Unfortunately we don't know of any licences for this water yet. The cantonal fishing office or the local fishing club can help.
Map
Photos:
(1) Jag9889, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons · (2) Jag9889, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons · (3) Jag9889, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons