Provincial police are investigating a collision between a WaveRunner and boat on Lake Couchiching on Saturday that seriously injured one person. Orillia OPP say the collision occurred at 7:40 p.m. near Menoke Beach Road. As a result, one person suffered possible life-threatening injuries and was brought to a Toronto-area hospital for treatment. Anyone in the area of Lake Couchiching or near Chiefs Island at the time of the incident or any potent…