The solo private pilot of the Title 14 CFR Part 91 flight was taking off to practice touch and go landings in a tailwheel equipped airplane. The pilot reported the wind was from the left at 5 knots, and as he began the takeoff roll, the airplane veered to the left, and he was unable to maintain directional control. The airplane subsequently collided with a snow berm on the left side of the runway and nosed over. He said there were no known mechanical anomalies with the airplane prior to the accident. The airplane received damage to the right wing, vertical stabilizer, and propeller.