A new spillway gate is hoisted over Blind Slough dam for installation at BC Hydro’s Stave Falls facility near Mission. BC Hydro installed the fourth and final gate on Tuesday, Oct. 30. Each gate is five metres wide and close to seven metres high and weighs more than 24 tonnes. The gate replacement is part of a larger BC Hydro spillway gates program that will improve the reliability of spillway gates throughout BC Hydro’s system. The gates allow BC Hydro to reliably release excess water from the reservoir in a safe, controlled manner.