I had to smile because I've never known the Amstel River (Muntplein, Amsterdam 1012) had an address. The Amstel is a river that originally started by a confluence of De Drecht, De Kromme Mijdrecht, Bullewijk and Waver. Later, the Amstel was channelled and flows at Amsterdam in Het IJ. All canals and channels are fed by the Amstel in Amsterdam. The monitoring of all the water in The Netherlands happening since long time by the water boards which also monitor all dykes and water management so that we Dutch keep our feet dry.