Every spring and fall, PortsToronto scoops thousands of tons of mud and silt out of the Keating Channel, the manmade waterway at the mouth of the Don River.
The dredging reduces the risk of dangerous flooding, but it also serves another purpose: once the muck is extracted, workers haul it across the inner harbour and carefully deposit it in specially reserved “cells” on the north side of the Leslie Street Spit, where it will eventually make new land, enlarging the existing wildlife preserve.

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