“…The company's preferred option was a combination of passive alternatives which would reduce flow emanating from the stockpiles, and use wetland treatment to remove metals from the resulting drainage. In 1988, four overland flow test cells were built to investigate methods to optimize metal removal and to provide design data 800 for the ultimate implementation of wetland treatment at this facility (Eger and Lapakko, 1989;Eger et al,1991Eger et al, , 1993Eger et al, , 1994. Based on the results of this study, two full-scale wetland treatment systems were built in March of 1992 (Eger et al, 1996).…”