Standing 126 feet from its base to the top (that's equal to a 13-storey condo), it was the largest dam in Canada when completed in 1911 (also serving as the sole power source for Victoria), and currently generates some 30% of Vancouver Island's electricity.
This link has a lot of information on the dam and explores the history of Jordon River, which, according to the article, was at one point quite a bustling town complete with an orchestra!
About two months ago I was at a bonfire about a kilometer off HWY 14 not too far from Jordon River. Near our bonfire location a structure that we assumed to be a substation loomed below us (we could even hear a slight hum emanating from it). Nobody at the bonfire knew what the building was used for and it was too muddy (not to mention too dark) to trudge through the forest to get to it, but having read the above-linked article on the dam I figure that the two could be related.
From the BC Archives




















