Mattmarksee is a reservoir in the Saas Valley of the Canton of Valais, Switzerland. The Mattmark dam was built from 1960-1965. The lake's surface area is 1.76 km².
Mattmarksee is a reservoir in the Saas Valley of the Canton of Valais, Switzerland. The Mattmark dam was built from 1960-1965. The lake's surface area is 1.76 km².
Dams 
