View Comments In an open field in Highland County, typically used for soybean and corn, Cincinnati leaders and partners broke ground on what officials are calling the largest municipal solar array in the country. The sun was out while around 40 people gathered near Sardinia, Ohio to break ground and celebrate the new solar panels. Some sat inside a tent. Others stood out in the sun, listening to officials and locals share how this project came to be in Highland County. Yasmin Chilton, a spokeswoman for Mayor John Cranley's office, said the New Market Solar project will contain more than 310,000 solar panels – equivalent to the size of 750 football fields.