Columbiana County NGL Plant On Track for May Opening Chesapeake Energy | Columbiana County | Energy Companies | Energy Services | EnerVest | Industrywide Issues | M3 Midstream | NGLs | Ohio | Processing Plants December 17, 2012December 17, 2012 An update on the excellent progress being made with the construction of a new $400 million natural gas liquids collection and processing plant being built in Hanoverton (Columbiana County), Ohio by M3 Midstream: Please Login to view this content. (Not a member? Join Today!) Related