On August 29, 1999, at 1145 central daylight time (cdt), a Benson Sorrell SNS-7, N60SV, was substantially damaged when the airplane ground looped during a landing roll on runway 23 (6,498' x 150') at the Mt. Vernon Airport, Mt. Vernon, Illinois. The pilot and passenger were not injured. Visual meteorological conditions prevailed and no flight plan was filed. The personal flight was operating under the provisions of 14 CFR Part 91. The flight originated from Creve Couer, Missouri, at 1015 cdt. The pilot reported that during the landing, "Upon rollout a quartering crosswind from port side lifted tail to starboard continuing 360 degrees causing the starboard landing gear to fold under the fuselage." The pilot reported the local winds at the time of the accident were from 150 degrees at 15 knots gusting to 18 knots.