East Ke mptvil le Ti n cl os ed mi ne si te w ith value in t he wa stes O perated by R io Algom Ltd as a c losed mine s ite s ince 1992 with wat er t reatment s y s tem to manag e ac id mine drai nage from s toc k pil es and tail ings Dur in g the ear ly y ear s of oper ati on tin re c overi es were less than 50 and ass oc iated metalli c mineral ization coppe r z inc indi um gall ium was not recov ered at all Th er efor e the s tack ed tai li ngs whi c h ar e the main s ource of ac id mine drai nage hav e very high c ontents of valuable metals that c an be recov ered ec onomic all y using new proces s technologies Av alons model i s to s us tainabl y ful ly rehabi li tate the s ite s tar tin g wi th pr oces s in g lo w gr ade s toc k pil es using ore s orti ng tec hnology then re proces s ing the tail ings and r ec ov eri ng diss olved metals from the ac id mine drai nage 23 A bo v e Cur r en t E as t K em ptv i l l e s i te B el ow A r ti s t r en de r i ng of s i te po s t c l os ure Tai li ngs Stoc k pil e Futur e Solar farm