On June 14, 2000, at 1500 mountain daylight time, a Piper PA-12, N3846M, sustained substantial damage when it departed the side of the runway during landing roll at Dutch John, Utah. The private pilot and sole occupant was not injured. Visual meteorological conditions prevailed for this personal flight which originated at Driggs, Idaho, earlier in the day. The flight was operating under Title 14 CFR Part 91 and no flight plan was filed. The pilot reported that he was attempting to land on runway 29 at Dutch John and encountered wind gusts that varied in direction from 15 to 20 degrees either side of the runway. He estimated the gusts to be in excess of 30 knots. In his report on the accident, the pilot said he lost control of the aircraft during landing roll due to the gusts and the aircraft departed the right side of the runway and hit a tree. Damage was to the right wing and right wing strut.