Stausee Mapragg (Mapragg reservoir) is located at Pfäfers in the Canton of St. Gallen, Switzerland. Its surface area is . The reservoir and Gigerwaldsee are operated by Kraftwerke Sarganserwald (NOK group) for pumped-storage hydroelectricity.
See also List of mountain lakes of Switzerland
External links Swissdams: Mapgragg
Kraftwerke Sarganserland company information Kraftwerke Sarganserland visitor information Kraftwerke Sarganserland scheme