The left panel of the plaque graphical illustrates the depths of the mines of the Kirkland Lake Region. Two of the most significant mine shafts in the region are compared to the CN Tower.
The Macassa number 3 shaft, 7225 feet (2202 metres) is the deepest single stage shaft in the camp. 1.37 miles straight down! Four CN towers standing on top of each other if placed at the bottom of the shaft would not reach the surface.
The Wright-Hargreaves number 4 shaft was the deepest multi-stage shaft in the camp. in three stages it took men, machinery and materials down and returned the men and the mined ore from a depth of 8222 feet (2506 metres).