No fish there! Many years ago they manipulated the way of the river, "cleaned" it up etc. and the fish was gone! In the past we had in every small river here Trout, very rare grayling fish because the quality of the water. Than came the human and thought ´let us manipulate the nature a bit´ and that was it...
This is why they let now fallen trees in the river.
Best is, in the small village my best Buddy lives, there is a small river too which was manipulated. They spent 5 Million to fix it but without any success so far