On May 10, 1999, at 1700 central daylight time, a Cessna 180J, N59DW, piloted by an airline transport pilot, sustained substantial damage during a taxi operation at the Necedah Airport, Necedah, Wisconsin. The public use flight was following the provisions of 14 CFR Part 91 and was not operating on a flight plan. The aircraft was registered to the State of Wisconsin and operated by the Wisconsin Department of Natural Resources. Visual meteorological conditions prevailed at the time of the accident. The pilot reported minor injuries. The flight was originating at the time of the accident. In a written statement, the pilot stated that he was back taxiing for departure on Runway 18 (2700 feet by 60 feet, dry/asphalt) at the Necedah Airport, Necedah, Wisconsin airport. The pilot stated that, as he taxied near the area adjacent to the hangers on the east side of the runway, the aircraft turned abruptly to the right. The pilot stated that he applied full left rudder and the aircraft nosed over and came to rest in an inverted attitude. A weather report, for a reporting station located 25 miles and 28 degrees magnetic from the accident site, reported winds from 100 degrees magnetic at 16 knots gusting to 23 knots.