Iwaya Dam is a multi-purpose dam constructed on the Mase River, a tributary of the Hida River, and located approximately 140km upstream from the mouth of the Kiso River.
English
Iwaya Dam Operation Maintenance Office Web Page
General Information
River : The Maze River.,one of tributaries of the Kiso River.
Location : Kanayama-Town,Gero-city,Gifu Pref.,50km northeast of Gifu City
Purpose
Flood control：Reducing estimated flood discharge from 2,400 to 300m3/sec.
Irindustal water supply：Max.discharge 17.63m3/sec.
Municipal water supply:Max discharge 21.93m3/sec.
Irrigation：Max discharge 6.13m3/sec
Power generation：Owner,Chubu Electric Power Co.,Inc;Installed capacity,288,000kw (Turbine
discharge 335m3/sec.）
The Structure of IwayaDam
Iwaya dam is a rock-fill dam
The body is compoxd of stones and rocks
Statistical profile of the dam and reservoir
Height：127.5m
Lengh：336m
Volume of the dam：5,780,000m3
Catchment area (direct)：265km2
Catchment area (indirect)：770km2
Reservoir area：4.26km2
Gross storage capacity：173,500,000m3
Effective storage capacity：150,000,000m3
Above Links are only Japanese
│Past flood Info│Water Quality Info│Tender Notice│PhotoGallery│Exhibition hall│
Incorporated Administrative agency/Japan Water Agency
Iwaya Dam Operation&Maintenance Office
6-27 Unohara Kanayama-Town Gero-City Gifu Pref 509-1602 Japan
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