LEWISTON — CES Inc., a provider of civil, environmental, structural and traffic engineering, was one of six Maine firms that recently received recognition by the American Council of Engineering Companies of Maine.

The 2016 Engineering Excellence Awards ceremony at the University of Southern Maine was a prelude to the national ACEC competition for the most innovative engineering projects in the country.

CES Inc. at 640 Main St. received one of three Honor Awards for Engineering Excellence for its work on the Presque Isle Solid Waste Landfill closure.