Gustav Vasa
Disputes over salmon fishing in Älvkarleby went on for centuries after King Knut Eriksson. Magnus Ladulås, Magnus Eriksson, Sten Sture the Elder, and Johan II were all involved in the disputes, where farmers from Hedesunda, Österfärnebo, and Dalarna complained that the salmon could not get past the permanent fishing buildings in Älvkarleby and up to their fishing waters.
When Gustav Vasa became king, he promised to investigate the conditions in Älvkarleby. In 1528 he, therefore, visited Älvkarleby and decided that the crown (the state) would get 2/3 of the catch and the älvkarleby farmers 1/3. The Dalkarlars were not at all satisfied with what the king had decided and demanded that Kungsådran be opened so that the salmon could walk freely past Älvkarlebyfallen. Gustav Vasa dismissed Dalkarlarna's complaint.
Disputes over salmon fishing in Älvkarleby continued during the 17th and 18th centuries. For example, the common people in Dalarna protested by coming to Älvkarleby around 1700 and trying to dig a new river channel through Laxön so that the fish could walk past the fishing spots in Kungsådran. The work was stopped when it was obstructed by solid rock. See the information board about Gustav Vasa on Laxön.