Informal hearing to be held on new mine request

(The Frontier photo by Kayla Branch)   CPASA, other opponents argue that company’s plans may be illegal    By Tom Lokey Sentinel Co-Publisher The Oklahoma Department of Mines (ODM) will be having an informal hearing on Covia Solutions LLC, also known as Unimin, at 1 p.m. on Friday, Feb. 13, at the Ada Public Library.  […]