Lower spot - Krasnoyarsk hydroelectric power station dam.

In the reservoir flow some pretty major rivers, including the right bank - Tuba, Sisim, Syda, on the left - Biryusa.

At the confluence of the rivers flow directly into the previously Yenisei, creating reservoirs formed bays.

The most significant of them - Tubin, Syda, Karasug, Sisim, Durbin, Biryusinsk.

It had been populated by Khakassky tribes - Abakan fort (near modern Krasnoturansk).