Dam data table 　 Dam No.：990 　 Iwakura Dam ［Nagano Pref.］ Dam Photo （Photo by: Hi Ace） 028200 Hi Ace 053272 Dam master 028199 Hi Ace 053263 Dam master Location (Latitude, Longitude) N 35°171' 02''，E 137°42' 31''   [Japanese Dam Finder] Purpose／Dam type P／G Height／Crest length／Dam volume 25m／100.6m／19 thousand m3 Catchment area／Water surface area 8.8km2／6ha Reservoir capacity 435 thousand m3 FY project started／completed 1935／1936 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.