Respective project dimensions
Power station Okutadami   Otori  
  Existing Expansion Existing Expansion
Maximum power discharge 249 138 220 207
Maximum 0utput        
MW) 360 200 95 87
Civil structures of        
expanded power stations        
Power station Okutadami Otori    
Type of dam (existing) Concrete gravity arch Semi arch    
Dam height (m) 157 83    
Dam volume (m3) 1636×103 160×103    
Type of tailrace Underground free-flowing tunnel