The Perlenbach, in
East Belgium called the
Schwalmbach, is formed from several headstreams and tributaries, most of which rise on Belgian soil in the
Elsenborn Training Area near the twin-villages of Rocherath-Krinkelt, in the municipality of
Büllingen,
Liège Province. There, where it is still called the Schwalmbach, it gathers water from the Rinnsaler Schwalmbach, Krockesbach, Kranbach, Drosbach, Lienbach, Büllingerbach (or Fuhrstbach), the Wolfsbach and the Heisterbach. From its confluence with the Heisterbach, it is known as the Perlenbach. It flows northwards, is impounded by the Perlenbach Dam and discharges into the
Rur in Germany, west of the town of
Monschau in
North Rhine-Westphalia. Its waters are mainly used to supply drinking water by means of the reservoir and its associated waterworks. == Perlenbach Dam ==