Barrage Longchamp is a Hydraulic construction located in Franquelin; Manicouagan, Quebec.

• Latitude: 49° 26' 28'' North   (decimal: 49.4411573)
• Longitude: 67° 40' 52'' West   (decimal: -67.6811156)
• Topography Feature Category: Hydraulic construction
• Geographical Feature: Barrage
• Canadian Province/Territory: Quebec
• Location: Franquelin; Manicouagan
• Atlas of Canada Locator Map: Barrage Longchamp
• GPS Coordinate Locator Map: Barrage Longchamp Lat/Long