| Zainsk Reservoir | |
|---|---|
| Zay Reservoir | |
  Zainsk Reservoir | |
| Location | Tatarstan |
| Coordinates | 55°16′44″N 52°02′23″E / 55.27889°N 52.03972°E / 55.27889; 52.03972 |
| Type | reservoir |
| Basin countries | Russia |
| Max. length | 12 km (7.5 mi) |
| Max. width | 1.7 km (1.1 mi) |
| Surface area | 20.5 km (7.9 sq mi) |
| Average depth | 3.1 m (10 ft) |
| Water volume | 52.3×10 |
| Settlements | Zainsk |
Zainsk Reservoir or Zay Reservoir (Russian: Заинское водохранилище, Tatar: Зәй сусаклагычы) is a reservoir of the Zay River near Zainsk, Tatarstan, Russian Federation. It was filled in 1963 to be a cooling pond for Zainsk TTP. It has surface area 20.5 km², a length 12 km, mean width 1.7 km, mean depth 3.1 m and a volume 63 million cubic meters.
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