Barrage de l'Achigan is a Hydraulic construction located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 14' 9'' North   (decimal: 46.2358917)
• Longitude: 77° 7' 16'' West   (decimal: -77.1211168)
• Topography Feature Category: Hydraulic construction
• Geographical Feature: Barrage
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Barrage de l'Achigan
• GPS Coordinate Locator Map: Barrage de l'Achigan Lat/Long