Ben Mossman, the man behind a controversial plan to reopen a shuttered gold mine in Grass Valley, has been found guilty of 13 environmental crimes but was exonerated on another 10 counts in connection with another mine project in British Columbia. The court ruling involves a failed gold mine on an island off the coast of British Columbia that turned into a toxic site due to mine waste leaks. Ben Mossman is due to be sentenced on Sept. 26 in Prince Rupert Laws Court … It’s unclear how the court findings and the late September sentencing will influence the Nevada County Board of Supervisors. The board is expected to hold hearings in October and make a decision on the plans of Mossman’s company, Rise Gold Co., to reopen the Idaho-Maryland mine, which has been closed for nearly 70 years.