On October 9, 1999, about 0700 hours mountain standard time, a Stinson 108-3, N871C, sustained substantial damage when it collided with ground obstacles after veering off the left side of the runway while landing at a private dirt strip near Yuma, Arizona. The private pilot/owner was operating the airplane under the provisions of 14 CFR Part 91. The pilot sustained minor injuries and the passenger was not injured. The personal flight originated from a private landing strip in Somerton, Arizona, about 0645. Visual meteorological conditions prevailed and no flight plan was filed. The pilot stated he was on landing rollout when a gust of wind pushed the airplane to the left side of the runway. The pilot tried to counter with rudder control, but was unable to prevent the airplane from departing the runway. The airplane hit a 2-foot-high berm and encountered a ditch, collapsing the right main landing gear and buckling the airframe in the gear attachment area.