Alberta's iconic river has been dammed and plumbed, made to spin hydro-electric turbines, and used to cleanse Calgary. Artificial lakes in the mountains rearrange its flow; downstream weirs and ditches divert it to irrigate the parched prairie. Far from being wild, the Bow is now very much a human product: its fish are as manufactured as its altered flow, changed water quality, and newly stabilized and forested banks. The River Returns brings the...