With the embankment extending approximately 200 meters from north of present-day Toriya-bashi Bridge to Torisaka-jinja Shrine and measuring almost 10 meters in height, the reservoir is estimated to have been able to store up to 1.4 to 1.8 million tons of water.
堤防は現在の鳥屋橋北から鳥坂神社まで長さ約200メートル、高さは10メートル近くあり、満水時の貯水量は140万トンから180万トンと推測されている。