Already facing a lawsuit claiming decades of state mismanagement of the Oroville dam and a “culture of corruption” that fostered harassment, the California Department of Water Resources drew a new legal challenge from Sacramento County—one that accuses its employees of improper communications around the twin tunnels project.The latest DWR drama was triggered January 15, when attorneys for Sacramento and San Joaquin counties, and the city of Antioch, filed a motion demanding that the State Water Resources Control Board halt the phase-two public hearings for WaterFix, better known as “the twin tunnels” project.