Table 1: Details of the projects dams

* The dam is composed of soil materials making an impervious core and rocks/gravel to support water pressure
** This is a dam that supports water pressure by the weight of concrete

Upper dam Lower dam
Name Minamiaiki dam Ueno dam
Type Core wall rockfill dam* Concrete gravity dam**
Height 136m 120m
Volume 7.3Mm3 720,000m3
Total storage capacity 19.17Mm3 18.4Mm3
High water level asl 1527m 843.4m