Excavators dug out old sections to create open water areas with ongoing management done by hand, using scythes.
Last summer a pair of marsh harriers nested at the site.
Suzanne McIntyre, who manages the nature reserve, said: “With the nest hidden in the reeds it is very difficult to get a good visual, but from closely observing flights in and out of the nest and from the number of birds we identified later in the season, we are confident that we had chicks fledge from the site.”