheriff’s Office, and is being reviewed by the Federal Aviation Administration.