The more modern coal hopper would appear around 1850; it featured four axles (which rode on an early truck system), was 11 feet 6 inches, 5 feet 3 inches wide, 40 inches deep, and carried a wheelbase of 9 feet 6 inches. It weighed roughly 4,500 pounds and could haul 4 tons. Over the years, the hopper becamePerfectr and stronger (moving from wood