Pasłęka  The Pasłęka (Ger. "Passarge") is a long river in Poland that debouches into the Baltic Sea on the Vistula Lagoon near Braniewo. It flows through the lake areas of Olsztyn and Mrągowo, and through Gdańsk Coastal Area. The reported length of the river varies, depending on sources, from . The river springs nearby Olsztynek, between Stawiguda and Gryźliny, at AMSL; though some sources place it in the Pasłęk reservoir, which lies at AMSL. The river flows through the town of Braniewo (until 1945 the German town of "Braunsberg"). The drainage area of Pasłęka spreads over . Pasłęka's average mouth discharge equals . The whole length of the river is covered by River Pasłęka Beaver Refugium nature reserve. Pasłęka is one of Warmia's two main rivers, accompanied by Łyna. Pasłęka divides two historical lands: Warmia and Upper Prussia, consequently for centuries bordering the state of Prussia and Polish Warmia. In the 2007 water quality survey conducted on Pasłęka 2 kilometers (1.2 mi) from its mouth, its water was classified as the 4th class." The name 'Pasłęka' was officially introduced in 1949, replacing the former German name "Passarge". Pasłęka is sailable between its mouth in Nowa Pasłęka and the hydro plant in Braniewo. Several hydro plants are built on the river:   Pasłęka crosses the following lakes: Wymój, Sarąg, Łęguty, Isąg.