Nevada Gold Mines donated $500,000 to a PAC affiliated with Gov. Joe Lombardo in March, making the mining conglomerate one of the Republican governor’s top donors in his bid for re-election. … The latest cash infusion has raised more questions in comments on news articles and other online spaces than usual because it followed the firing of Adam Sullivan, the top official responsible for regulating water rights in the state after the mining industry complained about him to the governor’s office. … The mining industry’s complaints to Lombardo’s office related to a draft proposal by the former state water engineer designed as a “starting point” for public input to reduce groundwater pumping in the Humboldt River Basin, site of many Nevada Gold Mines properties.