Dam data table 　 Dam No.：594 　 Sannakawa Dam ［Gunma Pref.］ Dam Photo （Photo by: Dam master） 047528 Dam master 062178 Dai 041845 takane 041844 takane Location (Latitude, Longitude) N 36°121' 55''，E 139°2' 40''   [Japanese Dam Finder] Purpose／Dam type A／E Height／Crest length／Dam volume 19.7m／218.2m／230 thousand m3 Catchment area／Water surface area 67.3km2／13ha Reservoir capacity 1426 thousand m3 FY project started／completed 1929／1933 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. Please send your comments Copyright 2012 JAPAN DAM FOUNDATION. All rights reserved.