The pilot stated that during landing on runway 32 (4,007 feet by 75 feet, concrete), he realized the airplane was too high and too fast. Upon touchdown, the airplane was going "too fast," and the pilot inadvertently applied left rudder thinking that he was applying additional braking. The airplane departed the runway surface towards the south and impacted a drainage ditch that was parallel to the runway. The airplane sustained substantial damage, which included left wing and left wing spar damage. No mechanical anomalies were found with the airplane.