At approximately 1205 Pacific time the airplane departed the side of the runway and impacted a VASI light standard and a nearby ditch. The Private pilot and sole occupant was not injured but the aircraft sustained substantial damage. The flight was being operated in visual conditions. According to the pilot, about 100 feet into the landing roll, the aircraft veered sharply to the right. When he tried to correct back to the left, the aircraft departed the left side of the runway. After departing the runway, the aircraft impacted the VASI standard, and then slid into a ditch. The impact with the VASI and the contact with the ditch resulted in substantial damage to the airframe.