Complex sentence: In the early days, Wasserburg was an important hub in the salt trade, where the salt, mined in Berchtesgaden and shipped from Bad Reichenhall by cart, was then transported by ships travelling on the Inn River.
Split into simpler sentences: In the early days, Wasserburg was an important hub in the salt trade. On its shore the salt, mined in Berchtesgaden or produced in the Saline (saltern) at Bad Reichenhall and shipped from there by cart, could be loaded on ships travelling on the Inn River.