Tvis Å runs into Reservatsøen, which is the eastern part of the Vandkraftsøen. In 2008, Holstebro municipality completed a project that has moved the run of the stream, so the smolt will not go through Klosterarmen and thus past many mouths of pikes.

At the same time, with the help af our association, several spawning areas were established, which in winter 2008/2009 were in use. Subsequently, 800 m3 of gravel has been used to make a lot of spawning places over a 15 km river run. It will be exciting to follow how great a potential this little gem of a stream can get in the future.