Le Grand Fossé is a Hydraulic construction located in L'Isle-aux-Coudres; Charlevoix, Quebec.

• Latitude: 47° 23' 21'' North   (decimal: 47.3891891)
• Longitude: 70° 21' 52'' West   (decimal: -70.3645182)
• Topography Feature Category: Hydraulic construction
• Geographical Feature: Fossé
• Canadian Province/Territory: Quebec
• Location: L'Isle-aux-Coudres; Charlevoix
• Atlas of Canada Locator Map: Le Grand Fossé
• GPS Coordinate Locator Map: Le Grand Fossé Lat/Long