All the generators are located in underground powerhouses excavated deep inside the mountains of the Western Ghats.

Due to the project's electricity generating potential the Koyna River is considered as the life line of Maharashtra.

After the First World War, a hydro-electric project on the Koyna river was investigated by the Tata Group.

The discharged water from these stages is collected and stored in Kolkewadi Dam situated near village of Alore.

The water is drawn from the penstocks of Kolkewadi Dam to an underground power station in the 3rd stage and then discharged to the Arabian Sea.

Initially a weir was proposed to divert the water coming out of tail race tunnel of Stage I and II.

This water is drawn through penstocks and electricity is generated by four Francis turbine units with a capacity of 80 MW each.

The tail race water from these stages then flows through a channel and joins the Arabian Sea near Chiplun.

A nonconventional intake system was created by piercing the lake from the bottom by blasting the rock plug using dynamite.

Hence a wide biodiversity of plants and animals is observed in the evergreen forest surrounding the reservoir area.

Koyna Wildlife Sanctuary has dense forests with three major sections, Vasota, Maharkhor and Indavli Met, and the sanctuary is endowed with natural protective boundaries – Shivasagar Lake on one side, and the slopes of the Western Ghats on both the sides.

The sanctuary has a diverse variety of fauna including tigers and panthers; gaurs and sambars; barking and mouse deer; pythons and cobras; common langurs and Indian giant squirrels.

Many species of birds are found in the sanctuary including brown capped woodpecker; Asian fairy bluebird; and crested goshawk.

Another attraction of the sanctuary is Vasota Fort which lies deep in the forest and is located at a height of 1,120 m (3,675 ft) above sea level.

To commemorate this event a tableau was unveiled at his gracious hands on the right flank hillock of Koyna Dam.

There is an auditorium named 'Yashogatha' (meaning: story of success) which relives a small element of the tremendous efforts taken by the engineers and workers associated with project.

Due to the large rainfall in the hilly region surrounding the reservoir, some beautiful falls are generated in the monsoon season.