On April 28, 2006, about 0945 central daylight time, a Cessna 182T, N1129P, piloted by a student pilot on a solo instructional flight, was substantially damaged during a runway excursion while landing on runway 21 (7,200 feet by 150 feet, concrete) at Dane County Regional Airport-Truax Field (MSN), Madison, Wisconsin. The flight was being conducted under 14 CFR Part 91 without a flight plan. Visual meteorological conditions prevailed. The student pilot was not injured. The flight departed Lake in the Hills Airport (3CK), Lake in the Hills, Illinois, about 0900. The student pilot reported that after establishing contact with MSN approach control, she was cleared for a straight-in approach to runway 21. She stated "upon landing the plane veered left into the grass." She noted that the airplane went down a hill and encountered a "gully." The nose gear collapsed during the accident sequence. She stated that there were no mechanical malfunctions or failures associated with the airplane prior to the accident. Winds recorded by the MSN Automated Surface Observing System at 0953 were from 140 degrees at 8 knots.