The Kruitmolen (English: Powder mill, Limburgish: Polfermeule) is a watermill located on the Plenkertstraat 82 in Valkenburg aan de Geul, Netherlands. Build in 1820 along the Geul river, the watermill functioned as powder mill until 1851 and temporarily became a paper mill between 1875 and 1884. Since 1887 it is part of a brewery where it currently still forms a part of the electrical supply system. The mill is a rijksmonument since January 24, 1984 and is part of the Top 100 Dutch heritage sites.