Tailings.info Cleveland Potash Backfill System
Cleveland Potash - Boulby Mine, Cleveland, UK. Figure 1: Cleveland Potash - Boulby Mine, Loftus, UK (Courtesy of CPL Ltd.) Introduction. Cleveland Potash Limited (CPL) mines 3.0 mtpa of ore at the Boulby underground mine in north-eastern England, producing 1.0 mtpa saleable potash by conventional flotation processes.