[Perfection]

Koyna river originates from Mahabaleshwar, which gets an annual record rainfall of 6000 mm plus. The dam at Koynanagar is 807 m long and 103 m high. It has 98.78 TMC storage capacity, 600 MW underground power station at Pophali and the used water goes to Kolkewadi reservoir. From there it is fed to a 320 MW power station. The total power generated from different phase power stations ia around 1920 MW.

The construction work of Phase IV is in progress. A 130 m deep pit is carved from rock and it connects two underground (under lake) tunnels. The dam has a depth of 80 m and the tunnels are below the lake bottom. When the work is completed the tunnels will be opened by using explosives and water will be fed to turbines in the power plant - an engineering marvel at Koyna.