Fig.25 - At Caumasee (Lag la Cauma) in Flims. The flow system has been severely attacked by building the Flims Bypass Tunnel when engineers decided to divert underground water flow out of the tunnel instead of sealing it into the rock. Since 2011 additional water is being fed near the tunnel into the river to compensate the water loss in the underground system. Nikon Z6, Nikon Z 24-70mm f/4S lens (October, 2021).