From The Hindu, July 25, 1925: The new electric scheme

The total power that is now being generated at Sivasamudram is about 32,000 H.P., the whole of which has already been taken up. The demand for additional power likely to be required during the next three years including that for small industries, fans, and other domestic purposes works out to about 12,800 H.P. After a careful investigation of the various schemes for the generation of the additional power required, Government have sanctioned necessary estimates for a VIIth installation, providing for the generation of an additional 14,000 H.P. at Sivasamudram Generating Station at a total approximate cost of Rs. 45.5 lakhs.