Regulation No. 162 on the conservatoin of Sønstebybekken natural reserve, Modum kommune, Buskerud.

The purpose of this Regulation is to preserve a forest area in the Oslo area (Sønstebybek natural reserve in Modum kommune, Buskerud)with a variety of habitats, ecosystems and species. The area consists of old forest, some dead wood and calcareous vegetation in its lower part and is of special interest as a stream gorge with rare and endangered species.