The development of a townsite was registered on April 19, 1914 along the future site of the Canadian Pacific Railway branch line between Leader, Saskatchewan and Empress, Alberta.

By the time World War I began the growth of the new community of Estuary swelled from a few hardy pioneers to a booming 800 citizens.

Throughout Estuary's short history there have been many mysterious fires, two of which were devastating to the town.

Because of Estuary's serious decline after the end of World War I it was believed that the fires were deliberately set in order to collect insurance.

Feeling betrayed by the railway company many residents picked up and left never to come back, taking everything with them including their homes and businesses.