Sufnersee is a reservoir between Splügen and Sufers on the Hinterrhein river in the Grisons, Switzerland. The dam Sufers was built 1962. The reservoir has a volume of 17.5 million m³ and its surface area is 0.90 km². ... Found on http://en.wikipedia.org/wiki/Sufnersee
1) Lake of Graubünden 
Sufnersee is a reservoir between Splügen and Sufers on the Hinterrhein river in the Grisons, Switzerland. The dam Sufers was built 1962. The reservoir has a volume of 17.5 million m³ and its surface area is 0.90 km². ...