La Grande-Dame is a Hydraulic construction located in Magog; Memphrémagog, Quebec.

• Latitude: 45° 16' 21'' North   (decimal: 45.2725422)
• Longitude: 72° 6' 20'' West   (decimal: -72.1056554)
• Topography Feature Category: Hydraulic construction
• Geographical Feature: Barrage
• Canadian Province/Territory: Quebec
• Location: Magog; Memphrémagog
• Atlas of Canada Locator Map: La Grande-Dame
• GPS Coordinate Locator Map: La Grande-Dame Lat/Long