The operating hours of the Boguchanskaya HPP have been changed to prepare for the flood.

The Yenisei Basin Water Administration (EnBVU), in accordance with the order of the Federal Agency for Water Resources (Rosvodresursy), has established an operating mode for the Boguchanskaya HPP (part of the RusHydro Group) until April 3 in the flow range of 2900-3300 cubic meters per second.

The decision was made taking into account the recommendations of the interdepartmental working group. The established flow rates are the maximum among all stations of the Angara-Yenisei cascade; the regime can be changed in accordance with the hydrological situation on Lake Baikal, the Angara and Yenisei rivers.

During February, the station operated in the range of 3100-3300 cubic meters per second, the average flow rate was 3217.6 cubic meters per second. This made it possible to begin pre-flood drainage of the reservoir in preparation for the spring flood. Since the beginning of February, its level has dropped from 207.57 to 207.26 m (above the level of the Baltic Sea), the free volume has increased by 0.7 cubic kilometers.

The flood in the Lower Angara region begins in the first ten days of May, by this time the planned overhaul of hydroelectric unit No. 4 and ongoing repair work on hydraulic units No. 2 and 8 will be completed at the Boguchanskaya HPP. During the period of the flood, all units of the station are in operation or in reserve, in accordance with the hydrological situation and the requirements of the Unified Bank of Water Resources.

Due to temperature changes in January and February 2026, the ice edge in the downstream of the Boguchanskaya HPP is unstable: at the end of February it was 43 km from the station site, and a week later it retreated 12 km downstream. Thaws in February and March have already led to an increase in inflow into the largest reservoirs on the Angara by 10-20%; during March, with rising temperatures, a further increase in inflow is possible. According to preliminary data, snow reserves in different areas on the banks of the Angara River are 15-40% higher than normal.

The regimes for filling and draining reservoirs, and the passage of floods to hydroelectric power stations are established by the Federal Agency for Water Resources (Rosvodresursy), taking into account the recommendations of the Interdepartmental Working Group, which includes representatives of the Ministry of Emergency Situations of Russia, the Ministry of Agriculture of the Russian Federation, the Federal Agency for Fisheries, Rosmorrechflot, JSC SO UES, executive authorities of the constituent entities of the Federation, etc.

Information about the hydrological situation of hydroelectric power stations that are part of RusHydro is presented in the form of daily updated infographics.