Historically, the Bulak river flowed into Kazanka until it was separated by a dam in 1957.

The maximum river discharge is 299 cubic metres per second (10,600 cu ft/s), and the minimal mineralization is 400–1000 mg/L.

During the construction of the Samara Reservoir, a lower part of the Kazanka valley was flooded.

In 2008, a project was proposed to fill in a cove in the wide section of the estuary for a business district.

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