WHILE ON FINAL APPROACH FOR LANDING ON A DIRT ROAD LOCATED ON A PRIVATE RANCH, THE AIRCRAFT IMPACTED UTILITY TRANSMISSION LINES SUSPENDED 30 FEET ABOVE AND PERPENDICULAR TO THE ROAD. THE AIRCRAFT SEVERED THREE LINES AND TRAVELLED 140 FEET FURTHER BEFORE IMPACTING ON THE ROAD IN A FLAT ATTITUDE. ALL THREE LANDING GEAR COLLAPSED AND THE AIRCRAFT SLID OFF THE ROAD STRIKING A BARBED WIRE FENCE. THE AIRCRAFT CAME TO REST 240 FEET BEYOND THE TRANSMISSION LINES. THE PILOT WAS LOOKING AT THE AIRSPEED INDICATOR INSTRUMENT WHEN THE COLLISION OCCURRED.