 However, channel capacity was always limited by its shallow depth and the associated danger of shoals.In 1885, first steam-egine boats appeared, plying between Warsaw, Toruń, Bydgoszcz, Gdańsk and Elbląg.Wood rafted through the canal, which vast majority was pine, originated mostly from the Congress Poland (75%), but also from Galicia (12%), Russian Empire (5%) and Tuchola Forest (6%).