Discharge and aeration capacity of the diversion conduits, the pressures in the ducts and vibration and downpull forces on the gates were analyzed. Model studies were carried out to study the hydraulic behavior of the gates used for closing operation. The model was built to a scale of 1:20 and was based on Froude's similarity criterion. The tests consisted of picking up the vibratory vertical response to impulsive stimulations, using accelerometers. Results indicated that on the current model, no interference was caused by the uncertainties related to the modelled areas up- and downstream.