新加坡土地少，无高山，不能修建常规的地面抽水蓄能电站。可利用废弃的采石场作为上库，在不透水花岗岩地层中开挖下库和厂房来建地下抽水蓄能电站。其投资与相同规模的燃油电厂相同。考虑到新加坡地价昂贵，所以修建地下抽水蓄能电站用以调峰很有吸引力。 Singapore has less land and no high mountains, and can not build conventional ground-pumped storage power stations. The abandoned quarry can be used as the upper reservoir to excavate the underground reservoir and factory building in the impervious granite formation to build underground pumped storage power station. The investment is the same as a fuel plant of the same size. Taking into account the high cost of land in Singapore, it is very attractive to build an underground pumped storage power station for peak regulation.