Barrage John-Bull is a Hydraulic construction located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 30' 26'' North   (decimal: 46.5072806)
• Longitude: 76° 53' 25'' West   (decimal: -76.8902699)
• Topography Feature Category: Hydraulic construction
• Geographical Feature: Barrage
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Barrage John-Bull
• GPS Coordinate Locator Map: Barrage John-Bull Lat/Long