Recently, demand for electric power has been showing a steady increase.
Thus, our company promotes diversification of power sources with well balancing
which includes development of nuclear power plants as the main step and
the development of coal combustion and LNG power plants to secure electricity
supply in the long term. Pumped storage power stations are regarded as
power sources for the demand during daily peak or emergency time since
they can easily adjust to sudden change of loading and can quickly start
or stop the power generator. Under these circumstances, we plan to construct
Omarugawa pumped storage power station to reinforce electricity supply
after 2007. Omarugawa Power Station is the 3rd pure pumped storage power station and the largest hydroelectric power
station project of our company following Oohira Power Station in Kumamoto
Prefecture and Tenzan Power Station in Saga Prefecture.
According to our plan, the upper dam will be located at the upper stream
of the Ooseuchitani Stream to form the upper reservoir. Ooseuchitani Stream
is a tributary of Omaru River. The lower dam will be at the
middle part of Omaru River to form the lower reservoir. |
A 646m common effective head between these two reservoirs will be connected
by the watercourse of about 2.8km in length to generate electric power
at a maximum output of 1,200MW (300MW x 4 units) using 222m3/s water at the
underground powerhouse. |
