 Its water flow is held roughly constant by a weir and it runs above ground as far as the "Münzgasse".Behind the former state central bank it disappears into a tunnel and surfaces again opposite the Graser School just before reuniting with the northern branch.In the late 1990s a section of the channel in "Opernstraße" was exposed and swept up as part of the rebuilding at the southern end of "Luitpoldplatz".