Tam Doduc knows what she’s doing. Doduc, a longtime water board member, has the unenviable job of serving as the hearing officer — that is, as a sort of judge — in the tunnels case. She hears objections, occasionally poses her own questions, and keeps dozens of water attorneys in line which is no small feat. Doduc is a civil engineer by trade, not an attorney, but this is clearly not her first time presiding over a formal hearing.