And another update: In the summer of 2023, it was possible to dam up water again. Swimming is possible - although no longer with the previous water depth and size …
The Mesches dam, built by the Italians in 1917, is the largest dam in the Alpes-Maritimes. It is fed by the Inferno and Casterino valleys at their confluence.
Lago degli Alberghi is nestled in the basin in front of Mount Chiamossero, reachable from Palanfrè. Here you can stop for a regenerating break enjoying the view.