Novosibirsk Reservoir or
Novosibirskoye Reservoir , informally called the
Ob Sea , is the largest
artificial lake in
Novosibirsk Oblast and
Altai Krai,
Russian Federation. It was created by a 33 m high concrete
dam on the
Ob River near
Novosibirsk. The dam, built in 1956, is for generating
hydroelectric power. The reservoir is 200 km long and up to 17 km wide. Its area is 1,070 km
2 and its volume is 8.8 km
3. Its average depth is 8.3 m. The design hydroelectric power output is 460 MW, the average energy production is 1,687 GWh per year.