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Dam data table
 
Dam No.:550
 
Koyama Dam [Ibaraki Pref.]


Dam Photo

(Photo by: Dai)
020841
041661 Ike-chan
075935 Dai
041666 Ike-chan
Location (Latitude, Longitude) N 36°471' 47'',E 140°38' 39''   [Japanese Dam Finder]
Purpose/Dam type FNWI/G
Height/Crest length/Dam volume 65m/462m/531 thousand m3
Catchment area/Water surface area 79.7km2/28ha
Reservoir capacity 16600 thousand m3
FY project started/completed 1977/2005


Notes:
1. Dam purposes are abbreviated as follows:
A: Agricultural irrigation   F: Flood control   I: Water supply for industry   N: Non-specified, river flow maintenance
P: Hydropower   R: Recreation   S: Snow melting &removing   W: Water supply

2. Dam types are abbreviated as follows:
A: Arch   B: Buttress   CSG: Trapezoidal CSG   E: Earthfill   FA: Asphalt face fill   FC: Asphalt core fill   G: Gravity
GF: Gravity concrete & fill dam (compound)   HG: Hollow gravity   MA: Multi-arch   R: Rockfill

3. The fiscal year (FY) in Japan is from April 1 to March 31 of the following year.

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