Zeya Dam

BW

The Zeya Dam ( Russian Зейская ГЭС / Seiskaja GES) dammed the river Zeya, a tributary of the Amur, Zeya to the reservoir. It is located in the Amur Oblast of the Russian Far East Federal District.

The entire project was planned to produce energy from water power and for the purpose of flood protection before 1964.

Reservoir

The Zeya Reservoir is located south of the Stanowoigebirges, east of Tukuringragebirges and northwest of the Dschagdygebirges. It is measured at the storage space of 68.42 billion cubic meters, the eleventh largest in the world. Its area is reaching the storage target ( for the first time in August 1980) 2419 km ², the total shoreline length 2100 km.

Dam

The Zeya Dam, which was built near the town of Zeya, has an unusual design. There is a buttress dam with cavities which are designed to ensure a constant temperature in the wall to effect a favorable pressure distribution. In addition, for the first time a concrete was used by his coarse aggregate has a greater resistance to cavitation. Only half of the concrete was used, which would have been necessary in a massive, monolithic dam. The construction costs could be reduced to 60 % of the initially estimated value.

The dam, whose completion is dated next to the year 1978, to 1975 and 1980, has a construction volume of more than 2 million m³ at 115.5 m height.

The dam or reservoir serving under other flood protection in the Zeya and Amur. Previously, hundreds of hectares of fertile land were often flooded and also threatens major cities like Seja and Blagoveshchensk. Today the Seja is a tamed river.

The spillway drain has the following capacities that depend on the water level:

• With a top water level of 315 m: 2900 m³ / s
• At 317.5 m: 4800 m³ / s
• At 321.1 m: 8400 m³ / s
• At 322.1 m: 9500 m³ / s

Hydroelectric power station

The Seja power plant is the first large hydroelectric power plant in southeastern Siberia, where the climate results in large differences in temperature to 80 ° C. It has six machine units with a total installed capacity of 1330 megawatts ( MW 215 each originally, together 1290 MW; rebuilt 1987-1990 ). The turbines have a specificity for their blades are adjustable and attached to the axle is not horizontal but at an angle of 45 °. Thus, the turbine can be operated at a low water level in the reservoir effectively. The hydropower plant has a building totaling 106,700 cubic meters.

The first turbine adopted on 27 November 1975 operation, the last in June 1980. Nowadays, the power plant is operated by RusHydro.