Wikipedia
Mamonovka
The Mamonovka or Banovka is a river between Russia ( Kaliningrad Oblast) and Poland ( Warmian-Masurian Voivodship). It flows into the Vistula Lagoon. It is 51 km long and has a 311 km drainage basin.
The Ignatievka River and the Vitushka River are tributaries of the Mamonovka.